{"id":1241,"date":"2026-10-30T03:49:14","date_gmt":"2026-10-30T03:49:14","guid":{"rendered":"https:\/\/zhiformix.com\/?p=1241"},"modified":"2026-10-30T03:49:14","modified_gmt":"2026-10-30T03:49:14","slug":"purpose-of-retarder-in-concrete","status":"publish","type":"post","link":"https:\/\/zhiformix.com\/vi\/retarder\/purpose-of-retarder-in-concrete\/","title":{"rendered":"M\u1ee5c \u0111\u00edch c\u1ee7a ch\u1ea5t l\u00e0m ch\u1eadm \u0111\u00f4ng c\u1ee9ng trong b\u00ea t\u00f4ng l\u00e0 g\u00ec?"},"content":{"rendered":"<p class=\"wp-block-paragraph\">B\u00ea t\u00f4ng c\u00f3 th\u1eddi h\u1ea1n. Ngay t\u1eeb khi n\u01b0\u1edbc ti\u1ebfp x\u00fac v\u1edbi xi m\u0103ng, \u0111\u1ed3ng h\u1ed3 \u0111\u00e3 b\u1eaft \u0111\u1ea7u \u0111\u1ebfm ng\u01b0\u1ee3c. Trong \u0111i\u1ec1u ki\u1ec7n th\u1eddi ti\u1ebft m\u00e1t m\u1ebb v\u00e0 c\u00f3 nh\u00e0 m\u00e1y s\u1ea3n xu\u1ea5t g\u1ea7n \u0111\u00f3, th\u1eddi gian \u0111\u00f4ng k\u1ebft th\u00f4ng th\u01b0\u1eddng l\u00e0 \u0111\u1ee7. Trong \u0111i\u1ec1u ki\u1ec7n th\u1eddi ti\u1ebft n\u00f3ng, khi v\u1eadn chuy\u1ec3n qu\u00e3ng \u0111\u01b0\u1eddng d\u00e0i ho\u1eb7c khi \u0111\u1ed5 b\u00ea t\u00f4ng quy m\u00f4 l\u1edbn, th\u1eddi gian \u0111\u00f3 l\u00e0 kh\u00f4ng \u0111\u1ee7. B\u00ea t\u00f4ng s\u1ebd \u0111\u00f4ng c\u1ee9ng tr\u01b0\u1edbc khi \u0111\u1ed9i thi c\u00f4ng ho\u00e0n th\u00e0nh, d\u1eabn \u0111\u1ebfn c\u00e1c m\u1ed1i n\u1ed1i l\u1ea1nh, b\u1ec1 m\u1eb7t k\u00e9m ch\u1ea5t l\u01b0\u1ee3ng v\u00e0 l\u00e3ng ph\u00ed v\u1eadt li\u1ec7u. A <strong>ch\u1ea5t l\u00e0m ch\u1eadm<\/strong> gi\u1ea3i quy\u1ebft v\u1ea5n \u0111\u1ec1 n\u00e0y. B\u00e0i vi\u1ebft n\u00e0y gi\u1ea3i th\u00edch m\u1ee5c \u0111\u00edch c\u1ee7a ch\u1ea5t l\u00e0m ch\u1eadm \u0111\u00f4ng c\u1ee9ng trong b\u00ea t\u00f4ng, nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng, c\u00e1c lo\u1ea1i ch\u00ednh v\u00e0 c\u00e1ch \u0111\u1ecbnh l\u01b0\u1ee3ng \u0111\u00fang.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" src=\"data:image\/gif;base64,R0lGODlhAQABAIAAAAAAAP\/\/\/yH5BAEAAAAALAAAAAABAAEAAAIBRAA7\" data-src=\"https:\/\/zhiformix.com\/wp-content\/uploads\/2026\/10\/cover-concrete-retarder-pour-working-time-1024x576.webp\" alt=\"Workers pouring concrete with extended working time from retarder\" class=\"wp-image-1244 lazyload\"><noscript><img fetchpriority=\"high\" decoding=\"async\" width=\"1024\" height=\"576\" src=\"https:\/\/zhiformix.com\/wp-content\/uploads\/2026\/10\/cover-concrete-retarder-pour-working-time-1024x576.webp\" alt=\"Workers pouring concrete with extended working time from retarder\" class=\"wp-image-1244\" srcset=\"https:\/\/zhiformix.com\/wp-content\/uploads\/2026\/10\/cover-concrete-retarder-pour-working-time-1024x576.webp 1024w, https:\/\/zhiformix.com\/wp-content\/uploads\/2026\/10\/cover-concrete-retarder-pour-working-time-300x169.webp 300w, https:\/\/zhiformix.com\/wp-content\/uploads\/2026\/10\/cover-concrete-retarder-pour-working-time-768x432.webp 768w, https:\/\/zhiformix.com\/wp-content\/uploads\/2026\/10\/cover-concrete-retarder-pour-working-time-1536x864.webp 1536w, https:\/\/zhiformix.com\/wp-content\/uploads\/2026\/10\/cover-concrete-retarder-pour-working-time-18x10.webp 18w, https:\/\/zhiformix.com\/wp-content\/uploads\/2026\/10\/cover-concrete-retarder-pour-working-time.webp 1890w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/noscript><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Ch\u1ea5t l\u00e0m ch\u1eadm \u0111\u00f4ng c\u1ee9ng trong b\u00ea t\u00f4ng l\u00e0 g\u00ec?<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">B\u1ed9 gi\u1ea3m t\u1ed1c l\u00e0 m\u1ed9t <strong>ph\u1ee5 gia h\u00f3a h\u1ecdc<\/strong> \u0111\u01b0\u1ee3c th\u00eam v\u00e0o b\u00ea t\u00f4ng \u0111\u1ec3 l\u00e0m ch\u1eadm th\u1eddi gian \u0111\u00f4ng k\u1ebft. Ch\u1ea5t n\u00e0y kh\u00f4ng l\u00e0m thay \u0111\u1ed5i c\u01b0\u1eddng \u0111\u1ed9 cu\u1ed1i c\u00f9ng c\u1ee7a b\u00ea t\u00f4ng. N\u00f3 ch\u1ec9 l\u00e0m ch\u1eadm c\u00e1c ph\u1ea3n \u1ee9ng th\u1ee7y h\u00f3a ban \u0111\u1ea7u, nh\u1edd \u0111\u00f3 b\u00ea t\u00f4ng v\u1eabn gi\u1eef \u0111\u01b0\u1ee3c t\u00ednh d\u1ebbo v\u00e0 kh\u1ea3 n\u0103ng thi c\u00f4ng trong th\u1eddi gian d\u00e0i h\u01a1n.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c ch\u1ea5t l\u00e0m ch\u1eadm \u0111\u00f4ng c\u1ee9ng \u0111\u01b0\u1ee3c quy \u0111\u1ecbnh trong ti\u00eau chu\u1ea9n ASTM C494 v\u1ec1 ph\u1ee5 gia h\u00f3a h\u1ecdc. <strong>Lo\u1ea1i B<\/strong> l\u00e0 m\u1ed9t lo\u1ea1i ph\u1ee5 gia l\u00e0m ch\u1eadm \u0111\u00f4ng k\u1ebft. <strong>Lo\u1ea1i D<\/strong> l\u00e0 m\u1ed9t lo\u1ea1i ph\u1ee5 gia gi\u1ea3m l\u01b0\u1ee3ng n\u01b0\u1edbc v\u00e0 l\u00e0m ch\u1eadm qu\u00e1 tr\u00ecnh \u0111\u00f4ng k\u1ebft. <strong>Lo\u1ea1i G<\/strong> l\u00e0 m\u1ed9t lo\u1ea1i ph\u1ee5 gia gi\u1ea3m n\u01b0\u1edbc v\u00e0 l\u00e0m ch\u1eadm \u0111\u00f4ng k\u1ebft c\u00f3 hi\u1ec7u su\u1ea5t cao. C\u00e1c ph\u00e2n lo\u1ea1i n\u00e0y gi\u00fap c\u00e1c k\u1ef9 s\u01b0 x\u00e1c \u0111\u1ecbnh ch\u00ednh x\u00e1c c\u00e1c \u0111\u1eb7c t\u00ednh m\u00e0 h\u1ecd c\u1ea7n.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110i\u1ec3m m\u1ea5u ch\u1ed1t r\u1ea5t \u0111\u01a1n gi\u1ea3n. Thi\u1ebft b\u1ecb l\u00e0m ch\u1eadm gi\u00fap gi\u00e0nh th\u00eam th\u1eddi gian. M\u1ecdi th\u1ee9 kh\u00e1c \u0111\u1ec1u xu\u1ea5t ph\u00e1t t\u1eeb \u0111\u00f3.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>M\u1ee5c \u0111\u00edch c\u1ed1t l\u00f5i: K\u00e9o d\u00e0i th\u1eddi gian<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">B\u00ea t\u00f4ng t\u01b0\u01a1i ph\u1ea3i \u0111\u01b0\u1ee3c \u0111\u1ed5, \u0111\u1ea7m ch\u1eb7t v\u00e0 ho\u00e0n thi\u1ec7n tr\u01b0\u1edbc khi \u0111\u00f4ng c\u1ee9ng. Kho\u1ea3ng th\u1eddi gian th\u00f4ng th\u01b0\u1eddng th\u01b0\u1eddng l\u00e0 t\u1eeb 1 \u0111\u1ebfn 2 gi\u1edd. Nhi\u1ec1u c\u00f4ng tr\u00ecnh th\u1ef1c t\u1ebf c\u1ea7n nhi\u1ec1u th\u1eddi gian h\u01a1n. Ch\u1ea5t l\u00e0m ch\u1eadm \u0111\u00f4ng c\u1ee9ng gi\u00fap k\u00e9o d\u00e0i kho\u1ea3ng th\u1eddi gian \u0111\u00f3 th\u00eam v\u00e0i gi\u1edd, v\u00e0 qu\u00e1 tr\u00ecnh n\u00e0y di\u1ec5n ra m\u1ed9t c\u00e1ch c\u00f3 ki\u1ec3m so\u00e1t v\u00e0 c\u00f3 th\u1ec3 d\u1ef1 \u0111o\u00e1n \u0111\u01b0\u1ee3c.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Sau khi b\u00ea t\u00f4ng cu\u1ed1i c\u00f9ng \u0111\u00f4ng c\u1ee9ng, qu\u00e1 tr\u00ecnh th\u1ee7y h\u00f3a v\u1eabn ti\u1ebfp di\u1ec5n b\u00ecnh th\u01b0\u1eddng. Qu\u00e1 tr\u00ecnh ph\u00e1t tri\u1ec3n c\u01b0\u1eddng \u0111\u1ed9 di\u1ec5n ra v\u1edbi t\u1ed1c \u0111\u1ed9 b\u00ecnh th\u01b0\u1eddng ho\u1eb7c th\u1eadm ch\u00ed nhanh h\u01a1n. Do \u0111\u00f3, ch\u1ea5t l\u00e0m ch\u1eadm ch\u1ec9 thay \u0111\u1ed5i ti\u1ebfn \u0111\u1ed9, ch\u1ee9 kh\u00f4ng \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn k\u1ebft qu\u1ea3 cu\u1ed1i c\u00f9ng. B\u00ea t\u00f4ng v\u1eabn \u0111\u1ea1t \u0111\u01b0\u1ee3c c\u01b0\u1eddng \u0111\u1ed9 thi\u1ebft k\u1ebf.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>5 m\u1ee5c \u0111\u00edch ch\u00ednh c\u1ee7a ch\u1ea5t l\u00e0m ch\u1eadm \u0111\u00f4ng c\u1ee9ng trong b\u00ea t\u00f4ng<\/strong><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>1. Ch\u1ed1ng ch\u1ecdi v\u1edbi th\u1eddi ti\u1ebft n\u1eafng n\u00f3ng<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Nhi\u1ec7t \u0111\u1ed9 l\u00e0 k\u1ebb th\u00f9 l\u1edbn nh\u1ea5t c\u1ee7a th\u1eddi gian thi c\u00f4ng. Nhi\u1ec7t \u0111\u1ed9 kh\u00f4ng kh\u00ed cao l\u00e0m t\u0103ng t\u1ed1c \u0111\u1ed9 th\u1ee7y h\u00f3a c\u1ee7a xi m\u0103ng, v\u00e0 b\u00ea t\u00f4ng c\u00f3 th\u1ec3 \u0111\u00f4ng c\u1ee9ng v\u1edbi t\u1ed1c \u0111\u1ed9 \u0111\u00e1ng b\u00e1o \u0111\u1ed9ng v\u00e0o nh\u1eefng ng\u00e0y n\u1eafng n\u00f3ng. Ch\u1ea5t l\u00e0m ch\u1eadm \u0111\u00f4ng c\u1ee9ng gi\u00fap kh\u1eafc ph\u1ee5c hi\u1ec7n t\u01b0\u1ee3ng n\u00e0y. Ch\u1ea5t n\u00e0y gi\u00fap h\u1ed7n h\u1ee3p b\u00ea t\u00f4ng v\u1eabn d\u1ec5 thi c\u00f4ng ngay c\u1ea3 khi nhi\u1ec7t \u0111\u1ed9 t\u0103ng cao, nh\u1edd \u0111\u00f3 vi\u1ec7c \u0111\u1ed5 b\u00ea t\u00f4ng v\u00e0o m\u00f9a h\u00e8 v\u1eabn di\u1ec5n ra thu\u1eadn l\u1ee3i v\u00e0 an to\u00e0n.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>2. V\u01b0\u1ee3t qua nh\u1eefng tr\u1edf ng\u1ea1i do v\u1eadn chuy\u1ec3n k\u00e9o d\u00e0i v\u00e0 s\u1ef1 ch\u1eadm tr\u1ec5 t\u1ea1i c\u00f4ng tr\u01b0\u1eddng<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Kh\u00f4ng ph\u1ea3i c\u00f4ng tr\u01b0\u1eddng n\u00e0o c\u0169ng n\u1eb1m ngay c\u1ea1nh tr\u1ea1m tr\u1ed9n b\u00ea t\u00f4ng. Qu\u00e3ng \u0111\u01b0\u1eddng v\u1eadn chuy\u1ec3n d\u00e0i, \u00f9n t\u1eafc giao th\u00f4ng v\u00e0 th\u1eddi gian ch\u1edd \u0111\u1ee3i t\u1ea1i c\u00f4ng tr\u01b0\u1eddng \u0111\u1ec1u l\u00e0m m\u1ea5t \u0111i th\u1eddi gian thi c\u00f4ng. Ch\u1ea5t l\u00e0m ch\u1eadm \u0111\u00f4ng c\u1ee9ng gi\u00fap b\u1ea3o v\u1ec7 kh\u1ed1i b\u00ea t\u00f4ng trong su\u1ed1t qu\u00e1 tr\u00ecnh v\u1eadn chuy\u1ec3n. Nh\u1edd \u0111\u00f3, b\u00ea t\u00f4ng khi \u0111\u1ebfn n\u01a1i v\u1eabn c\u00f2n \u0111\u1ee7 \u0111\u1ed9 d\u1ebbo \u0111\u1ec3 thi c\u00f4ng v\u00e0 ho\u00e0n thi\u1ec7n \u0111\u00fang c\u00e1ch, thay v\u00ec \u0111\u1ebfn n\u01a1i trong t\u00ecnh tr\u1ea1ng \u0111\u00e3 \u0111\u00f4ng c\u1ee9ng m\u1ed9t n\u1eeda v\u00e0 kh\u00f4ng th\u1ec3 s\u1eed d\u1ee5ng \u0111\u01b0\u1ee3c.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>3. \u0110\u1ed5 b\u00ea t\u00f4ng cho c\u00e1c c\u00f4ng tr\u00ecnh quy m\u00f4 l\u1edbn m\u00e0 kh\u00f4ng \u0111\u1ec3 l\u1ea1i c\u00e1c m\u1ed1i n\u1ed1i l\u1ea1nh<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Vi\u1ec7c \u0111\u1ed5 b\u00ea t\u00f4ng quy m\u00f4 l\u1edbn c\u1ea7n c\u00f3 th\u1eddi gian. C\u00e1c c\u00f4ng tr\u00ecnh nh\u01b0 \u0111\u1eadp, m\u00f3ng d\u00e0y, t\u1ea5m s\u00e0n l\u1edbn v\u00e0 t\u01b0\u1eddng cao kh\u00f4ng th\u1ec3 \u0111\u01b0\u1ee3c \u0111\u1ed5 b\u00ea t\u00f4ng ch\u1ec9 trong m\u1ed9t l\u1ea7n nhanh ch\u00f3ng. N\u1ebfu m\u1ed9t l\u1edbp b\u00ea t\u00f4ng \u0111\u00e3 \u0111\u00f4ng c\u1ee9ng tr\u01b0\u1edbc khi l\u1edbp ti\u1ebfp theo \u0111\u01b0\u1ee3c \u0111\u1ed5 v\u00e0o, th\u00ec <strong>m\u1ed1i n\u1ed1i l\u1ea1nh<\/strong> c\u00e1c d\u1ea1ng. C\u00e1c m\u1ed1i n\u1ed1i l\u1ea1nh l\u00e0 nh\u1eefng m\u1eb7t ph\u1eb3ng y\u1ebfu v\u00e0 c\u00f3 th\u1ec3 b\u1ecb r\u00f2 r\u1ec9. Ch\u1ea5t l\u00e0m ch\u1eadm gi\u00fap duy tr\u00ec \u0111\u1ed9 t\u01b0\u01a1i c\u1ee7a t\u1eebng l\u1edbp \u0111\u1ee7 l\u00e2u \u0111\u1ec3 k\u1ebft d\u00ednh v\u1edbi l\u1edbp ti\u1ebfp theo. Qu\u00e1 tr\u00ecnh \u0111\u1ed5 b\u00ea t\u00f4ng di\u1ec5n ra li\u00ean t\u1ee5c, v\u00e0 k\u1ebft c\u1ea5u v\u1eabn gi\u1eef \u0111\u01b0\u1ee3c t\u00ednh nguy\u00ean kh\u1ed1i.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>4. T\u1ea1o b\u1ec1 m\u1eb7t ho\u00e0n thi\u1ec7n \u0111\u1eb9p h\u01a1n<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Vi\u1ec7c ho\u00e0n thi\u1ec7n v\u1ed9i v\u00e0ng s\u1ebd d\u1eabn \u0111\u1ebfn b\u1ec1 m\u1eb7t k\u00e9m ch\u1ea5t l\u01b0\u1ee3ng. Khi \u0111\u1ed9i thi c\u00f4ng ph\u1ea3i v\u1eadt l\u1ed9n v\u1edbi h\u1ed7n h\u1ee3p b\u00ea t\u00f4ng \u0111ang \u0111\u00f4ng c\u1ee9ng, h\u1ecd kh\u00f4ng th\u1ec3 san ph\u1eb3ng, l\u00e0m m\u1ecbn v\u00e0 tr\u00e1t b\u1ec1 m\u1eb7t m\u1ed9t c\u00e1ch \u0111\u00fang c\u00e1ch. Ch\u1ea5t l\u00e0m ch\u1eadm \u0111\u00f4ng c\u1ee9ng gi\u00fap \u0111\u1ed9i thi c\u00f4ng ho\u00e0n thi\u1ec7n c\u00f3 \u0111\u01b0\u1ee3c kho\u1ea3ng th\u1eddi gian tho\u1ea3i m\u00e1i v\u00e0 d\u1ed3i d\u00e0o. B\u1ec1 m\u1eb7t sau khi ho\u00e0n thi\u1ec7n s\u1ebd ph\u1eb3ng, ch\u1eafc v\u00e0 \u0111\u1ed3ng \u0111\u1ec1u. \u0110\u1ed1i v\u1edbi c\u00e1c t\u1ea5m b\u00ea t\u00f4ng l\u1ed9 thi\u00ean v\u00e0 b\u00ea t\u00f4ng ki\u1ebfn tr\u00fac, kho\u1ea3ng th\u1eddi gian b\u1ed5 sung n\u00e0y th\u1ec3 hi\u1ec7n tr\u1ef1c ti\u1ebfp qua v\u1ebb ngo\u00e0i cu\u1ed1i c\u00f9ng c\u1ee7a c\u00f4ng tr\u00ecnh.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>5. Gi\u1ea3m hi\u1ec7n t\u01b0\u1ee3ng t\u00edch t\u1ee5 nhi\u1ec7t trong b\u00ea t\u00f4ng kh\u1ed1i l\u01b0\u1ee3ng l\u1edbn<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c kh\u1ed1i b\u00ea t\u00f4ng l\u1edbn sinh ra l\u01b0\u1ee3ng nhi\u1ec7t \u0111\u00e1ng k\u1ec3 trong qu\u00e1 tr\u00ecnh th\u1ee7y h\u00f3a xi m\u0103ng. \u0110\u1ec9nh nhi\u1ec7t \u0111\u1ed9t ng\u1ed9t v\u00e0 t\u1eadp trung c\u00f3 th\u1ec3 g\u00e2y ra hi\u1ec7n t\u01b0\u1ee3ng n\u1ee9t do nhi\u1ec7t. B\u1eb1ng c\u00e1ch l\u00e0m ch\u1eadm c\u00e1c ph\u1ea3n \u1ee9ng ban \u0111\u1ea7u, ch\u1ea5t l\u00e0m ch\u1eadm gi\u00fap ph\u00e2n b\u1ed5 qu\u00e1 tr\u00ecnh sinh nhi\u1ec7t trong m\u1ed9t kho\u1ea3ng th\u1eddi gian d\u00e0i h\u01a1n. Nhi\u1ec7t \u0111\u1ed9 \u0111\u1ec9nh gi\u1ea3m xu\u1ed1ng, v\u00e0 nguy c\u01a1 n\u1ee9t do nhi\u1ec7t c\u0169ng gi\u1ea3m theo. \u0110i\u1ec1u n\u00e0y khi\u1ebfn ch\u1ea5t l\u00e0m ch\u1eadm tr\u1edf n\u00ean r\u1ea5t h\u1eefu \u00edch trong c\u00e1c c\u00f4ng tr\u00ecnh b\u00ea t\u00f4ng kh\u1ed1i l\u01b0\u1ee3ng l\u1edbn.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" src=\"data:image\/gif;base64,R0lGODlhAQABAIAAAAAAAP\/\/\/yH5BAEAAAAALAAAAAABAAEAAAIBRAA7\" data-src=\"https:\/\/zhiformix.com\/wp-content\/uploads\/2026\/10\/concrete-retarder-admixture-dosing-plant-1024x576.webp\" alt=\"Dosing concrete retarder admixture at a batching plant\" class=\"wp-image-1243 lazyload\"><noscript><img decoding=\"async\" width=\"1024\" height=\"576\" src=\"https:\/\/zhiformix.com\/wp-content\/uploads\/2026\/10\/concrete-retarder-admixture-dosing-plant-1024x576.webp\" alt=\"Dosing concrete retarder admixture at a batching plant\" class=\"wp-image-1243\" srcset=\"https:\/\/zhiformix.com\/wp-content\/uploads\/2026\/10\/concrete-retarder-admixture-dosing-plant-1024x576.webp 1024w, https:\/\/zhiformix.com\/wp-content\/uploads\/2026\/10\/concrete-retarder-admixture-dosing-plant-300x169.webp 300w, https:\/\/zhiformix.com\/wp-content\/uploads\/2026\/10\/concrete-retarder-admixture-dosing-plant-768x432.webp 768w, https:\/\/zhiformix.com\/wp-content\/uploads\/2026\/10\/concrete-retarder-admixture-dosing-plant-1536x864.webp 1536w, https:\/\/zhiformix.com\/wp-content\/uploads\/2026\/10\/concrete-retarder-admixture-dosing-plant-18x10.webp 18w, https:\/\/zhiformix.com\/wp-content\/uploads\/2026\/10\/concrete-retarder-admixture-dosing-plant.webp 1890w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/noscript><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>C\u01a1 ch\u1ebf ho\u1ea1t \u0111\u1ed9ng c\u1ee7a ch\u1ea5t l\u00e0m ch\u1eadm \u0111\u00f4ng c\u1ee9ng b\u00ea t\u00f4ng<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">C\u01a1 ch\u1ebf n\u00e0y r\u1ea5t \u0111\u01a1n gi\u1ea3n. Khi xi m\u0103ng ti\u1ebfp x\u00fac v\u1edbi n\u01b0\u1edbc, m\u1ed9t s\u1ed1 ph\u1ea3n \u1ee9ng s\u1ebd di\u1ec5n ra \u0111\u1ed3ng th\u1eddi. C\u00e1c ph\u1ea3n \u1ee9ng di\u1ec5n ra nhanh nh\u1ea5t li\u00ean quan \u0111\u1ebfn tricalcium aluminate v\u00e0 c\u00e1c ph\u1ea3n \u1ee9ng silicat giai \u0111o\u1ea1n \u0111\u1ea7u. C\u00e1c ph\u00e2n t\u1eed ch\u1ea5t l\u00e0m ch\u1eadm ph\u1ea3n \u1ee9ng b\u00e1m v\u00e0o b\u1ec1 m\u1eb7t c\u00e1c h\u1ea1t xi m\u0103ng. L\u1edbp ph\u00e2n t\u1eed m\u1ecfng n\u00e0y l\u00e0m ch\u1eadm qu\u00e1 tr\u00ecnh ti\u1ebfp x\u00fac gi\u1eefa xi m\u0103ng v\u00e0 n\u01b0\u1edbc.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">H\u00e3y coi \u0111\u00f3 nh\u01b0 m\u1ed9t c\u01a1 ch\u1ebf h\u00e3m t\u1ea1m th\u1eddi. C\u01a1 ch\u1ebf n\u00e0y duy tr\u00ec t\u00e1c d\u1ee5ng trong nh\u1eefng gi\u1edd \u0111\u1ea7u ti\u00ean, khi kh\u1ea3 n\u0103ng thi c\u00f4ng l\u00e0 y\u1ebfu t\u1ed1 quan tr\u1ecdng nh\u1ea5t. Sau \u0111\u00f3, n\u00f3 s\u1ebd \u0111\u01b0\u1ee3c gi\u1ea3i ph\u00f3ng. Qu\u00e1 tr\u00ecnh c\u1ea5p n\u01b0\u1edbc ti\u1ebfp t\u1ee5c, b\u00ea t\u00f4ng \u0111\u00f4ng c\u1ee9ng v\u00e0 \u0111\u1ed9 b\u1ec1n ph\u00e1t tri\u1ec3n b\u00ecnh th\u01b0\u1eddng. S\u1ef1 ch\u1eadm tr\u1ec5 n\u00e0y l\u00e0 t\u1ea1m th\u1eddi theo thi\u1ebft k\u1ebf.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1ee9c \u0111\u1ed9 tr\u00ec ho\u00e3n ph\u1ee5 thu\u1ed9c v\u00e0o th\u00e0nh ph\u1ea7n h\u00f3a h\u1ecdc v\u00e0 li\u1ec1u l\u01b0\u1ee3ng. Trong \u0111i\u1ec1u ki\u1ec7n th\u1eed nghi\u1ec7m ti\u00eau chu\u1ea9n, c\u00e1c ch\u1ea5t ph\u1ee5 gia lo\u1ea1i B v\u00e0 lo\u1ea1i D ph\u1ea3i l\u00e0m ch\u1eadm qu\u00e1 tr\u00ecnh \u0111\u00f4ng k\u1ebft ban \u0111\u1ea7u \u00edt nh\u1ea5t 1 gi\u1edd so v\u1edbi b\u00ea t\u00f4ng th\u00f4ng th\u01b0\u1eddng. Tr\u00ean th\u1ef1c t\u1ebf, c\u00f3 th\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c h\u1ea7u nh\u01b0 b\u1ea5t k\u1ef3 m\u1ee9c \u0111\u1ed9 tr\u00ec ho\u00e3n n\u00e0o b\u1eb1ng c\u00e1ch \u0111i\u1ec1u ch\u1ec9nh s\u1ea3n ph\u1ea9m v\u00e0 li\u1ec1u l\u01b0\u1ee3ng.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>C\u00e1c lo\u1ea1i ch\u1ea5t l\u00e0m ch\u1eadm \u0111\u00f4ng c\u1ee9ng b\u00ea t\u00f4ng ph\u1ed5 bi\u1ebfn<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c ch\u1ea5t l\u00e0m ch\u1eadm \u0111\u00f4ng k\u1ebft thu\u1ed9c nhi\u1ec1u h\u1ecd h\u00f3a h\u1ecdc kh\u00e1c nhau. M\u1ed7i lo\u1ea1i \u0111\u1ec1u c\u00f3 nh\u1eefng \u0111\u1eb7c t\u00ednh ri\u00eang, v\u00e0 vi\u1ec7c l\u1ef1a ch\u1ecdn ph\u1ee5 thu\u1ed9c v\u00e0o t\u1eebng d\u1ef1 \u00e1n c\u1ee5 th\u1ec3 v\u00e0 lo\u1ea1i xi m\u0103ng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Lignosulfonat<\/strong> l\u00e0 nh\u1eefng lo\u1ea1i c\u00f3 l\u1ecbch s\u1eed l\u00e2u \u0111\u1eddi nh\u1ea5t v\u00e0 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i nh\u1ea5t. Ch\u00fang \u0111\u01b0\u1ee3c s\u1ea3n xu\u1ea5t t\u1eeb qu\u00e1 tr\u00ecnh ch\u1ebf bi\u1ebfn g\u1ed7, v\u1eeba c\u00f3 t\u00e1c d\u1ee5ng l\u00e0m ch\u1eadm qu\u00e1 tr\u00ecnh \u0111\u00f4ng k\u1ebft v\u1eeba gi\u00fap gi\u1ea3m nh\u1eb9 l\u01b0\u1ee3ng n\u01b0\u1edbc. Nhi\u1ec1u lo\u1ea1i ph\u1ee5 gia lo\u1ea1i D c\u00f3 th\u00e0nh ph\u1ea7n ch\u00ednh l\u00e0 lignosulfonat.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e1c axit hydroxycarboxylic v\u00e0 mu\u1ed1i c\u1ee7a ch\u00fang<\/strong> bao g\u1ed3m axit xitric, axit tartaric v\u00e0 axit gluconic (th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng d\u01b0\u1edbi d\u1ea1ng natri gluconat). C\u00e1c ch\u1ea5t n\u00e0y mang l\u1ea1i hi\u1ec7u \u1ee9ng tr\u00ec ho\u00e3n m\u1ea1nh m\u1ebd v\u00e0 c\u00f3 th\u1ec3 d\u1ef1 \u0111o\u00e1n \u0111\u01b0\u1ee3c. Li\u1ec1u l\u01b0\u1ee3ng nh\u1ecf c\u0169ng t\u1ea1o ra t\u00e1c d\u1ee5ng l\u1edbn, do \u0111\u00f3 vi\u1ec7c \u0111\u1ecbnh li\u1ec1u ch\u00ednh x\u00e1c l\u00e0 r\u1ea5t quan tr\u1ecdng.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Carbohydrate v\u00e0 \u0111\u01b0\u1eddng<\/strong> c\u0169ng l\u00e0m ch\u1eadm qu\u00e1 tr\u00ecnh th\u1ee7y h\u00f3a c\u1ee7a xi m\u0103ng. Ch\u00fang \u0111\u01a1n gi\u1ea3n v\u00e0 hi\u1ec7u qu\u1ea3, nh\u01b0ng c\u1ea7n \u0111\u01b0\u1ee3c ki\u1ec3m so\u00e1t c\u1ea9n th\u1eadn v\u00ec t\u00e1c d\u1ee5ng c\u1ee7a ch\u00fang c\u00f3 th\u1ec3 r\u1ea5t m\u1ea1nh.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Phosphat v\u00e0 phosphonat<\/strong> t\u1ea1o th\u00e0nh m\u1ed9t nh\u00f3m kh\u00e1c. Ch\u00fang t\u01b0\u01a1ng t\u00e1c v\u1edbi ph\u1ea3n \u1ee9ng h\u00f3a h\u1ecdc c\u1ee7a xi m\u0103ng v\u00e0 mang l\u1ea1i hi\u1ec7u \u1ee9ng l\u00e0m ch\u1eadm \u0111\u00f4ng k\u1ebft \u1ed5n \u0111\u1ecbnh, \u0111\u1eb7c bi\u1ec7t l\u00e0 \u1edf nhi\u1ec7t \u0111\u1ed9 cao.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Nhi\u1ec1u s\u1ea3n ph\u1ea9m th\u01b0\u01a1ng m\u1ea1i k\u1ebft h\u1ee3p c\u00e1c th\u00e0nh ph\u1ea7n h\u00f3a h\u1ecdc n\u00e0y. Ch\u1eb3ng h\u1ea1n, ph\u1ee5 gia lo\u1ea1i D k\u1ebft h\u1ee3p kh\u1ea3 n\u0103ng gi\u1ea3m l\u01b0\u1ee3ng n\u01b0\u1edbc v\u1edbi kh\u1ea3 n\u0103ng l\u00e0m ch\u1eadm qu\u00e1 tr\u00ecnh \u0111\u00f4ng k\u1ebft trong c\u00f9ng m\u1ed9t s\u1ea3n ph\u1ea9m. S\u1ea3n ph\u1ea9m lo\u1ea1i G c\u0169ng c\u00f3 t\u00e1c d\u1ee5ng t\u01b0\u01a1ng t\u1ef1 \u1edf m\u1ee9c gi\u1ea3m l\u01b0\u1ee3ng n\u01b0\u1edbc cao.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Li\u1ec1u l\u01b0\u1ee3ng: B\u00ea t\u00f4ng c\u1ea7n bao nhi\u00eau ch\u1ea5t l\u00e0m ch\u1eadm \u0111\u00f4ng c\u1ee9ng?<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Kh\u00f4ng c\u00f3 li\u1ec1u l\u01b0\u1ee3ng ch\u00ednh x\u00e1c duy nh\u1ea5t n\u00e0o. Li\u1ec1u l\u01b0\u1ee3ng ph\u00f9 h\u1ee3p ph\u1ee5 thu\u1ed9c v\u00e0o lo\u1ea1i xi m\u0103ng, nhi\u1ec7t \u0111\u1ed9 m\u00f4i tr\u01b0\u1eddng, th\u1eddi gian tr\u00ec ho\u00e3n mong mu\u1ed1n v\u00e0 t\u1eebng s\u1ea3n ph\u1ea9m c\u1ee5 th\u1ec3. Li\u1ec1u l\u01b0\u1ee3ng th\u01b0\u01a1ng m\u1ea1i th\u00f4ng th\u01b0\u1eddng dao \u0111\u1ed9ng t\u1eeb m\u1ed9t ph\u1ea7n nh\u1ecf ph\u1ea7n tr\u0103m \u0111\u1ebfn kho\u1ea3ng m\u1ed9t ph\u1ea7n tr\u0103m ho\u1eb7c h\u01a1n so v\u1edbi tr\u1ecdng l\u01b0\u1ee3ng xi m\u0103ng. B\u1ea3ng d\u1eef li\u1ec7u s\u1ea3n ph\u1ea9m cung c\u1ea5p kho\u1ea3ng gi\u00e1 tr\u1ecb ban \u0111\u1ea7u.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00f3 hai quy t\u1eafc quan tr\u1ecdng nh\u1ea5t. Th\u1ee9 nh\u1ea5t, <strong>lu\u00f4n ch\u1ea1y c\u00e1c b\u1ea3n tr\u1ed9n th\u1eed nghi\u1ec7m<\/strong>. C\u00e1c th\u1eed nghi\u1ec7m trong ph\u00f2ng th\u00ed nghi\u1ec7m ho\u1eb7c t\u1ea1i c\u00f4ng tr\u01b0\u1eddng v\u1edbi ch\u00ednh lo\u1ea1i xi m\u0103ng, c\u1ed1t li\u1ec7u v\u00e0 \u0111i\u1ec1u ki\u1ec7n nhi\u1ec7t \u0111\u1ed9 th\u1ef1c t\u1ebf c\u1ee7a qu\u00fd v\u1ecb l\u00e0 c\u00e1ch duy nh\u1ea5t \u0111\u00e1ng tin c\u1eady \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh li\u1ec1u l\u01b0\u1ee3ng. Th\u1ee9 hai, <strong>tr\u00e1nh d\u00f9ng qu\u00e1 li\u1ec1u<\/strong>. N\u1ebfu s\u1eed d\u1ee5ng qu\u00e1 nhi\u1ec1u ch\u1ea5t l\u00e0m ch\u1eadm \u0111\u00f4ng c\u1ee9ng c\u00f3 th\u1ec3 l\u00e0m ch\u1eadm qu\u00e1 tr\u00ecnh \u0111\u00f4ng c\u1ee9ng m\u1ed9t c\u00e1ch qu\u00e1 m\u1ee9c, d\u1eabn \u0111\u1ebfn hi\u1ec7n t\u01b0\u1ee3ng m\u1ea5t \u0111\u1ed9 s\u1ee5t nhanh sau \u0111\u00f3 v\u00e0 l\u00e0m t\u0103ng nguy c\u01a1 n\u1ee9t do co ng\u00f3t d\u1ebbo. Vi\u1ec7c \u0111\u1ecbnh l\u01b0\u1ee3ng c\u1ea9n th\u1eadn s\u1ebd gi\u00fap duy tr\u00ec t\u1ea5t c\u1ea3 c\u00e1c l\u1ee3i \u00edch m\u00e0 kh\u00f4ng g\u00e2y ra b\u1ea5t k\u1ef3 v\u1ea5n \u0111\u1ec1 n\u00e0o.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Nhi\u1ec7t \u0111\u1ed9 l\u00e0 y\u1ebfu t\u1ed1 c\u1ea7n \u0111\u01b0\u1ee3c ch\u00fa \u00fd \u0111\u1eb7c bi\u1ec7t. C\u00f9ng m\u1ed9t li\u1ec1u l\u01b0\u1ee3ng s\u1ebd mang l\u1ea1i hi\u1ec7u qu\u1ea3 l\u00e0m ch\u1eadm kh\u00e1c nhau t\u00f9y theo nhi\u1ec7t \u0111\u1ed9. Trong \u0111i\u1ec1u ki\u1ec7n th\u1eddi ti\u1ebft n\u00f3ng, th\u01b0\u1eddng c\u1ea7n li\u1ec1u l\u01b0\u1ee3ng cao h\u01a1n \u0111\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c hi\u1ec7u qu\u1ea3 t\u01b0\u01a1ng t\u1ef1. H\u00e3y ghi ch\u00e9p l\u1ea1i li\u1ec1u l\u01b0\u1ee3ng s\u1eed d\u1ee5ng theo t\u1eebng m\u00f9a v\u00e0 \u0111i\u1ec1u ch\u1ec9nh khi \u0111i\u1ec1u ki\u1ec7n thay \u0111\u1ed5i.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Ch\u1ea5t l\u00e0m ch\u1eadm \u0111\u00f4ng c\u1ee9ng c\u00f3 l\u00e0m suy y\u1ebfu b\u00ea t\u00f4ng kh\u00f4ng?<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u00e2y l\u00e0 lo ng\u1ea1i ph\u1ed5 bi\u1ebfn nh\u1ea5t, v\u00e0 c\u00e2u tr\u1ea3 l\u1eddi s\u1ebd khi\u1ebfn qu\u00fd v\u1ecb an t\u00e2m. Ch\u1ea5t l\u00e0m ch\u1eadm qu\u00e1 tr\u00ecnh \u0111\u00f4ng k\u1ebft gi\u00fap tr\u00ec ho\u00e3n qu\u00e1 tr\u00ecnh \u0111\u00f4ng k\u1ebft, nh\u01b0ng kh\u00f4ng l\u00e0m gi\u1ea3m c\u01b0\u1eddng \u0111\u1ed9 l\u00e2u d\u00e0i. Sau khi qu\u00e1 tr\u00ecnh \u0111\u00f4ng k\u1ebft di\u1ec5n ra, qu\u00e1 tr\u00ecnh th\u1ee7y h\u00f3a v\u00e0 \u0111\u00f4ng c\u1ee9ng ti\u1ebfp t\u1ee5c di\u1ec5n ra v\u1edbi t\u1ed1c \u0111\u1ed9 b\u00ecnh th\u01b0\u1eddng ho\u1eb7c nhanh h\u01a1n. B\u00ea t\u00f4ng s\u1ebd \u0111\u1ea1t \u0111\u01b0\u1ee3c c\u01b0\u1eddng \u0111\u1ed9 thi\u1ebft k\u1ebf \u0111\u00fang ti\u1ebfn \u0111\u1ed9.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u1ed9 b\u1ec1n ban \u0111\u1ea7u c\u00f3 th\u1ec3 ph\u00e1t tri\u1ec3n mu\u1ed9n h\u01a1n m\u1ed9t ch\u00fat so v\u1edbi b\u00ea t\u00f4ng th\u00f4ng th\u01b0\u1eddng. \u0110\u00f3 l\u00e0 s\u1ef1 \u0111\u00e1nh \u0111\u1ed5i d\u1ef1 ki\u1ebfn \u0111\u1ec3 c\u00f3 th\u1eddi gian thi c\u00f4ng d\u00e0i h\u01a1n, v\u00e0 \u0111i\u1ec1u n\u00e0y hi\u1ebfm khi g\u00e2y ra v\u1ea5n \u0111\u1ec1. Th\u1eddi \u0111i\u1ec3m th\u00e1o v\u00e1n khu\u00f4n c\u00f3 th\u1ec3 thay \u0111\u1ed5i v\u00e0i gi\u1edd. H\u00e3y l\u00ean k\u1ebf ho\u1ea1ch cho \u0111i\u1ec1u n\u00e0y, v\u00e0 d\u1ef1 \u00e1n s\u1ebd v\u1eabn ti\u1ebfn tri\u1ec3n \u0111\u00fang ti\u1ebfn \u0111\u1ed9.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">R\u1ee7i ro th\u1ef1c s\u1ef1 kh\u00f4ng n\u1eb1m \u1edf vi\u1ec7c s\u1eed d\u1ee5ng li\u1ec1u l\u01b0\u1ee3ng b\u00ecnh th\u01b0\u1eddng m\u00e0 l\u00e0 do d\u00f9ng qu\u00e1 li\u1ec1u. L\u01b0\u1ee3ng ch\u1ea5t l\u00e0m ch\u1eadm \u0111\u00f4ng c\u1ee9ng qu\u00e1 m\u1ee9c c\u00f3 th\u1ec3 khi\u1ebfn b\u00ea t\u00f4ng duy tr\u00ec tr\u1ea1ng th\u00e1i d\u1ebbo qu\u00e1 l\u00e2u, t\u1eeb \u0111\u00f3 g\u00e2y ra nh\u1eefng kh\u00f3 kh\u0103n trong vi\u1ec7c ho\u00e0n thi\u1ec7n b\u1ec1 m\u1eb7t v\u00e0 ti\u1ebfn \u0111\u1ed9 thi c\u00f4ng. H\u00e3y tu\u00e2n th\u1ee7 c\u00e1c li\u1ec1u l\u01b0\u1ee3ng \u0111\u00e3 \u0111\u01b0\u1ee3c ki\u1ec3m ch\u1ee9ng, v\u00e0 \u0111\u1ed9 b\u1ec1n c\u1ee7a b\u00ea t\u00f4ng s\u1ebd \u0111\u01b0\u1ee3c \u0111\u1ea3m b\u1ea3o.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Ch\u1ea5t l\u00e0m ch\u1eadm \u0111\u00f4ng c\u1ee9ng so v\u1edbi c\u00e1c ph\u1ee5 gia b\u00ea t\u00f4ng kh\u00e1c<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Vi\u1ec7c quan s\u00e1t v\u1ecb tr\u00ed c\u1ee7a c\u00e1c thi\u1ebft b\u1ecb gi\u1ea3m t\u1ed1c so v\u1edbi c\u00e1c thi\u1ebft b\u1ecb l\u00e2n c\u1eadn s\u1ebd r\u1ea5t h\u1eefu \u00edch.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th><strong>H\u1ed7n h\u1ee3p<\/strong><\/th><th><strong>M\u1ee5c \u0111\u00edch<\/strong><\/th><th><strong>Lo\u1ea1i ASTM C494<\/strong><\/th><\/tr><\/thead><tbody><tr><td>Ch\u1ea5t l\u00e0m ch\u1eadm<\/td><td>C\u00e0i \u0111\u1eb7t th\u1eddi gian tr\u00ec ho\u00e3n, k\u00e9o d\u00e0i th\u1eddi gian l\u00e0m vi\u1ec7c<\/td><td>Lo\u1ea1i B<\/td><\/tr><tr><td>Ch\u1ea5t gi\u1ea3m l\u01b0\u1ee3ng n\u01b0\u1edbc + ch\u1ea5t l\u00e0m ch\u1eadm \u0111\u00f4ng k\u1ebft<\/td><td>Gi\u1ea3m l\u01b0\u1ee3ng n\u01b0\u1edbc v\u00e0 l\u00e0m ch\u1eadm qu\u00e1 tr\u00ecnh \u0111\u00f4ng c\u1ee9ng<\/td><td>Lo\u1ea1i D<\/td><\/tr><tr><td>Ch\u1ea5t gi\u1ea3m l\u01b0\u1ee3ng n\u01b0\u1edbc hi\u1ec7u su\u1ea5t cao + ch\u1ea5t l\u00e0m ch\u1eadm \u0111\u00f4ng k\u1ebft<\/td><td>Gi\u1ea3m l\u01b0\u1ee3ng n\u01b0\u1edbc \u0111\u00e1ng k\u1ec3 v\u1edbi th\u1eddi gian \u0111\u00f4ng k\u1ebft ch\u1eadm<\/td><td>Lo\u1ea1i G<\/td><\/tr><tr><td>B\u1ed9 t\u0103ng t\u1ed1c<\/td><td>T\u0103ng t\u1ed1c \u0111\u1ed9 thi c\u00f4ng v\u00e0 \u0111\u1ed9 b\u1ec1n ban \u0111\u1ea7u<\/td><td>Lo\u1ea1i C<\/td><\/tr><tr><td>Ch\u1ea5t gi\u1ea3m n\u01b0\u1edbc<\/td><td>Gi\u1ea3m h\u00e0m l\u01b0\u1ee3ng n\u01b0\u1edbc<\/td><td>Lo\u1ea1i A<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Ch\u1ea5t l\u00e0m ch\u1eadm v\u00e0 ch\u1ea5t l\u00e0m nhanh l\u00e0 hai lo\u1ea1i ch\u1ea5t \u0111\u1ed1i l\u1eadp nhau. Lo\u1ea1i n\u00e0y gi\u00fap k\u00e9o d\u00e0i th\u1eddi gian, lo\u1ea1i kia gi\u00fap ti\u1ebft ki\u1ec7m th\u1eddi gian. Ch\u1ea5t gi\u1ea3m n\u01b0\u1edbc v\u00e0 ch\u1ea5t si\u00eau d\u1ebbo l\u00e0m thay \u0111\u1ed5i h\u00e0m l\u01b0\u1ee3ng n\u01b0\u1edbc v\u00e0 \u0111\u1ed9 ch\u1ea3y c\u1ee7a h\u1ed7n h\u1ee3p, \u0111\u1ed3ng th\u1eddi m\u1ed9t s\u1ed1 lo\u1ea1i c\u00f2n c\u00f3 t\u00e1c d\u1ee5ng ph\u1ee5 l\u00e0 l\u00e0m thay \u0111\u1ed5i th\u1eddi gian \u0111\u00f4ng k\u1ebft. L\u1ef1a ch\u1ecdn ph\u00f9 h\u1ee3p ph\u1ee5 thu\u1ed9c v\u00e0o y\u1ebfu t\u1ed1 m\u00e0 d\u1ef1 \u00e1n c\u1ee7a b\u1ea1n c\u1ea7n nh\u1ea5t: th\u1eddi gian, t\u1ed1c \u0111\u1ed9 \u0111\u1ea1t c\u01b0\u1eddng \u0111\u1ed9, hay kh\u1ea3 n\u0103ng gi\u1ea3m n\u01b0\u1edbc.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>L\u1ef1a ch\u1ecdn gi\u1ea3i ph\u00e1p ph\u00f9 h\u1ee3p cho d\u1ef1 \u00e1n c\u1ee7a b\u1ea1n<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">H\u00e3y b\u1eaft \u0111\u1ea7u t\u1eeb v\u1ea5n \u0111\u1ec1. Vi\u1ec7c \u0111\u1ed5 b\u00ea t\u00f4ng trong \u0111i\u1ec1u ki\u1ec7n th\u1eddi ti\u1ebft n\u00f3ng, v\u1eadn chuy\u1ec3n qu\u00e3ng \u0111\u01b0\u1eddng d\u00e0i v\u00e0 c\u00e1c \u0111\u1ee3t \u0111\u1ed5 b\u00ea t\u00f4ng li\u00ean t\u1ee5c v\u1edbi kh\u1ed1i l\u01b0\u1ee3ng l\u1edbn th\u01b0\u1eddng \u0111\u00f2i h\u1ecfi ph\u1ea3i s\u1eed d\u1ee5ng ch\u1ea5t l\u00e0m ch\u1eadm \u0111\u00f4ng k\u1ebft ho\u1eb7c ch\u1ea5t gi\u1ea3m n\u01b0\u1edbc c\u00f3 t\u00e1c d\u1ee5ng l\u00e0m ch\u1eadm \u0111\u00f4ng k\u1ebft. Ng\u01b0\u1ee3c l\u1ea1i, ti\u1ebfn \u0111\u1ed9 g\u1ea5p r\u00fat v\u00e0 th\u1eddi ti\u1ebft l\u1ea1nh l\u1ea1i \u0111\u00f2i h\u1ecfi ph\u1ea3i s\u1eed d\u1ee5ng ch\u1ea5t l\u00e0m nhanh \u0111\u00f4ng k\u1ebft. H\u00e3y trao \u0111\u1ed5i v\u1edbi nh\u00e0 cung c\u1ea5p ph\u1ee5 gia, chia s\u1ebb c\u00f4ng th\u1ee9c ph\u1ed1i tr\u1ed9n v\u00e0 \u0111i\u1ec1u ki\u1ec7n th\u1ef1c t\u1ebf t\u1ea1i c\u00f4ng tr\u01b0\u1eddng, \u0111\u1ed3ng th\u1eddi ti\u1ebfn h\u00e0nh th\u1eed nghi\u1ec7m tr\u01b0\u1edbc khi th\u1ef1c hi\u1ec7n \u0111\u1ee3t \u0111\u1ed5 b\u00ea t\u00f4ng th\u1ef1c t\u1ebf \u0111\u1ea7u ti\u00ean.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"http:\/\/zhiweichem.com\/\" target=\"_blank\" data-type=\"link\" data-id=\"http:\/\/zhiweichem.com\/\" rel=\"noreferrer noopener\"><strong>C\u00f4ng ty TNHH V\u1eadt li\u1ec7u M\u1edbi Zhiwei (Jinan).<\/strong> <\/a>cung c\u1ea5p c\u00e1c ch\u1ea5t ph\u1ee5 gia h\u00f3a h\u1ecdc trong x\u00e2y d\u1ef1ng cho kh\u00e1ch h\u00e0ng tr\u00ean to\u00e0n th\u1ebf gi\u1edbi. C\u00f4ng ty n\u00e0y n\u1ed5i ti\u1ebfng v\u1edbi c\u00e1c s\u1ea3n ph\u1ea9m ete xenluloza v\u00e0 ch\u1ea5t l\u00e0m ch\u1eadm \u0111\u00f4ng c\u1ee9ng th\u1ea1ch cao <strong><a href=\"https:\/\/zhiformix.com\/vi\/gypsum-retarder\/\" target=\"_blank\" data-type=\"link\" data-id=\"https:\/\/zhiformix.com\/gypsum-retarder\/\" rel=\"noreferrer noopener\">ZhiFormix\u2122 GR-01<\/a><\/strong>, v\u00e0 c\u00f4ng ty \u00e1p d\u1ee5ng c\u00f9ng m\u1ed9t tri\u1ebft l\u00fd v\u1ec1 ch\u1ea5t l\u01b0\u1ee3ng cho m\u1ecdi d\u00f2ng s\u1ea3n ph\u1ea9m. N\u1ebfu d\u1ef1 \u00e1n c\u1ee7a qu\u00fd kh\u00e1ch li\u00ean quan \u0111\u1ebfn v\u1eadt li\u1ec7u g\u1ed1c th\u1ea1ch cao, ZhiFormix\u2122 GR-01 s\u1ebd mang \u0111\u1ebfn cho qu\u00fd kh\u00e1ch th\u1eddi gian \u0111\u00f4ng k\u1ebft c\u00f3 th\u1ec3 \u0111i\u1ec1u ch\u1ec9nh c\u00f9ng v\u1edbi s\u1ef1 h\u1ed7 tr\u1ee3 k\u1ef9 thu\u1eadt \u0111\u00e1ng tin c\u1eady. \u0110\u1ed1i v\u1edbi c\u00e1c th\u1eafc m\u1eafc v\u1ec1 ph\u1ee5 gia b\u00ea t\u00f4ng, \u0111\u1ed9i ng\u0169 Zhiwei s\u1eb5n s\u00e0ng h\u1ed7 tr\u1ee3 qu\u00fd kh\u00e1ch t\u00ecm ra h\u01b0\u1edbng \u0111i ph\u00f9 h\u1ee3p. H\u00e3y li\u00ean h\u1ec7 v\u1edbi C\u00f4ng ty TNHH V\u1eadt li\u1ec7u M\u1edbi Zhiwei (Jinan) \u0111\u1ec3 th\u1ea3o lu\u1eadn v\u1ec1 \u1ee9ng d\u1ee5ng c\u1ee7a b\u1ea1n.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>C\u00e1c c\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p<\/strong><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>M\u1ee5c \u0111\u00edch c\u1ee7a ch\u1ea5t l\u00e0m ch\u1eadm \u0111\u00f4ng c\u1ee9ng trong b\u00ea t\u00f4ng l\u00e0 g\u00ec?<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1ee5c \u0111\u00edch c\u1ee7a n\u00f3 l\u00e0 l\u00e0m ch\u1eadm th\u1eddi gian \u0111\u00f4ng k\u1ebft c\u1ee7a b\u00ea t\u00f4ng v\u00e0 k\u00e9o d\u00e0i kho\u1ea3ng th\u1eddi gian thi c\u00f4ng. \u0110i\u1ec1u n\u00e0y r\u1ea5t h\u1eefu \u00edch trong \u0111i\u1ec1u ki\u1ec7n th\u1eddi ti\u1ebft n\u00f3ng, trong qu\u00e1 tr\u00ecnh v\u1eadn chuy\u1ec3n \u0111\u01b0\u1eddng d\u00e0i v\u00e0 khi \u0111\u1ed5 b\u00ea t\u00f4ng quy m\u00f4 l\u1edbn, n\u01a1i vi\u1ec7c \u0111\u1ed5 b\u00ea t\u00f4ng li\u00ean t\u1ee5c l\u00e0 y\u1ebfu t\u1ed1 quan tr\u1ecdng.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" src=\"data:image\/gif;base64,R0lGODlhAQABAIAAAAAAAP\/\/\/yH5BAEAAAAALAAAAAABAAEAAAIBRAA7\" data-src=\"https:\/\/zhiformix.com\/wp-content\/uploads\/2026\/10\/Large-concrete-slab-pour-1024x576.webp\" alt=\"Large concrete slab pour avoiding cold joints\" class=\"wp-image-1245 lazyload\"><noscript><img decoding=\"async\" width=\"1024\" height=\"576\" src=\"https:\/\/zhiformix.com\/wp-content\/uploads\/2026\/10\/Large-concrete-slab-pour-1024x576.webp\" alt=\"Large concrete slab pour avoiding cold joints\" class=\"wp-image-1245\" srcset=\"https:\/\/zhiformix.com\/wp-content\/uploads\/2026\/10\/Large-concrete-slab-pour-1024x576.webp 1024w, https:\/\/zhiformix.com\/wp-content\/uploads\/2026\/10\/Large-concrete-slab-pour-300x169.webp 300w, https:\/\/zhiformix.com\/wp-content\/uploads\/2026\/10\/Large-concrete-slab-pour-768x432.webp 768w, https:\/\/zhiformix.com\/wp-content\/uploads\/2026\/10\/Large-concrete-slab-pour-1536x864.webp 1536w, https:\/\/zhiformix.com\/wp-content\/uploads\/2026\/10\/Large-concrete-slab-pour-18x10.webp 18w, https:\/\/zhiformix.com\/wp-content\/uploads\/2026\/10\/Large-concrete-slab-pour.webp 1890w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/noscript><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Ch\u1ea5t l\u00e0m ch\u1eadm \u0111\u00f4ng c\u1ee9ng c\u00f3 th\u1ec3 tr\u00ec ho\u00e3n qu\u00e1 tr\u00ecnh \u0111\u00f4ng c\u1ee9ng c\u1ee7a b\u00ea t\u00f4ng trong bao l\u00e2u?<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110i\u1ec1u n\u00e0y ph\u1ee5 thu\u1ed9c v\u00e0o lo\u1ea1i s\u1ea3n ph\u1ea9m v\u00e0 li\u1ec1u l\u01b0\u1ee3ng. Trong \u0111i\u1ec1u ki\u1ec7n ti\u00eau chu\u1ea9n, c\u00e1c ch\u1ea5t ph\u1ee5 gia ASTM Lo\u1ea1i B v\u00e0 Lo\u1ea1i D l\u00e0m ch\u1eadm qu\u00e1 tr\u00ecnh \u0111\u00f4ng k\u1ebft ban \u0111\u1ea7u \u00edt nh\u1ea5t 1 gi\u1edd. V\u1edbi li\u1ec1u l\u01b0\u1ee3ng cao h\u01a1n, c\u00f3 th\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c th\u1eddi gian ch\u1eadm l\u1ea1i l\u00ean \u0111\u1ebfn v\u00e0i gi\u1edd.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Ch\u1ea5t l\u00e0m ch\u1eadm \u0111\u00f4ng c\u1ee9ng c\u00f3 l\u00e0m gi\u1ea3m \u0111\u1ed9 b\u1ec1n c\u1ee7a b\u00ea t\u00f4ng kh\u00f4ng?<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Kh\u00f4ng. \u0110\u1ed9 b\u1ec1n l\u00e2u d\u00e0i s\u1ebd ph\u00e1t tri\u1ec3n b\u00ecnh th\u01b0\u1eddng sau khi b\u00ea t\u00f4ng \u0111\u00f4ng c\u1ee9ng. \u0110\u1ed9 b\u1ec1n ban \u0111\u1ea7u c\u00f3 th\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c mu\u1ed9n h\u01a1n m\u1ed9t ch\u00fat, nh\u01b0ng \u0111\u1ed9 b\u1ec1n thi\u1ebft k\u1ebf kh\u00f4ng b\u1ecb gi\u1ea3m.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>T\u00f4i c\u00f3 th\u1ec3 d\u00f9ng qu\u00e1 nhi\u1ec1u ch\u1ea5t l\u00e0m ch\u1eadm \u0111\u00f4ng k\u1ebft kh\u00f4ng?<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u00fang v\u1eady. Vi\u1ec7c s\u1eed d\u1ee5ng qu\u00e1 li\u1ec1u c\u00f3 th\u1ec3 g\u00e2y ra \u0111\u1ed9 tr\u1ec5 qu\u00e1 m\u1ee9c, m\u1ea5t \u0111\u1ed9 s\u1ee5t nhanh v\u00e0 n\u1ee9t do co ng\u00f3t d\u1ebbo. Lu\u00f4n tu\u00e2n th\u1ee7 h\u01b0\u1edbng d\u1eabn trong b\u1ea3ng d\u1eef li\u1ec7u s\u1ea3n ph\u1ea9m v\u00e0 x\u00e1c nh\u1eadn li\u1ec1u l\u01b0\u1ee3ng th\u00f4ng qua c\u00e1c m\u1ebb tr\u1ed9n th\u1eed nghi\u1ec7m.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>S\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa c\u00e1c ch\u1ea5t ph\u1ee5 gia lo\u1ea1i B, lo\u1ea1i D v\u00e0 lo\u1ea1i G l\u00e0 g\u00ec?<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Lo\u1ea1i B ch\u1ec9 l\u00e0m ch\u1eadm qu\u00e1 tr\u00ecnh \u0111\u00f4ng k\u1ebft. Lo\u1ea1i D v\u1eeba l\u00e0m gi\u1ea3m h\u00e0m l\u01b0\u1ee3ng n\u01b0\u1edbc v\u1eeba l\u00e0m ch\u1eadm qu\u00e1 tr\u00ecnh \u0111\u00f4ng k\u1ebft. Lo\u1ea1i G v\u1eeba gi\u00fap gi\u1ea3m h\u00e0m l\u01b0\u1ee3ng n\u01b0\u1edbc \u1edf m\u1ee9c cao v\u1eeba l\u00e0m ch\u1eadm qu\u00e1 tr\u00ecnh \u0111\u00f4ng k\u1ebft. C\u1ea3 ba lo\u1ea1i n\u00e0y \u0111\u1ec1u thu\u1ed9c ti\u00eau chu\u1ea9n ASTM C494.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>C\u00e1c thi\u1ebft b\u1ecb gi\u1ea3m t\u1ed1c c\u00f3 ho\u1ea1t \u0111\u1ed9ng \u0111\u01b0\u1ee3c trong th\u1eddi ti\u1ebft l\u1ea1nh kh\u00f4ng?<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Ch\u00fang c\u00f3 t\u00e1c d\u1ee5ng, nh\u01b0ng hi\u1ebfm khi c\u1ea7n d\u00f9ng trong th\u1eddi ti\u1ebft l\u1ea1nh. Nhi\u1ec7t \u0111\u1ed9 th\u1ea5p v\u1ed1n \u0111\u00e3 l\u00e0m ch\u1eadm qu\u00e1 tr\u00ecnh \u0111\u00f4ng c\u1ee9ng. Ch\u1ea5t l\u00e0m ch\u1eadm \u0111\u00f4ng c\u1ee9ng ch\u1ee7 y\u1ebfu l\u00e0 gi\u1ea3i ph\u00e1p d\u00e0nh cho th\u1eddi ti\u1ebft n\u00f3ng v\u00e0 c\u00e1c chuy\u1ebfn v\u1eadn chuy\u1ec3n \u0111\u01b0\u1eddng d\u00e0i.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" src=\"data:image\/gif;base64,R0lGODlhAQABAIAAAAAAAP\/\/\/yH5BAEAAAAALAAAAAABAAEAAAIBRAA7\" data-src=\"https:\/\/zhiformix.com\/wp-content\/uploads\/2026\/10\/zhiwei-construction-chemical-additives-support-1024x576.webp\" alt=\"Zhiwei technical support for construction chemical additives\" class=\"wp-image-1242 lazyload\"><noscript><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"576\" src=\"https:\/\/zhiformix.com\/wp-content\/uploads\/2026\/10\/zhiwei-construction-chemical-additives-support-1024x576.webp\" alt=\"Zhiwei technical support for construction chemical additives\" class=\"wp-image-1242\" srcset=\"https:\/\/zhiformix.com\/wp-content\/uploads\/2026\/10\/zhiwei-construction-chemical-additives-support-1024x576.webp 1024w, https:\/\/zhiformix.com\/wp-content\/uploads\/2026\/10\/zhiwei-construction-chemical-additives-support-300x169.webp 300w, https:\/\/zhiformix.com\/wp-content\/uploads\/2026\/10\/zhiwei-construction-chemical-additives-support-768x432.webp 768w, https:\/\/zhiformix.com\/wp-content\/uploads\/2026\/10\/zhiwei-construction-chemical-additives-support-1536x864.webp 1536w, https:\/\/zhiformix.com\/wp-content\/uploads\/2026\/10\/zhiwei-construction-chemical-additives-support-18x10.webp 18w, https:\/\/zhiformix.com\/wp-content\/uploads\/2026\/10\/zhiwei-construction-chemical-additives-support.webp 1890w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/noscript><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>K\u1ebft lu\u1eadn<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1ee5c \u0111\u00edch c\u1ee7a ch\u1ea5t l\u00e0m ch\u1eadm \u0111\u00f4ng c\u1ee9ng trong b\u00ea t\u00f4ng r\u1ea5t \u0111\u01a1n gi\u1ea3n: <strong>\u0111i\u1ec1u \u0111\u00f3 gi\u00fap k\u00e9o d\u00e0i th\u1eddi gian<\/strong>. S\u1ea3n ph\u1ea9m n\u00e0y gi\u00fap tr\u00ec ho\u00e3n qu\u00e1 tr\u00ecnh \u0111\u00f4ng c\u1ee9ng, nh\u1edd \u0111\u00f3 c\u00e1c \u0111\u1ed9i thi c\u00f4ng c\u00f3 th\u1ec3 v\u1eadn chuy\u1ec3n, \u0111\u1ed5 v\u00e0 ho\u00e0n thi\u1ec7n b\u00ea t\u00f4ng trong \u0111i\u1ec1u ki\u1ec7n kh\u00f3 kh\u0103n. S\u1ea3n ph\u1ea9m n\u00e0y gi\u00fap ch\u1ed1ng ch\u1ecdi v\u1edbi th\u1eddi ti\u1ebft n\u1eafng n\u00f3ng, ch\u1ecbu \u0111\u01b0\u1ee3c qu\u00e3ng \u0111\u01b0\u1eddng v\u1eadn chuy\u1ec3n d\u00e0i, ng\u0103n ng\u1eeba hi\u1ec7n t\u01b0\u1ee3ng m\u1ed1i n\u1ed1i l\u1ea1nh trong c\u00e1c c\u00f4ng tr\u00ecnh \u0111\u1ed5 b\u00ea t\u00f4ng quy m\u00f4 l\u1edbn, n\u00e2ng cao ch\u1ea5t l\u01b0\u1ee3ng b\u1ec1 m\u1eb7t ho\u00e0n thi\u1ec7n v\u00e0 gi\u1ea3m thi\u1ec3u s\u1ef1 t\u00edch t\u1ee5 nhi\u1ec7t trong b\u00ea t\u00f4ng kh\u1ed1i l\u01b0\u1ee3ng l\u1edbn.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ch\u1ea5t l\u00e0m ch\u1eadm ph\u1ea3n \u1ee9ng ho\u1ea1t \u0111\u1ed9ng b\u1eb1ng c\u00e1ch t\u1ea1m th\u1eddi l\u00e0m ch\u1eadm qu\u00e1 tr\u00ecnh th\u1ee7y h\u00f3a xi m\u0103ng, v\u00e0 ch\u00fang s\u1ebd ng\u1eebng t\u00e1c d\u1ee5ng sau khi th\u1eddi gian thi c\u00f4ng \u0111\u00e3 h\u1ebft. Qu\u00e1 tr\u00ecnh ph\u00e1t tri\u1ec3n c\u01b0\u1eddng \u0111\u1ed9 sau \u0111\u00f3 s\u1ebd di\u1ec5n ra b\u00ecnh th\u01b0\u1eddng. H\u00e3y l\u1ef1a ch\u1ecdn gi\u1eefa lignosulfonat, axit hydroxycarboxylic, \u0111\u01b0\u1eddng ho\u1eb7c photphat, \u0111\u1ecbnh l\u01b0\u1ee3ng c\u1ea9n th\u1eadn th\u00f4ng qua c\u00e1c h\u1ed7n h\u1ee3p th\u1eed nghi\u1ec7m v\u00e0 tu\u00e2n th\u1ee7 y\u00eau c\u1ea7u v\u1ec1 nhi\u1ec7t \u0111\u1ed9. N\u1ebfu l\u00e0m \u0111\u00fang nh\u01b0 v\u1eady, ch\u1ea5t l\u00e0m ch\u1eadm s\u1ebd tr\u1edf th\u00e0nh m\u1ed9t trong nh\u1eefng c\u00f4ng c\u1ee5 hi\u1ec7u qu\u1ea3 nh\u1ea5t v\u1ec1 m\u1eb7t chi ph\u00ed trong d\u1ef1 \u00e1n c\u1ee7a b\u1ea1n.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>","protected":false},"excerpt":{"rendered":"<p>Concrete has a deadline. From the moment water touches cement, the clock starts. In cool weather with a nearby plant, the normal setting time is enough. In hot weather, on a long haul, or on a massive pour, it is not. The concrete stiffens before the crew finishes, and the result is cold joints, poor [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":1244,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[36],"tags":[41,37,39,40,38],"class_list":["post-1241","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-retarder","tag-concrete-retarder","tag-concrete-setting-time","tag-purpose-of-retarder-in-concrete","tag-retarding-admixture-concrete","tag-why-retard-concrete"],"_links":{"self":[{"href":"https:\/\/zhiformix.com\/vi\/wp-json\/wp\/v2\/posts\/1241","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/zhiformix.com\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/zhiformix.com\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/zhiformix.com\/vi\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/zhiformix.com\/vi\/wp-json\/wp\/v2\/comments?post=1241"}],"version-history":[{"count":2,"href":"https:\/\/zhiformix.com\/vi\/wp-json\/wp\/v2\/posts\/1241\/revisions"}],"predecessor-version":[{"id":1247,"href":"https:\/\/zhiformix.com\/vi\/wp-json\/wp\/v2\/posts\/1241\/revisions\/1247"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/zhiformix.com\/vi\/wp-json\/wp\/v2\/media\/1244"}],"wp:attachment":[{"href":"https:\/\/zhiformix.com\/vi\/wp-json\/wp\/v2\/media?parent=1241"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/zhiformix.com\/vi\/wp-json\/wp\/v2\/categories?post=1241"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/zhiformix.com\/vi\/wp-json\/wp\/v2\/tags?post=1241"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}