{"id":7850,"date":"2021-06-07T04:58:52","date_gmt":"2021-06-07T04:58:52","guid":{"rendered":"https:\/\/thuvienxaydung.com.vn\/?p=7850"},"modified":"2021-06-07T04:59:59","modified_gmt":"2021-06-07T04:59:59","slug":"tieu-chuan-viet-nam-tcvn-75702006-ve-cot-lieu-cho-be-tong-va-vua-yeu-cau-ky-thuat","status":"publish","type":"post","link":"https:\/\/tailieuxaydung.net\/?p=7850","title":{"rendered":"Ti\u00eau chu\u1ea9n Vi\u1ec7t Nam TCVN 7570:2006 v\u1ec1 c\u1ed1t li\u1ec7u cho b\u00ea t\u00f4ng v\u00e0 v\u1eefa \u2013 Y\u00eau c\u1ea7u k\u1ef9 thu\u1eadt"},"content":{"rendered":"

N\u1ed9i dung to\u00e0n v\u0103n Ti\u00eau chu\u1ea9n Vi\u1ec7t Nam TCVN 7570:2006 v\u1ec1 c\u1ed1t li\u1ec7u cho b\u00ea t\u00f4ng v\u00e0 v\u1eefa – y\u00eau c\u1ea7u k\u1ef9 thu\u1eadt do B\u1ed9 Khoa h\u1ecdc v\u00e0 C\u00f4ng ngh\u1ec7 ban h\u00e0nh<\/h2>\n
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TI\u00caU CHU\u1ea8N VI\u1ec6T\u00a0<\/b>NAM<\/b><\/p>\n

TCVN 7570:2006<\/b><\/p>\n

C\u1ed0T LI\u1ec6U CHO B\u00ca T\u00d4NG V\u00c0 V\u1eeeA ( Y\u00caU C\u1ea6U K\u1ef8 THU\u1eacT<\/p>\n

Aggregates for concrete and mortar\u00a0<\/i>–<\/i>\u00a0Specifications<\/i><\/p>\n

\u00a0<\/b><\/p>\n

L\u1eddi n\u00f3i \u0111\u1ea7u<\/b><\/p>\n

TCVN 7570 : 2006<\/b>\u00a0thay th\u1ebf cho TCVN 1770 : 1986 v\u00e0 TCVN 1771 : 1987.<\/p>\n

TCVN 7570 : 2006<\/b>\u00a0do Ti\u1ec3u ban k\u1ef9 thu\u1eadt Ti\u00eau chu\u1ea9n TCVN\/TC 71\/SC3\u00a0C\u1ed1t li\u1ec7u cho b\u00ea t\u00f4ng\u00a0<\/i>ho\u00e0n thi\u1ec7n tr\u00ean c\u01a1 s\u1edf d\u1ef1 th\u1ea3o c\u1ee7a Vi\u1ec7n Khoa h\u1ecdc C\u00f4ng ngh\u1ec7 X\u00e2y d\u1ef1ng, B\u1ed9 X\u00e2y d\u1ef1ng \u0111\u1ec1 ngh\u1ecb, T\u1ed5ng C\u1ee5c Ti\u00eau chu\u1ea9n \u0110o l\u01b0\u1eddng Ch\u1ea5t l\u01b0\u1ee3ng x\u00e9t duy\u1ec7t, B\u1ed9 Khoa h\u1ecdc v\u00e0 C\u00f4ng ngh\u1ec7 ban h\u00e0nh.<\/p>\n

\u00a0<\/span><\/b><\/p>\n

TCVN 7570 : 2006<\/span><\/b><\/p>\n

C\u1ed1t li\u1ec7u cho b\u00ea t\u00f4ng v\u00e0 v\u1eefa\u00a0<\/span><\/b>–<\/span><\/b>\u00a0Y\u00eau c\u1ea7u k\u1ef9 thu\u1eadt<\/span><\/b><\/p>\n

Aggregates for concrete and mortar\u00a0<\/span><\/i>–<\/span><\/i>\u00a0Specifications<\/span><\/i><\/p>\n

1. Ph\u1ea1m vi \u00e1p d\u1ee5ng<\/b><\/p>\n

Ti\u00eau chu\u1ea9n n\u00e0y quy \u0111\u1ecbnh c\u00e1c y\u00eau c\u1ea7u k\u1ef9 thu\u1eadt \u0111\u1ed1i v\u1edbi c\u1ed1t li\u1ec7u nh\u1ecf (c\u00e1t t\u1ef1 nhi\u00ean) v\u00e0 c\u1ed1t li\u1ec7u l\u1edbn, c\u00f3 c\u1ea5u tr\u00fac \u0111\u1eb7c ch\u1eafc d\u00f9ng ch\u1ebf t\u1ea1o b\u00ea t\u00f4ng v\u00e0 v\u1eefa xi m\u0103ng th\u00f4ng th\u01b0\u1eddng.<\/p>\n

Ti\u00eau chu\u1ea9n n\u00e0y kh\u00f4ng \u00e1p d\u1ee5ng cho c\u00e1c lo\u1ea1i c\u1ed1t li\u1ec7u d\u00f9ng ch\u1ebf t\u1ea1o b\u00ea t\u00f4ng v\u00e0 v\u1eefa xi m\u0103ng \u0111\u1eb7c bi\u1ec7t (b\u00ea t\u00f4ng v\u00e0 v\u1eefa nh\u1eb9, b\u00ea t\u00f4ng v\u00e0 v\u1eefa ch\u1ed1ng \u0103n m\u00f2n, b\u00ea t\u00f4ng kh\u1ed1i l\u1edbn \u2026).<\/p>\n

2. T\u00e0i li\u1ec7u vi\u1ec7n d\u1eabn<\/span><\/b><\/p>\n

TCVN 7572-1 : 2006 C\u1ed1t li\u1ec7u cho b\u00ea t\u00f4ng v\u00e0 v\u1eefa\u00a0–\u00a0Ph\u01b0\u01a1ng ph\u00e1p th\u1eed\u00a0–\u00a0Ph\u1ea7n 1: L\u1ea5y m\u1eabu.<\/p>\n

TCVN 7572-2 : 2006 C\u1ed1t li\u1ec7u cho b\u00ea t\u00f4ng v\u00e0 v\u1eefa\u00a0–\u00a0Ph\u01b0\u01a1ng ph\u00e1p th\u1eed\u00a0–\u00a0Ph\u1ea7n 2: X\u00e1c \u0111\u1ecbnh th\u00e0nh ph\u1ea7n h\u1ea1t.<\/p>\n

<\/div>\n

TCVN 7572-3 : 2006 C\u1ed1t li\u1ec7u cho b\u00ea t\u00f4ng v\u00e0 v\u1eefa\u00a0–\u00a0Ph\u01b0\u01a1ng ph\u00e1p th\u1eed\u00a0–\u00a0Ph\u1ea7n 3: H\u01b0\u1edbng d\u1eabn x\u00e1c \u0111\u1ecbnh th\u00e0nh ph\u1ea7n th\u1ea1ch h\u1ecdc.<\/p>\n

<\/div>\n

TCVN 7572-4 : 2006 C\u1ed1t li\u1ec7u cho b\u00ea t\u00f4ng v\u00e0 v\u1eefa\u00a0–\u00a0Ph\u01b0\u01a1ng ph\u00e1p th\u1eed\u00a0–\u00a0Ph\u1ea7n 4: X\u00e1c \u0111\u1ecbnh kh\u1ed1i l\u01b0\u1ee3ng ri\u00eang, kh\u1ed1i l\u01b0\u1ee3ng th\u1ec3 t\u00edch v\u00e0 \u0111\u1ed9 h\u00fat n\u01b0\u1edbc.<\/p>\n

TCVN 7572-5 : 2006 C\u1ed1t li\u1ec7u cho b\u00ea t\u00f4ng v\u00e0 v\u1eefa\u00a0–\u00a0Ph\u01b0\u01a1ng ph\u00e1p th\u1eed\u00a0–\u00a0Ph\u1ea7n 5: X\u00e1c \u0111\u1ecbnh kh\u1ed1i l\u01b0\u1ee3ng ri\u00eang, kh\u1ed1i l\u01b0\u1ee3ng th\u1ec3 t\u00edch v\u00e0 \u0111\u1ed9 h\u00fat n\u01b0\u1edbc c\u1ee7a \u0111\u00e1 g\u1ed1c v\u00e0 h\u1ea1t c\u1ed1t li\u1ec7u l\u1edbn.<\/p>\n

TCVN 7572-6 : 2006 C\u1ed1t li\u1ec7u cho b\u00ea t\u00f4ng v\u00e0 v\u1eefa\u00a0–\u00a0Ph\u01b0\u01a1ng ph\u00e1p th\u1eed\u00a0–\u00a0Ph\u1ea7n 6: X\u00e1c \u0111\u1ecbnh kh\u1ed1i l\u01b0\u1ee3ng th\u1ec3 t\u00edch x\u1ed1p v\u00e0 \u0111\u1ed9 h\u1ed5ng.<\/p>\n

TCVN 7572-7 : 2006 C\u1ed1t li\u1ec7u cho b\u00ea t\u00f4ng v\u00e0 v\u1eefa\u00a0–\u00a0Ph\u01b0\u01a1ng ph\u00e1p th\u1eed\u00a0–\u00a0Ph\u1ea7n 7: X\u00e1c \u0111\u1ecbnh \u0111\u1ed9 \u1ea9m.<\/p>\n

TCVN 7572-8 : 2006 C\u1ed1t li\u1ec7u cho b\u00ea t\u00f4ng v\u00e0 v\u1eefa\u00a0–\u00a0Ph\u01b0\u01a1ng ph\u00e1p th\u1eed\u00a0–\u00a0Ph\u1ea7n 8: X\u00e1c \u0111\u1ecbnh h\u00e0m l\u01b0\u1ee3ng b\u00f9n, b\u1ee5i, s\u00e9t trong c\u1ed1t li\u1ec7u v\u00e0 h\u00e0m l\u01b0\u1ee3ng s\u00e9t c\u1ee5c trong c\u1ed1t li\u1ec7u nh\u1ecf.<\/p>\n

TCVN 7572-9 : 2006 C\u1ed1t li\u1ec7u cho b\u00ea t\u00f4ng v\u00e0 v\u1eefa\u00a0–\u00a0Ph\u01b0\u01a1ng ph\u00e1p th\u1eed\u00a0–\u00a0Ph\u1ea7n 9: X\u00e1c \u0111\u1ecbnh t\u1ea1p ch\u1ea5t h\u1eefu c\u01a1.<\/p>\n

TCVN 7572-10 : 2006C\u1ed1t li\u1ec7u cho b\u00ea t\u00f4ng v\u00e0 v\u1eefa\u00a0–\u00a0Ph\u01b0\u01a1ng ph\u00e1p th\u1eed\u00a0–\u00a0Ph\u1ea7n 10: X\u00e1c \u0111\u1ecbnh c\u01b0\u1eddng \u0111\u1ed9 v\u00e0 h\u1ec7 s\u1ed1 ho\u00e1 m\u1ec1m c\u1ee7a \u0111\u00e1 g\u1ed1c.<\/p>\n

TCVN 7572-11 : 2006C\u1ed1t li\u1ec7u cho b\u00ea t\u00f4ng v\u00e0 v\u1eefa\u00a0–\u00a0Ph\u01b0\u01a1ng ph\u00e1p th\u1eed\u00a0–\u00a0Ph\u1ea7n 11: X\u00e1c \u0111\u1ecbnh \u0111\u1ed9 n\u00e9n d\u1eadp v\u00e0 h\u1ec7 s\u1ed1 ho\u00e1 m\u1ec1m c\u1ee7a c\u1ed1t li\u1ec7u l\u1edbn.<\/p>\n

TCVN 7572-12 : 2006 C\u1ed1t li\u1ec7u cho b\u00ea t\u00f4ng v\u00e0 v\u1eefa\u00a0–\u00a0Ph\u01b0\u01a1ng ph\u00e1p th\u1eed\u00a0–\u00a0Ph\u1ea7n 12: X\u00e1c \u0111\u1ecbnh \u0111\u1ed9 hao m\u00f2n khi va \u0111\u1eadp c\u1ee7a c\u1ed1t li\u1ec7u l\u1edbn trong m\u00e1y Los Angeles.<\/p>\n

TCVN 7572-13 : 2006 C\u1ed1t li\u1ec7u cho b\u00ea t\u00f4ng v\u00e0 v\u1eefa\u00a0–\u00a0Ph\u01b0\u01a1ng ph\u00e1p th\u1eed\u00a0–\u00a0Ph\u1ea7n 13: X\u00e1c \u0111\u1ecbnh h\u00e0m l\u01b0\u1ee3ng h\u1ea1t thoi d\u1eb9t trong c\u1ed1t li\u1ec7u l\u1edbn.<\/p>\n

TCVN 7572-14 : 2006 C\u1ed1t li\u1ec7u cho b\u00ea t\u00f4ng v\u00e0 v\u1eefa\u00a0–\u00a0Ph\u01b0\u01a1ng ph\u00e1p th\u1eed\u00a0–\u00a0Ph\u1ea7n 14: X\u00e1c \u0111\u1ecbnh kh\u1ea3 n\u0103ng ph\u1ea3n \u1ee9ng ki\u1ec1m \u2013 silic.<\/p>\n

TCVN 7572-15 : 2006 C\u1ed1t li\u1ec7u cho b\u00ea t\u00f4ng v\u00e0 v\u1eefa\u00a0–\u00a0Ph\u01b0\u01a1ng ph\u00e1p th\u1eed\u00a0–\u00a0Ph\u1ea7n 15: X\u00e1c \u0111\u1ecbnh h\u00e0m l\u01b0\u1ee3ng clorua.<\/p>\n

TCXDVN 356 : 2005 K\u1ebft c\u1ea5u b\u00ea t\u00f4ng v\u00e0 b\u00ea t\u00f4ng c\u1ed1t th\u00e9p\u00a0–\u00a0Ti\u00eau chu\u1ea9n thi\u1ebft k\u1ebf.<\/p>\n

3. Thu\u1eadt ng\u1eef v\u00e0 \u0111\u1ecbnh ngh\u0129a<\/span><\/b><\/b><\/p>\n

3.1<\/span><\/b><\/p>\n

C\u1ed1t li\u1ec7u\u00a0<\/span><\/b>(aggregate)<\/span><\/p>\n

C\u00e1c v\u1eadt li\u1ec7u r\u1eddi ngu\u1ed3n g\u1ed1c t\u1ef1 nhi\u00ean ho\u1eb7c nh\u00e2n t\u1ea1o c\u00f3 th\u00e0nh ph\u1ea7n h\u1ea1t x\u00e1c \u0111\u1ecbnh, khi nh\u00e0o tr\u1ed9n v\u1edbi
\nxi m\u0103ng v\u00e0 n\u01b0\u1edbc, t\u1ea1o th\u00e0nh b\u00ea t\u00f4ng ho\u1eb7c v\u1eefa. Theo k\u00edch th\u01b0\u1edbc h\u1ea1t, c\u1ed1t li\u1ec7u \u0111\u01b0\u1ee3c ph\u00e2n ra c\u1ed1t li\u1ec7u nh\u1ecf v\u00e0 c\u1ed1t li\u1ec7u l\u1edbn.<\/span><\/p>\n

3.2<\/span><\/b><\/p>\n

C\u1ed1t li\u1ec7u nh\u1ecf\u00a0<\/span><\/b>(fine aggregate)<\/span><\/p>\n

H\u1ed7n h\u1ee3p c\u00e1c h\u1ea1t c\u1ed1t li\u1ec7u k\u00edch th\u01b0\u1edbc ch\u1ee7 y\u1ebfu t\u1eeb 0,14 mm \u0111\u1ebfn 5 mm. C\u1ed1t li\u1ec7u nh\u1ecf c\u00f3 th\u1ec3 l\u00e0 c\u00e1t t\u1ef1 nhi\u00ean, c\u00e1t nghi\u1ec1n v\u00e0 h\u1ed7n h\u1ee3p t\u1eeb c\u00e1t t\u1ef1 nhi\u00ean v\u00e0 c\u00e1t nghi\u1ec1n.<\/span><\/p>\n

3.2.1<\/span><\/b><\/p>\n

C\u00e1t t\u1ef1 nhi\u00ean\u00a0<\/span><\/b>(natural sand)<\/span><\/p>\n

H\u1ed7n h\u1ee3p c\u00e1c h\u1ea1t c\u1ed1t li\u1ec7u nh\u1ecf \u0111\u01b0\u1ee3c h\u00ecnh th\u00e0nh do qu\u00e1 tr\u00ecnh phong ho\u00e1 c\u1ee7a c\u00e1c \u0111\u00e1 t\u1ef1 nhi\u00ean. C\u00e1t t\u1ef1 nhi\u00ean sau \u0111\u00e2y g\u1ecdi l\u00e0 c\u00e1t.<\/span><\/p>\n

3.2.2<\/span><\/b><\/p>\n

C\u00e1t nghi\u1ec1n\u00a0<\/span><\/b>(crushed rock sand)<\/span><\/p>\n

H\u1ed7n h\u1ee3p c\u00e1c h\u1ea1t c\u1ed1t li\u1ec7u k\u00edch th\u01b0\u1edbc nh\u1ecf h\u01a1n 5 mm thu \u0111\u01b0\u1ee3c do \u0111\u1eadp v\u00e0 ho\u1eb7c nghi\u1ec1n t\u1eeb \u0111\u00e1.<\/span><\/p>\n

3.2.3<\/span><\/b><\/p>\n

M\u00f4\u0111un \u0111\u1ed9 l\u1edbn c\u1ee7a c\u00e1t (<\/span><\/b>fineness modulus of sand)<\/b><\/span><\/p>\n

Ch\u1ec9 ti\u00eau danh ngh\u0129a \u0111\u00e1nh gi\u00e1 m\u1ee9c \u0111\u1ed9 th\u00f4 ho\u1eb7c<\/span><\/p>\n

m\u1ecbn c\u1ee7a h\u1ea1t c\u00e1t. M\u00f4 \u0111un \u0111\u1ed9 l\u1edbn c\u1ee7a c\u00e1t \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh b\u1eb1ng c\u00e1ch c\u1ed9ng c\u00e1c ph\u1ea7n tr\u0103m l\u01b0\u1ee3ng s\u00f3t t\u00edch lu\u1ef9 tr\u00ean c\u00e1c s\u00e0ng 2,5 mm; 1,25 mm; 630\u00a0<\/span>m<\/span>m; 315\u00a0<\/span>m<\/span>m; 140\u00a0<\/span>m<\/span>m v\u00e0 chia cho 100.<\/span><\/p>\n

3.3<\/span><\/b><\/p>\n

C\u1ed1t li\u1ec7u l\u1edbn (coarse aggregate)<\/span><\/b><\/p>\n

H\u1ed7n h\u1ee3p c\u00e1c h\u1ea1t c\u1ed1t li\u1ec7u c\u00f3 k\u00edch th\u01b0\u1edbc t\u1eeb 5 mm \u0111\u1ebfn 70 mm. C\u1ed1t li\u1ec7u l\u1edbn c\u00f3 th\u1ec3 l\u00e0 \u0111\u00e1 d\u0103m, s\u1ecfi, s\u1ecfi d\u0103m (\u0111\u1eadp ho\u1eb7c nghi\u1ec1n t\u1eeb s\u1ecfi) v\u00e0 h\u1ed7n h\u1ee3p t\u1eeb \u0111\u00e1 d\u0103m v\u00e0 s\u1ecfi hay s\u1ecfi d\u0103m.<\/span><\/p>\n

3.3.1<\/span><\/b><\/p>\n

S\u1ecfi\u00a0<\/span><\/b>(gravel)<\/span><\/p>\n

C\u1ed1t li\u1ec7u l\u1edbn \u0111\u01b0\u1ee3c h\u00ecnh th\u00e0nh do qu\u00e1 tr\u00ecnh phong ho\u00e1 c\u1ee7a \u0111\u00e1 t\u1ef1 nhi\u00ean.<\/span><\/p>\n

3.3.2<\/span><\/b><\/p>\n

\u0110\u00e1 d\u0103m\u00a0<\/span><\/b>(crushed rock)<\/span><\/p>\n

C\u1ed1t li\u1ec7u l\u1edbn \u0111\u01b0\u1ee3c s\u1ea3n xu\u1ea5t b\u1eb1ng c\u00e1ch \u0111\u1eadp v\u00e0\/ho\u1eb7c nghi\u1ec1n \u0111\u00e1.<\/span><\/p>\n

3.3.3<\/span><\/b><\/p>\n

S\u1ecfi d\u0103m\u00a0<\/span><\/b>(crushed gravel)<\/span><\/p>\n

C\u1ed1t li\u1ec7u l\u1edbn \u0111\u01b0\u1ee3c s\u1ea3n xu\u1ea5t b\u1eb1ng c\u00e1ch \u0111\u1eadp v\u00e0\/ho\u1eb7c nghi\u1ec1n cu\u1ed9i, s\u1ecfi k\u00edch th\u01b0\u1edbc l\u1edbn.<\/span><\/p>\n

3.3.4<\/span><\/b><\/p>\n

K\u00edch th\u01b0\u1edbc h\u1ea1t l\u1edbn nh\u1ea5t c\u1ee7a c\u1ed1t li\u1ec7u l\u1edbn (Dmax<\/sub>)\u00a0<\/span><\/b>(maximum particle size)<\/span><\/p>\n

K\u00edch th\u01b0\u1edbc danh ngh\u0129a t\u00ednh theo k\u00edch th\u01b0\u1edbc m\u1eaft s\u00e0ng nh\u1ecf nh\u1ea5t m\u00e0 kh\u00f4ng \u00edt h\u01a1n 90 % kh\u1ed1i l\u01b0\u1ee3ng h\u1ea1t c\u1ed1t li\u1ec7u l\u1ecdt qua.<\/span><\/p>\n

3.3.5<\/span><\/b><\/p>\n

K\u00edch th\u01b0\u1edbc h\u1ea1t nh\u1ecf nh\u1ea5t c\u1ee7a c\u1ed1t li\u1ec7u l\u1edbn (Dmin<\/sub>)\u00a0<\/span><\/b>(minimum particle size)<\/span><\/p>\n

K\u00edch th\u01b0\u1edbc danh ngh\u0129a t\u00ednh theo k\u00edch th\u01b0\u1edbc m\u1eaft s\u00e0ng l\u1edbn nh\u1ea5t m\u00e0 kh\u00f4ng nhi\u1ec1u h\u01a1n 10 % kh\u1ed1i l\u01b0\u1ee3ng h\u1ea1t c\u1ed1t li\u1ec7u l\u1ecdt qua.<\/span><\/p>\n

3.3.6<\/span><\/b><\/p>\n

H\u1ea1t thoi d\u1eb9t c\u1ee7a c\u1ed1t li\u1ec7u l\u1edbn\u00a0<\/span><\/b>(elongation and flakiness index of coarse aggregate)<\/span><\/p>\n

H\u1ea1t c\u00f3 k\u00edch th\u01b0\u1edbc c\u1ea1nh nh\u1ecf nh\u1ea5t nh\u1ecf h\u01a1n 1\/3 c\u1ea1nh d\u00e0i.<\/span><\/p>\n

3.4<\/span><\/b><\/p>\n

Th\u00e0nh ph\u1ea7n h\u1ea1t c\u1ee7a c\u1ed1t li\u1ec7u\u00a0<\/span><\/b>(particle size distribution)<\/span><\/p>\n

T\u1ef7 l\u1ec7 ph\u1ea7n tr\u0103m kh\u1ed1i l\u01b0\u1ee3ng c\u00e1c h\u1ea1t c\u00f3 k\u00edch th\u01b0\u1edbc x\u00e1c \u0111\u1ecbnh.<\/span><\/p>\n

3.5<\/span><\/b><\/p>\n

T\u1ea1p ch\u1ea5t h\u1eefu c\u01a1\u00a0<\/span><\/b>(organic impurities)<\/span><\/p>\n

C\u00e1c ch\u1ea5t h\u1eefu c\u01a1 trong c\u1ed1t li\u1ec7u c\u00f3 th\u1ec3 \u1ea3nh h\u01b0\u1edfng x\u1ea5u \u0111\u1ebfn t\u00ednh ch\u1ea5t c\u1ee7a b\u00ea t\u00f4ng ho\u1eb7c v\u1eefa
\nxi m\u0103ng.<\/span><\/p>\n

3.6<\/span><\/b><\/p>\n

M\u00e0u chu\u1ea9n\u00a0<\/span><\/b>(standard colors)<\/span><\/p>\n

M\u00e0u qui \u01b0\u1edbc d\u00f9ng \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh \u0111\u1ecbnh t\u00ednh t\u1ea1p ch\u1ea5t h\u1eefu c\u01a1 trong c\u1ed1t li\u1ec7u.<\/span><\/p>\n

3.7 C\u1ea5p b\u00ea t\u00f4ng theo c\u01b0\u1eddng \u0111\u1ed9 ch\u1ecbu n\u00e9n\u00a0<\/span><\/b>(grade of concrete)<\/span><\/p>\n

<\/div>\n

Gi\u00e1 tr\u1ecb c\u01b0\u1eddng \u0111\u1ed9 v\u1edbi x\u00e1c su\u1ea5t b\u1ea3o \u0111\u1ea3m 0,95 khi n\u00e9n c\u00e1c m\u1eabu b\u00ea t\u00f4ng l\u1eadp ph\u01b0\u01a1ng chu\u1ea9n.<\/span><\/p>\n

4. Y\u00eau c\u1ea7u k\u1ef9 thu\u1eadt<\/span><\/b><\/p>\n

4.1 C\u00e1t<\/span><\/b><\/p>\n

4.1.1\u00a0<\/span><\/b>Theo gi\u00e1 tr\u1ecb m\u00f4\u0111un \u0111\u1ed9 l\u1edbn, c\u00e1t d\u00f9ng cho b\u00ea t\u00f4ng v\u00e0 v\u1eefa \u0111\u01b0\u1ee3c ph\u00e2n ra hai nh\u00f3m ch\u00ednh:<\/span><\/p>\n

– C\u00e1t th\u00f4 khi m\u00f4\u0111un \u0111\u1ed9 l\u1edbn trong kho\u1ea3ng t\u1eeb l\u1edbn h\u01a1n 2,0 \u0111\u1ebfn 3,3;<\/p>\n

– C\u00e1t m\u1ecbn khi m\u00f4\u0111un \u0111\u1ed9 l\u1edbn trong kho\u1ea3ng t\u1eeb 0,7 \u0111\u1ebfn 2,0.<\/p>\n

Th\u00e0nh ph\u1ea7n h\u1ea1t c\u1ee7a c\u00e1t, bi\u1ec3u th\u1ecb qua l\u01b0\u1ee3ng s\u00f3t t\u00edch lu\u1ef9 tr\u00ean s\u00e0ng, n\u1eb1m trong ph\u1ea1m vi quy \u0111\u1ecbnh trong B\u1ea3ng 1.<\/span><\/p>\n

4.1.2\u00a0<\/span><\/b>C\u00e1t th\u00f4 c\u00f3 th\u00e0nh ph\u1ea7n h\u1ea1t nh\u01b0 quy \u0111\u1ecbnh trong B\u1ea3ng 1 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 ch\u1ebf t\u1ea1o b\u00ea t\u00f4ng v\u00e0 v\u1eefa t\u1ea5t c\u1ea3 c\u00e1c c\u1ea5p b\u00ea t\u00f4ng v\u00e0 m\u00e1c v\u1eefa.<\/span><\/p>\n

B\u1ea3ng 1 – Th\u00e0nh ph\u1ea7n h\u1ea1t c\u1ee7a c\u00e1t<\/span><\/b><\/p>\n\n\n\n\n\n\n\n\n\n\n
\n

K\u00edch th\u01b0\u1edbc l\u1ed7 s\u00e0ng<\/b><\/p>\n<\/td>\n

\n

L\u01b0\u1ee3ng s\u00f3t t\u00edch lu\u1ef9 tr\u00ean s\u00e0ng,\u00a0<\/b>% kh\u1ed1i l\u01b0\u1ee3ng<\/p>\n<\/td>\n<\/tr>\n

\n

C\u00e1t th\u00f4<\/b><\/p>\n<\/td>\n

\n

C\u00e1t m\u1ecbn<\/b><\/p>\n<\/td>\n<\/tr>\n

\n

2,5 mm<\/p>\n<\/td>\n

\n

T\u1eeb 0 \u0111\u1ebfn 20<\/p>\n<\/td>\n

\n

0<\/p>\n<\/td>\n<\/tr>\n

\n

1,25 mm<\/p>\n<\/td>\n

\n

T\u1eeb 15 \u0111\u1ebfn 45<\/p>\n<\/td>\n

\n

T\u1eeb 0 \u0111\u1ebfn 15<\/p>\n<\/td>\n<\/tr>\n

\n

630\u00a0mm<\/p>\n<\/td>\n

\n

T\u1eeb 35 \u0111\u1ebfn 70<\/p>\n<\/td>\n

\n

T\u1eeb 0 \u0111\u1ebfn 35<\/p>\n<\/td>\n<\/tr>\n

\n

315\u00a0mm<\/p>\n<\/td>\n

\n

T\u1eeb 65 \u0111\u1ebfn 90<\/p>\n<\/td>\n

\n

T\u1eeb 5 \u0111\u1ebfn 65<\/p>\n<\/td>\n<\/tr>\n

\n

140\u00a0mm<\/p>\n<\/td>\n

\n

T\u1eeb 90 \u0111\u1ebfn100<\/p>\n<\/td>\n

\n

T\u1eeb 65 \u0111\u1ebfn 90<\/p>\n<\/td>\n<\/tr>\n

\n

L\u01b0\u1ee3ng qua s\u00e0ng 140\u00a0mm, kh\u00f4ng l\u1edbn h\u01a1n<\/p>\n<\/td>\n

\n

10<\/p>\n<\/td>\n

\n

35<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

4.1.3<\/span><\/b>\u00a0C\u00e1t m\u1ecbn \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng ch\u1ebf t\u1ea1o b\u00ea t\u00f4ng v\u00e0 v\u1eefa nh\u01b0 sau:<\/span><\/p>\n

a) \u0110\u1ed1i v\u1edbi b\u00ea t\u00f4ng:<\/p>\n

– C\u00e1t c\u00f3 m\u00f4\u0111un \u0111\u1ed9 l\u1edbn t\u1eeb 0,7 \u0111\u1ebfn 1 (th\u00e0nh ph\u1ea7n h\u1ea1t nh\u01b0 B\u1ea3ng 1) c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng ch\u1ebf t\u1ea1o b\u00ea t\u00f4ng c\u1ea5p th\u1ea5p h\u01a1n B15;<\/p>\n

– C\u00e1t c\u00f3 m\u00f4\u0111un \u0111\u1ed9 l\u1edbn t\u1eeb 1 \u0111\u1ebfn 2 (th\u00e0nh ph\u1ea7n h\u1ea1t nh\u01b0 B\u1ea3ng 1) c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng ch\u1ebf t\u1ea1o b\u00ea t\u00f4ng c\u1ea5p t\u1eeb B15 \u0111\u1ebfn B25;<\/p>\n

b) \u0110\u1ed1i v\u1edbi v\u1eefa:<\/p>\n

– C\u00e1t c\u00f3 m\u00f4\u0111un \u0111\u1ed9 l\u1edbn t\u1eeb 0,7 \u0111\u1ebfn 1,5 c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng ch\u1ebf t\u1ea1o v\u1eefa m\u00e1c nh\u1ecf h\u01a1n v\u00e0 b\u1eb1ng M5;<\/p>\n

– C\u00e1t c\u00f3 m\u00f4\u0111un \u0111\u1ed9 l\u1edbn t\u1eeb 1,5 \u0111\u1ebfn 2 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng ch\u1ebf t\u1ea1o v\u1eefa m\u00e1c M7,5.<\/p>\n

<\/div>\n

Ch\u00fa th\u00edch TCXD 127 : 1985 h\u01b0\u1edbng d\u1eabn c\u1ee5 th\u1ec3 vi\u1ec7c s\u1eed d\u1ee5ng t\u1eebng lo\u1ea1i c\u00e1t m\u1ecbn tr\u00ean c\u01a1 s\u1edf t\u00ednh to\u00e1n hi\u1ec7u qu\u1ea3 kinh t\u1ebf – k\u1ef9 thu\u1eadt.<\/span><\/p>\n

4.1.4\u00a0<\/span><\/b>C\u00e1t d\u00f9ng ch\u1ebf t\u1ea1o v\u1eefa kh\u00f4ng \u0111\u01b0\u1ee3c l\u1eabn qu\u00e1 5 % kh\u1ed1i l\u01b0\u1ee3ng c\u00e1c h\u1ea1t c\u00f3 k\u00edch th\u01b0\u1edbc l\u1edbn h\u01a1n \u00a05 mm.<\/span><\/p>\n

4.1.5\u00a0<\/span><\/b>H\u00e0m l\u01b0\u1ee3ng c\u00e1c t\u1ea1p ch\u1ea5t (s\u00e9t c\u1ee5c v\u00e0 c\u00e1c t\u1ea1p ch\u1ea5t d\u1ea1ng c\u1ee5c; b\u00f9n, b\u1ee5i v\u00e0 s\u00e9t) trong c\u00e1t \u0111\u01b0\u1ee3c quy \u0111\u1ecbnh trong B\u1ea3ng 2.<\/span><\/p>\n

B\u1ea3ng 2 – H\u00e0m l\u01b0\u1ee3ng c\u00e1c t\u1ea1p ch\u1ea5t trong c\u00e1t<\/span><\/b><\/p>\n\n\n\n\n\n\n
\n

T\u1ea1p ch\u1ea5t<\/b><\/p>\n<\/td>\n

\n

H\u00e0m l\u01b0\u1ee3ng t\u1ea1p ch\u1ea5t,\u00a0<\/b>% kh\u1ed1i l\u01b0\u1ee3ng, kh\u00f4ng l\u1edbn h\u01a1n<\/p>\n<\/td>\n<\/tr>\n

\n

B\u00ea t\u00f4ng c\u1ea5p cao h\u01a1n B30<\/b><\/p>\n<\/td>\n

\n

B\u00ea t\u00f4ng c\u1ea5p th\u1ea5p h\u01a1n v\u00e0 b\u1eb1ng B30<\/b><\/p>\n<\/td>\n

\n

v\u1eefa<\/b><\/p>\n<\/td>\n<\/tr>\n

–\u00a0S\u00e9t c\u1ee5c v\u00e0 c\u00e1c t\u1ea1p ch\u1ea5t d\u1ea1ng c\u1ee5c<\/td>\n\n

Kh\u00f4ng \u0111\u01b0\u1ee3c c\u00f3<\/p>\n<\/td>\n

\n

0,25<\/p>\n<\/td>\n

\n

0,50<\/p>\n<\/td>\n<\/tr>\n

–\u00a0H\u00e0m l\u01b0\u1ee3ng b\u00f9n, b\u1ee5i, s\u00e9t<\/td>\n\n

1,50<\/p>\n<\/td>\n

\n

3,00<\/p>\n<\/td>\n

\n

10,00<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

4.1.6<\/span><\/b>\u00a0T\u1ea1p ch\u1ea5t h\u1eefu c\u01a1 trong c\u00e1t khi x\u00e1c \u0111\u1ecbnh theo ph\u01b0\u01a1ng ph\u00e1p so m\u00e0u, kh\u00f4ng \u0111\u01b0\u1ee3c th\u1eabm h\u01a1n m\u00e0u chu\u1ea9n.<\/span><\/p>\n

ch\u00fa th\u00edch C\u00e1t kh\u00f4ng tho\u1ea3 m\u00e3n \u0111i\u1ec1u 4.1.6 c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng n\u1ebfu k\u1ebft qu\u1ea3 th\u00ed nghi\u1ec7m ki\u1ec3m ch\u1ee9ng trong b\u00ea t\u00f4ng cho th\u1ea5y l\u01b0\u1ee3ng t\u1ea1p ch\u1ea5t h\u1eefu c\u01a1 n\u00e0y kh\u00f4ng l\u00e0m gi\u1ea3m t\u00ednh ch\u1ea5t c\u01a1 l\u00fd y\u00eau c\u1ea7u \u0111\u1ed1i v\u1edbi b\u00ea t\u00f4ng.<\/span><\/p>\n

4.1.7\u00a0<\/span><\/b>H\u00e0m l\u01b0\u1ee3ng clorua trong c\u00e1t,\u00a0<\/b>t\u00ednh theo ion Cl–<\/sup>\u00a0tan trong axit, quy \u0111\u1ecbnh trong B\u1ea3ng 3.<\/span><\/p>\n

B\u1ea3ng 3 – H\u00e0m l\u01b0\u1ee3ng ion Cl\u2011<\/sup>\u00a0trong c\u00e1t<\/span><\/b><\/p>\n\n\n\n\n\n
\n

Lo\u1ea1i b\u00ea t\u00f4ng v\u00e0 v\u1eefa<\/b><\/p>\n<\/td>\n

\n

H\u00e0m l\u01b0\u1ee3ng ion Cl–<\/sup>,\u00a0<\/b>% kh\u1ed1i l\u01b0\u1ee3ngj, kh\u00f4ng l\u1edbn h\u01a1n<\/p>\n<\/td>\n<\/tr>\n

B\u00ea t\u00f4ng d\u00f9ng trong c\u00e1c k\u1ebft c\u1ea5u b\u00ea t\u00f4ng c\u1ed1t th\u00e9p \u1ee9ng su\u1ea5t tr\u01b0\u1edbc<\/td>\n\n

0,01<\/p>\n<\/td>\n<\/tr>\n

B\u00ea t\u00f4ng d\u00f9ng trong c\u00e1c k\u1ebft c\u1ea5u b\u00ea t\u00f4ng v\u00e0 b\u00ea t\u00f4ng c\u1ed1t th\u00e9p v\u00e0 v\u1eefa th\u00f4ng th\u01b0\u1eddng<\/td>\n\n

0,05<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Ch\u00fa th\u00edch C\u00e1t c\u00f3 h\u00e0m l\u01b0\u1ee3ng ion Cl–<\/sup>\u00a0l\u1edbn h\u01a1n c\u00e1c gi\u00e1 tr\u1ecb quy \u0111\u1ecbnh \u1edf B\u1ea3ng 3 c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng n\u1ebfu t\u1ed5ng h\u00e0m l\u01b0\u1ee3ng ion Cl–<\/sup>\u00a0trong 1 m3<\/sup>\u00a0b\u00ea t\u00f4ng t\u1eeb t\u1ea5t c\u1ea3 c\u00e1c ngu\u1ed3n v\u1eadt li\u1ec7u ch\u1ebf t\u1ea1o, kh\u00f4ng v\u01b0\u1ee3t qu\u00e1 0,6 kg.<\/span><\/p>\n

4.1.8<\/span><\/b>\u00a0C\u00e1t \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng khi kh\u1ea3 n\u0103ng ph\u1ea3n \u1ee9ng ki\u1ec1m\u00a0<\/span>–<\/span>\u00a0silic c\u1ee7a c\u00e1t ki\u1ec3m tra theo ph\u01b0\u01a1ng ph\u00e1p ho\u00e1 h\u1ecdc (TCVN 7572-14 : 2006) ph\u1ea3i n\u1eb1m trong v\u00f9ng c\u1ed1t li\u1ec7u v\u00f4 h\u1ea1i. Khi kh\u1ea3 n\u0103ng ph\u1ea3n \u1ee9ng ki\u1ec1m – silic c\u1ee7a c\u1ed1t li\u1ec7u ki\u1ec3m tra n\u1eb1m trong v\u00f9ng c\u00f3 kh\u1ea3 n\u0103ng g\u00e2y h\u1ea1i th\u00ec c\u1ea7n th\u00ed nghi\u1ec7m ki\u1ec3m tra b\u1ed5 xung theo ph\u01b0\u01a1ng ph\u00e1p thanh v\u1eefa (TCVN 7572-14 : 2006) \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o ch\u1eafc ch\u1eafn v\u00f4 h\u1ea1i..<\/span><\/p>\n

\u00a0C\u00e1t \u0111\u01b0\u1ee3c coi l\u00e0 kh\u00f4ng c\u00f3 kh\u1ea3 n\u0103ng x\u1ea3y ra ph\u1ea3n \u1ee9ng ki\u1ec1m \u2013 silic n\u1ebfu bi\u1ebfn d\u1ea1ng (<\/span>e<\/span>) \u1edf tu\u1ed5i 6 th\u00e1ng x\u00e1c \u0111\u1ecbnh theo ph\u01b0\u01a1ng ph\u00e1p thanh v\u1eefa nh\u1ecf h\u01a1n 0,1%.<\/span><\/p>\n

4.2 C\u1ed1t li\u1ec7u l\u1edbn<\/span><\/b><\/p>\n

4.2.1\u00a0<\/span><\/b>C\u1ed1t li\u1ec7u l\u1edbn c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c cung c\u1ea5p d\u01b0\u1edbi d\u1ea1ng h\u1ed7n h\u1ee3p nhi\u1ec1u c\u1ee1 h\u1ea1t ho\u1eb7c c\u00e1c c\u1ee1 h\u1ea1t ri\u00eang bi\u1ec7t. Th\u00e0nh ph\u1ea7n h\u1ea1t c\u1ee7a c\u1ed1t li\u1ec7u l\u1edbn, bi\u1ec3u th\u1ecb b\u1eb1ng l\u01b0\u1ee3ng s\u00f3t t\u00edch lu\u1ef9 tr\u00ean c\u00e1c s\u00e0ng, \u0111\u01b0\u1ee3c quy \u0111\u1ecbnh trong B\u1ea3ng 4.<\/span><\/p>\n

B\u1ea3ng 4 – Th\u00e0nh ph\u1ea7n h\u1ea1t c\u1ee7a c\u1ed1t li\u1ec7u l\u1edbn<\/span><\/b><\/p>\n\n\n\n\n\n\n\n\n\n\n
\n

K\u00edch th\u01b0\u1edbc l\u1ed7 s\u00e0ng\u00a0<\/span><\/b>mm<\/span><\/p>\n<\/td>\n

\n

L\u01b0\u1ee3ng s\u00f3t t\u00edch l\u0169y tr\u00ean s\u00e0ng, % kh\u1ed1i l\u01b0\u1ee3ng, \u1ee9ng v\u1edbi k\u00edch th\u01b0\u1edbc h\u1ea1t li\u1ec7u nh\u1ecf nh\u1ea5t v\u00e0 l\u1edbn nh\u1ea5t,\u00a0<\/span><\/b>mm<\/span><\/p>\n<\/td>\n<\/tr>\n

\n

5-10<\/span><\/b><\/p>\n<\/td>\n

\n

5-20<\/span><\/b><\/p>\n<\/td>\n

\n

5-40<\/span><\/b><\/p>\n<\/td>\n

\n

5-70<\/span><\/b><\/p>\n<\/td>\n

\n

10-40<\/span><\/b><\/p>\n<\/td>\n

\n

10-70<\/span><\/b><\/p>\n<\/td>\n

\n

20-70<\/span><\/b><\/p>\n<\/td>\n<\/tr>\n

\n

100<\/span><\/b><\/p>\n<\/td>\n

\n

–<\/span><\/p>\n<\/td>\n

\n

–<\/span><\/p>\n<\/td>\n

\n

–<\/span><\/p>\n<\/td>\n

\n

0<\/span><\/p>\n<\/td>\n

\n

–<\/span><\/p>\n<\/td>\n

\n

0<\/span><\/p>\n<\/td>\n

\n

0<\/span><\/p>\n<\/td>\n<\/tr>\n

\n

70<\/span><\/b><\/p>\n<\/td>\n

\n

–<\/span><\/p>\n<\/td>\n

\n

–<\/span><\/p>\n<\/td>\n

\n

0<\/span><\/p>\n<\/td>\n

\n

0-10<\/span><\/p>\n<\/td>\n

\n

0<\/span><\/p>\n<\/td>\n

\n

0-10<\/span><\/p>\n<\/td>\n

\n

0-10<\/span><\/p>\n<\/td>\n<\/tr>\n

\n

40<\/span><\/b><\/p>\n<\/td>\n

\n

–<\/span><\/p>\n<\/td>\n

\n

0<\/span><\/p>\n<\/td>\n

\n

0-10<\/span><\/p>\n<\/td>\n

\n

40-70<\/span><\/p>\n<\/td>\n

\n

0-10<\/span><\/p>\n<\/td>\n

\n

40-70<\/span><\/p>\n<\/td>\n

\n

40-70<\/span><\/p>\n<\/td>\n<\/tr>\n

\n

20<\/span><\/b><\/p>\n<\/td>\n

\n

0<\/span><\/p>\n<\/td>\n

\n

0-10<\/span><\/p>\n<\/td>\n

\n

40-70<\/span><\/p>\n<\/td>\n

\n

\u2026<\/span><\/p>\n<\/td>\n

\n

40-70<\/span><\/p>\n<\/td>\n

\n

\u2026<\/span><\/p>\n<\/td>\n

\n

90-100<\/span><\/p>\n<\/td>\n<\/tr>\n

\n

10<\/span><\/b><\/p>\n<\/td>\n

\n

0-10<\/span><\/p>\n<\/td>\n

\n

40-70<\/span><\/p>\n<\/td>\n

\n

\u2026<\/span><\/p>\n<\/td>\n

\n

\u2026<\/span><\/p>\n<\/td>\n

\n

90-100<\/span><\/p>\n<\/td>\n

\n

90-100<\/span><\/p>\n<\/td>\n

\n

–<\/span><\/p>\n<\/td>\n<\/tr>\n

\n

5<\/span><\/b><\/p>\n<\/td>\n

\n

90-100<\/span><\/p>\n<\/td>\n

\n

90-100<\/span><\/p>\n<\/td>\n

\n

90-100<\/span><\/p>\n<\/td>\n

\n

90-100<\/span><\/p>\n<\/td>\n

\n

–<\/span><\/p>\n<\/td>\n

\n

–<\/span><\/p>\n<\/td>\n

\n

–<\/span><\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Ch\u00fa th\u00edch C\u00f3 th\u1ec3 s\u1eed d\u1ee5ng c\u1ed1t li\u1ec7u l\u1edbn v\u1edbi k\u00edch th\u01b0\u1edbc c\u1ee1 h\u1ea1t nh\u1ecf nh\u1ea5t \u0111\u1ebfn 3 mm, theo tho\u1ea3 thu\u1eadn.<\/span><\/p>\n

4.2.2\u00a0<\/span><\/b>H\u00e0m l\u01b0\u1ee3ng b\u00f9n, b\u1ee5i, s\u00e9t trong c\u1ed1t li\u1ec7u l\u1edbn tu\u1ef3 theo c\u1ea5p b\u00ea t\u00f4ng kh\u00f4ng v\u01b0\u1ee3t qu\u00e1 gi\u00e1 tr\u1ecb quy \u0111\u1ecbnh trong B\u1ea3ng 5.<\/span><\/p>\n

B\u1ea3ng 5 – H\u00e0m l\u01b0\u1ee3ng b\u00f9n, b\u1ee5i, s\u00e9t trong c\u1ed1t li\u1ec7u l\u1edbn<\/span><\/b><\/p>\n\n\n\n\n\n\n
\n

C\u1ea5p b\u00ea t\u00f4ng<\/b><\/p>\n<\/td>\n

\n

H\u00e0m l\u01b0\u1ee3ng b\u00f9n, b\u1ee5i, s\u00e9t,\u00a0<\/b>% kh\u1ed1i l\u01b0\u1ee3ng, kh\u00f4ng l\u1edbn h\u01a1n<\/p>\n<\/td>\n<\/tr>\n

– Cao h\u01a1n B30<\/td>\n\n

1,0<\/p>\n<\/td>\n<\/tr>\n

– T\u1eeb B15 \u0111\u1ebfn B30<\/td>\n\n

2,0<\/p>\n<\/td>\n<\/tr>\n

– Th\u1ea5p h\u01a1n B15<\/td>\n\n

3,0<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

4.2.3\u00a0<\/span><\/b>\u0110\u00e1 l\u00e0m c\u1ed1t li\u1ec7u l\u1edbn cho b\u00ea t\u00f4ng ph\u1ea3i c\u00f3 c\u01b0\u1eddng \u0111\u1ed9 th\u1eed tr\u00ean m\u1eabu \u0111\u00e1 nguy\u00ean khai ho\u1eb7c m\u00e1c x\u00e1c \u0111\u1ecbnh th\u00f4ng qua gi\u00e1 tr\u1ecb \u0111\u1ed9 n\u00e9n d\u1eadp trong xi lanh l\u1edbn h\u01a1n 2 l\u1ea7n c\u1ea5p c\u01b0\u1eddng \u0111\u1ed9 ch\u1ecbu n\u00e9n c\u1ee7a b\u00ea t\u00f4ng khi d\u00f9ng \u0111\u00e1 g\u1ed1c ph\u00fan xu\u1ea5t, bi\u1ebfn ch\u1ea5t; l\u1edbn h\u01a1n 1,5 l\u1ea7n c\u1ea5p c\u01b0\u1eddng \u0111\u1ed9 ch\u1ecbu n\u00e9n c\u1ee7a b\u00ea t\u00f4ng khi d\u00f9ng \u0111\u00e1 g\u1ed1c tr\u1ea7m t\u00edch.<\/span><\/p>\n

M\u00e1c \u0111\u00e1 d\u0103m x\u00e1c \u0111\u1ecbnh theo gi\u00e1 tr\u1ecb \u0111\u1ed9 n\u00e9n d\u1eadp trong xi lanh \u0111\u01b0\u1ee3c quy \u0111\u1ecbnh trong B\u1ea3ng 6.<\/p>\n

B\u1ea3ng 6 – M\u00e1c c\u1ee7a \u0111\u00e1 d\u0103m t\u1eeb \u0111\u00e1 thi\u00ean nhi\u00ean theo \u0111\u1ed9 n\u00e9n d\u1eadp<\/span><\/b><\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n
\n

M\u00e1c \u0111\u00e1 d\u0103m*<\/span><\/b><\/p>\n<\/td>\n

\n

\u0110\u1ed9 n\u00e9n d\u1eadp trong xi lanh \u1edf tr\u1ea1ng th\u00e1i b\u00e3o ho\u00e0 n\u01b0\u1edbc,\u00a0<\/span><\/b>% kh\u1ed1i l\u01b0\u1ee3ng<\/span><\/p>\n<\/td>\n<\/tr>\n

\n

\u0110\u00e1 tr\u1ea7m t\u00edch<\/span><\/b><\/p>\n<\/td>\n

\n

\u0110\u00e1 ph\u00fan xu\u1ea5t x\u00e2m nh\u1eadp v\u00e0 \u0111\u00e1 bi\u1ebfn ch\u1ea5t<\/span><\/b><\/p>\n<\/td>\n

\n

\u0110\u00e1 ph\u00fan xu\u1ea5t phun tr\u00e0o<\/span><\/b><\/p>\n<\/td>\n<\/tr>\n

\n

140<\/span><\/p>\n<\/td>\n

\n

–<\/span><\/p>\n<\/td>\n

\n

\u0110\u1ebfn 12<\/span><\/p>\n<\/td>\n

\n

\u0110\u1ebfn 9<\/span><\/p>\n<\/td>\n<\/tr>\n

\n

120<\/span><\/p>\n<\/td>\n

\n

\u0110\u1ebfn 11<\/span><\/p>\n<\/td>\n

\n

L\u1edbn h\u01a1n 12 \u0111\u1ebfn 16<\/span><\/p>\n<\/td>\n

\n

L\u1edbn h\u01a1n 9 \u0111\u1ebfn 11<\/span><\/p>\n<\/td>\n<\/tr>\n

\n

100<\/span><\/p>\n<\/td>\n

\n

L\u1edbn h\u01a1n 11 \u0111\u1ebfn 13<\/span><\/p>\n<\/td>\n

\n

L\u1edbn h\u01a1n 16 \u0111\u1ebfn 20<\/span><\/p>\n<\/td>\n

\n

L\u1edbn h\u01a1n 11 \u0111\u1ebfn 13<\/span><\/p>\n<\/td>\n<\/tr>\n

\n

80<\/span><\/p>\n<\/td>\n

\n

L\u1edbn h\u01a1n 13 \u0111\u1ebfn 15<\/span><\/p>\n<\/td>\n

\n

L\u1edbn h\u01a1n 20 \u0111\u1ebfn 25<\/span><\/p>\n<\/td>\n

\n

L\u1edbn h\u01a1n 13 \u0111\u1ebfn 15<\/span><\/p>\n<\/td>\n<\/tr>\n

\n

60<\/span><\/p>\n<\/td>\n

\n

L\u1edbn h\u01a1n 15 \u0111\u1ebfn 20<\/span><\/p>\n<\/td>\n

\n

L\u1edbn h\u01a1n 25 \u0111\u1ebfn 34<\/span><\/p>\n<\/td>\n

\n

–<\/span><\/p>\n<\/td>\n<\/tr>\n

\n

40<\/span><\/p>\n<\/td>\n

\n

L\u1edbn h\u01a1n 20 \u0111\u1ebfn 28<\/span><\/p>\n<\/td>\n

\n

–<\/span><\/p>\n<\/td>\n

\n

–<\/span><\/p>\n<\/td>\n<\/tr>\n

\n

30<\/span><\/p>\n<\/td>\n

\n

L\u1edbn h\u01a1n 28 \u0111\u1ebfn 38<\/span><\/p>\n<\/td>\n

\n

–<\/span><\/p>\n<\/td>\n

\n

–<\/span><\/p>\n<\/td>\n<\/tr>\n

\n

20<\/span><\/p>\n<\/td>\n

\n

L\u1edbn h\u01a1n 38 \u0111\u1ebfn 54<\/span><\/p>\n<\/td>\n

\n

–<\/span><\/p>\n<\/td>\n

\n

–<\/span><\/p>\n<\/td>\n<\/tr>\n

\n

* Ch\u1ec9 s\u1ed1 m\u00e1c \u0111\u00e1 d\u0103m x\u00e1c \u0111\u1ecbnh theo c\u01b0\u1eddng \u0111\u1ed9 ch\u1ecbu n\u00e9n, t\u00ednh b\u1eb1ng MPa t\u01b0\u01a1ng \u0111\u01b0\u01a1ng v\u1edbi c\u00e1c gi\u00e1 tr\u1ecb 1 400; 1 200; …; 200 khi c\u01b0\u1eddng \u0111\u1ed9 ch\u1ecbu n\u00e9n t\u00ednh b\u1eb1ng kG\/cm2<\/sup>.<\/span><\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

4.2.4\u00a0<\/span><\/b>S\u1ecfi v\u00e0 s\u1ecfi d\u0103m d\u00f9ng l\u00e0m c\u1ed1t li\u1ec7u cho b\u00ea t\u00f4ng c\u00e1c c\u1ea5p ph\u1ea3i c\u00f3 \u0111\u1ed9 n\u00e9n d\u1eadp trong xi lanh ph\u00f9 h\u1ee3p v\u1edbi y\u00eau c\u1ea7u trong B\u1ea3ng 7.<\/span><\/p>\n

B\u1ea3ng 7 – Y\u00eau c\u1ea7u v\u1ec1 \u0111\u1ed9 n\u00e9n d\u1eadp \u0111\u1ed1i v\u1edbi s\u1ecfi v\u00e0 s\u1ecfi d\u0103m<\/span><\/b><\/p>\n\n\n\n\n\n\n\n
\n

C\u1ea5p b\u00ea t\u00f4ng<\/span><\/b><\/p>\n<\/td>\n

\n

\u0110\u1ed9 n\u00e9n d\u1eadp \u1edf tr\u1ea1ng th\u00e1i b\u00e3o ho\u00e0 n\u01b0\u1edbc<\/span><\/b>,% kh\u1ed1i l\u01b0\u1ee3ng, kh\u00f4ng l\u1edbn h\u01a1n<\/span><\/p>\n<\/td>\n<\/tr>\n

\n

S\u1ecfi<\/span><\/b><\/p>\n<\/td>\n

\n

S\u1ecfi d\u0103m<\/span><\/b><\/p>\n<\/td>\n<\/tr>\n

Cao h\u01a1n B25<\/span><\/td>\n\n

8<\/span><\/p>\n<\/td>\n

\n

10<\/span><\/p>\n<\/td>\n<\/tr>\n

T\u1eeb B15 \u0111\u1ebfn B25<\/span><\/td>\n\n

12<\/span><\/p>\n<\/td>\n

\n

14<\/span><\/p>\n<\/td>\n<\/tr>\n

Th\u1ea5p h\u01a1n B15<\/span><\/td>\n\n

16<\/span><\/p>\n<\/td>\n

\n

18<\/span><\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

4.2.5\u00a0<\/span><\/b>\u0110\u1ed9 hao m\u00f2n khi va \u0111\u1eadp c\u1ee7a c\u1ed1t li\u1ec7u l\u1edbn th\u00ed nghi\u1ec7m trong m\u00e1y Los Angeles, kh\u00f4ng l\u1edbn h\u01a1n 50 % kh\u1ed1i l\u01b0\u1ee3ng.<\/span><\/p>\n

4.2.6<\/span><\/b>\u00a0H\u00e0m l\u01b0\u1ee3ng h\u1ea1t thoi d\u1eb9t trong c\u1ed1t li\u1ec7u l\u1edbn kh\u00f4ng v\u01b0\u1ee3t qu\u00e1 15 % \u0111\u1ed1i v\u1edbi b\u00ea t\u00f4ng c\u1ea5p cao h\u01a1n B30 v\u00e0 kh\u00f4ng v\u01b0\u1ee3t qu\u00e1 35 % \u0111\u1ed1i v\u1edbi c\u1ea5p B30 v\u00e0 th\u1ea5p h\u01a1n.<\/span><\/p>\n

4.2.7<\/span><\/b>\u00a0T\u1ea1p ch\u1ea5t h\u1eefu c\u01a1 trong s\u1ecfi x\u00e1c \u0111\u1ecbnh theo ph\u01b0\u01a1ng ph\u00e1p so m\u00e0u, kh\u00f4ng th\u1eabm h\u01a1n m\u00e0u chu\u1ea9n.<\/span><\/p>\n

ch\u00fa th\u00edch S\u1ecfi ch\u1ee9a l\u01b0\u1ee3ng t\u1ea1p ch\u1ea5t h\u1eefu c\u01a1 kh\u00f4ng ph\u00f9 h\u1ee3p v\u1edbi quy \u0111\u1ecbnh tr\u00ean v\u1eabn c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng n\u1ebfu k\u1ebft qu\u1ea3 th\u00ed nghi\u1ec7m ki\u1ec3m ch\u1ee9ng trong b\u00ea t\u00f4ng cho th\u1ea5y l\u01b0\u1ee3ng t\u1ea1p ch\u1ea5t h\u1eefu c\u01a1 n\u00e0y kh\u00f4ng l\u00e0m gi\u1ea3m c\u00e1c t\u00ednh ch\u1ea5t c\u01a1 l\u00fd y\u00eau c\u1ea7u \u0111\u1ed1i v\u1edbi b\u00ea t\u00f4ng c\u1ee5 th\u1ec3.<\/span><\/p>\n

4.2.8<\/span><\/b>\u00a0H\u00e0m l\u01b0\u1ee3ng ion Cl–<\/sup>\u00a0(tan trong axit) trong c\u1ed1t li\u1ec7u l\u1edbn, kh\u00f4ng v\u01b0\u1ee3t qu\u00e1 0,01 %.<\/span><\/p>\n

ch\u00fa th\u00edch C\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng c\u1ed1t li\u1ec7u l\u1edbn c\u00f3 h\u00e0m l\u01b0\u1ee3ng ion Cl–<\/sup>\u00a0l\u1edbn h\u01a1n 0,01 % n\u1ebfu t\u1ed5ng h\u00e0m l\u01b0\u1ee3ng ion Cl—<\/sup>\u00a0trong 1 m3<\/sup>\u00a0b\u00ea t\u00f4ng kh\u00f4ng v\u01b0\u1ee3t qu\u00e1 0,6 kg.<\/span><\/p>\n

4.2.9<\/span><\/b>\u00a0Kh\u1ea3 n\u0103ng ph\u1ea3n \u1ee9ng ki\u1ec1m\u00a0<\/span>–<\/span>\u00a0silic \u0111\u1ed1i v\u1edbi c\u1ed1t li\u1ec7u l\u1edbn \u0111\u01b0\u1ee3c quy \u0111\u1ecbnh nh\u01b0 \u0111\u1ed1i v\u1edbi c\u1ed1t li\u1ec7u nh\u1ecf theo 4.1.8.<\/span><\/p>\n

5. Ph\u01b0\u01a1ng ph\u00e1p th\u1eed<\/span><\/b><\/p>\n

5.1\u00a0<\/b>L\u1ea5y m\u1eabu th\u1eed c\u1ed1t li\u1ec7u theo TCVN 7572-1 : 2006.<\/p>\n

M\u1eabu th\u1eed d\u00f9ng x\u00e1c \u0111\u1ecbnh th\u00e0nh ph\u1ea7n h\u1ea1t c\u00f3 th\u1ec3 d\u00f9ng \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh h\u00e0m l\u01b0\u1ee3ng h\u1ea1t m\u1ecbn.<\/p>\n

5.2\u00a0<\/span><\/b>X\u00e1c \u0111\u1ecbnh th\u00e0nh ph\u1ea7n h\u1ea1t c\u1ee7a c\u1ed1t li\u1ec7u theo TCVN 7572-2 : 2006.<\/span><\/p>\n

5.3<\/span><\/b>\u00a0X\u00e1c \u0111\u1ecbnh th\u00e0nh ph\u1ea7n th\u1ea1ch h\u1ecdc c\u1ee7a c\u1ed1t li\u1ec7u theo TCVN 7572-3 : 2006.<\/span><\/p>\n

5.4\u00a0<\/span><\/b>X\u00e1c \u0111\u1ecbnh kh\u1ed1i l\u01b0\u1ee3ng ri\u00eang, kh\u1ed1i l\u01b0\u1ee3ng th\u1ec3 t\u00edch v\u00e0 \u0111\u1ed9 h\u00fat n\u01b0\u1edbc c\u1ee7a c\u1ed1t li\u1ec7u theo TCVN 7572-4 : 2006.<\/span><\/p>\n

5.5<\/span><\/b>\u00a0X\u00e1c \u0111\u1ecbnh kh\u1ed1i l\u01b0\u1ee3ng ri\u00eang, kh\u1ed1i l\u01b0\u1ee3ng th\u1ec3 t\u00edch v\u00e0 \u0111\u1ed9 h\u00fat n\u01b0\u1edbc c\u1ee7a \u0111\u00e1 g\u1ed1c v\u00e0 h\u1ea1t c\u1ed1t li\u1ec7u l\u1edbn theo TCVN 7572-5 : 2006.<\/span><\/p>\n

5.6<\/span><\/b>\u00a0X\u00e1c \u0111\u1ecbnh kh\u1ed1i l\u01b0\u1ee3ng th\u1ec3 t\u00edch x\u1ed1p v\u00e0 \u0111\u1ed9 h\u1ed5ng c\u1ee7a c\u1ed1t li\u1ec7u theo TCVN 7572-6 : 2006.<\/span><\/p>\n

5.7<\/span><\/b>\u00a0X\u00e1c \u0111\u1ecbnh \u0111\u1ed9 \u1ea9m c\u1ee7a c\u1ed1t li\u1ec7u theo TCVN 7572-7 : 2006.<\/span><\/p>\n

5.8<\/span><\/b>\u00a0X\u00e1c \u0111\u1ecbnh h\u00e0m l\u01b0\u1ee3ng b\u1ee5i, b\u00f9n, s\u00e9t trong c\u1ed1t li\u1ec7u v\u00e0 h\u00e0m l\u01b0\u1ee3ng s\u00e9t c\u1ee5c trong c\u1ed1t li\u1ec7u nh\u1ecf theo TCVN 7572-8 : 2006.<\/span><\/p>\n

5.9<\/span><\/b>\u00a0X\u00e1c \u0111\u1ecbnh t\u1ea1p ch\u1ea5t h\u1eefu c\u01a1 theo TCVN 7572-9 : 2006.<\/span><\/p>\n

5.10<\/span><\/b>\u00a0X\u00e1c \u0111\u1ecbnh c\u01b0\u1eddng \u0111\u1ed9 v\u00e0 h\u1ec7 s\u1ed1 ho\u00e1 m\u1ec1m c\u1ee7a \u0111\u00e1 g\u1ed1c l\u00e0m theo TCVN 7572-10 : 2006.<\/span><\/p>\n

5.11<\/span><\/b>\u00a0X\u00e1c \u0111\u1ecbnh \u0111\u1ed9 n\u00e9n d\u1eadp v\u00e0 h\u1ec7 s\u1ed1 ho\u00e1 m\u1ec1m c\u1ee7a c\u1ed1t li\u1ec7u l\u1edbn theo TCVN 7572-11 : 2006.<\/span><\/p>\n

5.12\u00a0<\/span><\/b>X\u00e1c \u0111\u1ecbnh \u0111\u1ed9 hao m\u00f2n khi va \u0111\u1eadp c\u1ee7a c\u1ed1t li\u1ec7u l\u1edbn trong m\u00e1y Los Angeles theo TCVN 7572-12 : 2006.<\/span><\/p>\n

5.13\u00a0<\/span><\/b>X\u00e1c \u0111\u1ecbnh h\u00e0m l\u01b0\u1ee3ng h\u1ea1t thoi d\u1eb9t trong c\u1ed1t li\u1ec7u l\u1edbn theo TCVN 7572-13 : 2006.<\/span><\/p>\n

5.14\u00a0<\/span><\/b>X\u00e1c \u0111\u1ecbnh kh\u1ea3 n\u0103ng ph\u1ea3n \u1ee9ng ki\u1ec1m\u00a0<\/span>–<\/span>\u00a0silic trong c\u1ed1t li\u1ec7u b\u1eb1ng ph\u01b0\u01a1ng ph\u00e1p h\u00f3a h\u1ecdc theo TCVN 7572-14 : 2006.<\/span><\/p>\n

\u00a05.15\u00a0<\/b>X\u00e1c \u0111\u1ecbnh kh\u1ea3 n\u0103ng ph\u1ea3n \u1ee9ng ki\u1ec1m\u00a0<\/span>–<\/span>\u00a0silic trong c\u1ed1t li\u1ec7u b\u1eb1ng ph\u01b0\u01a1ng ph\u00e1p thanh v\u1eefa theo TCVN 7572-14 : 2006.<\/span><\/p>\n

5.16\u00a0<\/span><\/b>X\u00e1c \u0111\u1ecbnh h\u00e0m l\u01b0\u1ee3ng ion Cl trong c\u1ed1t li\u1ec7u theo TCVN 7572-15 : 2006.<\/span><\/p>\n

6 V\u1eadn chuy\u1ec3n v\u00e0 b\u1ea3o qu\u1ea3n<\/span><\/b><\/p>\n

6.1\u00a0<\/b>M\u1ed7i l\u00f4 c\u1ed1t li\u1ec7u ph\u1ea3i c\u00f3 gi\u1ea5y ch\u1ee9ng nh\u1eadn ch\u1ea5t l\u01b0\u1ee3ng k\u00e8m theo, trong \u0111\u00f3 ghi r\u00f5:<\/p>\n

– T\u00ean c\u01a1 s\u1edf cung c\u1ea5p c\u1ed1t li\u1ec7u, \u0111\u1ecba ch\u1ec9, \u0111i\u1ec7n tho\u1ea1i, fax;<\/p>\n

– Lo\u1ea1i c\u1ed1t li\u1ec7u;<\/p>\n

– Ngu\u1ed3n g\u1ed1c c\u1ed1t li\u1ec7u;<\/p>\n

– S\u1ed1 l\u00f4 v\u00e0 kh\u1ed1i l\u01b0\u1ee3ng;<\/p>\n

– K\u1ebft qu\u1ea3 th\u00ed nghi\u1ec7m c\u00e1c ch\u1ec9 ti\u00eau, t\u00ednh ch\u1ea5t c\u1ee7a c\u1ed1t li\u1ec7u.<\/p>\n

6.2\u00a0<\/span><\/b>C\u1ed1t li\u1ec7u \u0111\u01b0\u1ee3c v\u1eadn chuy\u1ec3n b\u1eb1ng s\u00e0 lan, t\u00e0u ho\u1ea3, \u00f4 t\u00f4 ho\u1eb7c b\u1eb1ng c\u00e1c ph\u01b0\u01a1ng ti\u1ec7n kh\u00e1c m\u00e0 kh\u00f4ng l\u00e0m bi\u1ebfn \u0111\u1ed5i c\u00e1c t\u00ednh ch\u1ea5t c\u01a1, l\u00fd v\u00e0 h\u00f3a h\u1ecdc c\u1ee7a c\u1ed1t li\u1ec7u.<\/span><\/p>\n

6.3<\/span><\/b>\u00a0C\u1ed1t li\u1ec7u c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c b\u1ea3o qu\u1ea3n \u1edf kho c\u00f3 m\u00e1i che ho\u1eb7c s\u00e2n b\u00e3i n\u01a1i kh\u00f4 r\u00e1o.<\/span><\/p>\n

6.4\u00a0<\/span><\/b>Khi v\u1eadn chuy\u1ec3n v\u00e0 b\u1ea3o qu\u1ea3n c\u1ed1t li\u1ec7u ph\u1ea3i \u0111\u1ec3 ri\u00eang t\u1eebng lo\u1ea1i v\u00e0 t\u1eebng c\u1ee1 h\u1ea1t (n\u1ebfu c\u00f3), tr\u00e1nh \u0111\u1ec3 l\u1eabn t\u1ea1p ch\u1ea5t.<\/span><\/p>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

N\u1ed9i dung to\u00e0n v\u0103n Ti\u00eau chu\u1ea9n Vi\u1ec7t Nam TCVN 7570:2006 v\u1ec1 c\u1ed1t li\u1ec7u cho b\u00ea t\u00f4ng v\u00e0 v\u1eefa – y\u00eau c\u1ea7u k\u1ef9 thu\u1eadt do B\u1ed9 Khoa h\u1ecdc v\u00e0 C\u00f4ng ngh\u1ec7 ban h\u00e0nh TI\u00caU CHU\u1ea8N VI\u1ec6T\u00a0NAM TCVN 7570:2006 C\u1ed0T LI\u1ec6U CHO B\u00ca T\u00d4NG V\u00c0 V\u1eeeA ( Y\u00caU C\u1ea6U K\u1ef8 THU\u1eacT Aggregates for concrete and mortar\u00a0–\u00a0Specifications \u00a0…<\/p>\n","protected":false},"author":1,"featured_media":7853,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[42],"tags":[],"class_list":["post-7850","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-tieu-chuan-xay-dung"],"_links":{"self":[{"href":"https:\/\/tailieuxaydung.net\/index.php?rest_route=\/wp\/v2\/posts\/7850","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/tailieuxaydung.net\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/tailieuxaydung.net\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/tailieuxaydung.net\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/tailieuxaydung.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=7850"}],"version-history":[{"count":2,"href":"https:\/\/tailieuxaydung.net\/index.php?rest_route=\/wp\/v2\/posts\/7850\/revisions"}],"predecessor-version":[{"id":7852,"href":"https:\/\/tailieuxaydung.net\/index.php?rest_route=\/wp\/v2\/posts\/7850\/revisions\/7852"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/tailieuxaydung.net\/index.php?rest_route=\/wp\/v2\/media\/7853"}],"wp:attachment":[{"href":"https:\/\/tailieuxaydung.net\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=7850"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/tailieuxaydung.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=7850"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/tailieuxaydung.net\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=7850"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}