{"id":7974,"date":"2021-06-07T07:24:29","date_gmt":"2021-06-07T07:24:29","guid":{"rendered":"https:\/\/thuvienxaydung.com.vn\/?p=7974"},"modified":"2021-06-07T07:24:40","modified_gmt":"2021-06-07T07:24:40","slug":"tieu-chuan-viet-nam-tcvn-64761999-ve-gach-be-tong-tu-chen","status":"publish","type":"post","link":"https:\/\/tailieuxaydung.net\/?p=7974","title":{"rendered":"Ti\u00eau chu\u1ea9n Vi\u1ec7t Nam TCVN 6476:1999 v\u1ec1 g\u1ea1ch b\u00ea t\u00f4ng t\u1ef1 ch\u00e8n"},"content":{"rendered":"

N\u1ed9i dung to\u00e0n v\u0103n Ti\u00eau chu\u1ea9n Vi\u1ec7t Nam TCVN 6476:1999 v\u1ec1 g\u1ea1ch b\u00ea t\u00f4ng t\u1ef1 ch\u00e8n<\/h2>\n
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TI\u00caU CHU\u1ea8N VI\u1ec6T\u00a0<\/b>NAM<\/b><\/p>\n

TCVN 6476:1999<\/b><\/p>\n

G\u1ea0CH B\u00ca T\u00d4NG T\u1ef0 CH\u00c8N
\nInterlocking concrete bricks<\/p>\n

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

Ti\u00eau chu\u1ea9n n\u00e0y \u00e1p d\u1ee5ng cho g\u1ea1ch b\u00ea t\u00f4ng t\u1ef1 ch\u00e8n \u0111\u01b0\u1ee3c s\u1ea3n xu\u1ea5t theo ph\u01b0\u01a1ng ph\u00e1p rung \u00e9p t\u1eeb h\u1ed5n h\u1ee3p b\u00ea t\u00f4ng c\u1ee9ng, d\u00f9ng \u0111\u1ec3 l\u00e1t v\u0129a h\u00e8, \u0111\u01b0\u1eddng ph\u1ed1, s\u00e2n b\u1ea3i, qu\u1ea3ng tr\u01b0\u1eddng.<\/p>\n

2. Ti\u00eau chu\u1ea9n tr\u00edch d\u1eabn.<\/b><\/p>\n

TCVN 6065 : 1995 G\u1ea1ch xi m\u0103ng l\u00e1t n\u1ec1n.<\/p>\n

TCVN 6260 : 1997 Xi m\u0103ng po\u00f3c l\u0103ng h\u1ed5n h\u1ee3p – Y\u00eau c\u1ea7u k\u1ef9 thu\u1eadt.<\/p>\n

TCVN 6355-3 : 1998 G\u1ea1ch x\u00e2y – Ph\u01b0\u01a1ng ph\u00e1p x\u00e1c \u0111\u1ecbnh \u0111\u1ed9 h\u00fat n\u01b0\u1edbc.<\/p>\n

3. H\u00ecnh d\u00e1ng, k\u00edch th\u01b0\u1edbc c\u01a1 b\u1ea3n v\u00e0 k\u00fd hi\u1ec7u quy \u01b0\u1edbc.<\/b><\/p>\n

3.1. H\u00ecnh d\u00e1ng: G\u1ea1ch b\u00ea t\u00f4ng t\u1ef1 ch\u00e8n c\u00f3 h\u00ecnh d\u00e1ng r\u1ea5t \u0111a d\u1ea1ng. M\u1ed9t s\u1ed1 h\u00ecnh d\u00e1ng v\u00e0 t\u00ean g\u1ecdi th\u00f4ng d\u1ee5ng quy \u0111\u1ecbnh tr\u00ean h\u00ecnh 1.<\/p>\n

Ch\u00fa th\u00edch – Tu\u1ef3 theo y\u00eau c\u1ea7u s\u1eed d\u1ee5ng c\u00f3 th\u1ec3 s\u1ea3n xu\u1ea5t g\u1ea1ch b\u00ea t\u00f4ng t\u1ef1 ch\u00e8n c\u00f3 h\u00ecnh d\u00e1ng kh\u00e1c h\u00ecnh 1.<\/p>\n

3.2. K\u00edch th\u01b0\u1edbc v\u00e0 sai l\u1ec7ch k\u00edch th\u01b0\u1edbc: theo b\u1ea3ng1.<\/p>\n

B\u1ea3ng 1 – K\u00edch th\u01b0\u1edbc v\u00e0 sai l\u1ec7ch k\u00edch th\u01b0\u1edbc.<\/b><\/p>\n

K\u00edch th\u01b0\u1edbc t\u00ednh b\u1eb1ng mm<\/i><\/p>\n\n\n\n\n
\n

K\u00edch th\u01b0\u1edbc<\/p>\n<\/td>\n

\n

M\u1ee9c<\/p>\n<\/td>\n

\n

Sai l\u1ec7ch cho ph\u00e9p<\/p>\n<\/td>\n<\/tr>\n

Chi\u1ec1u d\u00e0i t, kh\u00f4ng l\u1edbn h\u01a1n<\/p>\n

Chi\u1ec1u r\u1ed9ng, b<\/p>\n

Chi\u1ec1u d\u1ea7y, h<\/td>\n

280<\/p>\n

–<\/p>\n

60-140<\/td>\n

\u00b1\u00a02<\/p>\n

\u00b1\u00a02<\/p>\n

\u00b1\u00a03<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Ch\u00fa th\u00edch:<\/i><\/p>\n

1\/. Chi\u1ec1u r\u1ed9ng v\u00e0 c\u00e1c k\u00edch th\u01b0\u1edbc t\u1ea1o d\u00e1ng \u0111\u01b0\u1ee3c s\u1ea3n xu\u1ea5t theo y\u00eau c\u1ea7u c\u1ee7a ng\u01b0\u1eddi s\u1eed d\u1ee5ng.<\/i><\/p>\n

2\/. \u01afu ti\u00ean s\u1ea3n xu\u1ea5t c\u00e1c lo\u1ea1i g\u1ea1ch c\u00f3 chi\u1ec1u d\u1ea7y: 60mm – 80mm – 100mm, 120mm.<\/i><\/p>\n

4. K\u00fd hi\u1ec7u quy \u01b0\u1edbc.<\/b><\/p>\n

K\u00fd hi\u1ec7u quy \u01b0\u1edbc cho g\u1ea1ch b\u00ea t\u00f4ng t\u1ef1 ch\u00e8n \u0111\u01b0\u1ee3c ghi theo th\u1ee9 t\u1ef1: t\u00ean theo h\u00ecnh d\u00e1ng – m\u00e1c g\u1ea1ch – chi\u1ec1u cao – s\u1ed1 hi\u1ec7u ti\u00eau chu\u1ea9n n\u00e0y. V\u00ed d\u1ee5: k\u00fd hi\u1ec7u quy \u01b0\u1edbc h\u00ecnh l\u1ee5c l\u0103ng, m\u00e1c 300, chi\u1ec1u cao 60mm l\u00e0:<\/p>\n

G\u1ea1ch b\u00ea t\u00f4ng t\u1eeb ch\u00e8n – L\u1ee5c l\u0103ng M300 – 60 TCVN 6476 : 1999.<\/p>\n

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

4.1. Y\u00eau c\u1ea7u ngo\u1ea1i quan.<\/p>\n

4.1.1. G\u1ea1ch s\u1ea3n xu\u1ea5t ra c\u00f3 th\u1ec3 c\u00f3 ho\u1eb7c kh\u00f4ng c\u00f3 m\u00e0u trang tr\u00ed. \u0110\u1ed1i v\u1edbi g\u1ea1ch c\u00f3 m\u00e0u trang tr\u00ed \u0111\u1ed9 d\u00e0y l\u1edbp m\u00e0u trang tr\u00ed kh\u00f4ng nh\u1ecf h\u01a1n 7mm v\u00e0 \u0111\u1ed3ng \u0111\u1ec1u trong l\u00f4.<\/p>\n

4.1.2. Khuy\u1ebft t\u1eadt ngo\u1ea1i quan cho ph\u00e9p theo b\u1ea3ng 2.<\/p>\n

B\u1ea3ng 2 – Khuy\u1ebft t\u1eadt ngo\u1ea1i quan cho ph\u00e9p<\/b><\/p>\n\n\n\n\n
T\u00ean khuy\u1ebft t\u1eadt<\/td>\nM\u1ee9c cho ph\u00e9p<\/td>\n<\/tr>\n
1. \u0110\u1ed9 cong v\u00eanh, v\u1ebft l\u00f2i l\u00f5m \u1edf m\u1eb7t vi\u00ean g\u1ea1ch, mm kh\u00f4ng l\u1edbn h\u01a1n<\/p>\n

2. S\u1ed1 v\u1ebft s\u1ee9t v\u00f5 c\u00e1c g\u00f3c c\u1ea1nh s\u00e2u t\u1eeb 2 \u0111\u1ebfn 4mm d\u00e0i t\u1eeb 5 \u0111\u1ebfn 10mm, kh\u00f4ng l\u1edbn h\u01a1n.<\/p>\n

3. S\u1ed1 v\u1ebft n\u1ee9t c\u00f3 chi\u1ec1u d\u00e0i kh\u00f4ng c\u00f3 20 mm, kh\u00f4ng l\u1edbn h\u01a1n<\/td>\n

1<\/p>\n

 <\/p>\n

2<\/p>\n

3<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

C\u00e1c ch\u1ec9 ti\u00eau c\u01a1 l\u00fd.<\/p>\n

2.1. Theo c\u01b0\u1eddng \u0111\u1ed9 n\u00e9n, g\u1ea1ch b\u00ea t\u00f4ng t\u1ef1 ch\u00e8n \u0111\u01b0\u1ee3c s\u1ea3n xu\u1ea5t theo c\u00e1c m\u00e1c sau: M200; M300; M400; M500; M600.<\/p>\n

2.2. C\u00e1c ch\u1ec9 ti\u00eau c\u01a1 l\u00fd c\u1ee7a g\u1ea1ch quy \u0111\u1ecbnh \u1edf b\u1ea3ng 3.<\/p>\n

B\u1ea3ng 3 – C\u00e1c ch\u1ec9 ti\u00eau c\u01a1 l\u00fd<\/b><\/p>\n\n\n\n\n
\n

M\u00e1c g\u1ea1ch<\/b><\/p>\n<\/td>\n

\n

C\u01b0\u1eddng \u0111\u1ed9 n\u00e9n, N\/mm2<\/b><\/p>\n

(KG\/cm2), kh\u00f4ng nh\u1ecf h\u01a1n<\/b><\/p>\n<\/td>\n

\n

\u0110\u1ed9 h\u00fat n\u01b0\u1edbc, %, kh\u00f4ng l\u1edbn h\u01a1n<\/b><\/p>\n<\/td>\n

\n

\u0110\u1ed9 m\u00e0i m\u00f2n, g\/cm2, kh\u00f4ng l\u1edbn h\u01a1n<\/b><\/p>\n<\/td>\n<\/tr>\n

M200<\/p>\n

M300<\/p>\n

M400<\/p>\n

M500<\/p>\n

M600<\/td>\n

20(200)<\/p>\n

30(300)<\/p>\n

40(400)<\/p>\n

50(500)<\/p>\n

60(600)<\/td>\n

10<\/p>\n

8<\/p>\n

8<\/p>\n

6<\/p>\n

6<\/td>\n

0,5<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

 <\/p>\n

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

5.1. L\u1ea5y m\u1eabu.<\/p>\n

M\u1eabu th\u1eed \u0111\u01b0\u1ee3c l\u1ea5y theo l\u00f4, L\u00f4 l\u00e0 m\u1ed9t s\u1ed1 l\u01b0\u1ee3ng g\u1ea1ch c\u00f3 c\u00f9ng h\u00ecnh d\u00e1ng, k\u00edch th\u01b0\u1edbc, m\u00e0u s\u1eafc \u0111\u01b0\u1ee3c s\u1ea3n xu\u1ea5t v\u1edbi c\u00f9ng lo\u1ea1i h\u1ed5n h\u1ee3p ph\u1ed1i li\u1ec7u v\u00e0 trong m\u1ed9t th\u1eddi gian li\u00ean t\u1ee5c. C\u1edf l\u00f4 th\u00f4ng th\u01b0\u1eddng kh\u00f4ng l\u1edbn h\u01a1n 15.000 vi\u00ean.<\/p>\n

L\u1ea5y 15 vi\u00ean b\u1ea5t k\u1ef3 \u1edf c\u00e1c v\u1ecb tr\u00ed kh\u00e1c nhau trong l\u00f4, sao cho m\u1eabu \u0111\u1ea1i di\u1ec7n cho c\u1ea3 l\u00f4 \u0111\u00f3.<\/p>\n

5.2. Ki\u1ec3m tra k\u00edch th\u01b0\u1edbc v\u00e0 khuy\u1ebft t\u00e2t ngo\u1ea1i quan.<\/p>\n

Ki\u1ec3m tra k\u00edch th\u01b0\u1edbc v\u00e0 khuy\u1ebft t\u00e2t ngo\u1ea1i quan tr\u00ean to\u00e0n b\u1ed9 s\u1ed1 l\u00f4 m\u1eabu l\u1ea5y ra theo \u0111i\u1ec1u 5.1.<\/p>\n

5.2.1. D\u00f9ng th\u01b0\u1edbc l\u00e1 \u0111o c\u00e1c chi\u1ebfu vi\u00ean g\u1ea1ch, ch\u00ednh x\u00e1c t\u1edbi mm, k\u1ebft qu\u1ea3 l\u00e0 gi\u00e1 tr\u1ecb trung b\u00ecnh c\u1ed9ng c\u1ee7a 4 l\u1ea7n \u0111o \u1edf 4 c\u1ea1nh thu\u1ed9c v\u1ec1 m\u1ed5i chi\u1ec1u.<\/p>\n

5.2.2. \u0110\u1ed9 cong v\u00eanh v\u00e0 v\u1ebft l\u1ed3i l\u00f5m b\u1ec1 m\u1eb7t l\u00e0 khe h\u1edf l\u1edbn nh\u1ea5t t\u1ea1o th\u00e0nh khi \u00e9p s\u00e1t c\u1ea1nh c\u1ee7a th\u01b0\u1edbc l\u00ean b\u1ec1 m\u1eb7t c\u1ea7n ki\u1ec3m tra.<\/p>\n

5.2.3. C\u00e1c v\u1ebft n\u1ee9t v\u00e0 v\u1ebft s\u1ee9t \u0111\u01b0\u1ee3c \u0111\u1ebfm v\u00e0 quan s\u00e1t b\u1eb1ng m\u1eaft th\u01b0\u1eddng. D\u00f9ng th\u01b0\u1edbc l\u00e1 \u0111o chi\u1ec1u d\u00e0i v\u1ebft n\u1ee9t, v\u1ebft s\u1ee9t ch\u00ednh x\u00e1c \u0111\u1ebfn 1mm.<\/p>\n

5.2.4. \u0110\u1ed9 \u0111\u1ed3ng \u0111\u1ec1u m\u00e0u s\u1eafc m\u1eb7t vi\u00ean g\u1ea1ch \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh b\u1eb1ng c\u00e1ch \u0111\u1ec3 m\u1eabu c\u00f3 m\u00e0u chu\u1ea9n \u1edf gi\u1eefa c\u00e1c vi\u00ean g\u1ea1ch. Quan s\u00e1t b\u1eb1ng m\u1eaft th\u01b0\u1eddng \u1edf kho\u1ea3ng c\u00e1ch 1,5m<\/p>\n

5.3. X\u00e1c \u0111\u1ecbnh c\u00e1c ch\u1ec9 ti\u00eau c\u01a1 l\u00fd.<\/p>\n

C\u00e1c ch\u1ec9 ti\u00eau c\u01a1 l\u00fd \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh khi m\u1eabu \u0111\u00e3 \u0111\u1ee7 28 ng\u00e0y k\u1ec3 t\u1eeb ng\u00e0y s\u1ea3n xu\u1ea5t.<\/p>\n

5.3.1. X\u00e1c \u0111\u1ecbnh c\u01b0\u1eddng \u0111\u1ed9 n\u00e9n.<\/p>\n

5.3.1.1. Nguy\u00ean t\u1eafc.<\/p>\n

\u0110\u1eb7t m\u00e1 \u00e9p v\u00e0 m\u1eabu th\u1eed l\u00ean th\u1edbt d\u01b0\u1edbi c\u1ee7a m\u00e1y v\u00e0 n\u00e9n \u0111\u1ebfn khi m\u1eabu ph\u00e1 hu\u1ef7. T\u1eeb l\u1ef1c ph\u00e1 hu\u1ef7 v\u00e0 di\u1ec7n t\u00edch ch\u1ecbu n\u00e9n, t\u00ednh c\u01b0\u1eddng \u0111\u1ed9 n\u00e9n.<\/p>\n

5.3.1.2. D\u1ee5ng c\u1ee5 v\u00e0 thi\u1ebft b\u1ecb th\u1eed.<\/p>\n

– Th\u01b0\u1edbc l\u00e1 b\u1ea3ng kim lo\u1ea1i c\u00f3 v\u1ea1ch chia \u0111\u1ebfn 1mm.<\/p>\n

– C\u00e1c mi\u1ebfng k\u00ednh \u0111\u1ec3 l\u00e0 ph\u1eb3ng m\u1eb7t v\u1eefa tr\u00e1t m\u1eabu.<\/p>\n

– Bay ch\u1ea3o \u0111\u1ec3 h\u1ed3 tr\u1ed9n xi m\u0103ng.<\/p>\n

– M\u00e1y n\u00e9n c\u00f3 thang l\u1ef1c th\u00edch h\u1ee3p \u0111\u1ec3 khi n\u00e9n t\u1ea3i tr\u1ecdng ph\u00e1 ho\u1ea1i n\u1eb1m trong kho\u1ea3ng 20% \u0111\u1ebfn 80% t\u1ea3i tr\u1ecdng l\u1edbn nh\u1ea5t c\u1ee7a thang l\u1ef1c n\u00e9n \u0111\u00e3 ch\u1ecdn, kh\u00f4ng \u0111\u01b0\u1ee3c n\u00e9n m\u1eabu ngo\u00e0i thang l\u1ef1c tr\u00ean.<\/p>\n

– B\u1ed9 m\u00e1 \u00e9p b\u1eb1ng th\u00e9p c\u00f3 c\u00e1c k\u00edch th\u01b0\u1edbc.<\/p>\n

+ Chi\u1ec1u d\u00e0i: 120mm\u00a0\u00b1\u00a00,2mm;<\/p>\n

+ Chi\u1ec1u r\u1ed9ng: 60mm\u00a0\u00b1\u00a00,2mm;<\/p>\n

+ Chi\u1ec1u d\u00e0y: Kh\u00f4ng nh\u1ecf h\u01a1n 15mm.<\/p>\n

5.3.1.3. Chu\u1ea9n b\u1ecb m\u1eabu th\u1eed.<\/p>\n

M\u1eabu th\u1eed l\u00e0 15 vi\u00ean g\u1ea1ch nguy\u00ean, l\u1ea5y theo \u0111i\u1ec1u 5.1.<\/p>\n

D\u00f9ng xi m\u0103ng n\u00f3n h\u1ee3p theo TCVN 6260 : 1997 v\u00e0 n\u01b0\u1edbc \u0111\u1ec3 tr\u1ed9n h\u1ed3 xi m\u0103ng c\u00f3 \u0111\u1ed9 d\u1ebbo ti\u00eau chu\u1ea9n.<\/p>\n

M\u1eb7t ch\u1ecbu n\u00e9n l\u00e0 m\u1eb7t tr\u00ean v\u00e0 m\u1eb7t d\u01b0\u1edbi vi\u00ean g\u1ea1ch. Tr\u00e1t m\u00e1i xi m\u0103ng l\u00ean hai m\u00e1i ch\u1ecbu n\u00e9n. D\u00f9ng c\u00e1c mi\u1ebfng k\u00ednh \u0111\u1ec3 l\u00e0 ph\u1eb3ng h\u1ed3 xi m\u0103ng sao cho kh\u00f4ng c\u00f2n v\u1ebft l\u00f5m v\u00e0 b\u1ecdt kh\u00ed. Chi\u1ec1u d\u00e0y l\u1edbp h\u1ed3 xi m\u0103ng kh\u00f4ng l\u1edbn h\u01a1n 2mm. Hai m\u1eb7t tr\u00e1t ph\u1ea3i ph\u1eb3ng v\u00e0 song song nhau.<\/p>\n

Sau khi tr\u00e1t m\u1eabu \u0111\u01b0\u1ee3c \u0111\u1eb7t trong ph\u00f2ng th\u00ed nghi\u1ec7m kh\u00f4ng \u00edt h\u01a1n 72 gi\u1edd r\u1ed3i \u0111em th\u1eed. Khi n\u00e9n, m\u1eabu \u1edf tr\u1ea1ng th\u00e1i \u1ea9m t\u1ef1 nhi\u00ean. Khi c\u1ea7n th\u1eed nhanh c\u00f3 th\u1ec3 d\u00f9ng xi m\u0103ng nh\u00f4m ho\u1eb7c th\u1ea1ch cao khan \u0111\u1ec3 tr\u00e1t m\u1eb7t m\u1eabu. Sau \u0111\u00f3 m\u1eabu th\u1eed \u0111\u01b0\u1ee3c \u0111\u1eb7t trong ph\u00f2ng th\u00ed nghi\u1ec7m kh\u00f4ng \u00edt h\u01a1n 16 gi\u1edd r\u1ed3i \u0111em th\u1eed.<\/p>\n

5.3.1.4. Ti\u1ebfn h\u00e0nh th\u1eed.<\/p>\n

\u00e1p hai m\u00e1 \u00e9p v\u00e0o m\u1eb7t tr\u00ean v\u00e0 m\u1eb7t d\u01b0\u1edbi m\u1eabu th\u1eed v\u00e0 \u0111\u1eb7t l\u00ean th\u1edbt d\u01b0\u1edbi c\u1ee7a m\u00e1y n\u00e9n sao cho t\u00e2m hai m\u00e1 \u00e9p tr\u00f9ng v\u1edbi t\u00e2m th\u1edbt n\u00e9n. T\u1ed1c \u0111\u1ed9 t\u0103ng t\u1ea3i ph\u1ea3i \u0111\u1ec1u v\u00e0 b\u1eb1ng 0,6 N\/mm2\u00a0\u00b1\u00a00,2 N\/ mm2 trong 1 gi\u00e2y.<\/p>\n

5.3.1.5. \u0110\u00e1nh gi\u00e1 k\u1ebft qu\u1ea3.<\/p>\n

C\u01b0\u1eddng \u0111\u1ed9 n\u00e9n R c\u1ee7a m\u1eabu th\u1eed \u0111\u01b0\u1ee3c t\u00ednh b\u1eb1ng N\/ mm2 theo c\u00f4ng th\u1ee9c.<\/p>\n

R =\u00a0a\u00a0x P\/S<\/p>\n

Trong \u0111\u00f3:<\/p>\n

P: L\u00e0 l\u1ef1c n\u00e9n ph\u00e1 hu\u1ef7 m\u1eabu, t\u00ednh b\u1eb1ng Niut\u01a1n.<\/p>\n

S: Di\u1ec7n t\u00edch m\u00e1 \u00e9p, t\u00ednh b\u1eb1ng mm2<\/p>\n

a: L\u00e0 h\u1ec7 s\u1ed1 ph\u1ee5 thu\u1ed9c chi\u1ec1u cao m\u1eabu th\u1eed.<\/p>\n

Tu\u1ef3 theo chi\u1ec1u cao m\u1eabu th\u1eed, gi\u00e1 tr\u1ecb\u00a0a\u00a0\u0111\u01b0\u1ee3c l\u1ea5y nh\u01b0 sau:<\/p>\n

a\u00a0= 1,00 Khi chi\u1ec1u cao m\u1eabu th\u1eed nh\u1ecf h\u01a1n 70 mm.<\/p>\n

a\u00a0= 1,20 Khi chi\u1ec1u cao m\u1eabu b\u1eb1ng h\u01a1n 70 mm \u0111\u1ebfn 90 mm.<\/p>\n

a\u00a0= 1,18 Khi chi\u1ec1u cao m\u1eabu th\u1eed l\u1edbn h\u01a1n 90mm.<\/p>\n

T\u00ednh trung b\u00ecnh c\u1ed9ng c\u00e1c k\u1ebft qu\u1ea3 th\u1eed, lo\u1ea1i b\u1ecf c\u00e1c gi\u00e1 tr\u1ecb c\u00f3 sai l\u1ec7ch l\u1edbn h\u01a1n 15% so v\u1edbi gi\u00e1 tr\u1ecb trung b\u00ecnh. K\u1ebft qu\u1ea3 cu\u1ed1i c\u00f9ng l\u00e0 gi\u00e1 tr\u1ecb trung b\u00ecnh c\u1ed9ng c\u1ee7a c\u00e1c gi\u00e1 tr\u1ecb h\u1ee3p l\u1ec7 c\u00f2n l\u1ea1i ch\u00ednh x\u00e1c t\u1edbi 0,1 N\/mm2.<\/p>\n

5.3.2. X\u00e1c \u0111\u1ecbnh \u0111\u1ed9 h\u00fat n\u01b0\u1edbc theo TCVN 6355 : 1998<\/p>\n

5.3.3. X\u00e1c \u0111\u1ecbnh \u0111\u1ed9 m\u00e0i m\u00f2n theo TCVN 6065 : 1995<\/p>\n

6. Ghi nh\u00e3n – B\u1ea3o qu\u1ea3n:<\/b><\/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 6476:1999 v\u1ec1 g\u1ea1ch b\u00ea t\u00f4ng t\u1ef1 ch\u00e8n TI\u00caU CHU\u1ea8N VI\u1ec6T\u00a0NAM TCVN 6476:1999 G\u1ea0CH B\u00ca T\u00d4NG T\u1ef0 CH\u00c8N Interlocking concrete bricks 1. Ph\u1ea1m vi \u00e1p d\u1ee5ng. Ti\u00eau chu\u1ea9n n\u00e0y \u00e1p d\u1ee5ng cho g\u1ea1ch b\u00ea t\u00f4ng t\u1ef1 ch\u00e8n \u0111\u01b0\u1ee3c s\u1ea3n xu\u1ea5t theo ph\u01b0\u01a1ng ph\u00e1p rung \u00e9p t\u1eeb h\u1ed5n…<\/p>\n","protected":false},"author":1,"featured_media":7975,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-7974","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-tin-tuc"],"_links":{"self":[{"href":"https:\/\/tailieuxaydung.net\/index.php?rest_route=\/wp\/v2\/posts\/7974","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=7974"}],"version-history":[{"count":2,"href":"https:\/\/tailieuxaydung.net\/index.php?rest_route=\/wp\/v2\/posts\/7974\/revisions"}],"predecessor-version":[{"id":7977,"href":"https:\/\/tailieuxaydung.net\/index.php?rest_route=\/wp\/v2\/posts\/7974\/revisions\/7977"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/tailieuxaydung.net\/index.php?rest_route=\/wp\/v2\/media\/7975"}],"wp:attachment":[{"href":"https:\/\/tailieuxaydung.net\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=7974"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/tailieuxaydung.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=7974"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/tailieuxaydung.net\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=7974"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}