{"id":9256,"date":"2025-08-01T13:29:47","date_gmt":"2025-08-01T06:29:47","guid":{"rendered":"https:\/\/dufago.com.vn\/?p=9256"},"modified":"2026-01-08T13:57:22","modified_gmt":"2026-01-08T06:57:22","slug":"be-tong-mac-250-dinh-nghia-cap-phoi-ty-le-tron-va-bao-gia-moi-nhat","status":"publish","type":"post","link":"https:\/\/dufago.com.vn\/en\/be-tong-mac-250-dinh-nghia-cap-phoi-ty-le-tron-va-bao-gia-moi-nhat\/","title":{"rendered":"B\u00ea t\u00f4ng m\u00e1c 250: \u0110\u1ecbnh ngh\u0129a, c\u1ea5p ph\u1ed1i, t\u1ef7 l\u1ec7 tr\u1ed9n v\u00e0 b\u00e1o gi\u00e1 m\u1edbi nh\u1ea5t"},"content":{"rendered":"

B\u00ea t\u00f4ng m\u00e1c 250 l\u00e0 lo\u1ea1i b\u00ea t\u00f4ng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng ph\u1ed5 bi\u1ebfn trong c\u00e1c c\u00f4ng tr\u00ecnh d\u00e2n d\u1ee5ng nh\u01b0 nh\u00e0 \u1edf, \u0111\u01b0\u1eddng n\u1ed9i b\u1ed9, m\u00f3ng nh\u00e0 nh\u1ecf\u2026 nh\u1edd kh\u1ea3 n\u0103ng ch\u1ecbu l\u1ef1c t\u1ed1t v\u00e0 gi\u00e1 th\u00e0nh h\u1ee3p l\u00fd. Trong b\u00e0i vi\u1ebft n\u00e0y, ch\u00fang t\u00f4i s\u1ebd gi\u00fap b\u1ea1n hi\u1ec3u r\u00f5 b\u00ea t\u00f4ng m\u00e1c 250 l\u00e0 g\u00ec, \u0111\u1ecbnh m\u1ee9c c\u1ea5p ph\u1ed1i ra sao v\u00e0 c\u1eadp nh\u1eadt b\u00e1o gi\u00e1 m\u1edbi nh\u1ea5t 2025.<\/span><\/strong><\/p>\n

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B\u00ea t\u00f4ng m\u00e1c 250: \u0110\u1ecbnh ngh\u0129a, c\u1ea5p ph\u1ed1i, t\u1ef7 l\u1ec7 tr\u1ed9n v\u00e0 b\u00e1o gi\u00e1 m\u1edbi nh\u1ea5t<\/figcaption><\/figure>\n

What is grade 250 concrete?<\/span><\/strong><\/h2>\n

\u0110\u1ecbnh ngh\u0129a chi ti\u1ebft v\u1ec1 m\u00e1c b\u00ea t\u00f4ng<\/span><\/strong><\/h3>\n

M\u00e1c b\u00ea t\u00f4ng l\u00e0 ch\u1ec9 s\u1ed1 quan tr\u1ecdng th\u1ec3 hi\u1ec7n kh\u1ea3 n\u0103ng ch\u1ecbu n\u00e9n c\u1ee7a m\u1eabu b\u00ea t\u00f4ng sau 28 ng\u00e0y \u0111\u01b0\u1ee3c b\u1ea3o d\u01b0\u1ee1ng trong \u0111i\u1ec1u ki\u1ec7n ti\u00eau chu\u1ea9n. \u0110\u01a1n v\u1ecb \u0111o l\u01b0\u1eddng c\u1ee7a m\u00e1c b\u00ea t\u00f4ng l\u00e0 kg\/cm\u00b2.<\/span><\/p>\n

– M\u1eabu th\u1eed ti\u00eau chu\u1ea9n th\u01b0\u1eddng l\u00e0 m\u1ed9t kh\u1ed1i l\u1eadp ph\u01b0\u01a1ng k\u00edch th\u01b0\u1edbc 15\u00d715\u00d715 cm.<\/span><\/p>\n

– Con s\u1ed1 “m\u00e1c” c\u00e0ng cao, c\u01b0\u1eddng \u0111\u1ed9 ch\u1ecbu n\u00e9n<\/a><\/strong> c\u1ee7a b\u00ea t\u00f4ng c\u00e0ng l\u1edbn, \u0111\u1ed3ng ngh\u0129a v\u1edbi vi\u1ec7c b\u00ea t\u00f4ng c\u00e0ng c\u1ee9ng v\u00e0 b\u1ec1n.<\/span><\/p>\n

M\u00e1c 250 ngh\u0129a l\u00e0 g\u00ec?<\/span><\/strong><\/h3>\n

Theo \u0111\u1ecbnh ngh\u0129a tr\u00ean, b\u00ea t\u00f4ng m\u00e1c 250 l\u00e0 lo\u1ea1i b\u00ea t\u00f4ng c\u00f3 c\u01b0\u1eddng \u0111\u1ed9 ch\u1ecbu n\u00e9n t\u1ed1i thi\u1ec3u \u0111\u1ea1t 250 kg\/cm\u00b2 sau 28 ng\u00e0y. \u0110\u00e2y l\u00e0 m\u1ed9t m\u00e1c b\u00ea t\u00f4ng c\u00f3 \u0111\u1ed9 b\u1ec1n kh\u00e1 cao, th\u00edch h\u1ee3p cho nhi\u1ec1u h\u1ea1ng m\u1ee5c ch\u1ecbu l\u1ef1c ch\u00ednh c\u1ee7a c\u00f4ng tr\u00ecnh.<\/span><\/p>\n

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\u1ee8ng d\u1ee5ng c\u1ee7a b\u00ea t\u00f4ng m\u00e1c 250<\/span><\/strong><\/h3>\n

Nh\u1edd c\u01b0\u1eddng \u0111\u1ed9 ch\u1ecbu n\u00e9n t\u1ed1t, b\u00ea t\u00f4ng m\u00e1c 250 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i trong nhi\u1ec1u h\u1ea1ng m\u1ee5c c\u00f4ng tr\u00ecnh, bao g\u1ed3m:<\/span><\/p>\n

– C\u00f4ng tr\u00ecnh d\u00e2n d\u1ee5ng:<\/strong> \u0110\u01b0\u1ee3c d\u00f9ng cho c\u00e1c c\u1ea5u ki\u1ec7n ch\u1ecbu l\u1ef1c quan tr\u1ecdng nh\u01b0 m\u00f3ng, d\u1ea7m, s\u00e0n, c\u1ed9t, t\u01b0\u1eddng ch\u1eafn c\u1ee7a nh\u00e0 \u1edf d\u00e2n d\u1ee5ng (nh\u00e0 ph\u1ed1, bi\u1ec7t th\u1ef1, nh\u00e0 c\u1ea5p 4 c\u00f3 t\u1eeb 2-4 t\u1ea7ng).<\/span><\/p>\n

– C\u00f4ng tr\u00ecnh c\u00f4ng nghi\u1ec7p v\u00e0 h\u1ea1 t\u1ea7ng:<\/strong> Ngo\u00e0i ra, b\u00ea t\u00f4ng m\u00e1c 250 c\u00f2n \u0111\u01b0\u1ee3c d\u00f9ng cho c\u00e1c c\u00f4ng tr\u00ecnh nh\u01b0 n\u1ec1n nh\u00e0 x\u01b0\u1edfng, \u0111\u01b0\u1eddng n\u1ed9i b\u1ed9, m\u01b0\u01a1ng tho\u00e1t n\u01b0\u1edbc, v\u1ec9a h\u00e8,…<\/span><\/p>\n

Th\u00e0nh ph\u1ea7n v\u00e0 \u0111\u1ecbnh m\u1ee9c c\u1ea5p ph\u1ed1i b\u00ea t\u00f4ng m\u00e1c 250<\/span><\/strong><\/h2>\n

C\u1ea5p ph\u1ed1i b\u00ea t\u00f4ng l\u00e0 g\u00ec?<\/span><\/strong><\/span><\/h3>\n

C\u1ea5p ph\u1ed1i b\u00ea t\u00f4ng l\u00e0 t\u1ef7 l\u1ec7 pha tr\u1ed9n ch\u00ednh x\u00e1c gi\u1eefa c\u00e1c th\u00e0nh ph\u1ea7n c\u01a1 b\u1ea3n: xi m\u0103ng, c\u00e1t, \u0111\u00e1, v\u00e0 n\u01b0\u1edbc \u0111\u1ec3 t\u1ea1o ra m\u1ed9t h\u1ed7n h\u1ee3p b\u00ea t\u00f4ng \u0111\u1ea1t c\u01b0\u1eddng \u0111\u1ed9 v\u00e0 c\u00e1c t\u00ednh ch\u1ea5t mong mu\u1ed1n. C\u1ea5p ph\u1ed1i kh\u00f4ng ch\u1ec9 quy\u1ebft \u0111\u1ecbnh c\u01b0\u1eddng \u0111\u1ed9 ch\u1ecbu l\u1ef1c m\u00e0 c\u00f2n \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn \u0111\u1ed9 d\u1ebbo, \u0111\u1ed9 s\u1ee5t v\u00e0 t\u00ednh kinh t\u1ebf c\u1ee7a b\u00ea t\u00f4ng.<\/span><\/p>\n

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\u0110\u1ecbnh m\u1ee9c c\u1ea5p ph\u1ed1i tham kh\u1ea3o cho 1m\u00b3 b\u00ea t\u00f4ng m\u00e1c 250<\/span><\/strong><\/h3>\n

C\u00e1c s\u1ed1 li\u1ec7u d\u01b0\u1edbi \u0111\u00e2y ch\u1ec9 l\u00e0 \u0111\u1ecbnh m\u1ee9c tham kh\u1ea3o theo ti\u00eau chu\u1ea9n TCVN, c\u00f3 th\u1ec3 \u0111i\u1ec1u ch\u1ec9nh t\u00f9y thu\u1ed9c v\u00e0o lo\u1ea1i v\u1eadt li\u1ec7u, \u0111\u1ed9 \u1ea9m c\u1ee7a c\u00e1t \u0111\u00e1 v\u00e0 y\u00eau c\u1ea7u c\u1ee5 th\u1ec3 c\u1ee7a t\u1eebng c\u00f4ng tr\u00ecnh.<\/span><\/p>\n

\u0110\u1ecbnh m\u1ee9c v\u1edbi xi m\u0103ng PCB30 v\u00e0 \u0111\u00e1 1×2:<\/span><\/strong><\/h4>\n\n\n\n\n\n\n\n\n
Th\u00e0nh ph\u1ea7n<\/th>\nKh\u1ed1i l\u01b0\u1ee3ng<\/th>\n<\/tr>\n
Xi m\u0103ng PCB30<\/td>\n356<\/td>\n<\/tr>\n
C\u00e1t v\u00e0ng<\/td>\n495<\/td>\n<\/tr>\n
\u0110\u00e1 1×2<\/td>\n808<\/td>\n<\/tr>\n
N\u01b0\u1edbc<\/td>\n183<\/td>\n<\/tr>\n
Ph\u1ee5 gia (n\u1ebfu c\u00f3)<\/td>\nt\u00f9y ch\u1ecdn<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u0110\u1ecbnh m\u1ee9c v\u1edbi xi m\u0103ng PCB40 v\u00e0 \u0111\u00e1 1×2:<\/span><\/strong><\/h4>\n\n\n\n\n\n\n\n
Th\u00e0nh ph\u1ea7n<\/th>\nKh\u1ed1i l\u01b0\u1ee3ng<\/th>\n<\/tr>\n
Xi m\u0103ng PCB40<\/td>\n285<\/td>\n<\/tr>\n
C\u00e1t v\u00e0ng<\/td>\n517<\/td>\n<\/tr>\n
\u0110\u00e1 1×2<\/td>\n844<\/td>\n<\/tr>\n
N\u01b0\u1edbc<\/td>\n175<\/td>\n<\/tr>\n
Ph\u1ee5 gia (n\u1ebfu c\u00f3)<\/td>\nt\u00f9y ch\u1ecdn<\/td>\n<\/tr>\n<\/table>\n

C\u01b0\u1eddng \u0111\u1ed9 ch\u1ecbu n\u00e9n v\u00e0 th\u1eddi gian \u0111\u00f4ng k\u1ebft b\u00ea t\u00f4ng m\u00e1c 250<\/b><\/span><\/h2>\n

C\u01b0\u1eddng \u0111\u1ed9 ch\u1ecbu n\u00e9n v\u00e0 C\u1ea5p \u0111\u1ed9 b\u1ec1n (B)<\/span><\/strong><\/h3>\n

\u0110\u00e2y l\u00e0 m\u1ed9t m\u00e1c b\u00ea t\u00f4ng ph\u1ed5 bi\u1ebfn, th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng cho c\u00e1c h\u1ea1ng m\u1ee5c ch\u1ecbu l\u1ef1c ch\u00ednh c\u1ee7a c\u00f4ng tr\u00ecnh d\u00e2n d\u1ee5ng v\u00e0 c\u00f4ng nghi\u1ec7p c\u00f3 t\u1ea3i tr\u1ecdng trung b\u00ecnh nh\u01b0: m\u00f3ng, c\u1ed9t, d\u1ea7m, s\u00e0n.<\/span><\/p>\n

M250 ngh\u0129a l\u00e0 c\u01b0\u1eddng \u0111\u1ed9 ch\u1ecbu n\u00e9n t\u1ed1i thi\u1ec3u c\u1ee7a m\u1eabu b\u00ea t\u00f4ng h\u00ecnh l\u1eadp ph\u01b0\u01a1ng k\u00edch th\u01b0\u1edbc 15\u00d715\u00d715cm \u0111\u1ea1t 250kg\/cm2 (t\u01b0\u01a1ng \u0111\u01b0\u01a1ng 25MPa – Megapascal) sau 28 ng\u00e0y.<\/span><\/p>\n

Quy \u0111\u1ed5i sang C\u1ea5p \u0111\u1ed9 b\u1ec1n (B) theo ti\u00eau chu\u1ea9n hi\u1ec7n h\u00e0nh (TCVN 5574:2018): B\u00ea t\u00f4ng m\u00e1c M250 t\u01b0\u01a1ng \u0111\u01b0\u01a1ng v\u1edbi c\u1ea5p \u0111\u1ed9 b\u1ec1n B20, trong \u0111\u00f3 B20 l\u00e0 c\u01b0\u1eddng \u0111\u1ed9 \u0111\u1eb7c tr\u01b0ng ch\u1ecbu n\u00e9n 20MPa (v\u1edbi x\u00e1c su\u1ea5t \u0111\u1ea3m b\u1ea3o 0.95).<\/span><\/p>\n

C\u01b0\u1eddng \u0111\u1ed9 ch\u1ecbu n\u00e9n v\u00e0 C\u1ea5p \u0111\u1ed9 b\u1ec1n (B)
\n<\/span><\/strong><\/h3>\n

C\u01b0\u1eddng \u0111\u1ed9 b\u00ea t\u00f4ng d\u1ea7n theo th\u1eddi gian:<\/span><\/p>\n