{"id":2410,"date":"2020-08-05T09:20:23","date_gmt":"2020-08-05T02:20:23","guid":{"rendered":"https:\/\/dufago.com.vn\/?page_id=2410"},"modified":"2026-03-18T09:55:31","modified_gmt":"2026-03-18T02:55:31","slug":"be-tong-cuong-do-cao","status":"publish","type":"page","link":"https:\/\/dufago.com.vn\/en\/be-tong-cuong-do-cao\/","title":{"rendered":"HIGH STRENGTH CONCRETE"},"content":{"rendered":"
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HIGH STRENGTH CONCRETE<\/h3>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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\n\t\t\t\n\t\t\t\t\t\t\n\t\t\t\t\t\tREADY MIXED CONCRETE<\/span>\n\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t
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\n\t\t\t\n\t\t\t\t\t\t\n\t\t\t\t\t\tSUPPLY OF BUILDING MATERIALS<\/span>\n\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
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B\u00ea t\u00f4ng c\u01b0\u1eddng \u0111\u1ed9 cao Dufago \u2014 D\u1ecbch v\u1ee5 \u0111\u1ed5 b\u00ea t\u00f4ng ch\u1ecbu l\u1ef1c cao cho c\u00f4ng tr\u00ecnh<\/strong><\/span><\/h1>

Thi\u1ebft k\u1ebf y\u00eau c\u1ea7u b\u00ea t\u00f4ng c\u01b0\u1eddng \u0111\u1ed9 cao C60\u2013C70 nh\u01b0ng nh\u00e0 cung c\u1ea5p \u0111\u1ecba ph\u01b0\u01a1ng ch\u1ec9 \u0111\u00e1p \u1ee9ng \u0111\u1ebfn C40? \u0110\u00e2y l\u00e0 b\u00e0i to\u00e1n nhi\u1ec1u nh\u00e0 th\u1ea7u thi c\u00f4ng c\u1ea7u, nh\u00e0 cao t\u1ea7ng v\u00e0 c\u1ea5u ki\u1ec7n d\u1ef1 \u1ee9ng l\u1ef1c t\u1ea1i Mi\u1ec1n Trung g\u1eb7p ph\u1ea3i, khi y\u00eau c\u1ea7u k\u1ef9 thu\u1eadt v\u01b0\u1ee3t kh\u1ea3 n\u0103ng c\u1ea5p ph\u1ed1i th\u00f4ng th\u01b0\u1eddng.<\/span><\/strong><\/p>

Trong th\u1ef1c t\u1ebf, \u0111\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c c\u00e1c m\u00e1c b\u00ea t\u00f4ng t\u1eeb C50 tr\u1edf l\u00ean, c\u1ea7n ki\u1ec3m so\u00e1t ch\u1eb7t ch\u1ebd t\u1eeb v\u1eadt li\u1ec7u, ph\u1ee5 gia \u0111\u1ebfn quy tr\u00ecnh s\u1ea3n xu\u1ea5t. \u0110\u00e2y c\u0169ng l\u00e0 \u0111i\u1ec3m kh\u00e1c bi\u1ec7t gi\u1eefa b\u00ea t\u00f4ng c\u01b0\u1eddng \u0111\u1ed9 cao v\u00e0 b\u00ea t\u00f4ng th\u00f4ng th\u01b0\u1eddng m\u00e0 kh\u00f4ng ph\u1ea3i tr\u1ea1m tr\u1ed9n n\u00e0o c\u0169ng \u0111\u00e1p \u1ee9ng \u0111\u01b0\u1ee3c.<\/span><\/strong><\/p>

B\u00ea t\u00f4ng c\u01b0\u1eddng \u0111\u1ed9 cao l\u00e0 g\u00ec? Ph\u00e2n bi\u1ec7t HSC, HPC v\u00e0 UHPC<\/span><\/strong><\/h2>

B\u00ea t\u00f4ng c\u01b0\u1eddng \u0111\u1ed9 cao l\u00e0 lo\u1ea1i b\u00ea t\u00f4ng c\u00f3 c\u01b0\u1eddng \u0111\u1ed9 ch\u1ecbu n\u00e9n \u0111\u1eb7c tr\u01b0ng t\u1eeb C50 (50 MPa) tr\u1edf l\u00ean sau 28 ng\u00e0y, theo ti\u00eau chu\u1ea9n TCVN. \u0110\u1ec3 \u0111\u1ea1t c\u01b0\u1eddng \u0111\u1ed9 n\u00e0y, b\u00ea t\u00f4ng c\u01b0\u1eddng \u0111\u1ed9 cao b\u1eaft bu\u1ed9c s\u1eed d\u1ee5ng ph\u1ee5 gia si\u00eau d\u1ebbo (Superplasticizer) \u0111\u1ec3 gi\u1ea3m t\u1ef7 l\u1ec7 n\u01b0\u1edbc\/xi m\u0103ng (w\/c) xu\u1ed1ng \u2264 0.38 \u2014 th\u1ea5p h\u01a1n nhi\u1ec1u so v\u1edbi b\u00ea t\u00f4ng th\u01b0\u1eddng.<\/span><\/p>

Ph\u00e2n bi\u1ec7t HSC, HPC v\u00e0 UHPC<\/span><\/strong><\/span><\/p>

\u0110i\u1ec3m kh\u00e1c bi\u1ec7t c\u1ed1t l\u00f5i c\u1ee7a 3 c\u00e1i t\u00ean hay b\u1ecb nh\u1ea7m l\u1eabn nh\u1ea5t \u0111\u01b0\u1ee3c tham kh\u1ea3o t\u1ea1i ACI 363 (American Concrete Institute)<\/a><\/strong>.<\/span><\/p>
Lo\u1ea1i<\/th>T\u00ean \u0111\u1ea7y \u0111\u1ee7<\/th>C\u01b0\u1eddng \u0111\u1ed9<\/th>\u0110\u1eb7c \u0111i\u1ec3m ch\u00ednh<\/th><\/tr>
HSC<\/td>High Strength Concrete<\/td>50\u2013100 MPa (C50\u2013C80)<\/td>Ph\u1ee5 gia si\u00eau d\u1ebbo, w\/c th\u1ea5p, c\u1ed1t li\u1ec7u tuy\u1ec3n ch\u1ecdn<\/td><\/tr>
HPC<\/td>High Performance Concrete<\/td>55\u2013120 MPa (C60+)<\/td>HSC + \u0111\u1ed9 b\u1ec1n cao, ch\u1ed1ng th\u1ea5m, ch\u1ed1ng \u0103n m\u00f2n v\u01b0\u1ee3t tr\u1ed9i<\/td><\/tr>
UHPC<\/td>Ultra High Performance Concrete<\/td>120\u2013250 MPa<\/td>Th\u00eam s\u1ee3i kim lo\u1ea1i, silica fume, kh\u00f4ng c\u00f3 c\u1ed1t li\u1ec7u th\u00f4<\/td><\/tr><\/tbody><\/table>

So s\u00e1nh b\u00ea t\u00f4ng c\u01b0\u1eddng \u0111\u1ed9 cao v\u1edbi b\u00ea t\u00f4ng th\u01b0\u1eddng<\/span><\/strong><\/h2>

B\u00ea t\u00f4ng c\u01b0\u1eddng \u0111\u1ed9 cao l\u00e0 m\u1ed9t lo\u1ea1i b\u00ea t\u00f4ng \u0111\u1eb7c bi\u1ec7t \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c c\u01b0\u1eddng \u0111\u1ed9 ch\u1ecbu n\u00e9n cao v\u01b0\u1ee3t tr\u1ed9i so v\u1edbi c\u00e1c lo\u1ea1i b\u00ea t\u00f4ng th\u00f4ng th\u01b0\u1eddng.<\/span><\/p>

\u0110i\u1ec3m \u0111\u00e1ng ch\u00fa \u00fd l\u00e0 Dufago t\u1ed1i \u01b0u h\u00f3a h\u00e0m l\u01b0\u1ee3ng xi m\u0103ng s\u1eed d\u1ee5ng trong qu\u00e1 tr\u00ecnh s\u1ea3n xu\u1ea5t, gi\u00fap gi\u1ea3m thi\u1ec3u l\u01b0\u1ee3ng nhi\u1ec7t ph\u00e1t sinh trong qu\u00e1 tr\u00ecnh \u0111\u00f3ng r\u1eafn. \u0110i\u1ec1u n\u00e0y kh\u00f4ng ch\u1ec9 \u0111\u1ea3m b\u1ea3o ch\u1ea5t l\u01b0\u1ee3ng b\u00ea t\u00f4ng c\u01b0\u1eddng \u0111\u1ed9 cao m\u00e0 c\u00f2n g\u00f3p ph\u1ea7n ki\u1ec3m so\u00e1t c\u00e1c v\u1ea5n \u0111\u1ec1 li\u00ean quan \u0111\u1ebfn nhi\u1ec7t \u0111\u1ed9 trong kh\u1ed1i b\u00ea t\u00f4ng l\u1edbn.<\/span><\/p>
Criteria<\/th>Ordinary concrete<\/th>B\u00ea t\u00f4ng c\u01b0\u1eddng \u0111\u1ed9 cao (HSC\/HPC)<\/th><\/tr>
Concrete grade<\/td>C16 \u2013 C40<\/td>C50 \u2013 C80 (v\u00e0 cao h\u01a1n)<\/td><\/tr>
Compressive strength (28 days)<\/td>16 \u2013 40 MPa<\/td>50 \u2013 80+ MPa \u2014 cao h\u01a1n 2\u20134 l\u1ea7n<\/td><\/tr>
T\u1ef7 l\u1ec7 w\/c<\/td>0.45 \u2013 0.65<\/td>\u2264 0.38 \u2014 ki\u1ec3m so\u00e1t ch\u1eb7t t\u1eebng m\u1ebb tr\u1ed9n<\/td><\/tr>
Ph\u1ee5 gia si\u00eau d\u1ebbo<\/td>Kh\u00f4ng b\u1eaft bu\u1ed9c<\/td>B\u1eaft bu\u1ed9c \u2014 gi\u1ea3m n\u01b0\u1edbc, duy tr\u00ec \u0111\u1ed9 ch\u1ea3y<\/td><\/tr>
Ki\u1ec3m so\u00e1t c\u1ed1t li\u1ec7u<\/td>Ti\u00eau chu\u1ea9n th\u00f4ng th\u01b0\u1eddng<\/td>C\u00e1t Mn 2.5\u20133.0, \u0111\u00e1 Dmax \u2264 25mm, s\u00e0ng l\u1ecdc k\u1ef9<\/td><\/tr>
Ph\u00e1t tri\u1ec3n c\u01b0\u1eddng \u0111\u1ed9 s\u1edbm<\/td>~40% sau 7 ng\u00e0y<\/td>~70% sau 7 ng\u00e0y \u2192 th\u00e1o c\u1ed1p pha s\u1edbm h\u01a1n<\/td><\/tr>
\u0110\u1ed9 th\u1ea5m n\u01b0\u1edbc<\/td>Trung b\u00ecnh<\/td>Th\u1ea5p \u2014 ch\u1ed1ng \u0103n m\u00f2n c\u1ed1t th\u00e9p t\u1ed1t h\u01a1n<\/td><\/tr>
Ti\u00eau chu\u1ea9n \u00e1p d\u1ee5ng<\/td>TCVN 4453, TCVN 5574<\/td>TCVN 8826, ASTM C494, BS EN 206<\/td><\/tr>
\u1ee8ng d\u1ee5ng \u0111i\u1ec3n h\u00ecnh<\/td>Nh\u00e0 d\u00e2n, c\u00f4ng tr\u00ecnh d\u00e2n d\u1ee5ng th\u00f4ng th\u01b0\u1eddng<\/td>C\u1ea7u, nh\u00e0 cao t\u1ea7ng, d\u1ef1 \u1ee9ng l\u1ef1c, c\u00f4ng nghi\u1ec7p n\u1eb7ng<\/td><\/tr><\/tbody><\/table>

Ti\u00eau chu\u1ea9n v\u00e0 c\u1ea5p ph\u1ed1i b\u00ea t\u00f4ng c\u01b0\u1eddng \u0111\u1ed9 cao<\/span><\/strong><\/h2>

C\u00f3 th\u1ec3 b\u1ea1n ch\u01b0a bi\u1ebft, ph\u1ee5 gia si\u00eau d\u1ebbo l\u00e0 l\u00e0 th\u00e0nh ph\u1ea7n kh\u00f4ng th\u1ec3 thi\u1ebfu trong b\u00ea t\u00f4ng c\u01b0\u1eddng \u0111\u1ed9 cao. Kh\u00f4ng c\u00f3 ph\u1ee5 gia si\u00eau d\u1ebbo, kh\u00f4ng th\u1ec3 \u0111\u1ed3ng th\u1eddi \u0111\u1ea1t w\/c th\u1ea5p (\u2264 0.38) v\u00e0 \u0111\u1ed9 ch\u1ea3y \u0111\u1ee7 \u0111\u1ec3 thi c\u00f4ng \u2014 \u0111\u00e2y l\u00e0 m\u00e2u thu\u1eabn c\u1ed1t l\u00f5i m\u00e0 ph\u1ee5 gia si\u00eau d\u1ebbo gi\u1ea3i quy\u1ebft.<\/span><\/p>
Th\u00e0nh ph\u1ea7n v\u1eadt li\u1ec7u<\/th>Th\u00f4ng tin<\/th><\/tr>
Xi m\u0103ng PCB40<\/td>Portland h\u1ed7n h\u1ee3p \u2014 \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh cao, ph\u00e1t tri\u1ec3n c\u01b0\u1eddng \u0111\u1ed9 t\u1ed1t theo th\u1eddi gian, ki\u1ec3m so\u00e1t nhi\u1ec7t th\u1ee7y h\u00f3a<\/td><\/tr>
C\u00e1t v\u00e0ng<\/td>M\u00f4 \u0111un \u0111\u1ed9 l\u1edbn Mn = 2.5\u20133.0 \u2014 k\u00edch th\u01b0\u1edbc h\u1ea1t t\u1ed1i \u01b0u, t\u0103ng \u0111\u1ed9 li\u00ean k\u1ebft v\u00e0 kh\u1ea3 n\u0103ng ch\u1ecbu l\u1ef1c<\/td><\/tr>
\u0110\u00e1 d\u0103m<\/td>Dmax 20mm v\u00e0 25mm \u2014 s\u00e0ng l\u1ecdc k\u1ef9 l\u01b0\u1ee1ng, c\u1ea5p ph\u1ed1i t\u1ed1i \u01b0u, gi\u1ea3m t\u1ed1i \u0111a r\u1ed7ng t\u1ed5 ong<\/td><\/tr>
N\u01b0\u1edbc tr\u1ed9n<\/td>N\u01b0\u1edbc s\u1ea1ch sinh ho\u1ea1t \u2014 kh\u00f4ng t\u1ea1p ch\u1ea5t g\u00e2y \u1ea3nh h\u01b0\u1edfng qu\u00e1 tr\u00ecnh th\u1ee7y h\u00f3a xi m\u0103ng<\/td><\/tr>
Ph\u1ee5 gia si\u00eau d\u1ebbo<\/td>Superplasticizer g\u1ed1c cao \u2014 gi\u1ea3m l\u01b0\u1ee3ng n\u01b0\u1edbc tr\u1ed9n 20\u201330%, duy tr\u00ec slump cao, t\u0103ng m\u1eadt \u0111\u1ed9 v\u00e0 c\u01b0\u1eddng \u0111\u1ed9. \u0110\u00e2y l\u00e0 th\u00e0nh ph\u1ea7n t\u1ea1o ra s\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa C30 v\u00e0 C60<\/td><\/tr>
T\u1ef7 l\u1ec7 w\/c<\/td>\u2264 0.38 \u2014 ki\u1ec3m tra v\u00e0 hi\u1ec7u ch\u1ec9nh t\u1eebng m\u1ebb tr\u1ed9n theo \u0111i\u1ec1u ki\u1ec7n th\u1ef1c t\u1ebf c\u00f4ng tr\u01b0\u1eddng<\/td><\/tr><\/tbody><\/table>
Ti\u00eau chu\u1ea9n<\/th>Th\u00f4ng tin<\/th><\/tr>
TCVN 8826:2011<\/td>Ph\u1ee5 gia h\u00f3a h\u1ecdc cho b\u00ea t\u00f4ng \u2014 ti\u00eau chu\u1ea9n Vi\u1ec7t Nam<\/td><\/tr>
TCVN 9340:2012<\/td>H\u1ed7n h\u1ee3p b\u00ea t\u00f4ng tr\u1ed9n s\u1eb5n \u2014 y\u00eau c\u1ea7u c\u01a1 b\u1ea3n \u0111\u00e1nh gi\u00e1 ch\u1ea5t l\u01b0\u1ee3ng<\/td><\/tr>
ASTM C494<\/td>Ti\u00eau chu\u1ea9n Hoa K\u1ef3 v\u1ec1 ph\u1ee5 gia h\u00f3a h\u1ecdc cho b\u00ea t\u00f4ng<\/td><\/tr>
BS EN 206<\/td>Ti\u00eau chu\u1ea9n Anh\/Ch\u00e2u \u00c2u \u2014 b\u00ea t\u00f4ng: quy \u0111\u1ecbnh, t\u00ednh n\u0103ng, s\u1ea3n xu\u1ea5t v\u00e0 s\u1ef1 ph\u00f9 h\u1ee3p<\/td><\/tr>
Ki\u1ec3m tra t\u1ea1i tr\u1ea1m<\/td>Th\u1eed m\u1eabu n\u00e9n t\u1eebng m\u1ebb \u2014 ch\u1ee9ng ch\u1ec9 k\u1ebft qu\u1ea3 cung c\u1ea5p theo y\u00eau c\u1ea7u h\u1ee3p \u0111\u1ed3ng<\/td><\/tr><\/tbody><\/table>

\u1ee8ng d\u1ee5ng trong c\u00f4ng tr\u00ecnh<\/span><\/strong><\/h2>

B\u1ea3ng d\u01b0\u1edbi \u0111\u00e2y gi\u00fap nh\u00e0 th\u1ea7u \u0111\u1ed1i chi\u1ebfu nhanh y\u00eau c\u1ea7u thi\u1ebft k\u1ebf v\u1edbi m\u00e1c b\u00ea t\u00f4ng ph\u00f9 h\u1ee3p tr\u01b0\u1edbc khi li\u00ean h\u1ec7 b\u00e1o gi\u00e1:<\/span><\/p>

C\u1ea7u & h\u1ea1 t\u1ea7ng giao th\u00f4ng<\/span><\/strong><\/h3>

\u0110\u00e2y l\u00e0 l\u0129nh v\u1ef1c \u0111\u00f2i h\u1ecfi b\u00ea t\u00f4ng c\u01b0\u1eddng \u0111\u1ed9 cao kh\u1eaft khe nh\u1ea5t \u2014 v\u1eeba c\u1ea7n c\u01b0\u1eddng \u0111\u1ed9 cao, v\u1eeba c\u1ea7n \u0111\u1ed9 b\u1ec1n l\u00e2u d\u00e0i trong m\u00f4i tr\u01b0\u1eddng x\u00e2m th\u1ef1c.<\/span><\/p>