{"id":1024,"date":"2026-04-14T03:09:32","date_gmt":"2026-04-14T03:09:32","guid":{"rendered":"https:\/\/zdmflooring.com\/?p=1024"},"modified":"2026-04-17T08:37:39","modified_gmt":"2026-04-17T08:37:39","slug":"steel-fiber-ultra-high-performance-concrete-uhpc","status":"publish","type":"post","link":"https:\/\/zdmflooring.com\/vi\/steel-fiber-ultra-high-performance-concrete-uhpc\/","title":{"rendered":"C\u00e1ch s\u1ee3i th\u00e9p c\u1ea3i thi\u1ec7n b\u00ea t\u00f4ng si\u00eau cao c\u1ea5p (UHPC)"},"content":{"rendered":"

S\u1ee3i th\u00e9p c\u00f3 t\u00e1c \u0111\u1ed9ng \u0111\u00e1ng k\u1ec3 \u0111\u1ebfn t\u00ednh ch\u1ea5t c\u01a1 h\u1ecdc c\u1ee7a b\u00ea t\u00f4ng si\u00eau cao c\u1ea5p (UHPC). N\u00f3 c\u00f3 th\u1ec3 n\u00e2ng cao hi\u1ec7u qu\u1ea3 c\u00e1c t\u00ednh ch\u1ea5t quan tr\u1ecdng nh\u01b0 \u0111\u1ed9 b\u1ec1n k\u00e9o, kh\u1ea3 n\u0103ng ch\u1ed1ng n\u1ee9t, \u0111\u1ed9 b\u1ec1n va \u0111\u1eadp v\u00e0 \u0111\u1ed9 d\u1ebbo.<\/p>\n\n\n\n

\u0110i\u1ec1u n\u00e0y ch\u1ee7 y\u1ebfu l\u00e0 do s\u1ee3i th\u00e9p c\u00f3 \u0111\u1ed9 b\u1ec1n cao h\u01a1n nhi\u1ec1u so v\u1edbi ma tr\u1eadn b\u00ea t\u00f4ng v\u00e0 t\u1ea1o ra li\u00ean k\u1ebft ch\u1eafc ch\u1eafn v\u1edbi n\u00f3, gi\u00fap ng\u0103n ng\u1eeba s\u1ef1 h\u00ecnh th\u00e0nh v\u00e0 lan r\u1ed9ng c\u1ee7a v\u1ebft n\u1ee9t. Khi h\u00e0m l\u01b0\u1ee3ng s\u1ee3i t\u0103ng l\u00ean, \u0111\u1ed9 b\u1ec1n k\u00e9o c\u1ee7a b\u00ea t\u00f4ng c\u01b0\u1eddng \u0111\u1ed9 c\u1ef1c cao (UHPC) d\u1ea7n \u0111\u01b0\u1ee3c c\u1ea3i thi\u1ec7n, d\u1eabn \u0111\u1ebfn hi\u1ec7u su\u1ea5t k\u1ebft c\u1ea5u t\u1ed5ng th\u1ec3 t\u1ed1t h\u01a1n.<\/p>\n\n\n\n

\u1ea2nh h\u01b0\u1edfng c\u1ee7a s\u1ee3i th\u00e9p \u0111\u1ebfn kh\u1ea3 n\u0103ng ch\u1ea3y c\u1ee7a b\u00ea t\u00f4ng si\u00eau cao c\u1ea5p (UHPC)<\/h2>\n\n\n\n

Vi\u1ec7c b\u1ed5 sung s\u1ee3i th\u00e9p c\u00f3 t\u00e1c \u0111\u1ed9ng ti\u00eau c\u1ef1c \u0111\u1ebfn kh\u1ea3 n\u0103ng ch\u1ea3y c\u1ee7a b\u00ea t\u00f4ng si\u00eau cao c\u1ea5p (UHPC).<\/p>\n\n\n\n

V\u1edbi c\u00f9ng h\u00e0m l\u01b0\u1ee3ng s\u1ee3i, b\u00ea t\u00f4ng c\u01b0\u1eddng \u0111\u1ed9 c\u1ef1c cao (UHPC) \u0111\u01b0\u1ee3c gia c\u01b0\u1eddng b\u1eb1ng s\u1ee3i ng\u1eafn, th\u1eb3ng v\u00e0 kh\u00f4ng c\u00f3 m\u00f3c th\u1ec3 hi\u1ec7n kh\u1ea3 n\u0103ng ch\u1ea3y t\u1ed1t nh\u1ea5t, trong khi c\u1ea3 s\u1ee3i c\u00f3 \u0111\u1ea7u m\u00f3c l\u1eabn s\u1ee3i th\u1eb3ng d\u00e0i h\u01a1n \u0111\u1ec1u d\u1eabn \u0111\u1ebfn s\u1ef1 suy gi\u1ea3m \u1edf c\u00e1c m\u1ee9c \u0111\u1ed9 kh\u00e1c nhau v\u1ec1 kh\u1ea3 n\u0103ng ch\u1ea3y.<\/p>\n\n\n\n

\u0110i\u1ec1u n\u00e0y ch\u1ee7 y\u1ebfu l\u00e0 do s\u1ee3i d\u00e0i h\u01a1n l\u00e0m t\u0103ng s\u1ee9c c\u1ea3n khi tr\u1ed9n, v\u00e0 c\u00e1c s\u1ee3i c\u00f3 \u0111\u1ea7u m\u00f3c d\u1ec5 b\u1ecb qu\u1ea5n v\u00e0o nhau v\u00e0 t\u1ea1o th\u00e0nh c\u00e1c c\u1ee5c trong qu\u00e1 tr\u00ecnh tr\u1ed9n, t\u1eeb \u0111\u00f3 l\u00e0m gi\u1ea3m th\u00eam kh\u1ea3 n\u0103ng thi c\u00f4ng.<\/p>\n\n\n\n

Khi h\u00e0m l\u01b0\u1ee3ng s\u1ee3i th\u00e9p v\u01b0\u1ee3t qu\u00e1 2,01%, \u0111\u1ed9 ch\u1ea3y c\u1ee7a b\u00ea t\u00f4ng c\u01b0\u1eddng \u0111\u1ed9 c\u1ef1c cao (UHPC) gi\u1ea3m \u0111\u00e1ng k\u1ec3, d\u1eabn \u0111\u1ebfn kh\u1ea3 n\u0103ng thi c\u00f4ng k\u00e9m h\u01a1n v\u00e0 qu\u00e1 tr\u00ecnh thi c\u00f4ng tr\u1edf n\u00ean kh\u00f3 kh\u0103n h\u01a1n.<\/p>\n\n\n\n

\"B\u00ea
\u0110\u1ed9 ch\u1ea3y c\u1ee7a b\u00ea t\u00f4ng si\u00eau c\u01b0\u1eddng c\u00f3 s\u1ee3i th\u00e9p<\/figcaption><\/figure>\n\n\n\n

\u1ea2nh h\u01b0\u1edfng c\u1ee7a s\u1ee3i th\u00e9p \u0111\u1ebfn c\u01b0\u1eddng \u0111\u1ed9 n\u00e9n c\u1ee7a b\u00ea t\u00f4ng si\u00eau cao c\u1ea5p (UHPC)<\/h2>\n\n\n\n

Khi h\u00e0m l\u01b0\u1ee3ng s\u1ee3i th\u00e9p t\u0103ng l\u00ean, c\u01b0\u1eddng \u0111\u1ed9 n\u00e9n sau 28 ng\u00e0y c\u1ee7a b\u00ea t\u00f4ng si\u00eau cao c\u1ea5p (UHPC) th\u01b0\u1eddng c\u00f3 xu h\u01b0\u1edbng t\u0103ng. Tuy nhi\u00ean, khi h\u00e0m l\u01b0\u1ee3ng s\u1ee3i ng\u1eafn, th\u1eb3ng v\u00e0 kh\u00f4ng c\u00f3 m\u00f3c v\u01b0\u1ee3t qu\u00e1 1,5%, c\u01b0\u1eddng \u0111\u1ed9 n\u00e9n b\u1eaft \u0111\u1ea7u gi\u1ea3m.<\/p>\n\n\n\n

Khi h\u00e0m l\u01b0\u1ee3ng s\u1ee3i th\u00e9p l\u00e0 0,1%, c\u01b0\u1eddng \u0111\u1ed9 n\u00e9n sau 28 ng\u00e0y c\u1ee7a nh\u00f3m \u0111\u1ed1i ch\u1ee9ng l\u00e0 97,6 MPa. \u1ede h\u00e0m l\u01b0\u1ee3ng s\u1ee3i 2,51%, c\u01b0\u1eddng \u0111\u1ed9 n\u00e9n sau 28 ng\u00e0y c\u1ee7a b\u00ea t\u00f4ng si\u00eau cao c\u01b0\u1eddng (UHPC) \u0111\u01b0\u1ee3c gia c\u01b0\u1eddng b\u1eb1ng s\u1ee3i c\u00f3 \u0111\u1ea7u m\u00f3c, s\u1ee3i th\u1eb3ng d\u00e0i kh\u00f4ng c\u00f3 m\u00f3c v\u00e0 s\u1ee3i th\u1eb3ng ng\u1eafn kh\u00f4ng c\u00f3 m\u00f3c l\u1ea7n l\u01b0\u1ee3t \u0111\u1ea1t 156,5 MPa, 147,4 MPa v\u00e0 130,6 MPa t\u01b0\u01a1ng \u1ee9ng \u2014 t\u01b0\u01a1ng \u1ee9ng v\u1edbi m\u1ee9c t\u0103ng 60,31 MPa, 51,01 MPa v\u00e0 33,81 MPa so v\u1edbi nh\u00f3m \u0111\u1ed1i ch\u1ee9ng.<\/p>\n\n\n\n

X\u00e9t v\u1ec1 xu h\u01b0\u1edbng chung, s\u1ee3i th\u00e9p c\u00f3 \u0111\u1ea7u m\u00f3c mang l\u1ea1i hi\u1ec7u qu\u1ea3 gia c\u01b0\u1eddng \u0111\u00e1ng k\u1ec3 nh\u1ea5t. \u0110i\u1ec1u n\u00e0y ch\u1ee7 y\u1ebfu l\u00e0 do h\u00ecnh d\u1ea1ng m\u00f3c c\u1ee7a ch\u00fang, gi\u00fap t\u1ea1o ra s\u1ef1 neo gi\u1eef c\u01a1 h\u1ecdc t\u1ed1t h\u01a1n v\u00e0 li\u00ean k\u1ebft ch\u1eafc ch\u1eafn h\u01a1n v\u1edbi ma tr\u1eadn xi m\u0103ng, t\u1eeb \u0111\u00f3 c\u1ea3i thi\u1ec7n kh\u1ea3 n\u0103ng truy\u1ec1n t\u1ea3i t\u1ea3i tr\u1ecdng v\u00e0 kh\u1ea3 n\u0103ng giam gi\u1eef. M\u1eb7c d\u00f9 \u0111\u1ed9 ch\u1ea3y c\u1ee7a b\u00ea t\u00f4ng c\u01b0\u1eddng \u0111\u1ed9 c\u1ef1c cao (UHPC) c\u00f3 th\u1ec3 gi\u1ea3m, nh\u01b0ng hi\u1ec7u qu\u1ea3 gia c\u01b0\u1eddng v\u1ec1 \u0111\u1ed9 b\u1ec1n l\u1ea1i r\u00f5 r\u1ec7t h\u01a1n.<\/p>\n\n\n\n

Ng\u01b0\u1ee3c l\u1ea1i, c\u00e1c s\u1ee3i ng\u1eafn th\u1eb3ng kh\u00f4ng c\u00f3 m\u00f3c c\u00f3 th\u1ec3 c\u1ea3i thi\u1ec7n \u0111\u1ed9 b\u00e1m d\u00ednh v\u00e0 \u0111\u1ed9 b\u1ec1n t\u1ea1i c\u00e1c giao di\u1ec7n ngay c\u1ea3 khi s\u1eed d\u1ee5ng v\u1edbi li\u1ec1u l\u01b0\u1ee3ng th\u1ea5p h\u01a1n. Tuy nhi\u00ean, khi h\u00e0m l\u01b0\u1ee3ng v\u01b0\u1ee3t qu\u00e1 1,5%, c\u00e1c s\u1ee3i tr\u1edf n\u00ean kh\u00f3 ph\u00e2n t\u00e1n \u0111\u1ec1u trong qu\u00e1 tr\u00ecnh tr\u1ed9n, d\u1eabn \u0111\u1ebfn hi\u1ec7n t\u01b0\u1ee3ng k\u1ebft t\u1ee5 qu\u00e1 m\u1ee9c. T\u1ea1i nh\u1eefng khu v\u1ef1c n\u00e0y, kh\u00f4ng th\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c s\u1ef1 bao b\u1ecdc ma tr\u1eadn th\u00edch h\u1ee3p, d\u1eabn \u0111\u1ebfn c\u00e1c giao di\u1ec7n y\u1ebfu v\u00e0 cu\u1ed1i c\u00f9ng l\u00e0m gi\u1ea3m c\u01b0\u1eddng \u0111\u1ed9 n\u00e9n c\u1ee7a b\u00ea t\u00f4ng si\u00eau cao c\u01b0\u1eddng (UHPC).<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

\u1ea2nh h\u01b0\u1edfng c\u1ee7a s\u1ee3i th\u00e9p \u0111\u1ebfn \u0111\u1ed9 b\u1ec1n u\u1ed1n c\u1ee7a b\u00ea t\u00f4ng si\u00eau cao c\u1ea5p (UHPC)<\/h2>\n\n\n\n

Khi h\u00e0m l\u01b0\u1ee3ng s\u1ee3i th\u00e9p t\u0103ng l\u00ean, c\u01b0\u1eddng \u0111\u1ed9 u\u1ed1n sau 28 ng\u00e0y c\u1ee7a b\u00ea t\u00f4ng si\u00eau cao c\u1ea5p (UHPC) th\u01b0\u1eddng c\u00f3 xu h\u01b0\u1edbng t\u0103ng. Tuy nhi\u00ean, khi h\u00e0m l\u01b0\u1ee3ng s\u1ee3i ng\u1eafn, th\u1eb3ng v\u00e0 kh\u00f4ng c\u00f3 m\u00f3c v\u01b0\u1ee3t qu\u00e1 1,0%, c\u01b0\u1eddng \u0111\u1ed9 u\u1ed1n b\u1eaft \u0111\u1ea7u gi\u1ea3m.<\/p>\n\n\n\n

Khi h\u00e0m l\u01b0\u1ee3ng s\u1ee3i th\u00e9p l\u00e0 0%, c\u01b0\u1eddng \u0111\u1ed9 u\u1ed1n sau 28 ng\u00e0y c\u1ee7a nh\u00f3m \u0111\u1ed1i ch\u1ee9ng l\u00e0 17,9 MPa. V\u1edbi h\u00e0m l\u01b0\u1ee3ng s\u1ee3i l\u00e0 2,5%, \u0111\u1ed9 b\u1ec1n u\u1ed1n sau 28 ng\u00e0y c\u1ee7a UHPC \u0111\u01b0\u1ee3c gia c\u1ed1 b\u1eb1ng s\u1ee3i c\u00f3 \u0111\u1ea7u m\u00f3c, s\u1ee3i th\u1eb3ng d\u00e0i kh\u00f4ng c\u00f3 m\u00f3c v\u00e0 s\u1ee3i th\u1eb3ng ng\u1eafn kh\u00f4ng c\u00f3 m\u00f3c l\u1ea7n l\u01b0\u1ee3t \u0111\u1ea1t 39,9 MPa, 32,5 MPa v\u00e0 22,7 MPa \u2014 t\u01b0\u01a1ng \u1ee9ng v\u1edbi m\u1ee9c t\u0103ng 122,9%, 81,61% v\u00e0 26,81% so v\u1edbi nh\u00f3m \u0111\u1ed1i ch\u1ee9ng.<\/p>\n\n\n\n

S\u1ef1 c\u1ea3i thi\u1ec7n v\u1ec1 \u0111\u1ed9 b\u1ec1n u\u1ed1n c\u1ee7a s\u1ee3i c\u00f3 \u0111\u1ea7u m\u00f3c v\u00e0 s\u1ee3i th\u1eb3ng d\u00e0i cao h\u01a1n \u0111\u00e1ng k\u1ec3 so v\u1edbi \u0111\u1ed9 b\u1ec1n n\u00e9n. \u0110i\u1ec1u n\u00e0y ch\u1ee7 y\u1ebfu l\u00e0 do \u0111\u1ed9 d\u1ebbo dai cao c\u1ee7a s\u1ee3i th\u00e9p, c\u0169ng nh\u01b0 t\u00e1c d\u1ee5ng li\u00ean k\u1ebft hi\u1ec7u qu\u1ea3 nh\u1edd chi\u1ec1u d\u00e0i c\u1ee7a ch\u00fang v\u00e0, trong tr\u01b0\u1eddng h\u1ee3p s\u1ee3i c\u00f3 \u0111\u1ea7u m\u00f3c, s\u1ef1 neo gi\u1eef c\u01a1 h\u1ecdc \u1edf c\u1ea3 hai \u0111\u1ea7u. Nh\u1eefng y\u1ebfu t\u1ed1 n\u00e0y gi\u00fap t\u0103ng c\u01b0\u1eddng s\u1ef1 li\u00ean k\u1ebft v\u1edbi ma tr\u1eadn, c\u1ea3i thi\u1ec7n kh\u1ea3 n\u0103ng ch\u1ed1ng n\u1ee9t v\u00e0 mang l\u1ea1i hi\u1ec7u su\u1ea5t u\u1ed1n v\u01b0\u1ee3t tr\u1ed9i.<\/p>\n\n\n\n

Ng\u01b0\u1ee3c l\u1ea1i, c\u00e1c s\u1ee3i ng\u1eafn th\u1eb3ng kh\u00f4ng c\u00f3 m\u00f3c c\u00f3 chi\u1ec1u d\u00e0i ng\u1eafn h\u01a1n, b\u1ec1 m\u1eb7t nh\u1eb5n v\u00e0 kh\u00f4ng c\u00f3 \u0111i\u1ec3m b\u00e1m \u1edf hai \u0111\u1ea7u. Khi ch\u1ecbu t\u1ea3i u\u1ed1n, c\u00e1c \u0111i\u1ec3m y\u1ebfu c\u00f3 xu h\u01b0\u1edbng h\u00ecnh th\u00e0nh nhi\u1ec1u h\u01a1n t\u1ea1i giao di\u1ec7n gi\u1eefa c\u00e1c s\u1ee3i v\u00e0 v\u1eefa. C\u00e1c s\u1ee3i c\u00f3 th\u1ec3 b\u1ecb k\u00e9o ra d\u1ec5 d\u00e0ng h\u01a1n, d\u1eabn \u0111\u1ebfn n\u1ee9t s\u1edbm v\u00e0 \u0111\u1ed9 b\u1ec1n u\u1ed1n th\u1ea5p h\u01a1n.<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

\u1ea2nh h\u01b0\u1edfng c\u1ee7a s\u1ee3i th\u00e9p \u0111\u1ebfn \u0111\u1ed9 b\u1ec1n k\u00e9o t\u00e1ch c\u1ee7a b\u00ea t\u00f4ng si\u00eau cao c\u1ea5p (UHPC)<\/h2>\n\n\n\n

Khi h\u00e0m l\u01b0\u1ee3ng s\u1ee3i th\u00e9p t\u0103ng l\u00ean, \u0111\u1ed9 b\u1ec1n k\u00e9o khi c\u1eaft sau 28 ng\u00e0y c\u1ee7a b\u00ea t\u00f4ng si\u00eau cao c\u1ea5p (UHPC) \u0111\u01b0\u1ee3c c\u1ea3i thi\u1ec7n \u0111\u00e1ng k\u1ec3.<\/p>\n\n\n\n

Khi h\u00e0m l\u01b0\u1ee3ng s\u1ee3i l\u00e0 0%, \u0111\u1ed9 b\u1ec1n k\u00e9o t\u00e1ch sau 28 ng\u00e0y c\u1ee7a nh\u00f3m \u0111\u1ed1i ch\u1ee9ng l\u00e0 6,5 MPa. V\u1edbi h\u00e0m l\u01b0\u1ee3ng s\u1ee3i l\u00e0 2,5%, c\u00e1c gi\u00e1 tr\u1ecb \u0111\u1ed1i v\u1edbi UHPC \u0111\u01b0\u1ee3c gia c\u1ed1 b\u1eb1ng s\u1ee3i c\u00f3 \u0111\u1ea7u m\u00f3c, s\u1ee3i th\u1eb3ng d\u00e0i kh\u00f4ng c\u00f3 m\u00f3c v\u00e0 s\u1ee3i th\u1eb3ng ng\u1eafn kh\u00f4ng c\u00f3 m\u00f3c l\u1ea7n l\u01b0\u1ee3t \u0111\u1ea1t 16,5 MPa, 15,3 MPa v\u00e0 12,7 MPa \u2014 t\u01b0\u01a1ng \u1ee9ng v\u1edbi m\u1ee9c t\u0103ng 153,8%, 135,4% v\u00e0 95,4% so v\u1edbi nh\u00f3m \u0111\u1ed1i ch\u1ee9ng.<\/p>\n\n\n\n

Trong s\u1ed1 c\u00e1c lo\u1ea1i s\u1ee3i kh\u00e1c nhau, s\u1ee3i th\u00e9p c\u00f3 \u0111\u1ea7u m\u00f3c cho th\u1ea5y s\u1ef1 c\u1ea3i thi\u1ec7n \u0111\u00e1ng k\u1ec3 nh\u1ea5t v\u1ec1 \u0111\u1ed9 b\u1ec1n k\u00e9o khi t\u00e1ch. Ng\u01b0\u1ee3c l\u1ea1i, khi h\u00e0m l\u01b0\u1ee3ng s\u1ee3i th\u1eb3ng ng\u1eafn kh\u00f4ng c\u00f3 m\u00f3c v\u01b0\u1ee3t qu\u00e1 1,5%, hi\u1ec7u qu\u1ea3 gia c\u01b0\u1eddng tr\u1edf n\u00ean k\u00e9m r\u00f5 r\u1ec7t h\u01a1n.<\/p>\n\n\n\n

\u0110i\u1ec1u n\u00e0y cho th\u1ea5y chi\u1ec1u d\u00e0i s\u1ee3i v\u00e0 s\u1ef1 hi\u1ec7n di\u1ec7n c\u1ee7a c\u00e1c \u0111\u1ea7u s\u1ee3i c\u00f3 m\u00f3c \u0111\u00f3ng vai tr\u00f2 quan tr\u1ecdng trong vi\u1ec7c gia c\u1ed1 c\u1ea5u tr\u00fac b\u00ean trong c\u1ee7a b\u00ea t\u00f4ng c\u01b0\u1eddng \u0111\u1ed9 c\u1ef1c cao (UHPC) v\u00e0 t\u0103ng c\u01b0\u1eddng \u0111\u1ed9 b\u00e1m d\u00ednh t\u1ea1i giao di\u1ec7n s\u1ee3i\u2013ma tr\u1eadn.<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

\u1ea2nh h\u01b0\u1edfng c\u1ee7a s\u1ee3i th\u00e9p \u0111\u1ebfn t\u1ef7 l\u1ec7 k\u00e9o\/n\u00e9n v\u00e0 t\u1ef7 l\u1ec7 u\u1ed1n\/n\u00e9n c\u1ee7a b\u00ea t\u00f4ng si\u00eau cao c\u1ea5p (UHPC)<\/h2>\n\n\n\n

T\u1ef7 l\u1ec7 c\u01b0\u1eddng \u0111\u1ed9 u\u1ed1n tr\u00ean c\u01b0\u1eddng \u0111\u1ed9 n\u00e9n c\u1ee7a b\u00ea t\u00f4ng l\u00e0 t\u1ef7 l\u1ec7 gi\u1eefa c\u01b0\u1eddng \u0111\u1ed9 u\u1ed1n v\u00e0 c\u01b0\u1eddng \u0111\u1ed9 n\u00e9n c\u1ee7a v\u1eadt li\u1ec7u n\u00e0y. Ch\u1ec9 s\u1ed1 n\u00e0y th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 \u0111\u00e1nh gi\u00e1 \u0111\u1ed9 b\u1ec1n va \u0111\u1eadp c\u1ee7a b\u00ea t\u00f4ng, \u0111\u1eb7c bi\u1ec7t trong c\u00e1c \u1ee9ng d\u1ee5ng nh\u01b0 m\u1eb7t \u0111\u01b0\u1eddng ch\u1ecbu t\u1ea3i n\u1eb7ng v\u00e0 k\u1ef9 thu\u1eadt c\u1ea7u \u0111\u01b0\u1eddng. T\u1ef7 l\u1ec7 c\u00e0ng cao th\u00ec \u0111\u1ed9 b\u1ec1n va \u0111\u1eadp c\u00e0ng t\u1ed1t.<\/p>\n\n\n\n

T\u1ef7 l\u1ec7 c\u01b0\u1eddng \u0111\u1ed9 k\u00e9o tr\u00ean c\u01b0\u1eddng \u0111\u1ed9 n\u00e9n l\u00e0 t\u1ef7 l\u1ec7 gi\u1eefa c\u01b0\u1eddng \u0111\u1ed9 k\u00e9o khi t\u00e1ch v\u00e0 c\u01b0\u1eddng \u0111\u1ed9 n\u00e9n. Ch\u1ec9 s\u1ed1 n\u00e0y \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 \u0111\u00e1nh gi\u00e1 \u0111\u1ed9 an to\u00e0n v\u00e0 \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh c\u1ee7a b\u00ea t\u00f4ng. T\u1ef7 l\u1ec7 c\u00e0ng cao cho th\u1ea5y hi\u1ec7u su\u1ea5t c\u00e0ng \u1ed5n \u0111\u1ecbnh v\u00e0 nguy c\u01a1 g\u00e3y gi\u00f2n c\u00e0ng th\u1ea5p.

Khi h\u00e0m l\u01b0\u1ee3ng s\u1ee3i th\u00e9p t\u0103ng l\u00ean, t\u1ef7 l\u1ec7 gi\u1eefa c\u01b0\u1eddng \u0111\u1ed9 k\u00e9o v\u00e0 c\u01b0\u1eddng \u0111\u1ed9 n\u00e9n c\u1ee7a b\u00ea t\u00f4ng si\u00eau cao c\u1ea5p (UHPC) c\u00f3 xu h\u01b0\u1edbng t\u0103ng l\u00ean n\u00f3i chung.<\/p>\n\n\n\n

Khi h\u00e0m l\u01b0\u1ee3ng s\u1ee3i l\u00e0 0%, t\u1ef7 l\u1ec7 n\u00e0y \u0111\u1ed1i v\u1edbi nh\u00f3m \u0111\u1ed1i ch\u1ee9ng l\u00e0 0,08. \u1ede h\u00e0m l\u01b0\u1ee3ng s\u1ee3i 2,5%, t\u1ef7 l\u1ec7 k\u00e9o\/n\u00e9n c\u1ee7a UHPC \u0111\u01b0\u1ee3c gia c\u1ed1 b\u1eb1ng s\u1ee3i c\u00f3 \u0111\u1ea7u m\u00f3c, s\u1ee3i th\u1eb3ng d\u00e0i kh\u00f4ng c\u00f3 m\u00f3c v\u00e0 s\u1ee3i th\u1eb3ng ng\u1eafn kh\u00f4ng c\u00f3 m\u00f3c l\u1ea7n l\u01b0\u1ee3t \u0111\u1ea1t 0,115, 0,110 v\u00e0 0,106 \u2014 t\u01b0\u01a1ng \u1ee9ng v\u1edbi m\u1ee9c t\u0103ng 43,8%, 37,5% v\u00e0 32,5% so v\u1edbi nh\u00f3m \u0111\u1ed1i ch\u1ee9ng.<\/p>\n\n\n\n

Khi h\u00e0m l\u01b0\u1ee3ng s\u1ee3i th\u00e9p d\u01b0\u1edbi 1,0%, m\u1ee9c \u0111\u1ed9 c\u1ea3i thi\u1ec7n c\u1ee7a t\u1ef7 l\u1ec7 n\u00e0y t\u01b0\u01a1ng \u0111\u1ed1i h\u1ea1n ch\u1ebf, cho th\u1ea5y r\u1eb1ng vi\u1ec7c s\u1eed d\u1ee5ng li\u1ec1u l\u01b0\u1ee3ng s\u1ee3i th\u1ea5p c\u00f3 t\u00e1c \u0111\u1ed9ng kh\u00f4ng \u0111\u00e1ng k\u1ec3. Tuy nhi\u00ean, khi h\u00e0m l\u01b0\u1ee3ng v\u01b0\u1ee3t qu\u00e1 1,0%, m\u1ee9c \u0111\u1ed9 c\u1ea3i thi\u1ec7n tr\u1edf n\u00ean \u0111\u00e1ng k\u1ec3. \u0110i\u1ec1u n\u00e0y l\u00e0 do c\u00e1c s\u1ee3i k\u1ebft d\u00ednh t\u1ed1t h\u01a1n v\u1edbi ma tr\u1eadn v\u1eefa, d\u1eabn \u0111\u1ebfn s\u1ef1 \u1ed5n \u0111\u1ecbnh \u0111\u01b0\u1ee3c n\u00e2ng cao v\u00e0 gi\u1ea3m nguy c\u01a1 g\u00e3y gi\u00f2n.<\/p>\n\n\n\n

T\u1ef7 l\u1ec7 gi\u1eefa \u0111\u1ed9 b\u1ec1n u\u1ed1n v\u00e0 \u0111\u1ed9 b\u1ec1n n\u00e9n c\u1ee7a b\u00ea t\u00f4ng c\u01b0\u1eddng \u0111\u1ed9 c\u1ef1c cao (UHPC) \u0111\u01b0\u1ee3c gia c\u01b0\u1eddng b\u1eb1ng s\u1ee3i c\u00f3 \u0111\u1ea7u m\u00f3c v\u00e0 s\u1ee3i th\u1eb3ng d\u00e0i th\u01b0\u1eddng t\u0103ng theo h\u00e0m l\u01b0\u1ee3ng s\u1ee3i, trong khi t\u1ef7 l\u1ec7 n\u00e0y \u0111\u1ed1i v\u1edbi s\u1ee3i th\u1eb3ng ng\u1eafn ban \u0111\u1ea7u t\u0103ng l\u00ean r\u1ed3i sau \u0111\u00f3 gi\u1ea3m xu\u1ed1ng.<\/p>\n\n\n\n

Khi h\u00e0m l\u01b0\u1ee3ng s\u1ee3i l\u00e0 0%, nh\u00f3m \u0111\u1ed1i ch\u1ee9ng c\u00f3 t\u1ef7 l\u1ec7 l\u00e0 0,18. \u1ede h\u00e0m l\u01b0\u1ee3ng s\u1ee3i 2,5%, t\u1ef7 l\u1ec7 c\u1ee7a s\u1ee3i c\u00f3 \u0111\u1ea7u m\u00f3c, s\u1ee3i th\u1eb3ng d\u00e0i v\u00e0 s\u1ee3i th\u1eb3ng ng\u1eafn l\u1ea7n l\u01b0\u1ee3t \u0111\u1ea1t 0,25, 0,23 v\u00e0 0,18 \u2014 t\u01b0\u01a1ng \u1ee9ng v\u1edbi m\u1ee9c t\u0103ng 38,9%, 27,8% v\u00e0 0%.<\/p>\n\n\n\n

\u0110i\u1ec1u n\u00e0y cho th\u1ea5y vi\u1ec7c t\u0103ng h\u00e0m l\u01b0\u1ee3ng s\u1ee3i th\u1eb3ng ng\u1eafn kh\u00f4ng c\u00f3 m\u00f3c kh\u00f4ng l\u00e0m c\u1ea3i thi\u1ec7n \u0111\u1ed9 b\u1ec1n va \u0111\u1eadp v\u00e0 th\u1eadm ch\u00ed c\u00f3 th\u1ec3 l\u00e0m gi\u1ea3m \u0111\u1ed9 b\u1ec1n n\u00e0y. Nguy\u00ean nh\u00e2n ch\u1ee7 y\u1ebfu l\u00e0 do c\u00e1c s\u1ee3i n\u00e0y ng\u1eafn h\u01a1n v\u00e0 thi\u1ebfu \u0111i\u1ec3m b\u00e1m d\u00ednh \u1edf hai \u0111\u1ea7u. Khi ch\u1ecbu \u1ee9ng su\u1ea5t cao trong qu\u00e1 tr\u00ecnh ch\u1ecbu t\u1ea3i u\u1ed1n, hi\u1ec7n t\u01b0\u1ee3ng bong tr\u00f3c gi\u1eefa c\u00e1c s\u1ee3i v\u00e0 v\u1eefa d\u1ec5 x\u1ea3y ra h\u01a1n, d\u1eabn \u0111\u1ebfn kh\u1ea3 n\u0103ng giam gi\u1eef y\u1ebfu h\u01a1n v\u00e0 \u0111\u1ed9 b\u1ec1n va \u0111\u1eadp gi\u1ea3m.<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n
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K\u1ebft lu\u1eadn<\/h2>\n\n\n\n