{"id":10379,"date":"2026-03-14T11:18:18","date_gmt":"2026-03-14T04:18:18","guid":{"rendered":"https:\/\/dufago.com.vn\/?p=10379"},"modified":"2026-03-15T09:18:32","modified_gmt":"2026-03-15T02:18:32","slug":"be-tong-bi-nut-nguyen-nhan-cach-xu-ly","status":"publish","type":"post","link":"https:\/\/dufago.com.vn\/en\/be-tong-bi-nut-nguyen-nhan-cach-xu-ly\/","title":{"rendered":"B\u00ea t\u00f4ng b\u1ecb n\u1ee9t: Nguy\u00ean nh\u00e2n, ph\u00e2n lo\u1ea1i v\u00e0 c\u00e1ch x\u1eed l\u00fd \u0111\u00fang k\u1ef9 thu\u1eadt"},"content":{"rendered":"

Khi ph\u00e1t hi\u1ec7n b\u00ea t\u00f4ng b\u1ecb n\u1ee9t tr\u00ean s\u00e0n ho\u1eb7c t\u01b0\u1eddng, nhi\u1ec1u ng\u01b0\u1eddi th\u01b0\u1eddng lo l\u1eafng li\u1ec7u \u0111\u00f3 ch\u1ec9 l\u00e0 v\u1ebft n\u1ee9t b\u1ec1 m\u1eb7t hay d\u1ea5u hi\u1ec7u c\u1ee7a v\u1ea5n \u0111\u1ec1 nghi\u00eam tr\u1ecdng. Th\u1ef1c t\u1ebf, v\u1ebft n\u1ee9t b\u00ea t\u00f4ng c\u00f3 th\u1ec3 xu\u1ea5t ph\u00e1t t\u1eeb nhi\u1ec1u nguy\u00ean nh\u00e2n nh\u01b0 co ng\u00f3t, nhi\u1ec7t th\u1ee7y h\u00f3a ho\u1eb7c t\u1ea3i tr\u1ecdng k\u1ebft c\u1ea5u. Nh\u1eadn bi\u1ebft \u0111\u00fang lo\u1ea1i n\u1ee9t l\u00e0 b\u01b0\u1edbc quan tr\u1ecdng \u0111\u1ec3 \u0111\u00e1nh gi\u00e1 m\u1ee9c \u0111\u1ed9 v\u00e0 l\u1ef1a ch\u1ecdn c\u00e1ch x\u1eed l\u00fd ph\u00f9 h\u1ee3p.<\/span><\/strong><\/em><\/p>\n

Ph\u00e1t hi\u1ec7n b\u00ea t\u00f4ng b\u1ecb n\u1ee9t: Ki\u1ec3m tra g\u00ec tr\u01b0\u1edbc khi x\u1eed l\u00fd?<\/span><\/strong><\/h2>\n

Khi v\u1eeba th\u1ea5y v\u1ebft n\u1ee9t xu\u1ea5t hi\u1ec7n, b\u1ea1n kh\u00f4ng n\u00ean x\u1eed l\u00fd ngay theo c\u1ea3m t\u00ednh. Tr\u01b0\u1edbc h\u1ebft, h\u00e3y ki\u1ec3m tra nhanh 3 y\u1ebfu t\u1ed1 quan tr\u1ecdng d\u01b0\u1edbi \u0111\u00e2y \u0111\u1ec3 \u0111\u1ecbnh h\u01b0\u1edbng nguy\u00ean nh\u00e2n v\u00e0 m\u1ee9c \u0111\u1ed9 \u1ea3nh h\u01b0\u1edfng.<\/span><\/p>\n

1. Ki\u1ec3m tra th\u1eddi \u0111i\u1ec3m xu\u1ea5t hi\u1ec7n v\u1ebft n\u1ee9t<\/span><\/strong><\/h3>\n

N\u1ebfu b\u00ea t\u00f4ng n\u1ee9t sau v\u00e0i gi\u1edd \u0111\u1ed5, nguy\u00ean nh\u00e2n th\u01b0\u1eddng li\u00ean quan \u0111\u1ebfn co ng\u00f3t d\u1ebbo, l\u00fan d\u1ebbo ho\u1eb7c m\u1ea5t n\u01b0\u1edbc b\u1ec1 m\u1eb7t. Trong nhi\u1ec1u tr\u01b0\u1eddng h\u1ee3p, \u0111\u00e2y l\u00e0 d\u1ea1ng n\u1ee9t b\u00ea t\u00f4ng trong 24h \u0111\u1ea7u sau khi \u0111\u1ed5<\/strong><\/a>, c\u1ea7n \u0111\u01b0\u1ee3c nh\u1eadn bi\u1ebft v\u00e0 x\u1eed l\u00fd s\u1edbm.<\/span><\/p>\n

N\u1ebfu v\u1ebft n\u1ee9t xu\u1ea5t hi\u1ec7n sau v\u00e0i ng\u00e0y, nguy\u00ean nh\u00e2n c\u00f3 th\u1ec3 li\u00ean quan \u0111\u1ebfn nhi\u1ec7t thu\u1ef7 ho\u00e1. Tr\u01b0\u1eddng h\u1ee3p n\u1ee9t xu\u1ea5t hi\u1ec7n sau v\u00e0i tu\u1ea7n, v\u00e0i th\u00e1ng ho\u1eb7c trong qu\u00e1 tr\u00ecnh s\u1eed d\u1ee5ng, c\u1ea7n ngh\u0129 t\u1edbi co ng\u00f3t kh\u00f4, \u0103n m\u00f2n c\u1ed1t th\u00e9p ho\u1eb7c v\u1ea5n \u0111\u1ec1 k\u1ebft c\u1ea5u.<\/span><\/p>\n

2. Quan s\u00e1t h\u00ecnh d\u1ea1ng v\u1ebft n\u1ee9t v\u00e0 h\u01b0\u1edbng n\u1ee9t<\/span><\/strong><\/h3>\n

D\u1ea1ng v\u1ebft n\u1ee9t l\u01b0\u1edbi m\u1ea3nh l\u00e0 n\u1ee9t ch\u00e2n chim ho\u1eb7c co ng\u00f3t b\u00ea t\u00f4ng b\u1ec1 m\u1eb7t. V\u1ebft n\u1ee9t ch\u1ea1y d\u1ecdc theo c\u1ed1t th\u00e9p th\u00ec li\u00ean quan nhi\u1ec1u \u0111\u1ebfn l\u00fan d\u1ebbo ho\u1eb7c \u0103n m\u00f2n th\u00e9p. Nh\u1eefng v\u1ebft n\u1ee9t l\u1edbn, r\u00f5 h\u01a1n k\u00e9o d\u00e0i d\u1ea7m, s\u00e0n, c\u1ed9t ho\u1eb7c nh\u1eefng v\u1ecb tr\u00ed ch\u1ecbu l\u1ef1c th\u00ec \u0111\u01b0\u1ee3c \u0111\u00e1nh gi\u00e1 l\u00e0 n\u1ee9t k\u1ebft c\u1ea5u.<\/span><\/p>\n

3. \u0110\u00e1nh gi\u00e1 \u0111\u1ed9 r\u1ed9ng v\u00e0 m\u1ee9c \u0111\u1ed9 ph\u00e1t tri\u1ec3n<\/span><\/strong><\/h3>\n

Nh\u1eefng v\u1ebft n\u1ee9t nh\u1ecf m\u00e0 ch\u1ec9 th\u1ea5y r\u00f5 khi quan s\u00e1t g\u1ea7n th\u00ec c\u00f3 th\u1ec3 l\u00e0 n\u1ee9t b\u1ec1 m\u1eb7t. Nh\u01b0ng n\u1ebfu n\u1ee9t l\u1edbn r\u1ed9ng d\u1ea7n theo th\u1eddi gian, k\u00e8m theo hi\u1ec7n t\u01b0\u1ee3ng th\u1ea5m n\u01b0\u1edbc, r\u1ec9 th\u00e9p, v\u00f5ng s\u00e0n ho\u1eb7c l\u00fan n\u1ec1n ch\u1eafc ch\u1eafn \u0111i k\u00e8m m\u1ee9c \u0111\u1ed9 r\u1ee7i ro cao.<\/span><\/p>\n

B\u00ea t\u00f4ng b\u1ecb n\u1ee9t c\u00f3 nguy hi\u1ec3m kh\u00f4ng? Khi n\u00e0o c\u1ea7n lo l\u1eafng<\/span><\/strong><\/h2>\n

R\u1ea5t nhi\u1ec1u gia ch\u1ee7 th\u1ea5y v\u1ebft n\u1ee9t xu\u1ea5t hi\u1ec7n l\u00e0 lo l\u1eafng ngay. Nh\u01b0ng kh\u00f4ng ph\u1ea3i m\u1ecdi v\u1ebft n\u1ee9t b\u00ea t\u00f4ng \u0111\u1ec1u nguy hi\u1ec3m. B\u1ea1n c\u00f3 th\u1ec3 nh\u1eadn bi\u1ebft nhanh m\u1ee9c \u0111\u1ed9 t\u1eebng v\u1ebft n\u1ee9t b\u00ea t\u00f4ng b\u1eb1ng b\u1ea3ng d\u01b0\u1edbi \u0111\u00e2y.<\/span><\/p>\n\n\n\n\n\n\n\n\n
V\u1ebft n\u1ee9t c\u1ea7n x\u1eed l\u00fd ngay<\/th>\nV\u1ebft n\u1ee9t th\u01b0\u1eddng kh\u00f4ng nguy hi\u1ec3m<\/th>\n<\/tr>\n
N\u1ee9t d\u1ecdc c\u1ed9t, d\u1ea7m ch\u1ecbu l\u1ef1c<\/td>\nN\u1ee9t ch\u00e2n chim ch\u1ec9 \u1edf l\u1edbp m\u1eb7t < 0.1 mm<\/td>\n<\/tr>\n
N\u1ee9t xuy\u00ean su\u1ed1t t\u01b0\u1eddng ho\u1eb7c s\u00e0n<\/td>\nN\u1ee9t co ng\u00f3t \u0111\u1ec1u, kh\u00f4ng xuy\u00ean s\u00e2u<\/td>\n<\/tr>\n
V\u1ebft n\u1ee9t k\u00e8m r\u1ec9 s\u00e9t, b\u00ea t\u00f4ng bong tr\u00f3c<\/td>\nXu\u1ea5t hi\u1ec7n ngay sau thi c\u00f4ng r\u1ed3i \u1ed5n \u0111\u1ecbnh<\/td>\n<\/tr>\n
N\u1ee9t ng\u00e0y c\u00e0ng r\u1ed9ng\/d\u00e0i th\u00eam<\/td>\nKh\u00f4ng k\u00e8m bi\u1ebfn d\u1ea1ng k\u1ebft c\u1ea5u<\/td>\n<\/tr>\n
S\u00e0n b\u00ea t\u00f4ng n\u1ee9t th\u1ea5m n\u01b0\u1edbc<\/td>\nKh\u00f4ng th\u1ea5m n\u01b0\u1edbc, kh\u00f4ng ti\u1ebfn tri\u1ec3n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

9 lo\u1ea1i n\u1ee9t b\u00ea t\u00f4ng ph\u1ed5 bi\u1ebfn nh\u1ea5t v\u00e0 c\u00e1ch nh\u1eadn bi\u1ebft<\/span><\/strong><\/h2>\n

D\u01b0\u1edbi \u0111\u00e2y l\u00e0 9 lo\u1ea1i n\u1ee9t b\u00ea t\u00f4ng th\u01b0\u1eddng g\u1eb7p trong thi c\u00f4ng v\u00e0 s\u1eed d\u1ee5ng c\u00f4ng tr\u00ecnh. M\u1ed7i lo\u1ea1i n\u1ee9t \u0111\u1ec1u c\u00f3 c\u01a1 ch\u1ebf h\u00ecnh th\u00e0nh ri\u00eang bi\u1ec7t, m\u1ee9c \u0111\u1ed9 \u1ea3nh h\u01b0\u1edfng kh\u00e1c nhau.<\/span><\/p>\n

N\u1ee9t co ng\u00f3t d\u1ebbo<\/span><\/strong><\/h3>\n

\u0110\u00e2y l\u00e0 lo\u1ea1i n\u1ee9t xu\u1ea5t hi\u1ec7n s\u1edbm nh\u1ea5t, ch\u1ec9 30 ph\u00fat \u0111\u1ebfn 6 gi\u1edd sau khi \u0111\u1ed5 b\u00ea t\u00f4ng, khi b\u00ea t\u00f4ng ch\u01b0a \u0111\u00f4ng k\u1ebft ho\u00e0n to\u00e0n.<\/span><\/p>\n

\"v\u1ebft
N\u1ee9t co ng\u00f3t d\u1ebbo th\u01b0\u1eddng xu\u1ea5t hi\u1ec7n trong v\u00e0i gi\u1edd \u0111\u1ea7u khi b\u00ea t\u00f4ng m\u1ea5t n\u01b0\u1edbc nhanh.<\/em><\/figcaption><\/figure>\n\n\n\n\n\n\n\n\n\n
H\u1ea1ng m\u1ee5c<\/th>\nContent<\/th>\n<\/tr>\n
C\u01a1 ch\u1ebf<\/td>\nN\u01b0\u1edbc b\u1ed1c h\u01a1i tr\u00ean b\u1ec1 m\u1eb7t nhanh h\u01a1n t\u1ed1c \u0111\u1ed9 mao d\u1eabn b\u00ean trong cung c\u1ea5p. Khi\u1ebfn b\u1ec1 m\u1eb7t co l\u1ea1i d\u1eabn \u0111\u1ebfn b\u00ea t\u00f4ng c\u00f2n y\u1ebfu n\u00ean b\u1ecb n\u1ee9t.<\/td>\n<\/tr>\n
\u0110\u1eb7c \u0111i\u1ec3m nh\u1eadn bi\u1ebft<\/td>\nV\u1ebft n\u1ee9t nh\u1ecf, d\u00e0i 10\u2013100 cm, r\u1ed9ng 0.3\u20132 mm. Th\u01b0\u1eddng xu\u1ea5t hi\u1ec7n song song, ph\u00e2n b\u1ed1 ng\u1eabu nhi\u00ean tr\u00ean m\u1eb7t s\u00e0n.<\/td>\n<\/tr>\n
Th\u1eddi \u0111i\u1ec3m xu\u1ea5t hi\u1ec7n<\/td>\n30 ph\u00fat \u2013 6 gi\u1edd sau khi \u0111\u1ed5, khi b\u00ea t\u00f4ng ch\u01b0a \u0111\u00f4ng k\u1ebft ho\u00e0n to\u00e0n.<\/td>\n<\/tr>\n
Nguy\u00ean nh\u00e2n ch\u00ednh<\/td>\nN\u1eafng g\u1eaft, gi\u00f3 m\u1ea1nh, \u0111\u1ed5 s\u00e0n di\u1ec7n t\u00edch l\u1edbn, kh\u00f4ng b\u1ea3o d\u01b0\u1ee1ng k\u1ecbp th\u1eddi.<\/td>\n<\/tr>\n
Ph\u00f2ng ng\u1eeba<\/td>\nChe ch\u1eafn gi\u00f3, phun s\u01b0\u01a1ng gi\u1eef \u1ea9m s\u1edbm. Ch\u1ecdn \u0111\u1ed5 b\u00ea t\u00f4ng v\u00e0o s\u00e1ng s\u1edbm ho\u1eb7c chi\u1ec1u m\u00e1t, c\u00f3 th\u1ec3 d\u00f9ng s\u1ee3i PP ph\u00e2n t\u00e1n.<\/td>\n<\/tr>\n
X\u1eed l\u00fd<\/td>\nH\u01b0\u1edbng d\u1eabn x\u1eed l\u00fd \u0111\u1ed1i v\u1edbi tr\u01b0\u1eddng h\u1ee3p n\u1ee9t trong v\u00f2ng 24h \u0111\u1ea7u ti\u00ean sau khi \u0111\u1ed5<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

N\u1ee9t l\u00fan d\u1ebbo<\/span><\/strong><\/h3>\n

Lo\u1ea1i n\u1ee9t n\u00e0y th\u01b0\u1eddng b\u1ecb nh\u1ea7m v\u1edbi n\u1ee9t co ng\u00f3t d\u1ebbo v\u00ec c\u00f9ng xu\u1ea5t hi\u1ec7n s\u1edbm, nh\u01b0ng nguy\u00ean nh\u00e2n b\u00ea t\u00f4ng b\u1ecb n\u1ee9t v\u00e0 h\u00ecnh d\u1ea1ng ho\u00e0n to\u00e0n kh\u00e1c.<\/span><\/p>\n

\"n\u1ee9t
N\u1ee9t l\u00fan d\u1ebbo h\u00ecnh th\u00e0nh khi b\u00ea t\u00f4ng l\u00fan quanh c\u1ed1t th\u00e9p trong giai \u0111o\u1ea1n \u0111\u1ea7u.<\/em><\/figcaption><\/figure>\n\n\n\n\n\n\n\n\n\n
H\u1ea1ng m\u1ee5c<\/th>\nContent<\/th>\n<\/tr>\n
C\u01a1 ch\u1ebf<\/td>\nSau khi \u0111\u1ed5, b\u00ea t\u00f4ng l\u00fan xu\u1ed1ng do tr\u1ecdng l\u01b0\u1ee3ng. N\u1ebfu d\u01b0\u1edbi c\u00f3 c\u1ed1t th\u00e9p d\u00e0y ho\u1eb7c thay \u0111\u1ed5i ti\u1ebft di\u1ec7n \u0111\u1ed9t ng\u1ed9t, b\u00ea t\u00f4ng ph\u00eda tr\u00ean b\u1ecb gi\u1eef l\u1ea1i, khi\u1ebfn ch\u00fang t\u1ea1o khe n\u1ee9t d\u1ecdc theo thanh th\u00e9p.<\/td>\n<\/tr>\n
\u0110\u1eb7c \u0111i\u1ec3m nh\u1eadn bi\u1ebft<\/td>\nN\u1ee9t ch\u1ea1y song song c\u1ed1t th\u00e9p, th\u01b0\u1eddng th\u1ea5y \u1edf d\u1ea7m, c\u1ed9t. N\u1ee9t xu\u1ea5t hi\u1ec7n ngay ph\u00eda tr\u00ean thanh th\u00e9p.<\/td>\n<\/tr>\n
Th\u1eddi \u0111i\u1ec3m xu\u1ea5t hi\u1ec7n<\/td>\nV\u00e0i gi\u1edd \u0111\u1ea7u sau khi \u0111\u1ed5.<\/td>\n<\/tr>\n
Nguy\u00ean nh\u00e2n ch\u00ednh<\/td>\nC\u1ed1t th\u00e9p b\u1ed1 tr\u00ed d\u00e0y, \u0111\u1ea7m kh\u00f4ng k\u1ef9, \u0111\u1ed9 s\u1ee5t cao, c\u1ed1p pha v\u00f5ng.<\/td>\n<\/tr>\n
Ph\u00f2ng ng\u1eeba<\/td>\n\u0110\u1ea7m rung \u0111\u1ee7 th\u1eddi gian, ki\u1ec3m so\u00e1t \u0111\u1ed9 s\u1ee5t theo thi\u1ebft k\u1ebf, gia c\u1ed1 c\u1ed1p pha ch\u1eafc ch\u1eafn; kh\u00f4ng thay \u0111\u1ed5i ti\u1ebft di\u1ec7n \u0111\u1ed9t ng\u1ed9t.<\/td>\n<\/tr>\n
X\u1eed l\u00fd<\/td>\nH\u01b0\u1edbng d\u1eabn x\u1eed l\u00fd \u0111\u1ed1i v\u1edbi tr\u01b0\u1eddng h\u1ee3p n\u1ee9t trong v\u00f2ng 24h \u0111\u1ea7u ti\u00ean sau khi \u0111\u1ed5<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

N\u1ee9t ch\u00e2n chim<\/span><\/strong><\/h3>\n

N\u1ee9t ch\u00e2n chim l\u00e0 lo\u1ea1i v\u00f4 h\u1ea1i nh\u1ea5t trong 9 lo\u1ea1i, ch\u1ec9 \u1ea3nh h\u01b0\u1edfng th\u1ea9m m\u1ef9, kh\u00f4ng \u0111e d\u1ecda k\u1ebft c\u1ea5u. Tuy nhi\u00ean, ch\u00fang ta c\u1ea7n ph\u00e2n bi\u1ec7t v\u1edbi n\u1ee9t ph\u1ea3n \u1ee9ng ki\u1ec1m-silic c\u00f3 h\u00ecnh d\u1ea1ng t\u01b0\u01a1ng t\u1ef1.<\/span><\/p>\n

\"n\u1ee9t
N\u1ee9t ch\u00e2n chim l\u00e0 c\u00e1c v\u1ebft n\u1ee9t nh\u1ecf d\u1ea1ng m\u1ea1ng l\u01b0\u1edbi tr\u00ean b\u1ec1 m\u1eb7t b\u00ea t\u00f4ng.<\/em><\/figcaption><\/figure>\n\n\n\n\n\n\n\n\n\n
H\u1ea1ng m\u1ee5c<\/th>\nContent<\/th>\n<\/tr>\n
C\u01a1 ch\u1ebf<\/td>\nL\u1edbp h\u1ed3 xi m\u0103ng tr\u00ean b\u1ec1 m\u1eb7t co ng\u00f3t nhi\u1ec1u h\u01a1n l\u1edbp b\u00ean d\u01b0\u1edbi, d\u1eabn \u0111\u1ebfn t\u1ea1o m\u1ea1ng l\u01b0\u1edbi n\u1ee9t nh\u1ecf.<\/td>\n<\/tr>\n
\u0110\u1eb7c \u0111i\u1ec3m nh\u1eadn bi\u1ebft<\/td>\nH\u00ecnh d\u1ea1ng gi\u1ed1ng da c\u00e1 s\u1ea5u, n\u1ee9t r\u1ea5t nh\u1ecf (< 0.1 mm), ch\u1ec9 \u1edf l\u1edbp m\u1eb7t, kh\u00f4ng xuy\u00ean s\u00e2u.<\/td>\n<\/tr>\n
Th\u1eddi \u0111i\u1ec3m xu\u1ea5t hi\u1ec7n<\/td>\nSau khi b\u1ec1 m\u1eb7t b\u00ea t\u00f4ng kh\u00f4.<\/td>\n<\/tr>\n
Nguy\u00ean nh\u00e2n ch\u00ednh<\/td>\nXoa m\u1eb7t qu\u00e1 s\u1edbm khi c\u00f2n n\u01b0\u1edbc n\u1ed5i, r\u1eafc xi m\u0103ng kh\u00f4, b\u1ec1 m\u1eb7t m\u1ea5t n\u01b0\u1edbc nhanh.<\/td>\n<\/tr>\n
Ph\u00f2ng ng\u1eeba<\/td>\nKh\u00f4ng xoa khi c\u00f2n n\u01b0\u1edbc n\u1ed5i, kh\u00f4ng r\u1eafc xi m\u0103ng kh\u00f4, b\u1ea3o d\u01b0\u1ee1ng s\u1edbm.<\/td>\n<\/tr>\n
X\u1eed l\u00fd<\/td>\nPh\u1ee7 l\u1edbp ch\u1ed1ng th\u1ea5m, m\u00e0i v\u00e0 ph\u1ee7 l\u1edbp b\u1ea3o v\u1ec7 n\u1ebfu y\u00eau c\u1ea7u th\u1ea9m m\u1ef9 cao.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

N\u1ee9t co ng\u00f3t kh\u00f4<\/span><\/strong><\/h3>\n

\u0110\u00e2y l\u00e0 lo\u1ea1i n\u1ee9t ph\u1ed5 bi\u1ebfn nh\u1ea5t trong c\u00f4ng tr\u00ecnh d\u00e2n d\u1ee5ng. S\u00e0n b\u00ea t\u00f4ng n\u1ee9t co ng\u00f3t kh\u00f4 th\u01b0\u1eddng l\u00e0m ch\u1ee7 nh\u00e0 lo l\u1eafng d\u00f9 th\u1ef1c t\u1ebf c\u00f3 th\u1ec3 ki\u1ec3m so\u00e1t \u0111\u01b0\u1ee3c b\u1eb1ng vi\u1ec7c b\u1ea3o d\u01b0\u1ee1ng b\u00ea t\u00f4ng \u0111\u00fang k\u1ef9 thu\u1eadt<\/a><\/strong>.<\/span><\/p>\n

\"v\u1ebft
N\u1ee9t co ng\u00f3t kh\u00f4 x\u1ea3y ra khi b\u00ea t\u00f4ng m\u1ea5t n\u01b0\u1edbc trong qu\u00e1 tr\u00ecnh s\u1eed d\u1ee5ng.<\/em><\/figcaption><\/figure>\n\n\n\n\n\n\n\n\n\n
H\u1ea1ng m\u1ee5c<\/th>\nContent<\/th>\n<\/tr>\n
C\u01a1 ch\u1ebf<\/td>\nB\u00ea t\u00f4ng gi\u1ea3m th\u1ec3 t\u00edch khi kh\u00f4. N\u1ebfu c\u1ea5u ki\u1ec7n b\u1ecb gi\u1eef c\u1ed1 \u0111\u1ecbnh b\u1edfi m\u00f3ng, t\u01b0\u1eddng ho\u1eb7c d\u1ea7m, khi\u1ebfn ch\u00fang kh\u00f4ng co t\u1ef1 do, l\u00e0m ph\u00e1t sinh \u1ee9ng su\u1ea5t k\u00e9o, d\u1eabn \u0111\u1ebfn n\u1ee9t.<\/td>\n<\/tr>\n
\u0110\u1eb7c \u0111i\u1ec3m nh\u1eadn bi\u1ebft<\/td>\nV\u1ebft n\u1ee9t m\u1ea3nh, th\u01b0\u1eddng t\u1ea1o d\u1ea1ng l\u01b0\u1edbi, r\u1ed9ng 0.1\u20130.5 mm, th\u01b0\u1eddng g\u1eb7p \u1edf s\u00e0n n\u1ec1n, t\u01b0\u1eddng d\u00e0i.<\/td>\n<\/tr>\n
Xu\u1ea5t hi\u1ec7n<\/td>\nT\u1eeb 7 ng\u00e0y \u0111\u1ebfn v\u00e0i th\u00e1ng sau khi \u0111\u1ed5, khi b\u00ea t\u00f4ng b\u1eaft \u0111\u1ea7u m\u1ea5t n\u01b0\u1edbc l\u00e2u d\u00e0i.<\/td>\n<\/tr>\n
Nguy\u00ean nh\u00e2n ch\u00ednh<\/td>\nT\u1ef7 l\u1ec7 n\u01b0\u1edbc\/xi m\u0103ng cao, h\u00e0m l\u01b0\u1ee3ng xi m\u0103ng l\u1edbn, kh\u00f4ng b\u1ed1 tr\u00ed khe co gi\u00e3n, b\u1ea3o d\u01b0\u1ee1ng kh\u00f4ng \u0111\u1ee7 th\u1eddi gian.<\/td>\n<\/tr>\n
Ph\u00f2ng ng\u1eeba<\/td>\nGi\u1eef \u1ea9m li\u00ean t\u1ee5c t\u1ed1i thi\u1ec3u 7\u201314 ng\u00e0y, b\u1ed1 tr\u00ed khe co gi\u00e3n c\u00e1ch 3\u20136 m, s\u1eed d\u1ee5ng ph\u1ee5 gia gi\u1ea3m co ng\u00f3t.<\/td>\n<\/tr>\n
X\u1eed l\u00fd<\/td>\nC\u1eaft khe b\u1ed5 sung, tr\u00e1m khe b\u1eb1ng keo polyurethane linh ho\u1ea1t.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

N\u1ee9t do nhi\u1ec7t (Thu\u1ef7 ho\u00e1)<\/span><\/strong><\/h3>\n

Khi \u0111\u1ed5 b\u00ea t\u00f4ng kh\u1ed1i l\u1edbn th\u01b0\u1eddng s\u1ebd xu\u1ea5t hi\u1ec7n lo\u1ea1i n\u1ee9t do nhi\u1ec7t n\u00e0y. B\u00ea t\u00f4ng b\u1ecb n\u1ee9t th\u01b0\u1eddng n\u1eb1m \u1edf m\u00f3ng b\u00e8, \u0111\u00e0i c\u1ecdc l\u1edbn v\u00e0 r\u1ea5t nghi\u00eam tr\u1ecdng n\u1ebfu kh\u00f4ng ki\u1ec3m so\u00e1t t\u1ed1t.<\/span><\/p>\n

\"n\u1ee9t
Ch\u00eanh l\u1ec7ch nhi\u1ec7t \u0111\u1ed9 trong qu\u00e1 tr\u00ecnh th\u1ee7y h\u00f3a c\u00f3 th\u1ec3 g\u00e2y n\u1ee9t b\u00ea t\u00f4ng kh\u1ed1i l\u1edbn.<\/em><\/figcaption><\/figure>\n\n\n\n\n\n\n\n\n\n
H\u1ea1ng m\u1ee5c<\/th>\nContent<\/th>\n<\/tr>\n
C\u01a1 ch\u1ebf<\/td>\nPh\u1ea3n \u1ee9ng th\u1ee7y h\u00f3a xi m\u0103ng sinh nhi\u1ec7t l\u1edbn. Ph\u1ea7n l\u00f5i b\u00ea t\u00f4ng n\u00f3ng l\u00ean nh\u01b0ng b\u1ec1 m\u1eb7t ti\u1ebfp x\u00fac kh\u00f4ng kh\u00ed ngu\u1ed9i nhanh, \u1ee9ng su\u1ea5t k\u00e9o sinh ra, d\u1eabn \u0111\u1ebfn n\u1ee9t.<\/td>\n<\/tr>\n
\u0110\u1eb7c \u0111i\u1ec3m nh\u1eadn bi\u1ebft<\/td>\nV\u1ebft n\u1ee9t d\u00e0i, c\u00f3 th\u1ec3 xuy\u00ean s\u00e2u; th\u01b0\u1eddng ch\u1ea1y d\u1ecdc theo c\u1ea5u ki\u1ec7n l\u1edbn.<\/td>\n<\/tr>\n
Xu\u1ea5t hi\u1ec7n<\/td>\n1\u20133 ng\u00e0y \u0111\u1ea7u; \u0111\u1eb7c bi\u1ec7t trong b\u00ea t\u00f4ng kh\u1ed1i l\u1edbn (m\u00f3ng b\u00e8, \u0111\u00e0i c\u1ecdc l\u1edbn).<\/td>\n<\/tr>\n
Nguy\u00ean nh\u00e2n ch\u00ednh<\/td>\nXi m\u0103ng t\u1ecfa nhi\u1ec7t cao; \u0111\u1ed5 kh\u1ed1i l\u01b0\u1ee3ng l\u1edbn trong th\u1eddi ti\u1ebft n\u00f3ng; kh\u00f4ng ki\u1ec3m so\u00e1t nhi\u1ec7t.<\/td>\n<\/tr>\n
Ph\u00f2ng ng\u1eeba<\/td>\nD\u00f9ng xi m\u0103ng \u00edt t\u1ecfa nhi\u1ec7t; l\u00e0m m\u00e1t c\u1ed1t li\u1ec7u v\u00e0 n\u01b0\u1edbc tr\u1ed9n; \u0111\u1ed5 b\u00ea t\u00f4ng theo l\u1edbp; che ph\u1ee7 gi\u1eef nhi\u1ec7t \u1ed5n \u0111\u1ecbnh.<\/td>\n<\/tr>\n
X\u1eed l\u00fd<\/td>\nB\u01a1m epoxy n\u1ebfu n\u1ee9t s\u00e2u, gia c\u1ed1 n\u1ebfu c\u1ea7n.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

N\u1ee9t do \u0103n m\u00f2n c\u1ed1t th\u00e9p<\/span><\/strong><\/h3>\n

\u0110\u00e2y l\u00e0 lo\u1ea1i n\u1ee9t b\u00ea t\u00f4ng nguy hi\u1ec3m nh\u1ea5t trong c\u00e1c v\u1ebft n\u1ee9t li\u00ean quan \u0111\u1ebfn c\u1ed1t th\u00e9p. Ph\u1ed5 bi\u1ebfn \u1edf c\u00f4ng tr\u00ecnh ven bi\u1ec3n ho\u1eb7c c\u00f4ng tr\u00ecnh l\u00e2u n\u0103m kh\u00f4ng \u0111\u01b0\u1ee3c b\u1ea3o tr\u00ec.<\/span><\/p>\n

\"n\u1ee9t
\u0102n m\u00f2n c\u1ed1t th\u00e9p l\u00e0m t\u0103ng th\u1ec3 t\u00edch v\u00e0 g\u00e2y n\u1ee9t l\u1edbp b\u00ea t\u00f4ng b\u1ea3o v\u1ec7.<\/em><\/figcaption><\/figure>\n\n\n\n\n\n\n\n\n\n
H\u1ea1ng m\u1ee5c<\/th>\nContent<\/th>\n<\/tr>\n
C\u01a1 ch\u1ebf<\/td>\nN\u01b0\u1edbc v\u00e0 oxy th\u1ea5m v\u00e0o khi\u1ebfn th\u00e9p b\u1ecb g\u1ec9, th\u1ec3 t\u00edch t\u0103ng 2\u20136 l\u1ea7n, g\u00e2y \u00e1p l\u1ef1c l\u00ean l\u1edbp b\u00ea t\u00f4ng b\u1ea3o v\u1ec7, d\u1eabn \u0111\u1ebfn n\u1ee9t v\u00e0 bong tr\u00f3c.<\/td>\n<\/tr>\n
\u0110\u1eb7c \u0111i\u1ec3m nh\u1eadn bi\u1ebft<\/td>\nN\u1ee9t song song theo thanh th\u00e9p, c\u00f3 v\u1ebft \u1ed1 m\u00e0u g\u1ec9, b\u00ea t\u00f4ng bong l\u1edbp b\u1ea3o v\u1ec7.<\/td>\n<\/tr>\n
Th\u1eddi \u0111i\u1ec3m xu\u1ea5t hi\u1ec7n<\/td>\nSau v\u00e0i n\u0103m s\u1eed d\u1ee5ng, ph\u1ee5 thu\u1ed9c m\u00f4i tr\u01b0\u1eddng v\u00e0 chi\u1ec1u d\u00e0y l\u1edbp b\u1ea3o v\u1ec7.<\/td>\n<\/tr>\n
Nguy\u00ean nh\u00e2n ch\u00ednh<\/td>\nL\u1edbp b\u1ea3o v\u1ec7 m\u1ecfng (< 25 mm), kh\u00f4ng ch\u1ed1ng th\u1ea5m, m\u00f4i tr\u01b0\u1eddng bi\u1ec3n, axit.<\/td>\n<\/tr>\n
Ph\u00f2ng ng\u1eeba<\/td>\n\u0110\u1ea3m b\u1ea3o chi\u1ec1u d\u00e0y l\u1edbp b\u1ea3o v\u1ec7 \u2265 25\u201340 mm, ch\u1ed1ng th\u1ea5m t\u1ed1t, d\u00f9ng ph\u1ee5 gia ch\u1ed1ng th\u1ea5m, ch\u1ed1ng \u0103n m\u00f2n.<\/td>\n<\/tr>\n
X\u1eed l\u00fd<\/td>\n\u0110\u1ee5c b\u1ecf ph\u1ea7n b\u00ea t\u00f4ng h\u1ecfng, l\u00e0m s\u1ea1ch th\u00e9p, ph\u1ee7 ch\u1ed1ng g\u1ec9 v\u00e0 tr\u00e1m l\u1ea1i b\u1eb1ng v\u1eefa s\u1eeda ch\u1eefa.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

N\u1ee9t k\u1ebft c\u1ea5u<\/span><\/strong><\/h3>\n

N\u1ee9t k\u1ebft c\u1ea5u l\u00e0 nh\u00f3m \u0111\u00e1ng lo ng\u1ea1i nh\u1ea5t, v\u00ec li\u00ean quan \u0111\u1ebfn an to\u00e0n c\u00f4ng tr\u00ecnh v\u00e0 lu\u00f4n c\u1ea7n k\u1ef9 s\u01b0 k\u1ebft c\u1ea5u \u0111\u00e1nh gi\u00e1.<\/span><\/p>\n

\"v\u1ebft
N\u1ee9t k\u1ebft c\u1ea5u xu\u1ea5t hi\u1ec7n khi \u1ee9ng su\u1ea5t v\u01b0\u1ee3t qu\u00e1 kh\u1ea3 n\u0103ng ch\u1ecbu k\u00e9o c\u1ee7a b\u00ea t\u00f4ng.<\/em><\/figcaption><\/figure>\n\n\n\n\n\n\n\n\n\n
H\u1ea1ng m\u1ee5c<\/th>\nContent<\/th>\n<\/tr>\n
C\u01a1 ch\u1ebf<\/td>\nB\u00ea t\u00f4ng ch\u1ecbu k\u00e9o k\u00e9m. Khi t\u1ea3i tr\u1ecdng g\u00e2y \u1ee9ng su\u1ea5t k\u00e9o v\u01b0\u1ee3t c\u01b0\u1eddng \u0111\u1ed9 ch\u1ecbu k\u00e9o c\u1ee7a b\u00ea t\u00f4ng th\u00ec n\u1ee9t xu\u1ea5t hi\u1ec7n t\u1ea1i v\u00f9ng ch\u1ecbu k\u00e9o l\u1edbn nh\u1ea5t.<\/td>\n<\/tr>\n
\u0110\u1eb7c \u0111i\u1ec3m nh\u1eadn bi\u1ebft<\/td>\nN\u1ee9t \u0111\u1ee9ng \u1edf gi\u1eefa nh\u1ecbp d\u1ea7m, n\u1ee9t xi\u00ean g\u1ea7n g\u1ed1i, n\u1ee9t d\u1ecdc c\u1ed9t.<\/td>\n<\/tr>\n
Th\u1eddi \u0111i\u1ec3m xu\u1ea5t hi\u1ec7n<\/td>\nSau khi c\u1ea5u ki\u1ec7n b\u1eaft \u0111\u1ea7u ch\u1ecbu t\u1ea3i.<\/td>\n<\/tr>\n
Nguy\u00ean nh\u00e2n ch\u00ednh<\/td>\nThi\u1ebfu c\u1ed1t th\u00e9p, thi c\u00f4ng sai h\u1ed3 s\u01a1, thay \u0111\u1ed5i c\u00f4ng n\u0103ng (t\u0103ng t\u1ea3i).<\/td>\n<\/tr>\n
Ph\u00f2ng ng\u1eeba<\/td>\nKi\u1ec3m tra thi\u1ebft k\u1ebf k\u1ef9 tr\u01b0\u1edbc thi c\u00f4ng, thi c\u00f4ng \u0111\u00fang b\u1ea3n v\u1ebd, kh\u00f4ng t\u1ef1 \u00fd thay \u0111\u1ed5i t\u1ea3i tr\u1ecdng.<\/td>\n<\/tr>\n
X\u1eed l\u00fd<\/td>\nD\u00e1n s\u1ee3i carbon FRP, b\u1ed5 sung th\u00e9p h\u00ecnh, gia c\u01b0\u1eddng b\u1ea3n th\u00e9p neo bulong.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

N\u1ee9t do qu\u00e1 t\u1ea3i<\/span><\/strong><\/h3>\n

N\u1ee9t qu\u00e1 t\u1ea3i th\u01b0\u1eddng xu\u1ea5t hi\u1ec7n khi c\u00f4ng tr\u00ecnh b\u1ecb n\u00e2ng t\u1ea7ng, thay \u0111\u1ed5i c\u00f4ng n\u0103ng ho\u1eb7c \u0111\u1eb7t thi\u1ebft b\u1ecb n\u1eb7ng ngo\u00e0i thi\u1ebft k\u1ebf ban \u0111\u1ea7u.<\/span><\/p>\n

\"n\u1ee9t
N\u1ee9t do qu\u00e1 t\u1ea3i x\u1ea3y ra khi c\u00f4ng tr\u00ecnh ch\u1ecbu t\u1ea3i v\u01b0\u1ee3t thi\u1ebft k\u1ebf ban \u0111\u1ea7u.<\/em><\/figcaption><\/figure>\n\n\n\n\n\n\n\n\n\n
H\u1ea1ng m\u1ee5c<\/th>\nContent<\/th>\n<\/tr>\n
C\u01a1 ch\u1ebf<\/td>\n\u1ee8ng su\u1ea5t trong c\u1ea5u ki\u1ec7n v\u01b0\u1ee3t kh\u1ea3 n\u0103ng thi\u1ebft k\u1ebf, n\u00ean b\u00ea t\u00f4ng v\u00f9ng ch\u1ecbu k\u00e9o n\u1ee9t d\u1ea7n theo th\u1eddi gian.<\/td>\n<\/tr>\n
\u0110\u1eb7c \u0111i\u1ec3m nh\u1eadn bi\u1ebft<\/td>\nN\u1ee9t t\u0103ng d\u1ea7n theo th\u1eddi gian, s\u00e0n v\u00f5ng, xu\u1ea5t hi\u1ec7n \u1edf v\u1ecb tr\u00ed t\u1eadp trung t\u1ea3i.<\/td>\n<\/tr>\n
Th\u1eddi \u0111i\u1ec3m xu\u1ea5t hi\u1ec7n<\/td>\nKhi c\u00f4ng tr\u00ecnh b\u1ecb qu\u00e1 t\u1ea3i trong s\u1eed d\u1ee5ng.<\/td>\n<\/tr>\n
Nguy\u00ean nh\u00e2n ch\u00ednh<\/td>\nN\u00e2ng t\u1ea7ng, \u0111\u1eb7t thi\u1ebft b\u1ecb n\u1eb7ng, thay \u0111\u1ed5i c\u00f4ng n\u0103ng kh\u00f4ng t\u00ednh to\u00e1n l\u1ea1i k\u1ebft c\u1ea5u.<\/td>\n<\/tr>\n
Ph\u00f2ng ng\u1eeba<\/td>\nKi\u1ec3m \u0111\u1ecbnh tr\u01b0\u1edbc khi c\u1ea3i t\u1ea1o, t\u00ednh to\u00e1n l\u1ea1i k\u1ebft c\u1ea5u b\u00ea t\u00f4ng tr\u01b0\u1edbc khi t\u0103ng t\u1ea3i.<\/td>\n<\/tr>\n
X\u1eed l\u00fd<\/td>\nGia c\u01b0\u1eddng b\u1eb1ng th\u00e9p h\u00ecnh, t\u0103ng ti\u1ebft di\u1ec7n c\u1ea5u ki\u1ec7n.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

N\u1ee9t do ph\u1ea3n \u1ee9ng ki\u1ec1m – Silic (ASR)<\/span><\/strong><\/h3>\n

\u0110\u00e2y l\u00e0 lo\u1ea1i n\u1ee9t kh\u00f3 ph\u00e1t hi\u1ec7n s\u1edbm nh\u1ea5t v\u00ec xu\u1ea5t hi\u1ec7n sau 2\u20135 n\u0103m ho\u1eb7c l\u00e2u h\u01a1n, v\u00e0 th\u01b0\u1eddng b\u1ecb nh\u1ea7m v\u1edbi n\u1ee9t co ng\u00f3t do h\u00ecnh d\u1ea1ng t\u01b0\u01a1ng t\u1ef1.<\/span><\/p>\n

\"n\u1ee9t
Ph\u1ea3n \u1ee9ng ki\u1ec1m \u2013 silic gi\u1eefa xi m\u0103ng v\u00e0 c\u1ed1t li\u1ec7u c\u00f3 th\u1ec3 g\u00e2y n\u1ee9t b\u00ea t\u00f4ng d\u1ea1ng m\u1ea1ng.<\/figcaption><\/figure>\n\n\n\n\n\n\n\n\n\n
H\u1ea1ng m\u1ee5c<\/th>\nContent<\/th>\n<\/tr>\n
C\u01a1 ch\u1ebf<\/td>\nKi\u1ec1m trong xi m\u0103ng ph\u1ea3n \u1ee9ng v\u1edbi silic ho\u1ea1t t\u00ednh trong c\u1ed1t li\u1ec7u, t\u1ea1o gel tr\u01b0\u01a1ng n\u1edf khi g\u1eb7p \u1ea9m, t\u1ea1o \u00e1p l\u1ef1c n\u1ed9i b\u1ed9 n\u00ean xu\u1ea5t hi\u1ec7n n\u1ee9t d\u1ea1ng b\u1ea3n \u0111\u1ed3.<\/td>\n<\/tr>\n
\u0110\u1eb7c \u0111i\u1ec3m nh\u1eadn bi\u1ebft<\/td>\nN\u1ee9t h\u00ecnh m\u1ea1ng l\u01b0\u1edbi l\u1edbn (d\u1ea1ng b\u1ea3n \u0111\u1ed3), c\u00f3 th\u1ec3 c\u00f3 ch\u1ea5t tr\u1eafng r\u1ec9 ra ngo\u00e0i (gel ASR).<\/td>\n<\/tr>\n
Th\u1eddi \u0111i\u1ec3m xu\u1ea5t hi\u1ec7n<\/td>\nSau 2\u20135 n\u0103m ho\u1eb7c l\u00e2u h\u01a1n.<\/td>\n<\/tr>\n
Nguy\u00ean nh\u00e2n ch\u00ednh<\/td>\nC\u1ed1t li\u1ec7u kh\u00f4ng \u0111\u1ea1t chu\u1ea9n (c\u00f3 silic ho\u1ea1t t\u00ednh), m\u00f4i tr\u01b0\u1eddng \u1ea9m li\u00ean t\u1ee5c.<\/td>\n<\/tr>\n
Ph\u00f2ng ng\u1eeba<\/td>\nKi\u1ec3m so\u00e1t ngu\u1ed3n c\u1ed1t li\u1ec7u, d\u00f9ng xi m\u0103ng h\u00e0m l\u01b0\u1ee3ng ki\u1ec1m th\u1ea5p, gi\u1ea3m \u0111\u1ed9 \u1ea9m ti\u1ebfp x\u00fac l\u00e2u d\u00e0i.<\/td>\n<\/tr>\n
X\u1eed l\u00fd<\/td>\nH\u1ea1n ch\u1ebf th\u1ea5m n\u01b0\u1edbc (ng\u0103n \u1ea9m x\u00e2m nh\u1eadp), gia c\u01b0\u1eddng n\u1ebfu c\u1ea7n.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

B\u1ea3ng t\u1ed5ng h\u1ee3p so s\u00e1nh 9 lo\u1ea1i n\u1ee9t b\u00ea t\u00f4ng<\/span><\/strong><\/h2>\n

B\u1ea3ng d\u01b0\u1edbi \u0111\u00e2y gi\u00fap b\u1ea1n nh\u1eadn bi\u1ebft nhanh v\u00e0 x\u00e1c \u0111\u1ecbnh m\u1ee9c \u0111\u1ed9 nghi\u00eam tr\u1ecdng t\u1eebng lo\u1ea1i n\u1ee9t b\u00ea t\u00f4ng:<\/span><\/span><\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n
Lo\u1ea1i n\u1ee9t<\/th>\nTh\u1eddi \u0111i\u1ec3m<\/th>\nH\u00ecnh d\u1ea1ng \u0111\u1eb7c tr\u01b0ng<\/th>\nX\u1eed l\u00fd ngay<\/th>\n<\/tr>\n
Co ng\u00f3t d\u1ebbo<\/td>\n30 ph\u00fat \u2013 6 gi\u1edd<\/td>\nSong song, ph\u00e2n b\u1ed1 ng\u1eabu nhi\u00ean, r\u1ed9ng 0.3\u20132 mm<\/td>\nN\u1ebfu n\u1ee9t l\u1edbn<\/td>\n<\/tr>\n
L\u00fan d\u1ebbo<\/td>\nV\u00e0i gi\u1edd \u0111\u1ea7u<\/td>\nSong song c\u1ed1t th\u00e9p, d\u1ecdc theo d\u1ea7m\/c\u1ed9t<\/td>\nC\u1ea7n theo d\u00f5i<\/td>\n<\/tr>\n
Ch\u00e2n chim<\/td>\nSau khi b\u1ec1 m\u1eb7t kh\u00f4<\/td>\nM\u1ea1ng l\u01b0\u1edbi nh\u1ecf < 0.1 mm, ch\u1ec9 \u1edf l\u1edbp m\u1eb7t<\/td>\nKh\u00f4ng<\/td>\n<\/tr>\n
Co ng\u00f3t kh\u00f4<\/td>\n7 ng\u00e0y \u2013 v\u00e0i th\u00e1ng<\/td>\nL\u01b0\u1edbi m\u1ea3nh 0.1\u20130.5 mm, s\u00e0n n\u1ec1n\/t\u01b0\u1eddng d\u00e0i<\/td>\nN\u1ebfu th\u1ea5m n\u01b0\u1edbc<\/td>\n<\/tr>\n
N\u1ee9t nhi\u1ec7t<\/td>\n1\u20133 ng\u00e0y \u0111\u1ea7u<\/td>\nD\u00e0i, xuy\u00ean s\u00e2u, d\u1ecdc c\u1ea5u ki\u1ec7n l\u1edbn<\/td>\nC\u00f3<\/td>\n<\/tr>\n
\u0102n m\u00f2n c\u1ed1t th\u00e9p<\/td>\nSau v\u00e0i n\u0103m<\/td>\nSong song th\u00e9p, k\u00e8m g\u1ec9 s\u00e9t, b\u00ea t\u00f4ng bong<\/td>\nC\u00f3, kh\u1ea9n tr\u01b0\u01a1ng<\/td>\n<\/tr>\n
K\u1ebft c\u1ea5u<\/td>\nKhi ch\u1ecbu t\u1ea3i<\/td>\n\u0110\u1ee9ng\/xi\u00ean\/d\u1ecdc t\u00f9y v\u1ecb tr\u00ed ch\u1ecbu l\u1ef1c<\/td>\nC\u00f3, kh\u1ea9n tr\u01b0\u01a1ng<\/td>\n<\/tr>\n
Qu\u00e1 t\u1ea3i<\/td>\nKhi v\u01b0\u1ee3t t\u1ea3i thi\u1ebft k\u1ebf<\/td>\nT\u0103ng d\u1ea7n, s\u00e0n v\u00f5ng, t\u1eadp trung \u1edf \u0111i\u1ec3m t\u1ea3i<\/td>\nC\u00f3, kh\u1ea9n tr\u01b0\u01a1ng<\/td>\n<\/tr>\n
Ki\u1ec1m \u2013 Silic (ASR)<\/td>\n2\u20135 n\u0103m+<\/td>\nM\u1ea1ng l\u01b0\u1edbi l\u1edbn d\u1ea1ng b\u1ea3n \u0111\u1ed3, c\u00f3 gel tr\u1eafng<\/td>\nC\u00f3<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

V\u1ebft n\u1ee9t cho ph\u00e9p c\u1ee7a b\u00ea t\u00f4ng theo ti\u00eau chu\u1ea9n<\/span><\/strong><\/h2>\n

Kh\u00f4ng ph\u1ea3i m\u1ecdi v\u1ebft n\u1ee9t b\u00ea t\u00f4ng \u0111\u1ec1u v\u01b0\u1ee3t gi\u1edbi h\u1ea1n cho ph\u00e9p. Theo TCVN 5574:2018<\/strong> v\u00e0 c\u00e1c ti\u00eau chu\u1ea9n thi\u1ebft k\u1ebf k\u1ebft c\u1ea5u b\u00ea t\u00f4ng qu\u1ed1c t\u1ebf<\/strong>, chi\u1ec1u r\u1ed9ng v\u1ebft n\u1ee9t cho ph\u00e9p th\u01b0\u1eddng n\u1eb1m trong kho\u1ea3ng sau.<\/span><\/p>\n\n\n\n\n\n\n\n\n
\u0110i\u1ec1u ki\u1ec7n m\u00f4i tr\u01b0\u1eddng<\/th>\nChi\u1ec1u r\u1ed9ng n\u1ee9t cho ph\u00e9p (mm)<\/th>\n\u00c1p d\u1ee5ng cho<\/th>\n<\/tr>\n
B\u00ecnh th\u01b0\u1eddng (kh\u00f4 r\u00e1o, trong nh\u00e0)<\/td>\n0.3 mm<\/td>\nS\u00e0n nh\u00e0, d\u1ea7m trong nh\u00e0 kh\u00f4ng ti\u1ebfp x\u00fac \u1ea9m<\/td>\n<\/tr>\n
\u1ea8m \u01b0\u1edbt, ngo\u00e0i tr\u1eddi<\/td>\n0.2 mm<\/td>\nM\u00e1i, t\u01b0\u1eddng ngo\u00e0i, s\u00e0n ban c\u00f4ng<\/td>\n<\/tr>\n
Ti\u1ebfp x\u00fac h\u00f3a ch\u1ea5t nh\u1eb9<\/td>\n0.15 mm<\/td>\nH\u1ea7m \u0111\u1ec3 xe, s\u00e0n c\u00f4ng nghi\u1ec7p<\/td>\n<\/tr>\n
M\u00f4i tr\u01b0\u1eddng bi\u1ec3n, x\u00e2m th\u1ef1c cao<\/td>\n0.1 mm<\/td>\nC\u00f4ng tr\u00ecnh ven bi\u1ec3n, c\u1ea3ng, \u0111\u1eadp n\u01b0\u1edbc<\/td>\n<\/tr>\n
C\u1ea5u ki\u1ec7n d\u1ef1 \u1ee9ng l\u1ef1c<\/td>\nKh\u00f4ng cho ph\u00e9p n\u1ee9t<\/td>\nD\u1ea7m d\u1ef1 \u1ee9ng l\u1ef1c, b\u1ec3 ch\u1ee9a \u00e1p l\u1ef1c<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Ngu\u1ed3n tham kh\u1ea3o: TCVN 5574:2018 \u2013 Ph\u1ee5 l\u1ee5c G, B\u1ea3ng G.3<\/a>.<\/strong><\/span><\/p>\n

Note:<\/strong><\/em> Con s\u1ed1 tr\u00ean l\u00e0 gi\u1edbi h\u1ea1n cho ph\u00e9p v\u1ec1 m\u1eb7t k\u1ebft c\u1ea5u. N\u1ebfu v\u1ebft n\u1ee9t v\u01b0\u1ee3t gi\u00e1 tr\u1ecb n\u00e0y, ngay c\u1ea3 khi kh\u00f4ng th\u1ea5y nguy hi\u1ec3m b\u1ec1 ngo\u00e0i, v\u1eabn c\u1ea7n \u0111\u00e1nh gi\u00e1 v\u00e0 c\u00f3 bi\u1ec7n ph\u00e1p x\u1eed l\u00fd.<\/span><\/p>\n

C\u00e1ch x\u1eed l\u00fd b\u00ea t\u00f4ng b\u1ecb n\u1ee9t theo t\u1eebng lo\u1ea1i<\/span><\/strong><\/h2>\n

Nguy\u00ean t\u1eafc c\u1ed1t l\u00f5i khi x\u1eed l\u00fd b\u00ea t\u00f4ng b\u1ecb n\u1ee9t: Ph\u1ea3i x\u1eed l\u00fd \u0111\u00fang nguy\u00ean nh\u00e2n g\u1ed1c, kh\u00f4ng ch\u1ec9 tr\u00e1m b\u1ec1 m\u1eb7t. Tr\u00e1m k\u00edn v\u1ebft n\u1ee9t m\u00e0 kh\u00f4ng gi\u1ea3i quy\u1ebft tri\u1ec7t \u0111\u1ec3 nguy\u00ean nh\u00e2n s\u1ebd khi\u1ebfn n\u1ee9t xu\u1ea5t hi\u1ec7n l\u1ea1i ho\u1eb7c lan r\u1ed9ng h\u01a1n.<\/span><\/p>\n

\"C\u00e1ch
C\u00e1ch x\u1eed l\u00fd b\u00ea t\u00f4ng b\u1ecb n\u1ee9t theo t\u1eebng lo\u1ea1i<\/em><\/figcaption><\/figure>\n

Nh\u00f3m 1 – N\u1ee9t b\u1ec1 m\u1eb7t, kh\u00f4ng nguy hi\u1ec3m k\u1ebft c\u1ea5u<\/span><\/strong><\/h3>\n

\u00c1p d\u1ee5ng cho: N\u1ee9t ch\u00e2n chim, n\u1ee9t co ng\u00f3t kh\u00f4 nh\u1eb9<\/span><\/strong>
\n\u2022 V\u1ec7 sinh v\u1ebft n\u1ee9t, th\u1ed5i s\u1ea1ch b\u1ee5i b\u1ea9n<\/span>
\n\u2022 Tr\u00e1m b\u1eb1ng keo epoxy ho\u1eb7c v\u1eefa polymer chuy\u00ean d\u1ee5ng<\/span>
\n\u2022 Ph\u1ee7 l\u1edbp ch\u1ed1ng th\u1ea5m b\u1ec1 m\u1eb7t n\u1ebfu c\u00f3 y\u00eau c\u1ea7u<\/span>
\n\u2022 Kh\u00f4ng c\u1ea7n gia c\u1ed1 k\u1ebft c\u1ea5u<\/span><\/p>\n

Nh\u00f3m 2 – N\u1ee9t v\u1eeba, c\u1ea7n ki\u1ec3m so\u00e1t th\u1ea5m n\u01b0\u1edbc<\/span><\/strong><\/h3>\n

\u00c1p d\u1ee5ng cho: N\u1ee9t co ng\u00f3t kh\u00f4 v\u1eeba, n\u1ee9t l\u00fan d\u1ebbo, n\u1ee9t nhi\u1ec7t nh\u1eb9<\/span><\/strong>
\n\u2022 C\u1eaft r\u00e3nh d\u1ecdc v\u1ebft n\u1ee9t (ch\u1eef V ho\u1eb7c ch\u1eef U) s\u00e2u 10 – 15 mm<\/span>
\n\u2022 Tr\u00e1m b\u1eb1ng keo polyurethane linh ho\u1ea1t ho\u1eb7c v\u1eefa kh\u00f4ng co ng\u00f3t<\/span>
\n\u2022 B\u1ed5 sung khe co gi\u00e3n n\u1ebfu thi\u1ebfu<\/span>
\n\u2022 T\u0103ng c\u01b0\u1eddng ch\u1ed1ng th\u1ea5m cho v\u00f9ng xung quanh<\/span><\/p>\n

Nh\u00f3m 3 – N\u1ee9t \u0103n m\u00f2n c\u1ed1t th\u00e9p, c\u1ea7n can thi\u1ec7p k\u1ef9 thu\u1eadt<\/span><\/strong><\/h3>\n

\u00c1p d\u1ee5ng cho: N\u1ee9t do \u0103n m\u00f2n c\u1ed1t th\u00e9p, n\u1ee9t ph\u1ea3n \u1ee9ng ki\u1ec1m-silic<\/span><\/strong>
\n\u2022 \u0110\u1ee5c b\u1ecf to\u00e0n b\u1ed9 ph\u1ea7n b\u00ea t\u00f4ng h\u1ecfng, bong tr\u00f3c<\/span>
\n\u2022 L\u00e0m s\u1ea1ch c\u1ed1t th\u00e9p b\u1eb1ng b\u00e0n ch\u1ea3i th\u00e9p ho\u1eb7c phun c\u00e1t<\/span>
\n\u2022 Ph\u1ee7 l\u1edbp ch\u1ed1ng g\u1ec9 chuy\u00ean d\u1ee5ng cho c\u1ed1t th\u00e9p<\/span>
\n\u2022 Tr\u00e1m l\u1ea1i b\u1eb1ng v\u1eefa s\u1eeda ch\u1eefa co ng\u00f3t th\u1ea5p, c\u01b0\u1eddng \u0111\u1ed9 cao<\/span>
\n\u2022 Ph\u1ee7 l\u1edbp ch\u1ed1ng th\u1ea5m, ch\u1ed1ng carbonat h\u00f3a to\u00e0n b\u1ed9 b\u1ec1 m\u1eb7t<\/span><\/p>\n

Nh\u00f3m 4 – N\u1ee9t k\u1ebft c\u1ea5u, qu\u00e1 t\u1ea3i – b\u1eaft bu\u1ed9c c\u00f3 k\u1ef9 s\u01b0<\/span><\/strong><\/h3>\n

\u00c1p d\u1ee5ng cho: N\u1ee9t k\u1ebft c\u1ea5u, n\u1ee9t qu\u00e1 t\u1ea3i, n\u1ee9t nhi\u1ec7t s\u00e2u<\/span><\/strong>
\n\u2022 Ph\u01b0\u01a1ng \u00e1n th\u01b0\u1eddng d\u00f9ng: D\u00e1n s\u1ee3i carbon FRP, b\u1ed5 sung th\u00e9p h\u00ecnh, gia c\u01b0\u1eddng b\u1ea3n th\u00e9p neo bulong<\/span>
\n\u2022 Trong khi ch\u1edd thi c\u00f4ng: H\u1ea1n ch\u1ebf t\u1ea3i tr\u1ecdng t\u1ea1i v\u1ecb tr\u00ed n\u1ee9t<\/span>
\n\u2022 Theo d\u00f5i v\u1ebft n\u1ee9t b\u1eb1ng th\u01b0\u1edbc \u0111o v\u1ebft n\u1ee9t (crack gauge) \u0111\u1ec3 ki\u1ec3m so\u00e1t ti\u1ebfn tri\u1ec3n<\/span><\/p>\n

Khi n\u00e0o c\u1ea7n g\u1ecdi k\u1ef9 s\u01b0 k\u1ebft c\u1ea5u?<\/span><\/strong><\/h2>\n

D\u01b0\u1edbi \u0111\u00e2y l\u00e0 danh s\u00e1ch c\u00e1c d\u1ea5u hi\u1ec7u b\u1ea1n kh\u00f4ng n\u00ean ch\u1edd \u0111\u1ee3i hay t\u1ef1 x\u1eed l\u00fd khi ph\u00e1t hi\u1ec7n b\u00ea t\u00f4ng b\u1ecb n\u1ee9t:<\/span><\/p>\n

\u2022 V\u1ebft n\u1ee9t xu\u1ea5t hi\u1ec7n tr\u00ean c\u1ed9t, d\u1ea7m, m\u00f3ng – d\u00f9 nh\u1ecf<\/span>
\n\u2022 V\u1ebft n\u1ee9t k\u00e8m ti\u1ebfng n\u1ed5 l\u00e1ch t\u00e1ch ho\u1eb7c \u00e2m thanh b\u1ea5t th\u01b0\u1eddng<\/span>
\n\u2022 S\u00e0n, d\u1ea7m b\u1ecb v\u00f5ng nh\u00ecn th\u1ea5y b\u1eb1ng m\u1eaft th\u01b0\u1eddng<\/span>
\n\u2022 C\u1eeda, c\u1eeda s\u1ed5 b\u1ed7ng nhi\u00ean k\u1eb9t, kh\u00f3 m\u1edf<\/span>
\n\u2022 V\u1ebft n\u1ee9t ti\u1ebfp t\u1ee5c r\u1ed9ng\/d\u00e0i th\u00eam sau khi tr\u00e1m<\/span>
\n\u2022 C\u00f3 nhi\u1ec1u v\u1ebft n\u1ee9t xu\u1ea5t hi\u1ec7n c\u00f9ng l\u00fac \u1edf nhi\u1ec1u v\u1ecb tr\u00ed<\/span>
\n\u2022 C\u00f4ng tr\u00ecnh v\u1eeba qua s\u1ef1 c\u1ed1: ng\u1eadp n\u01b0\u1edbc, \u0111\u1ed9ng \u0111\u1ea5t, va ch\u1ea1m m\u1ea1nh<\/span>
\n\u2022 C\u00f4ng tr\u00ecnh \u0111\u00e3 qua 25 – 30 n\u0103m s\u1eed d\u1ee5ng, ch\u01b0a ki\u1ec3m \u0111\u1ecbnh l\u1ea7n n\u00e0o<\/span><\/p>\n

Ph\u1ea7n l\u1edbn b\u00ea t\u00f4ng b\u1ecb n\u1ee9t \u0111\u1ec1u c\u00f3 th\u1ec3 ph\u00f2ng ng\u1eeba \u0111\u01b0\u1ee3c, n\u1ebfu v\u1eadt li\u1ec7u \u0111\u1ea1t chu\u1ea9n, t\u1ef7 l\u1ec7 ph\u1ed1i tr\u1ed9n b\u00ea t\u00f4ng \u0111\u00fang v\u00e0 quy tr\u00ecnh thi c\u00f4ng \u0111\u01b0\u1ee3c ki\u1ec3m so\u00e1t ch\u1eb7t ngay t\u1eeb \u0111\u1ea7u.<\/span><\/p>\n

N\u1ebfu c\u00f4ng tr\u00ecnh c\u1ee7a b\u1ea1n \u0111ang trong giai \u0111o\u1ea1n chu\u1ea9n b\u1ecb thi c\u00f4ng, \u0111\u00e2y l\u00e0 th\u1eddi \u0111i\u1ec3m t\u1ed1t nh\u1ea5t \u0111\u1ec3 ph\u00f2ng ng\u1eeba, kh\u00f4ng ph\u1ea3i sau khi v\u1ebft n\u1ee9t \u0111\u00e3 xu\u1ea5t hi\u1ec7n. Dufago cung c\u1ea5p d\u1ecbch v\u1ee5 \u0111\u1ed5 b\u00ea t\u00f4ng t\u01b0\u01a1i tr\u1ecdn g\u00f3i v\u1edbi b\u00ea t\u00f4ng tr\u1ea1m tr\u1ed9n \u0111\u1ea1t chu\u1ea9n v\u00e0 nh\u1eefng y\u1ebfu t\u1ed1 tr\u1ef1c ti\u1ebfp ng\u0103n ng\u1eeba c\u00e1c lo\u1ea1i n\u1ee9t s\u1edbm ph\u1ed5 bi\u1ebfn nh\u1ea5t.<\/span><\/p>\n

Refer d\u1ecbch v\u1ee5 \u0111\u1ed5 b\u00ea t\u00f4ng t\u01b0\u01a1i c\u1ee7a Dufago<\/strong>, ho\u1eb7c g\u1ecdi \u0111\u1ec3 \u0111\u01b0\u1ee3c t\u01b0 v\u1ea5n ph\u1ed1i tr\u1ed9n ph\u00f9 h\u1ee3p v\u1edbi c\u00f4ng tr\u00ecnh c\u1ee7a b\u1ea1n.<\/span><\/p>\n