{"id":10622,"date":"2026-09-09T11:33:36","date_gmt":"2026-09-09T04:33:36","guid":{"rendered":"https:\/\/pcecatlam.vn\/?p=10622"},"modified":"2026-09-09T14:02:05","modified_gmt":"2026-09-09T07:02:05","slug":"nascn-tang-cuong-do-som-cho-be-tong","status":"publish","type":"post","link":"https:\/\/pcecatlam.vn\/km\/nascn-tang-cuong-do-som-cho-be-tong\/","title":{"rendered":"NaSCN – Gi\u1ea3i Ph\u00e1p T\u0103ng C\u01b0\u1eddng \u0110\u1ed9 S\u1edbm Cho B\u00ea T\u00f4ng Kh\u00f4ng Ch\u1ee9a Clorua"},"content":{"rendered":"

NaSCN – Gi\u1ea3i Ph\u00e1p T\u0103ng C\u01b0\u1eddng \u0110\u1ed9 S\u1edbm Cho B\u00ea T\u00f4ng Kh\u00f4ng Ch\u1ee9a Clorua<\/strong><\/p>\n\n\n\n

Trong s\u1ea3n xu\u1ea5t c\u1ea5u ki\u1ec7n \u0111\u00fac s\u1eb5n v\u00e0 thi c\u00f4ng b\u00ea t\u00f4ng ti\u1ebfn \u0111\u1ed9 cao, c\u01b0\u1eddng \u0111\u1ed9 s\u1edbm<\/strong> l\u00e0 y\u1ebfu t\u1ed1 quy\u1ebft \u0111\u1ecbnh t\u1ed1c \u0111\u1ed9 lu\u00e2n chuy\u1ec3n v\u00e1n khu\u00f4n v\u00e0 n\u0103ng su\u1ea5t nh\u00e0 m\u00e1y. NaSCN (natri thiocyanat, sodium thiocyanate)<\/strong> l\u00e0 m\u1ed9t trong nh\u1eefng th\u00e0nh ph\u1ea7n t\u0103ng c\u01b0\u1eddng \u0111\u1ed9 s\u1edbm hi\u1ec7u qu\u1ea3 nh\u1ea5t hi\u1ec7n nay: ch\u1ec9 v\u1edbi li\u1ec1u d\u00f9ng 0,05 \u2013 0,12% kh\u1ed1i l\u01b0\u1ee3ng xi m\u0103ng, NaSCN c\u00f3 th\u1ec3 n\u00e2ng c\u01b0\u1eddng \u0111\u1ed9 n\u00e9n 1 ng\u00e0y c\u1ee7a b\u00ea t\u00f4ng l\u00ean h\u01a1n 80% so v\u1edbi m\u1eabu \u0111\u1ed1i ch\u1ee9ng, \u0111\u1ed3ng th\u1eddi kh\u00f4ng ch\u1ee9a ion clorua n\u00ean kh\u00f4ng g\u00e2y r\u1ee7i ro \u0103n m\u00f2n c\u1ed1t th\u00e9p.<\/p>\n\n\n\n

B\u00e0i vi\u1ebft d\u01b0\u1edbi \u0111\u00e2y tr\u00ecnh b\u00e0y b\u1ea3n ch\u1ea5t, c\u01a1 ch\u1ebf t\u00e1c d\u1ee5ng, s\u1ed1 li\u1ec7u th\u1ef1c nghi\u1ec7m, li\u1ec1u d\u00f9ng v\u00e0 c\u00e1c l\u01b0u \u00fd khi \u0111\u01b0a NaSCN v\u00e0o c\u00f4ng th\u1ee9c ph\u1ee5 gia b\u00ea t\u00f4ng.<\/p>\n\n\n\n

\"\"
NaSCN t\u0103ng c\u01b0\u1eddng \u0111\u1ed9 s\u1edbm cho b\u00ea t\u00f4ng \u0111\u00fac s\u1eb5n<\/figcaption><\/figure>\n\n\n\n

NaSCN l\u00e0 g\u00ec?<\/strong><\/p>\n\n\n\n

NaSCN l\u00e0 c\u00f4ng th\u1ee9c h\u00f3a h\u1ecdc c\u1ee7a natri thiocyanat<\/strong> \u2013 mu\u1ed1i natri c\u1ee7a axit thiocyanic, t\u1ed3n t\u1ea1i \u1edf d\u1ea1ng tinh th\u1ec3 tr\u1eafng h\u00fat \u1ea9m ho\u1eb7c d\u1ea1ng dung d\u1ecbch n\u01b0\u1edbc n\u1ed3ng \u0111\u1ed9 50 \u2013 55%. \u0110\u1eb7c \u0111i\u1ec3m n\u1ed5i b\u1eadt c\u1ee7a NaSCN trong l\u0129nh v\u1ef1c v\u1eadt li\u1ec7u x\u00e2y d\u1ef1ng:<\/p>\n\n\n\n

    \n
  • \u0110\u1ed9 h\u00f2a tan trong n\u01b0\u1edbc r\u1ea5t cao<\/strong>, thu\u1eadn l\u1ee3i cho vi\u1ec7c pha ch\u1ebf ph\u1ee5 gia d\u1ea1ng l\u1ecfng n\u1ed3ng \u0111\u1ed9 cao m\u00e0 kh\u00f4ng b\u1ecb k\u1ebft tinh, l\u1eafng \u0111\u1ecdng.<\/li>\n\n\n\n
  • Kh\u00f4ng ch\u1ee9a ion clorua (Cl\u207b) v\u00e0 kh\u00f4ng ch\u1ee9a g\u1ed1c sulfat (SO\u2084\u00b2\u207b)<\/strong> \u2013 hai t\u00e1c nh\u00e2n g\u00e2y \u0103n m\u00f2n c\u1ed1t th\u00e9p v\u00e0 x\u00e2m th\u1ef1c sulfat trong b\u00ea t\u00f4ng.<\/li>\n\n\n\n
  • L\u00e0 t\u00e1c nh\u00e2n t\u1ea1o ph\u1ee9c ion s\u1eaft m\u1ea1nh<\/strong>, \u0111\u00e2y ch\u00ednh l\u00e0 c\u01a1 s\u1edf cho hi\u1ec7u qu\u1ea3 t\u0103ng c\u01b0\u1eddng \u0111\u1ed9 c\u1ee7a n\u00f3.<\/li>\n<\/ul>\n\n\n\n

    Trong ng\u00e0nh xi m\u0103ng \u2013 b\u00ea t\u00f4ng, NaSCN \u0111\u01b0\u1ee3c d\u00f9ng theo hai h\u01b0\u1edbng: l\u00e0m th\u00e0nh ph\u1ea7n t\u0103ng c\u01b0\u1eddng \u0111\u1ed9 s\u1edbm trong ph\u1ee5 gia b\u00ea t\u00f4ng<\/strong> v\u00e0 l\u00e0m th\u00e0nh ph\u1ea7n t\u0103ng c\u01b0\u1eddng trong ph\u1ee5 gia tr\u1ee3 nghi\u1ec1n xi m\u0103ng<\/strong>.<\/p>\n\n\n\n

    V\u00ec sao c\u01b0\u1eddng \u0111\u1ed9 s\u1edbm l\u1ea1i quan tr\u1ecdng?<\/strong><\/p>\n\n\n\n

    C\u01b0\u1eddng \u0111\u1ed9 s\u1edbm (c\u01b0\u1eddng \u0111\u1ed9 tu\u1ed5i 1 \u2013 3 ng\u00e0y) \u1ea3nh h\u01b0\u1edfng tr\u1ef1c ti\u1ebfp \u0111\u1ebfn chi ph\u00ed s\u1ea3n xu\u1ea5t:<\/p>\n\n\n\n

      \n
    • Nh\u00e0 m\u00e1y c\u1ea5u ki\u1ec7n \u0111\u00fac s\u1eb5n:<\/strong> c\u01b0\u1eddng \u0111\u1ed9 1 ng\u00e0y cao cho ph\u00e9p th\u00e1o v\u00e1n khu\u00f4n s\u1edbm, r\u00fat ng\u1eafn chu k\u1ef3 lu\u00e2n chuy\u1ec3n khu\u00f4n t\u1eeb 2 ng\u00e0y xu\u1ed1ng 1 ng\u00e0y, t\u0103ng g\u1ea7n g\u1ea5p \u0111\u00f4i s\u1ea3n l\u01b0\u1ee3ng tr\u00ean c\u00f9ng b\u1ed9 khu\u00f4n.<\/li>\n\n\n\n
    • C\u1ea5u ki\u1ec7n d\u1ef1 \u1ee9ng l\u1ef1c:<\/strong> c\u1ea7n \u0111\u1ea1t c\u01b0\u1eddng \u0111\u1ed9 c\u1eaft c\u00e1p c\u00e0ng nhanh c\u00e0ng t\u1ed1t \u0111\u1ec3 gi\u1ea3i ph\u00f3ng b\u1ec7 c\u0103ng.<\/li>\n\n\n\n
    • B\u00ea t\u00f4ng th\u01b0\u01a1ng ph\u1ea9m thi c\u00f4ng g\u1ea5p:<\/strong> r\u00fat ng\u1eafn th\u1eddi gian ch\u1edd tr\u01b0\u1edbc khi ch\u1ea5t t\u1ea3i, thi c\u00f4ng t\u1ea7ng ti\u1ebfp theo.<\/li>\n\n\n\n
    • Thi c\u00f4ng trong \u0111i\u1ec1u ki\u1ec7n nhi\u1ec7t \u0111\u1ed9 th\u1ea5p:<\/strong> v\u00e0o m\u00f9a \u0111\u00f4ng \u1edf mi\u1ec1n B\u1eafc v\u00e0 v\u00f9ng n\u00fai cao, ph\u1ea3n \u1ee9ng th\u1ee7y h\u00f3a ch\u1eadm l\u1ea1i r\u00f5 r\u1ec7t, c\u01b0\u1eddng \u0111\u1ed9 s\u1edbm ph\u00e1t tri\u1ec3n k\u00e9m, l\u00e0m ch\u1eadm to\u00e0n b\u1ed9 ti\u1ebfn \u0111\u1ed9.<\/li>\n\n\n\n
    • Gi\u1ea3m ho\u1eb7c b\u1ecf d\u01b0\u1ee1ng h\u1ed9 nhi\u1ec7t:<\/strong> m\u1ed9t ph\u1ea7n chi ph\u00ed h\u01a1i n\u01b0\u1edbc, \u0111i\u1ec7n n\u0103ng v\u00e0 kh\u00ed \u0111\u1ed1t c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c ti\u1ebft gi\u1ea3m khi c\u01b0\u1eddng \u0111\u1ed9 s\u1edbm \u0111\u01b0\u1ee3c c\u1ea3i thi\u1ec7n b\u1eb1ng ph\u1ee5 gia h\u00f3a h\u1ecdc.<\/li>\n<\/ul>\n\n\n\n
      \"\"\/<\/figure>\n\n\n\n

      C\u01a1 ch\u1ebf t\u0103ng c\u01b0\u1eddng \u0111\u1ed9 s\u1edbm c\u1ee7a NaSCN<\/strong><\/p>\n\n\n\n

      Hi\u1ec7u qu\u1ea3 c\u1ee7a NaSCN kh\u00f4ng \u0111\u1ebfn t\u1eeb vi\u1ec7c “th\u00eam ch\u1ea5t \u0111\u00f3ng r\u1eafn” m\u00e0 \u0111\u1ebfn t\u1eeb hi\u1ec7u \u1ee9ng t\u1ea1o ph\u1ee9c \u2013 tr\u1ee3 tan<\/strong> \u0111\u1ed1i v\u1edbi c\u00e1c ion kim lo\u1ea1i trong pha l\u1ecfng c\u1ee7a h\u1ed3 xi m\u0103ng.<\/p>\n\n\n\n

      T\u1ea1o ph\u1ee9c v\u1edbi ion Fe\u00b3\u207a v\u00e0 Ca\u00b2\u207a<\/strong><\/p>\n\n\n\n

      Ion thiocyanat (SCN\u207b) t\u1ea1o ph\u1ee9c tan v\u1edbi c\u00e1c ion kim lo\u1ea1i trong pha l\u1ecfng, \u0111i\u1ec3n h\u00ecnh l\u00e0 ph\u1ea3n \u1ee9ng ph\u1ed1i tr\u00ed v\u1edbi Fe\u00b3\u207a t\u1ea1o th\u00e0nh c\u00e1c ph\u1ee9c b\u1ec1n [Fe(SCN)\u2099]\u207d\u00b3\u207b\u207f\u207e\u207a v\u1edbi n = 1 \u2013 6. N\u1ed3ng \u0111\u1ed9 ion kim lo\u1ea1i t\u1ef1 do trong dung d\u1ecbch gi\u1ea3m xu\u1ed1ng, c\u00e2n b\u1eb1ng r\u1eafn \u2013 l\u1ecfng b\u1ecb ph\u00e1 v\u1ee1, bu\u1ed9c c\u00e1c kho\u00e1ng ch\u01b0a th\u1ee7y h\u00f3a \u2013 \u0111\u1eb7c bi\u1ec7t l\u00e0 pha ferrit (C\u2084AF)<\/strong> \u2013 ti\u1ebfp t\u1ee5c h\u00f2a tan v\u00e0 gi\u1ea3i ph\u00f3ng c\u00e1c c\u1ea5u t\u1eed ho\u1ea1t t\u00ednh.<\/p>\n\n\n\n

      K\u1ebft qu\u1ea3 tr\u00ean vi c\u1ea5u tr\u00fac<\/strong><\/p>\n\n\n\n

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      • Qu\u00e1 tr\u00ecnh th\u1ee7y h\u00f3a di\u1ec5n ra nhanh h\u01a1n ngay t\u1eeb nh\u1eefng gi\u1edd \u0111\u1ea7u.<\/li>\n\n\n\n
      • S\u1ea3n ph\u1ea9m th\u1ee7y h\u00f3a h\u00ecnh th\u00e0nh s\u1edbm v\u00e0 nhi\u1ec1u h\u01a1n, vi c\u1ea5u tr\u00fac \u0111\u00e1 xi m\u0103ng \u0111\u1eb7c ch\u1eafc h\u01a1n.<\/li>\n\n\n\n
      • C\u01b0\u1eddng \u0111\u1ed9 s\u1edbm t\u0103ng m\u1ea1nh, \u0111\u1ed3ng th\u1eddi c\u01b0\u1eddng \u0111\u1ed9 d\u00e0i ng\u00e0y (28 ng\u00e0y) v\u1eabn ti\u1ebfp t\u1ee5c ph\u00e1t tri\u1ec3n ch\u1ee9 kh\u00f4ng b\u1ecb h\u1ee5t nh\u01b0 khi d\u00f9ng m\u1ed9t s\u1ed1 ph\u1ee5 gia \u0111\u00f3ng r\u1eafn nhanh kh\u00e1c<\/strong>.<\/li>\n<\/ul>\n\n\n\n

        C\u01a1 ch\u1ebf ch\u1ed1ng \u0111\u00f4ng k\u00e8m theo<\/strong><\/p>\n\n\n\n

        Ion Na\u207a v\u00e0 SCN\u207b ph\u00e1 v\u1ee1 tr\u1eadt t\u1ef1 li\u00ean k\u1ebft hydro c\u1ee7a n\u01b0\u1edbc v\u00e0 gi\u1eef n\u01b0\u1edbc t\u1ef1 do trong l\u1edbp v\u1ecf hydrat h\u00f3a, l\u00e0m h\u1ea1 \u0111i\u1ec3m \u0111\u00f3ng b\u0103ng v\u00e0 gi\u1ea3m l\u01b0\u1ee3ng n\u01b0\u1edbc c\u00f3 th\u1ec3 k\u1ebft tinh th\u00e0nh \u0111\u00e1. Nh\u1edd v\u1eady, b\u00ea t\u00f4ng nhanh \u0111\u1ea1t c\u01b0\u1eddng \u0111\u1ed9 t\u1edbi h\u1ea1n ch\u1ed1ng \u0111\u00f3ng b\u0103ng<\/strong> \u2013 y\u1ebfu t\u1ed1 then ch\u1ed1t khi \u0111\u1ed5 b\u00ea t\u00f4ng \u1edf nhi\u1ec7t \u0111\u1ed9 th\u1ea5p.<\/p>\n\n\n\n

        S\u1ed1 li\u1ec7u th\u1ef1c nghi\u1ec7m<\/strong><\/p>\n\n\n\n

        B\u00ea t\u00f4ng C30, d\u01b0\u1ee1ng h\u1ed9 \u1edf 5 \u00b0C<\/strong><\/p>\n\n\n\n

        C\u1ea5p ph\u1ed1i C30 (kg\/m\u00b3): n\u01b0\u1edbc 165 \u2013 xi m\u0103ng 230 \u2013 b\u1ed9t kho\u00e1ng 100 \u2013 tro bay 40 \u2013 c\u00e1t nghi\u1ec1n 720 \u2013 c\u00e1t s\u00f4ng 200 \u2013 \u0111\u00e1 d\u0103m 950 \u2013 ph\u1ee5 gia 7,4.<\/p>\n\n\n\n

        Hai c\u00f4ng th\u1ee9c ph\u1ee5 gia \u0111\u01b0\u1ee3c so s\u00e1nh \u1edf c\u00f9ng li\u1ec1u d\u00f9ng 2% (theo kh\u1ed1i l\u01b0\u1ee3ng xi m\u0103ng):<\/p>\n\n\n\n

          \n
        • Ph\u1ee5 gia \u0111\u1ed1i ch\u1ee9ng:<\/strong> ph\u1ee5 gia gi\u1ea3m n\u01b0\u1edbc polycarboxylate 10%, th\u00e0nh ph\u1ea7n kh\u00e1c 7%, n\u01b0\u1edbc 83%.<\/li>\n\n\n\n
        • Ph\u1ee5 gia NaSCN:<\/strong> ph\u1ee5 gia gi\u1ea3m n\u01b0\u1edbc polycarboxylate 10%, natri thiocyanat 5%<\/strong>, th\u00e0nh ph\u1ea7n kh\u00e1c 7%, n\u01b0\u1edbc 78%.<\/li>\n<\/ul>\n\n\n\n
          C\u01b0\u1eddng \u0111\u1ed9 n\u00e9n (MPa)<\/strong><\/td>1 ng\u00e0y<\/strong><\/td>3 ng\u00e0y<\/strong><\/td>7 ng\u00e0y<\/strong><\/td>28 ng\u00e0y<\/strong><\/td><\/tr><\/thead>
          Ph\u1ee5 gia \u0111\u1ed1i ch\u1ee9ng<\/td>2,8<\/td>12,3<\/td>20,7<\/td>28,4<\/td><\/tr>
          Ph\u1ee5 gia NaSCN<\/td>5,9<\/strong><\/td>16,0<\/strong><\/td>24,9<\/strong><\/td>31,2<\/strong><\/td><\/tr>
          M\u1ee9c t\u0103ng<\/td>+111%<\/td>+30%<\/td>+20%<\/td>+10%<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

          \u0110i\u1ec3m \u0111\u00e1ng ch\u00fa \u00fd: c\u01b0\u1eddng \u0111\u1ed9 1 ng\u00e0y t\u0103ng h\u01a1n g\u1ea5p \u0111\u00f4i trong khi c\u01b0\u1eddng \u0111\u1ed9 28 ng\u00e0y v\u1eabn cao h\u01a1n m\u1eabu \u0111\u1ed1i ch\u1ee9ng g\u1ea7n 10%.<\/p>\n\n\n\n

          B\u00ea t\u00f4ng C35 \u1edf \u22125 \u00b0C v\u00e0 20 \u00b0C<\/strong><\/p>\n\n\n\n

          Th\u1eed nghi\u1ec7m theo ti\u00eau chu\u1ea9n GB\/T 50081, c\u1ea5p ph\u1ed1i (kg\/m\u00b3): xi m\u0103ng 340 \u2013 tro bay 114 \u2013 c\u00e1t 775 \u2013 \u0111\u00e1 d\u0103m 1030 \u2013 n\u01b0\u1edbc 162, v\u1edbi th\u00e0nh ph\u1ea7n t\u0103ng c\u01b0\u1eddng g\u1ed1c NaSCN chi\u1ebfm 2,0% trong c\u00f4ng th\u1ee9c ph\u1ee5 gia:<\/p>\n\n\n\n

          \u0110i\u1ec1u ki\u1ec7n<\/strong><\/td>T\u1ef7 l\u1ec7 c\u01b0\u1eddng \u0111\u1ed9 1 ng\u00e0y<\/strong><\/td>3 ng\u00e0y<\/strong><\/td>28 ng\u00e0y<\/strong><\/td><\/tr><\/thead>
          \u22125 \u00b0C<\/td>185%<\/td>168%<\/td>120%<\/td><\/tr>
          20 \u00b0C<\/td>147%<\/td>135%<\/td>118%<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

          Ngo\u00e0i ra, NaSCN kh\u00f4ng l\u00e0m thay \u0111\u1ed5i \u0111\u1ed9 s\u1ee5t ban \u0111\u1ea7u c\u0169ng nh\u01b0 t\u1ed5n th\u1ea5t \u0111\u1ed9 s\u1ee5t theo th\u1eddi gian<\/strong>, cho th\u1ea5y kh\u1ea3 n\u0103ng t\u01b0\u01a1ng th\u00edch t\u1ed1t v\u1edbi h\u1ec7 ph\u1ee5 gia gi\u1ea3m n\u01b0\u1edbc polycarboxylate.<\/p>\n\n\n\n

          C\u00e1c s\u1ed1 li\u1ec7u tr\u00ean tr\u00edch t\u1eeb t\u00e0i li\u1ec7u k\u1ef9 thu\u1eadt v\u00e0 b\u00e1o c\u00e1o th\u1eed nghi\u1ec7m c\u1ee7a nh\u00e0 s\u1ea3n xu\u1ea5t. Hi\u1ec7u qu\u1ea3 th\u1ef1c t\u1ebf ph\u1ee5 thu\u1ed9c v\u00e0o lo\u1ea1i xi m\u0103ng, ph\u1ee5 gia kho\u00e1ng, c\u1ea5p ph\u1ed1i v\u00e0 \u0111i\u1ec1u ki\u1ec7n thi c\u00f4ng c\u1ee5 th\u1ec3, do \u0111\u00f3 c\u1ea7n th\u1eed nghi\u1ec7m t\u1ea1i ph\u00f2ng th\u00ed nghi\u1ec7m tr\u01b0\u1edbc khi \u00e1p d\u1ee5ng \u0111\u1ea1i tr\u00e0.<\/em><\/p>\n\n\n\n

          So s\u00e1nh NaSCN v\u1edbi c\u00e1c ph\u1ee5 gia t\u0103ng c\u01b0\u1eddng \u0111\u1ed9 s\u1edbm kh\u00e1c<\/strong><\/p>\n\n\n\n

          Th\u00e0nh ph\u1ea7n<\/strong><\/td>\u01afu \u0111i\u1ec3m<\/strong><\/td>H\u1ea1n ch\u1ebf<\/strong><\/td><\/tr><\/thead>
          NaSCN<\/strong><\/td>Hi\u1ec7u qu\u1ea3 cao \u1edf li\u1ec1u th\u1ea5p; kh\u00f4ng Cl\u207b, kh\u00f4ng sulfat; \u0111\u1ed9 h\u00f2a tan cao; t\u01b0\u01a1ng th\u00edch t\u1ed1t v\u1edbi polycarboxylate v\u00e0 alkanolamin; c\u00f3 t\u00e1c d\u1ee5ng ch\u1ed1ng \u0111\u00f4ng<\/td>Gi\u00e1 th\u00e0nh cao h\u01a1n mu\u1ed1i v\u00f4 c\u01a1 th\u00f4ng th\u01b0\u1eddng; c\u1ea7n ki\u1ec3m so\u00e1t an to\u00e0n khi pha ch\u1ebf<\/td><\/tr>
          Canxi clorua (CaCl\u2082)<\/strong><\/td>R\u1ebb, hi\u1ec7u qu\u1ea3 \u0111\u00f3ng r\u1eafn nhanh m\u1ea1nh<\/td>Ch\u1ee9a Cl\u207b g\u00e2y \u0103n m\u00f2n c\u1ed1t th\u00e9p; b\u1ecb h\u1ea1n ch\u1ebf ho\u1eb7c c\u1ea5m trong b\u00ea t\u00f4ng c\u1ed1t th\u00e9p v\u00e0 b\u00ea t\u00f4ng d\u1ef1 \u1ee9ng l\u1ef1c<\/td><\/tr>
          Natri sulfat (Na\u2082SO\u2084)<\/strong><\/td>R\u1ebb, t\u0103ng c\u01b0\u1eddng \u0111\u1ed9 s\u1edbm kh\u00e1 t\u1ed1t<\/td>\u0110\u01b0a th\u00eam g\u1ed1c sulfat, nguy c\u01a1 x\u00e2m th\u1ef1c sulfat v\u00e0 suy gi\u1ea3m c\u01b0\u1eddng \u0111\u1ed9 d\u00e0i ng\u00e0y; \u0111\u1ed9 h\u00f2a tan th\u1ea5p, d\u1ec5 k\u1ebft tinh trong ph\u1ee5 gia l\u1ecfng<\/td><\/tr>
          Canxi format<\/strong><\/td>Kh\u00f4ng ch\u1ee9a clorua<\/td>C\u1ea7n li\u1ec1u d\u00f9ng cao h\u01a1n nhi\u1ec1u; \u0111\u1ed9 h\u00f2a tan h\u1ea1n ch\u1ebf<\/td><\/tr>
          Alkanolamin (TEA, TIPA, DEIPA)<\/strong><\/td>C\u1ea3i thi\u1ec7n c\u01b0\u1eddng \u0111\u1ed9, \u0111\u1eb7c bi\u1ec7t \u1edf tu\u1ed5i d\u00e0i ng\u00e0y<\/td>Hi\u1ec7u qu\u1ea3 c\u01b0\u1eddng \u0111\u1ed9 1 ng\u00e0y k\u00e9m h\u01a1n; d\u1ec5 g\u00e2y ch\u1eadm \u0111\u00f4ng k\u1ebft n\u1ebfu qu\u00e1 li\u1ec1u<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

          Tr\u00ean th\u1ef1c t\u1ebf, NaSCN th\u01b0\u1eddng kh\u00f4ng d\u00f9ng \u0111\u01a1n l\u1ebb<\/strong> m\u00e0 ph\u1ed1i h\u1ee3p v\u1edbi DEIPA ho\u1eb7c c\u00e1c alkanolamin kh\u00e1c. Hai nh\u00f3m n\u00e0y t\u00e1c \u0111\u1ed9ng l\u00ean c\u00e1c pha kho\u00e1ng kh\u00e1c nhau v\u00e0 t\u1ea1o hi\u1ec7u \u1ee9ng hi\u1ec7p \u0111\u1ed3ng: k\u1ebft qu\u1ea3 t\u1ed5ng th\u1ec3 t\u1ed1t h\u01a1n t\u1ed5ng hi\u1ec7u qu\u1ea3 ri\u00eang l\u1ebb c\u1ee7a t\u1eebng th\u00e0nh ph\u1ea7n.<\/p>\n\n\n\n

          \u1ee8ng d\u1ee5ng \u0111i\u1ec3n h\u00ecnh<\/strong><\/p>\n\n\n\n

            \n
          • C\u1ea5u ki\u1ec7n b\u00ea t\u00f4ng \u0111\u00fac s\u1eb5n:<\/strong> c\u1ecdc, d\u1ea7m, panel, \u1ed1ng c\u1ed1ng, g\u1ea1ch block \u2013 n\u01a1i c\u1ea7n th\u00e1o khu\u00f4n nhanh v\u00e0 t\u0103ng v\u00f2ng quay khu\u00f4n.<\/li>\n\n\n\n
          • B\u00ea t\u00f4ng d\u1ef1 \u1ee9ng l\u1ef1c:<\/strong> r\u00fat ng\u1eafn th\u1eddi gian \u0111\u1ea1t c\u01b0\u1eddng \u0111\u1ed9 c\u1eaft c\u00e1p.<\/li>\n\n\n\n
          • B\u00ea t\u00f4ng thi c\u00f4ng m\u00f9a l\u1ea1nh:<\/strong> d\u1ef1 \u00e1n \u1edf mi\u1ec1n B\u1eafc, v\u00f9ng n\u00fai cao v\u00e0o m\u00f9a \u0111\u00f4ng.<\/li>\n\n\n\n
          • Ph\u1ee5 gia \u0111\u00f4ng k\u1ebft nhanh cho b\u00ea t\u00f4ng phun (shotcrete):<\/strong> d\u00f9ng l\u00e0m m\u1ed9t th\u00e0nh ph\u1ea7n trong c\u00f4ng th\u1ee9c.<\/li>\n\n\n\n
          • Ph\u1ee5 gia tr\u1ee3 nghi\u1ec1n xi m\u0103ng:<\/strong> thay th\u1ebf NaCl v\u00e0 Na\u2082SO\u2084 trong c\u00f4ng th\u1ee9c tr\u1ee3 nghi\u1ec1n, gi\u00fap gi\u1ea3m t\u1ef7 l\u1ec7 clinker v\u00e0 t\u0103ng t\u1ef7 l\u1ec7 ph\u1ee5 gia kho\u00e1ng m\u00e0 v\u1eabn gi\u1eef \u0111\u01b0\u1ee3c c\u01b0\u1eddng \u0111\u1ed9.<\/li>\n<\/ul>\n\n\n\n

            L\u01b0u \u00fd an to\u00e0n v\u00e0 ti\u00eau chu\u1ea9n<\/strong><\/p>\n\n\n\n

            NaSCN l\u00e0 h\u00f3a ch\u1ea5t c\u00f4ng nghi\u1ec7p, \u0111\u1ed9c khi nu\u1ed1t ph\u1ea3i<\/strong>, g\u00e2y k\u00edch \u1ee9ng da v\u00e0 m\u1eaft. Khi pha ch\u1ebf c\u1ea7n trang b\u1ecb g\u0103ng tay, k\u00ednh b\u1ea3o h\u1ed9, l\u00e0m vi\u1ec7c \u1edf khu v\u1ef1c th\u00f4ng tho\u00e1ng; tuy\u1ec7t \u0111\u1ed1i tr\u00e1nh \u0111\u1ec3 ti\u1ebfp x\u00fac v\u1edbi axit m\u1ea1nh v\u00ec c\u00f3 th\u1ec3 sinh kh\u00ed \u0111\u1ed9c. C\u1ea7n tham kh\u1ea3o b\u1ea3ng d\u1eef li\u1ec7u an to\u00e0n h\u00f3a ch\u1ea5t (MSDS) c\u1ee7a nh\u00e0 s\u1ea3n xu\u1ea5t tr\u01b0\u1edbc khi s\u1eed d\u1ee5ng.<\/p>\n\n\n\n

            V\u1ec1 m\u1eb7t ti\u00eau chu\u1ea9n, ph\u1ee5 gia b\u00ea t\u00f4ng ch\u1ee9a NaSCN c\u1ea7n \u0111\u01b0\u1ee3c \u0111\u00e1nh gi\u00e1 theo TCVN 8826:2011 \u2013 Ph\u1ee5 gia h\u00f3a h\u1ecdc cho b\u00ea t\u00f4ng<\/strong> (t\u01b0\u01a1ng \u1ee9ng ASTM C494, nh\u00f3m ph\u1ee5 gia \u0111\u00f3ng r\u1eafn nhanh Type C ho\u1eb7c ph\u1ee5 gia gi\u1ea3m n\u01b0\u1edbc \u2013 \u0111\u00f3ng r\u1eafn nhanh Type E), v\u1edbi c\u01b0\u1eddng \u0111\u1ed9 n\u00e9n x\u00e1c \u0111\u1ecbnh theo TCVN 3118. M\u1ed9t s\u1ed1 ch\u1ee7 \u0111\u1ea7u t\u01b0 v\u00e0 ti\u00eau chu\u1ea9n d\u1ef1 \u00e1n c\u00f3 quy \u0111\u1ecbnh ri\u00eang v\u1ec1 h\u00e0m l\u01b0\u1ee3ng ion clorua t\u1ed1i \u0111a trong b\u00ea t\u00f4ng \u2013 \u0111\u00e2y ch\u00ednh l\u00e0 \u0111i\u1ec3m m\u00e0 NaSCN c\u00f3 l\u1ee3i th\u1ebf so v\u1edbi c\u00e1c ph\u1ee5 gia g\u1ed1c clorua.<\/p>\n\n\n\n

            C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p<\/strong><\/p>\n\n\n\n

            NaSCN c\u00f3 g\u00e2y \u0103n m\u00f2n c\u1ed1t th\u00e9p kh\u00f4ng?<\/strong> B\u1ea3n th\u00e2n NaSCN kh\u00f4ng ch\u1ee9a ion clorua v\u00e0 kh\u00f4ng ch\u1ee9a g\u1ed1c sulfat, n\u00ean kh\u00f4ng g\u00e2y ra c\u01a1 ch\u1ebf \u0103n m\u00f2n c\u1ed1t th\u00e9p nh\u01b0 canxi clorua. \u0110\u00e2y l\u00e0 l\u00fd do NaSCN \u0111\u01b0\u1ee3c l\u1ef1a ch\u1ecdn cho b\u00ea t\u00f4ng c\u1ed1t th\u00e9p v\u00e0 b\u00ea t\u00f4ng d\u1ef1 \u1ee9ng l\u1ef1c.<\/p>\n\n\n\n

            NaSCN c\u00f3 l\u00e0m gi\u1ea3m c\u01b0\u1eddng \u0111\u1ed9 28 ng\u00e0y kh\u00f4ng?<\/strong> Kh\u00f4ng. Theo s\u1ed1 li\u1ec7u th\u1eed nghi\u1ec7m, c\u01b0\u1eddng \u0111\u1ed9 28 ng\u00e0y v\u1eabn cao h\u01a1n m\u1eabu \u0111\u1ed1i ch\u1ee9ng kho\u1ea3ng 10 \u2013 20%. \u0110\u00e2y l\u00e0 kh\u00e1c bi\u1ec7t so v\u1edbi m\u1ed9t s\u1ed1 ph\u1ee5 gia \u0111\u00f3ng r\u1eafn nhanh g\u1ed1c mu\u1ed1i v\u00f4 c\u01a1 c\u00f3 th\u1ec3 g\u00e2y h\u1ee5t c\u01b0\u1eddng \u0111\u1ed9 d\u00e0i ng\u00e0y.<\/p>\n\n\n\n

            NaSCN c\u00f3 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn \u0111\u1ed9 s\u1ee5t kh\u00f4ng?<\/strong> Theo k\u1ebft qu\u1ea3 th\u1eed nghi\u1ec7m, NaSCN kh\u00f4ng l\u00e0m thay \u0111\u1ed5i \u0111\u1ed9 s\u1ee5t ban \u0111\u1ea7u v\u00e0 t\u1ed5n th\u1ea5t \u0111\u1ed9 s\u1ee5t theo th\u1eddi gian, t\u01b0\u01a1ng th\u00edch t\u1ed1t v\u1edbi ph\u1ee5 gia gi\u1ea3m n\u01b0\u1edbc g\u1ed1c polycarboxylate.<\/p>\n\n\n\n

            Li\u1ec1u d\u00f9ng NaSCN cho b\u00ea t\u00f4ng l\u00e0 bao nhi\u00eau?<\/strong> Khuy\u1ebfn ngh\u1ecb 0,05 \u2013 0,12% theo kh\u1ed1i l\u01b0\u1ee3ng xi m\u0103ng. Trong c\u00f4ng th\u1ee9c ph\u1ee5 gia l\u1ecfng d\u00f9ng \u1edf li\u1ec1u 2%, h\u00e0m l\u01b0\u1ee3ng NaSCN th\u01b0\u1eddng chi\u1ebfm 3 \u2013 6%.<\/p>\n\n\n\n

            C\u00f3 th\u1ec3 d\u00f9ng NaSCN chung v\u1edbi DEIPA kh\u00f4ng?<\/strong> C\u00f3. NaSCN v\u00e0 c\u00e1c alkanolamin nh\u01b0 DEIPA t\u1ea1o hi\u1ec7u \u1ee9ng hi\u1ec7p \u0111\u1ed3ng, cho hi\u1ec7u qu\u1ea3 t\u0103ng c\u01b0\u1eddng \u0111\u1ed9 t\u1ed1t h\u01a1n khi d\u00f9ng ri\u00eang l\u1ebb t\u1eebng th\u00e0nh ph\u1ea7n.<\/p>\n\n\n\n

            Li\u00ean h\u1ec7 t\u01b0 v\u1ea5n<\/strong><\/p>\n\n\n\n

            C\u00f4ng ty TNHH PCE C\u00e1t L\u00e2m chuy\u00ean cung c\u1ea5p h\u00f3a ch\u1ea5t ph\u1ee5 gia cho ng\u00e0nh v\u1eadt li\u1ec7u x\u00e2y d\u1ef1ng: ph\u1ee5 gia b\u00ea t\u00f4ng, ph\u1ee5 gia tr\u1ee3 nghi\u1ec1n xi m\u0103ng, polymer t\u00e1i ph\u00e2n t\u00e1n RDP, HPMC v\u00e0 nguy\u00ean li\u1ec7u v\u1eefa kh\u00f4 tr\u1ed9n s\u1eb5n. \u0110\u1ed9i ng\u0169 k\u1ef9 thu\u1eadt c\u1ee7a ch\u00fang t\u00f4i h\u1ed7 tr\u1ee3 kh\u00e1ch h\u00e0ng th\u1eed nghi\u1ec7m v\u00e0 hi\u1ec7u ch\u1ec9nh c\u00f4ng th\u1ee9c ph\u00f9 h\u1ee3p v\u1edbi t\u1eebng lo\u1ea1i xi m\u0103ng v\u00e0 \u0111i\u1ec1u ki\u1ec7n s\u1ea3n xu\u1ea5t th\u1ef1c t\u1ebf.<\/p>\n\n\n\n

            Hotline \/ Zalo:<\/strong> 0918 268 637 Email:<\/strong> pcecatlam@gmail.com Website:<\/strong> pcecatlam.vn<\/p>","protected":false},"excerpt":{"rendered":"

            NaSCN – Gi\u1ea3i Ph\u00e1p T\u0103ng C\u01b0\u1eddng \u0110\u1ed9 S\u1edbm Cho B\u00ea T\u00f4ng Kh\u00f4ng Ch\u1ee9a Clorua Trong s\u1ea3n xu\u1ea5t c\u1ea5u ki\u1ec7n \u0111\u00fac s\u1eb5n v\u00e0 thi c\u00f4ng b\u00ea t\u00f4ng ti\u1ebfn \u0111\u1ed9 cao, c\u01b0\u1eddng \u0111\u1ed9 s\u1edbm l\u00e0 y\u1ebfu t\u1ed1 quy\u1ebft \u0111\u1ecbnh t\u1ed1c \u0111\u1ed9 lu\u00e2n chuy\u1ec3n v\u00e1n khu\u00f4n v\u00e0 n\u0103ng su\u1ea5t nh\u00e0 m\u00e1y. NaSCN (natri thiocyanat, sodium thiocyanate) l\u00e0 m\u1ed9t […]<\/p>","protected":false},"author":2,"featured_media":10623,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[16],"tags":[],"yst_prominent_words":[],"acf":[],"_links":{"self":[{"href":"https:\/\/pcecatlam.vn\/km\/wp-json\/wp\/v2\/posts\/10622"}],"collection":[{"href":"https:\/\/pcecatlam.vn\/km\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/pcecatlam.vn\/km\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/pcecatlam.vn\/km\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/pcecatlam.vn\/km\/wp-json\/wp\/v2\/comments?post=10622"}],"version-history":[{"count":2,"href":"https:\/\/pcecatlam.vn\/km\/wp-json\/wp\/v2\/posts\/10622\/revisions"}],"predecessor-version":[{"id":10626,"href":"https:\/\/pcecatlam.vn\/km\/wp-json\/wp\/v2\/posts\/10622\/revisions\/10626"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/pcecatlam.vn\/km\/wp-json\/wp\/v2\/media\/10623"}],"wp:attachment":[{"href":"https:\/\/pcecatlam.vn\/km\/wp-json\/wp\/v2\/media?parent=10622"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/pcecatlam.vn\/km\/wp-json\/wp\/v2\/categories?post=10622"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/pcecatlam.vn\/km\/wp-json\/wp\/v2\/tags?post=10622"},{"taxonomy":"yst_prominent_words","embeddable":true,"href":"https:\/\/pcecatlam.vn\/km\/wp-json\/wp\/v2\/yst_prominent_words?post=10622"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}