{"id":11081,"date":"2023-10-31T03:58:47","date_gmt":"2020-12-08T08:05:56","guid":{"rendered":"http:\/\/localhost\/xaydungnhadat\/?p=11081"},"modified":"2022-09-17T03:41:53","modified_gmt":"2022-09-17T03:41:53","slug":"cat-xay-dung-la-gi-kinh-nghiem-chon-cat-xay-dung","status":"publish","type":"post","link":"https:\/\/xaydungnhandat.com.vn\/?p=11081","title":{"rendered":"C\u00e1t X\u00e2y D\u1ef1ng L\u00e0 G\u00ec? Kinh Nghi\u1ec7m Ch\u1ecdn C\u00e1t X\u00e2y D\u1ef1ng"},"content":{"rendered":"

C\u00e1t x\u00e2y d\u1ef1ng \u0111\u01b0\u1ee3c l\u1ea5y t\u1eeb \u0111\u00e2u v\u00e0 nh\u1eefng \u0111i\u1ec1u c\u1ea7n bi\u1ebft v\u1ec1 c\u00e1t x\u00e2y d\u1ef1ngl\u00a0C\u00e1t x\u00e2y d\u1ef1ng<\/strong> l\u00e0 nguy\u00ean v\u1eadt li\u1ec7u m\u00e0 r\u1ea5t nhi\u1ec1u ch\u00fang ta \u0111\u1ec1u bi\u1ebft \u0111\u1ebfn v\u00e0 nh\u1eadn ra trong cu\u1ed9c s\u1ed1ng quanh co ta. Tuy nhi\u00ean, c\u00e1t x\u00e2y d\u1ef1ng l\u00e0 g\u00ec<\/strong> & bao g\u1ed3m c\u00e1c lo\u1ea1i c\u00e1t x\u00e2y d\u1ef1ng n\u00e0o? C\u00e1t \u0111\u01b0\u1ee3c l\u1ea5y t\u1eeb \u0111\u00e2u, v\u00e0 v\u1edbi bao nhi\u00eau chi\u1ebfc c\u00e1t\u2026l\u00e0 \u0111i\u1ec1u m\u00e0 kh\u00f4ng ph\u1ea3i ai c\u0169ng bi\u1ebft. B\u00e0i vi\u1ebft n\u00e0y ch\u00fang ta s\u1ebd c\u00f9ng ph\u00e2n t\u00edch v\u1ec1 v\u1ea5n \u0111\u1ec1 n\u00e0y v\u00e0 chia s\u1ebb m\u1ed9t s\u1ed1 kinh nghi\u1ec7m, c\u00e1c b\u1ea1n h\u00e3y \u0111\u00f3n xem nh\u00e9!<\/p>\n

C\u00e1t x\u00e2y d\u1ef1ng l\u00e0 g\u00ec?<\/h2>\n

C\u00e1t x\u00e2y d\u1ef1ng<\/strong> l\u00e0 nguy\u00ean v\u1eadt li\u1ec7u d\u1ea1ng h\u1ea1t ngu\u1ed3n g\u1ed1c t\u1ef1 nhi\u00ean bao g\u1ed3m nh\u1eefng h\u1ea1t \u0111\u00e1 & kho\u00e1ng v\u1eadt nh\u1ecf v\u00e0 m\u1ecbn.<\/p>\n

K\u00edch th\u01b0\u1edbc c\u00e1t h\u1ea1t\u00a0c\u00e1t x\u00e2y d\u1ef1ng<\/strong> theo \u0111\u01b0\u1eddng k\u00ednh trung b\u00ecnh n\u1eb1m trong kho\u1ea3ng t\u1eeb 0,0625 mm \u0111\u1ebfn 2 mm (thang Wentworth s\u1eed d\u1ee5ng t\u1ea1i Hoa K\u1ef3) ho\u1eb7c t\u1eeb 0,05 mm t\u1edbi 1 mm (thang Kachinskii d\u00f9ng t\u1ea1i Nga v\u00e0 Vi\u1ec7t Nam hi\u1ec7n nay).<\/p>\n

M\u1ed9t h\u1ea1t v\u1eadt li\u1ec7u t\u1ef1 nhi\u00ean n\u1ebfu c\u00f3 k\u00edch th\u01b0\u1edbc n\u1eb1m trong c\u00e1c k\u00edch th\u01b0\u1edbc n\u00e0y \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 h\u1ea1t\u00a0c\u00e1t<\/strong>. L\u1edbp k\u00edch th\u01b0\u1edbc h\u1ea1t c\u00e1t nh\u1ecf h\u01a1n k\u1ebf ti\u1ebfp trong \u0111\u1ecba ch\u1ea5t h\u1ecdc g\u1ecdi l\u00e0 \u0111\u1ea5t b\u00f9n (M\u1ef9) v\u1edbi nh\u1eefng h\u1ea1t c\u00f3 \u0111\u01b0\u1eddng k\u00ednh nh\u1ecf h\u01a1n 0,0625 mm cho t\u1edbi 0,004 mm hay b\u1ee5i (Nga) v\u1edbi c\u00e1c h\u1ea1t c\u00f3 \u0111\u01b0\u1eddng k\u00ednh nh\u1ecf h\u01a1n 0,05 mm cho t\u1edbi 0,001 mm.<\/p>\n

\"C\u00f4ng
C\u00e1t x\u00e2y d\u1ef1ng l\u00e0 g\u00ec?<\/figcaption><\/figure>\n

L\u1edbp k\u00edch th\u01b0\u1edbc h\u1ea1t l\u1edbn h\u01a1n k\u1ebf ti\u1ebfp l\u00e0 s\u1ecfi\/cu\u1ed9i v\u1edbi \u0111\u01b0\u1eddng k\u00ednh h\u1ea1t n\u1eb1m trong kho\u1ea3ng t\u1eeb 2 mm \u0111\u1ebfn 64 mm (M\u1ef9) hay t\u1eeb 1 \u0111\u1ebfn 3 mm (Nga).<\/p>\n

Khi c\u1ecd x\u00e1t gi\u1eefa c\u00e1c ng\u00f3n tay th\u00ec c\u00e1t s\u1ebd t\u1ea1o ra c\u1ea3m gi\u00e1c s\u00e0n s\u1ea1n (ch\u1ee9 kh\u00f4ng nh\u01b0 \u0111\u1ea5t b\u00f9n t\u1ea1o c\u1ea3m gi\u00e1c tr\u01a1n nh\u01b0 b\u1ed9t).<\/p>\n

C\u00e1t x\u00e2y d\u1ef1ng<\/strong>\u00a0\u1edf Vi\u1ec7t Nam chia ra 4 lo\u1ea1i th\u00f4ng d\u1ee5ng:\u00a0C\u00e1t v\u00e0ng x\u00e2y d\u1ef1ng, c\u00e1t san l\u1ea5p, c\u00e1t x\u00e2y t\u00f4 v\u00e0 c\u00e1t b\u00ea t\u00f4ng<\/strong><\/p>\n

C\u00e1t x\u00e2y t\u00f4, c\u00e1t b\u00ea t\u00f4ng l\u00e0 lo\u1ea1i c\u00e1t s\u00f4ng sau khi khai th\u00e1c \u0111\u01b0\u1ee3c r\u1eeda lo\u1ea1i s\u1ea1ch c\u00e1c t\u1ea1p ch\u1ea5t h\u1eefu c\u01a1. \u0110\u1ea3m b\u1ea3o c\u1ee1 h\u1ea1t theo ti\u00eau chu\u1ea9n TCVN 1770 \u2013 86 \u0111\u1ec3 s\u1eed d\u1ee5ng \u0111\u00fang cho t\u1eebng lo\u1ea1i c\u00f4ng vi\u1ec7c, b\u1ea3o \u0111\u1ea3m y\u00eau c\u1ea7u k\u1ef9 thu\u1eadt.<\/p>\n

C\u00e1t x\u00e2y d\u1ef1ng c\u00f3 m\u1ea5y lo\u1ea1i?<\/h2>\n

C\u00e1t kh\u00f4ng ch\u1ec9 c\u00f3 m\u1ed9t chi\u1ebfc m\u00e0 ch\u00fang \u0111\u01b0\u1ee3c chia th\u00e0nh r\u1ed9ng r\u00e3i nh\u1eefng d\u00f2ng c\u00e1t kh\u00e1c nhau do t\u00ednh ch\u1ea5t kh\u00e1c nhau nh\u01b0 m\u00e0u s\u1eafc, k\u00edch th\u01b0\u1edbc h\u1ea1t c\u00e1t, \u0111\u1ed9 m\u1ecbn, hay th\u00e0nh ph\u1ea7n h\u00f3a h\u1ecdc\u2026Hi\u1ec7n nay, c\u00e1t x\u00e2y d\u1ef1ng \u0111\u01b0\u1ee3c chia th\u00e0nh 3 lo\u1ea1i ch\u00ednh l\u00e0: c\u00e1t v\u00e0ng, c\u00e1t \u0111en, v\u00e0 c\u00e1t san l\u1ea5p.<\/span><\/p>\n

C\u00e1t \u0111en<\/h3>\n