{"id":8979,"date":"2021-11-21T15:36:37","date_gmt":"2021-11-21T08:36:37","guid":{"rendered":"https:\/\/www.vietlearn.org\/post\/?p=8979"},"modified":"2021-11-21T16:04:00","modified_gmt":"2021-11-21T09:04:00","slug":"tai-sao-can-cho-khong-khi-vao-trong-betong","status":"publish","type":"post","link":"https:\/\/www.vietlearn.org\/kien-thuc\/tai-sao-can-cho-khong-khi-vao-trong-betong\/","title":{"rendered":"T\u1ea1i sao c\u1ea7n cho kh\u00f4ng kh\u00ed v\u00e0o trong b\u00eat\u00f4ng?"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">B\u00eat\u00f4ng l\u00e0 m\u1ed9t lo\u1ea1i v\u1eadt li\u1ec7u x\u00e2y d\u1ef1ng r\u1ea5t n\u1eb7ng, th\u00f4ng th\u01b0\u1eddng 1 m3 b\u00eat\u00f4ng n\u1eb7ng kho\u1ea3ng 2 t\u1ea5n, t\u01b0\u01a1ng \u0111\u01b0\u01a1ng v\u1edbi tr\u1ecdng l\u01b0\u1ee3ng c\u1ee7a \u0111\u00e1. B\u00eat\u00f4ng c\u00f3 nhi\u1ec1u c\u00f4ng d\u1ee5ng, \u0111\u1ec3 \u0111\u00e1p \u1ee9ng c\u00e1c y\u00eau c\u1ea7u kh\u00e1c nhau, ng\u01b0\u1eddi ta t\u00ecm c\u00e1ch s\u1ea3n xu\u1ea5t lo\u1ea1i b\u00eat\u00f4ng t\u01b0\u01a1ng \u0111\u1ed1i nh\u1eb9 h\u01a1n, cho kh\u00f4ng kh\u00ed v\u00e0o trong b\u00eat\u00f4ng l\u00e0 m\u1ed9t c\u00e1ch \u0111\u00f3, g\u1ecdi l\u00e0 b\u00eat\u00f4ng nh\u1eb9, hay b\u00eat\u00f4ng gia kh\u00ed.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">S\u1ea3n xu\u1ea5t b\u00eat\u00f4ng gia kh\u00ed, kh\u00f4ng c\u00f3 ngh\u0129a l\u00e0 cho kh\u00f4ng kh\u00ed v\u00e0o trong b\u00eat\u00f4ng, m\u00e0 trong nguy\u00ean li\u1ec7u l\u00e0m b\u00eat\u00f4ng ng\u01b0\u1eddi ta tr\u1ed9n th\u00eam m\u1ed9t lo\u1ea1i thu\u1ed1c sinh b\u1ecdt. B\u1ecdt kh\u00ed m\u00e0 n\u00f3 s\u1ea3n sinh ra s\u1ebd ph\u00e2n b\u1ed1 \u0111\u1ec1u trong b\u00eat\u00f4ng, sau khi b\u00eat\u00f4ng \u0111\u00f4ng c\u1ee9ng s\u1ebd \u0111\u1ec3 l\u1ea1i nh\u1eefng l\u1ed7 r\u1ed7ng theo m\u1ed9t t\u1ef7 l\u1ec7 nh\u1ea5t \u0111\u1ecbnh, c\u00f3 l\u1ed7 r\u1ed7ng to, l\u1ed7 r\u1ed7ng nh\u1ecf, l\u1ed7 r\u1ed7ng \u00edt, l\u1ed7 r\u1ed7ng nhi\u1ec1u, v\u00ec v\u1eady m\u00e0 \u0111\u00e3 s\u1ea3n xu\u1ea5t \u0111\u01b0\u1ee3c c\u00e1c lo\u1ea1i b\u00eat\u00f4ng gia kh\u00ed c\u00f3 t\u1ef7 tr\u1ecdng kh\u00e1c nhau. Lo\u1ea1i &#8220;b\u00eat\u00f4ng b\u1ecdt&#8221; n\u1ed5i ti\u1ebfng m\u1ed7i m\u00e9t kh\u1ed1i ch\u1ec9 n\u1eb7ng 0,4 t\u1ea5n, b\u1eb1ng kho\u1ea3ng 1\/5 kh\u1ed1i l\u01b0\u1ee3ng b\u00eat\u00f4ng th\u01b0\u1eddng.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u01afu \u0111i\u1ec3m tr\u01b0\u1edbc ti\u00ean c\u1ee7a b\u00eat\u00f4ng gia kh\u00ed l\u00e0 t\u01b0\u01a1ng \u0111\u1ed1i nh\u1eb9, l\u00e0m cho tr\u1ecdng l\u01b0\u1ee3ng c\u1ee7a c\u1ea3 ki\u1ebfn tr\u00fac nh\u1eb9 \u0111i nhi\u1ec1u, v\u1eeba d\u1ec5 thi c\u00f4ng, l\u1ea1i \u0111\u1eb7c bi\u1ec7t th\u00edch h\u1ee3p v\u1edbi c\u00e1c v\u00f9ng hay x\u1ea3y ra \u0111\u1ed9ng \u0111\u1ea5t. M\u1eb7t kh\u00e1c, v\u00ec trong b\u00eat\u00f4ng c\u00f3 r\u1ea5t nhi\u1ec1u b\u1ecdt, n\u00ean t\u00ednh n\u0103ng gi\u1eef nhi\u1ec7t r\u1ea5t th\u00edch h\u1ee3p cho c\u00e1c v\u00f9ng gi\u00e1 r\u00e9t ho\u1eb7c n\u00f3ng n\u1ef1c. \u1ede m\u1ed9t s\u1ed1 n\u01b0\u1edbc v\u00f9ng Trung \u0110\u00f4ng, di\u1ec7n t\u00edch sa m\u1ea1c r\u1ea5t l\u1edbn, v\u1eadt li\u1ec7u c\u00e1t d\u00f9ng \u0111\u1ec3 s\u1ea3n xu\u1ea5t b\u00ea t\u00f4ng gia kh\u00ed l\u00e0 v\u00f4 t\u1eadn. D\u00f9ng b\u00eat\u00f4ng gia kh\u00ed \u0111\u1ec3 x\u00e2y d\u1ef1ng nh\u00e0 \u1edf, t\u00ednh n\u0103ng c\u00e1ch nhi\u1ec7t, ch\u1ed1ng ch\u00e1y r\u1ea5t \u01b0u vi\u1ec7t. H\u01a1n n\u1eefa, b\u00eat\u00f4ng gia kh\u00ed l\u1ea1i r\u1ea5t d\u1ec5 c\u01b0a, b\u00e0o, g\u1ecdt, \u0111\u00f3ng \u0111inh, gia c\u00f4ng. B\u00eat\u00f4ng gia kh\u00ed r\u1ea5t c\u00f3 ti\u1ec1n \u0111\u1ed3 ph\u00e1t tri\u1ec3n.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u01b0\u01a1ng nhi\u00ean, v\u00ec c\u01b0\u1eddng \u0111\u1ed9 t\u01b0\u01a1ng \u0111\u1ed1i th\u1ea5p, n\u00ean b\u00eat\u00f4ng gia kh\u00ed kh\u00f4ng n\u00ean d\u00f9ng \u0111\u1ec3 x\u00e2y d\u1ef1ng c\u00e1c ki\u1ebfn tr\u00fac cao t\u1ea7ng, n\u00f3i chung ch\u1ec9 c\u00f3 th\u1ec3 d\u00f9ng \u0111\u1ec3 l\u00e0m t\u01b0\u1eddng ch\u1ecbu t\u1ea3i tr\u1ecdng c\u1ee7a c\u00e1c ki\u1ebfn tr\u00fac th\u1ea5p, \u00edt t\u1ea7ng.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">T\u1eeb kh\u00f3a: B\u00ea t\u00f4ng gia kh\u00ed.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>B\u00eat\u00f4ng l\u00e0 m\u1ed9t lo\u1ea1i v\u1eadt li\u1ec7u x\u00e2y d\u1ef1ng r\u1ea5t n\u1eb7ng, th\u00f4ng th\u01b0\u1eddng 1 m3 b\u00eat\u00f4ng n\u1eb7ng kho\u1ea3ng 2 t\u1ea5n, t\u01b0\u01a1ng \u0111\u01b0\u01a1ng v\u1edbi tr\u1ecdng l\u01b0\u1ee3ng c\u1ee7a \u0111\u00e1. B\u00eat\u00f4ng c\u00f3 nhi\u1ec1u c\u00f4ng d\u1ee5ng, \u0111\u1ec3 \u0111\u00e1p \u1ee9ng c\u00e1c y\u00eau c\u1ea7u kh\u00e1c nhau, ng\u01b0\u1eddi ta t\u00ecm c\u00e1ch s\u1ea3n xu\u1ea5t lo\u1ea1i b\u00eat\u00f4ng t\u01b0\u01a1ng \u0111\u1ed1i nh\u1eb9 h\u01a1n, cho kh\u00f4ng kh\u00ed v\u00e0o [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_disable_autopaging":false},"categories":[15,16],"tags":[],"class_list":["post-8979","post","type-post","status-publish","format-standard","hentry","category-hoi-dap-khoa-hoc","category-ky-thuat"],"_links":{"self":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/8979","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/comments?post=8979"}],"version-history":[{"count":0,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/8979\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=8979"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=8979"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=8979"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}