{"id":7804,"date":"2017-11-06T00:52:51","date_gmt":"2017-11-05T17:52:51","guid":{"rendered":"http:\/\/ttud.com.vn\/?p=7804"},"modified":"2017-12-04T00:53:17","modified_gmt":"2017-12-03T17:53:17","slug":"su-dung-chai-nhua-chieu-xa-de-che-tao-be-tong-chac-chan-va-than-thien-voi-moi-truong","status":"publish","type":"post","link":"https:\/\/casta.ttud.com.vn\/index.php\/su-dung-chai-nhua-chieu-xa-de-che-tao-be-tong-chac-chan-va-than-thien-voi-moi-truong\/","title":{"rendered":"S\u1eed d\u1ee5ng chai nh\u1ef1a chi\u1ebfu x\u1ea1 \u0111\u1ec3 ch\u1ebf t\u1ea1o b\u00ea t\u00f4ng ch\u1eafc ch\u1eafn v\u00e0 th\u00e2n thi\u1ec7n v\u1edbi m\u00f4i tr\u01b0\u1eddng"},"content":{"rendered":"<p align=\"center\"><img decoding=\"async\" src=\"http:\/\/khoahocvacongnghevietnam.com.vn\/images\/stories\/thang-11-2017\/611-sudung.jpg\" alt=\"alt\" \/><\/p>\n<p>M\u1ed9t nh\u00f3m sinh vi\u00ean t\u1ea1i Vi\u1ec7n C\u00f4ng ngh\u1ec7 Massachusetts (MIT) \u0111\u00e3 ph\u00e1t hi\u1ec7n ra k\u1ef9 thu\u1eadt th\u00f4ng minh s\u1eed d\u1ee5ng c\u00e1c chai nh\u1ef1a chi\u1ebfu x\u1ea1 \u0111\u1ec3 t\u1ea1o ra m\u1ed9t lo\u1ea1i b\u00ea t\u00f4ng m\u1edbi ch\u1eafc h\u01a1n 20% b\u00ea t\u00f4ng th\u01b0\u1eddng.<\/p>\n<p>Nh\u00f3m nghi\u00ean c\u1ee9u b\u01b0\u1edbc \u0111\u1ea7u \u0111\u00e3 kh\u00e1m ph\u00e1 ra ph\u01b0\u01a1ng th\u1ee9c gi\u1ea3m ph\u00e1t th\u1ea3i c\u00e1c bon t\u1eeb ng\u00e0nh c\u00f4ng nghi\u1ec7p b\u00ea t\u00f4ng, chi\u1ebfm 4,5% ph\u00e1t th\u1ea3i CO<sub>2<\/sub>\u00a0do con ng\u01b0\u1eddi t\u1ea1o ra tr\u00ean to\u00e0n c\u1ea7u. H\u01b0\u1edbng nghi\u00ean c\u1ee9u c\u1ee7a c\u00e1c t\u00e1c gi\u1ea3 l\u00e0 t\u00e1i ch\u1ebf kh\u1ed1i l\u01b0\u1ee3ng l\u1edbn nh\u1ef1a \u0111\u1ed5 v\u00e0o b\u00e3i ch\u00f4n r\u00e1c m\u1ed7i n\u0103m v\u00e0 s\u1eed d\u1ee5ng \u0111\u1ec3 c\u1ea3i thi\u1ec7n ho\u1ea1t \u0111\u1ed9ng s\u1ea3n xu\u1ea5t b\u00ea t\u00f4ng. Tr\u01b0\u1edbc \u0111\u00e2y \u0111\u00e3 t\u1eebng c\u00f3 m\u1ed9t nghi\u00ean c\u1ee9u kh\u00e1c tr\u1ed9n nh\u1ef1a v\u00e0o xi m\u0103ng nh\u01b0ng kh\u00f4ng th\u00e0nh c\u00f4ng do nh\u1ef1a l\u00e0m suy y\u1ebfu b\u00ea t\u00f4ng.<\/p>\n<p>Trong nghi\u00ean c\u1ee9u, c\u00e1c nh\u00e0 khoa h\u1ecdc \u0111\u00e3 cho nh\u1ef1a ti\u1ebfp x\u00fac v\u1edbi b\u1ee9c x\u1ea1 gamma \u0111\u1ec3 b\u00ea t\u00f4ng ch\u1eafc h\u01a1n. Sau \u0111\u00f3, nh\u1ef1a b\u1ee9c x\u1ea1 \u0111\u00e3 tr\u1edf th\u00e0nh \u0111i\u1ec3m k\u1ebft n\u1ed1i \u0111i\u1ec7n v\u00e0 tr\u1ed9n xi m\u0103ng. K\u1ebft qu\u1ea3 l\u00e0 b\u00ea t\u00f4ng \u0111\u00e3 t\u0103ng 20% \u0111\u1ed9 ch\u1eafc ch\u1eafn so v\u1edbi b\u00ea t\u00f4ng \u0111\u01b0\u1ee3c s\u1ea3n xu\u1ea5t kh\u00f4ng c\u00f3 nh\u1ef1a chi\u1ebfu x\u1ea1.<\/p>\n<p>Kunal Kupwade-Patil, m\u1ed9t trong c\u00e1c nh\u00e0 khoa h\u1ecdc c\u1ee7a d\u1ef1 \u00e1n cho bi\u1ebft: Ch\u00fang t\u00f4i \u0111\u00e3 quan s\u00e1t th\u1ea5y trong c\u00e1c th\u00f4ng s\u1ed1 c\u1ee7a ch\u01b0\u01a1ng tr\u00ecnh th\u1eed nghi\u1ec7m, li\u1ec1u b\u1ee9c x\u1ea1 c\u00e0ng cao th\u00ec b\u00ea t\u00f4ng c\u00e0ng ch\u1eafc. Do \u0111\u00f3, c\u1ea7n nghi\u00ean c\u1ee9u th\u00eam \u0111\u1ec3 \u0111i\u1ec1u ch\u1ec9nh h\u1ed7n h\u1ee3p v\u00e0 t\u1ed1i \u01b0u h\u00f3a quy tr\u00ecnh b\u1eb1ng c\u00e1ch chi\u1ebfu x\u1ea1 \u0111\u1ec3 cho c\u00f3 k\u1ebft qu\u1ea3 t\u1ed1t nh\u1ea5t.<\/p>\n<p>Quan s\u00e1t b\u00ea t\u00f4ng \u0111\u01b0\u1ee3c l\u00e0m t\u1eeb nh\u1ef1a b\u1eb1ng k\u00ednh hi\u1ec3n vi \u0111i\u1ec7n t\u1eed t\u00e1n x\u1ea1 ng\u01b0\u1ee3c v\u00e0 ch\u1ee5p c\u1eaft l\u1edbp vi c\u1ea5u tr\u00fac tia X, nh\u00f3m nghi\u00ean c\u1ee9u \u0111\u00e3 ph\u00e1t hi\u1ec7n ra r\u1eb1ng \u0111\u1ed9 k\u1ebft tinh c\u1ee7a b\u00ea t\u00f4ng v\u1ec1 c\u01a1 b\u1ea3n \u0111\u00e3 thay \u0111\u1ed5i \u0111\u1ec3 tr\u1edf n\u00ean \u0111\u1eadm \u0111\u1eb7c h\u01a1n nh\u1edd b\u1ed5 sung nh\u1ef1a b\u1ee9c x\u1ea1. \u0110i\u1ec3m c\u1ea7n l\u01b0u \u00fd l\u00e0 s\u1ea3n ph\u1ea9m cu\u1ed1i c\u00f9ng kh\u00f4ng ch\u1ee9a b\u1ea5t k\u1ef3 ch\u1ea5t ph\u00f3ng x\u1ea1 n\u00e0o.<\/p>\n<p>Michael Short, Ph\u00f3 gi\u00e1o s\u01b0 v\u1ec1 Khoa h\u1ecdc v\u00e0 H\u1ea1t nh\u00e2n cho r\u1eb1ng: Kh\u00f4ng c\u00f3 ph\u00f3ng x\u1ea1 t\u1ed3n d\u01b0 t\u1eeb lo\u1ea1i h\u00ecnh chi\u1ebfu x\u1ea1 n\u00e0y. N\u1ebfu b\u1ea1n \u0111\u01b0a th\u1ee9 g\u00ec \u0111\u00f3 v\u00e0o trong l\u00f2 ph\u1ea3n \u1ee9ng v\u00e0 chi\u1ebfu x\u1ea1 b\u1eb1ng c\u00e1c neutron, n\u00f3 tr\u1edf th\u00e0nh ph\u00f3ng x\u1ea1. Nh\u01b0ng tia gamma l\u00e0 m\u1ed9t lo\u1ea1i b\u1ee9c x\u1ea1 kh\u00e1c, trong h\u1ea7u h\u1ebft c\u00e1c tr\u01b0\u1eddng h\u1ee3p, kh\u00f4ng \u0111\u1ec3 l\u1ea1i d\u1ea5u v\u1ebft c\u1ee7a b\u1ee9c x\u1ea1.<\/p>\n<p>D\u00f9 nh\u1ef1a chi\u1ebfu x\u1ea1 ch\u1ec9 chi\u1ebfm 1,5% h\u1ed7n h\u1ee3p b\u00ea t\u00f4ng, nh\u01b0ng c\u00e1c nh\u00e0 nghi\u00ean c\u1ee9u cho r\u1eb1ng tr\u00ean quy m\u00f4 to\u00e0n c\u1ea7u, \u0111i\u1ec1u n\u00e0y v\u1eabn s\u1ebd t\u00e1c \u0111\u1ed9ng l\u1edbn \u0111\u1ebfn ph\u00e1t th\u1ea3i cacbon, c\u0169ng nh\u01b0 gi\u1ea3m ch\u00f4n l\u1ea5p nh\u1ef1a v\u00e0 t\u1ea1o ra s\u1ea3n ph\u1ea9m b\u00ea t\u00f4ng ch\u1eafc h\u01a1n. Kh\u1ea3 n\u0103ng gi\u1ea3m to\u00e0n b\u1ed9 ph\u00e1t th\u1ea3i t\u1eeb qu\u00e1 tr\u00ecnh n\u00e0y v\u1eabn \u0111ang b\u1ecb ho\u00e0i nghi do nh\u00f3m nghi\u00ean c\u1ee9u kh\u00f4ng \u0111\u1ec1 c\u1eadp \u0111\u1ebfn m\u1ee9c n\u0103ng l\u01b0\u1ee3ng (ho\u1eb7c kh\u00ed th\u1ea3i cacbon) \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng cho t\u00e1i ch\u1ebf v\u00e0 chi\u1ebfu x\u1ea1 nh\u1ef1a.<\/p>\n<p align=\"right\"><em>(Vista)<\/em><\/p>\n","protected":false},"excerpt":{"rendered":"<p>M\u1ed9t nh\u00f3m sinh vi\u00ean t\u1ea1i Vi\u1ec7n C\u00f4ng ngh\u1ec7 Massachusetts (MIT) \u0111\u00e3 ph\u00e1t hi\u1ec7n ra k\u1ef9 thu\u1eadt th\u00f4ng minh s\u1eed d\u1ee5ng c\u00e1c chai nh\u1ef1a chi\u1ebfu x\u1ea1 \u0111\u1ec3 t\u1ea1o ra m\u1ed9t lo\u1ea1i b\u00ea t\u00f4ng m\u1edbi ch\u1eafc h\u01a1n 20% b\u00ea t\u00f4ng th\u01b0\u1eddng. Nh\u00f3m nghi\u00ean c\u1ee9u b\u01b0\u1edbc \u0111\u1ea7u \u0111\u00e3 kh\u00e1m ph\u00e1 ra ph\u01b0\u01a1ng th\u1ee9c gi\u1ea3m ph\u00e1t th\u1ea3i c\u00e1c bon [&hellip;]<\/p>\n","protected":false},"author":18,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[47],"tags":[],"class_list":["post-7804","post","type-post","status-publish","format-standard","hentry","category-tin-tuc"],"_links":{"self":[{"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/posts\/7804","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/users\/18"}],"replies":[{"embeddable":true,"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/comments?post=7804"}],"version-history":[{"count":1,"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/posts\/7804\/revisions"}],"predecessor-version":[{"id":7805,"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/posts\/7804\/revisions\/7805"}],"wp:attachment":[{"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/media?parent=7804"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/categories?post=7804"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/tags?post=7804"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}