{"id":17223,"date":"2022-05-31T10:05:36","date_gmt":"2022-05-31T03:05:36","guid":{"rendered":"https:\/\/metmar.net\/?p=17223"},"modified":"2022-05-31T10:12:18","modified_gmt":"2022-05-31T03:12:18","slug":"nghien-cuu-thanh-phan-tinh-cong-tac-va-do-ben-sunphat-cua-be-tong-co-cap-do-ben-b40-su-dung-xi-hat-lo-cao-nghien-min","status":"publish","type":"post","link":"https:\/\/metmar.net\/nghien-cuu-thanh-phan-tinh-cong-tac-va-do-ben-sunphat-cua-be-tong-co-cap-do-ben-b40-su-dung-xi-hat-lo-cao-nghien-min\/","title":{"rendered":"Nghi\u00ean c\u1ee9u th\u00e0nh ph\u1ea7n, t\u00ednh c\u00f4ng t\u00e1c v\u00e0 \u0111\u1ed9 b\u1ec1n sunphat c\u1ee7a b\u00ea t\u00f4ng c\u00f3 c\u1ea5p \u0111\u1ed9 b\u1ec1n B40 s\u1eed d\u1ee5ng x\u1ec9 h\u1ea1t l\u00f2 cao nghi\u1ec1n m\u1ecbn"},"content":{"rendered":"
Nh\u00f3m t\u00e1c gi\u1ea3:<\/span><\/strong> Nguyen Van Cong(1)<\/sup>, Nguyen Van Ngon(2)<\/sup> (1 <\/sup>Faculty of civil engineering – Quang Trung University; <\/span>2 <\/sup>Faculty of civil engineering – Hue College of Transport)<\/span><\/span><\/div>\n
N\u01a1i \u0111\u0103ng:<\/span><\/strong> Chuy\u00ean san K\u1ef9 thu\u1eadt v\u00e0 C\u00f4ng ngh\u1ec7, T\u1ea1p ch\u00ed Khoa h\u1ecdc \u0110\u1ea1i h\u1ecdc Hu\u1ebf, 2A (126), 2017.<\/span><\/span><\/div>\n
L\u0129nh v\u1ef1c:<\/span><\/strong> K\u1ef9 thu\u1eadt v\u00e0 C\u00f4ng ngh\u1ec7<\/span>; Lo\u1ea1i:<\/span><\/strong> b\u00e0i b\u00e1o khoa h\u1ecdc; Th\u1ec3 lo\u1ea1i:<\/span><\/strong> trong n\u01b0\u1edbc.<\/span><\/div>\n
<\/div>\n
T\u00f3m t\u1eaft<\/strong><\/div>\n

X\u1ec9 l\u00f2 cao l\u00e0 th\u1ea3i ph\u1ea9m c\u1ee7a qu\u00e1 tr\u00ecnh luy\u1ec7n gang trong l\u00f2 cao, hi\u1ec7n ch\u01b0a \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng h\u1ee3p l\u00fd, g\u00e2y \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn\u00a0n\u1ec1n kinh t\u1ebf\u00a0v\u00e0 m\u00f4i tr\u01b0\u1eddng \u1edf\u00a0n\u01b0\u1edbc ta. M\u1eb7t kh\u00e1c t\u1ea5n c\u00f4ng sunphat l\u00e0 m\u1ed9t trong nh\u1eefng nh\u00e2n t\u1ed1 ch\u00ednh \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn \u0111\u1ed9 b\u1ec1n v\u00e0 tu\u1ed5i th\u1ecd c\u1ee7a c\u00f4ng tr\u00ecnh s\u1eed d\u1ee5ng v\u1eadt li\u1ec7u b\u00ea t\u00f4ng xi m\u0103ng t\u1ed3n t\u1ea1i trong m\u00f4i tr\u01b0\u1eddng ven bi\u1ec3n. T\u1ea5n c\u00f4ng sunphat d\u1eabn \u0111\u1ebfn s\u1ef1 bi\u1ebfn \u0111\u1ed5i v\u1ec1 h\u00f3a h\u1ecdc c\u00e1c s\u1ea3n ph\u1ea9m hy\u0111rat c\u1ee7a xi m\u0103ng, h\u1eadu qu\u1ea3 d\u1eabn \u0111\u1ebfn s\u1ef1 gi\u00e3n n\u1edf, m\u1ea5t t\u00ednh d\u00ednh k\u1ebft, gi\u1ea3m c\u01b0\u1eddng \u0111\u1ed9, t\u0103ng \u0111\u1ed9 r\u1ed7ng, v\u1ee1 b\u1ec1 m\u1eb7t hay t\u00e1ch l\u1edbp, th\u1eadm ch\u00ed ph\u00e1 ho\u1ea1i ho\u00e0n to\u00e0n k\u1ebft c\u1ea5u b\u00ea t\u00f4ng. Hai \u0111\u1eb7c \u0111i\u1ec3m ch\u00ednh d\u1eabn \u0111\u1ebfn s\u1ef1 h\u01b0 h\u1ecfng b\u00ea t\u00f4ng do t\u1ea5n c\u00f4ng sun-ph\u00e1t b\u00ean ngo\u00e0i l\u00e0: (1) S\u1ef1 h\u00ecnh th\u00e0nh th\u1ea1ch cao v\u00e0 ettringite khi b\u00ea t\u00f4ng \u0111\u00e3 \u0111\u00f4ng c\u1ee9ng g\u00e2y ra gi\u00e3n n\u1edf; (2) v\u00e0\/ ho\u1eb7c ph\u00e1 h\u1ee7y gel C-S-H (nh\u00e2n t\u1ed1 ch\u00ednh g\u00f3p ph\u1ea7n h\u00ecnh th\u00e0nh c\u01b0\u1eddng \u0111\u1ed9 b\u00ea t\u00f4ng). B\u00e0i b\u00e1o t\u1eadp trung nghi\u00ean c\u1ee9u hi\u1ec7u qu\u1ea3 c\u1ee7a x\u1ec9 h\u1ea1t l\u00f2 cao nghi\u1ec1n m\u1ecbn \u0111\u1ed1i v\u1edbi \u0111\u1ed9 b\u1ec1n c\u1ee7a b\u00ea t\u00f4ng t\u1ed3n t\u1ea1i trong m\u00f4i tr\u01b0\u1eddng sunphat (dung d\u1ecbch MgSO4<\/sub>\u00a05% v\u00e0 Na2<\/sub>SO4<\/sub>\u00a05%). \u0110\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c m\u1ee5c ti\u00eau n\u00e0y, ch\u00fang t\u00f4i ti\u1ebfn h\u00e0nh thi\u1ebft k\u1ebf th\u00e0nh ph\u1ea7n c\u1ea5p ph\u1ed1i cho b\u00ea t\u00f4ng c\u00f3 c\u1ea5p \u0111\u1ed9 b\u1ec1n B40, m\u1ed9t l\u01b0\u1ee3ng x\u1ec9 h\u1ea1t l\u00f2 cao nghi\u1ec1n m\u1ecbn s\u1ebd \u0111\u01b0\u1ee3c d\u00f9ng thay th\u1ebf cho xi m\u0103ng \u1edf c\u00e1c m\u1ee9c 0%, 30%, 50% v\u00e0 70% theo kh\u1ed1i l\u01b0\u1ee3ng c\u1ee7a ch\u1ea5t d\u00ednh k\u1ebft. C\u00e1c m\u1eabu b\u00ea t\u00f4ng h\u00ecnh tr\u1ee5 \u0111\u01b0\u1ee3c \u0111\u00fac v\u00e0 ng\u00e2m trong c\u00e1c th\u00f9ng dung d\u1ecbch MgSO4<\/sub>\u00a05% v\u00e0 Na2<\/sub>SO4<\/sub>\u00a05%. K\u1ebft qu\u1ea3 th\u00ed nghi\u1ec7m \u0111\u00e3 l\u00e0m r\u00f5 t\u00ednh h\u1eefu \u00edch c\u1ee7a x\u1ec9 h\u1ea1t l\u00f2 cao nghi\u1ec1n m\u1ecbn \u0111\u1ed1i v\u1edbi s\u1ef1 suy gi\u1ea3m \u0111\u1ed9 b\u1ec1n c\u1ee7a b\u00ea t\u00f4ng ng\u00e2m trong dung d\u1ecbch sunphat. To\u00e0n b\u1ed9 c\u00e1c th\u00ed nghi\u1ec7m n\u00e0y \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n t\u1ea1i Trung t\u00e2m Th\u00ed nghi\u1ec7m v\u00e0 Ki\u1ec3m \u0111\u1ecbnh X\u00e2y d\u1ef1ng (LAS-XD 1216) c\u1ee7a Tr\u01b0\u1eddng Cao \u0111\u1eb3ng Giao th\u00f4ng Hu\u1ebf.<\/p>\n

T\u1eeb kh\u00f3a: <\/strong><\/span>X\u1ec9 l\u00f2 cao nghi\u1ec1n m\u1ecbn, x\u1ec9 l\u00f2 cao, x\u1ec9, \u0103n m\u00f2n sun ph\u00e1t tr\u00ean b\u00ea t\u00f4ng, v\u1eadt li\u1ec7u m\u1edbi<\/span><\/p>\n

Abstract: <\/strong>Blast furnace slag is a waste product of the production process of pig iron in the blast furnace, it has not been using rationally, so it has been affecting the economy and the environment of our country. On the other hand, sulphate attack is one of the main factors affecting the reliability and longevity of the building using concrete materials in the coastal environment. Sulphate attack alters the chemical products of cement hydrates, leading to the expansion, loss of cohesiveness, reduction in intensity, increased porosity, surface rupture or delamination, or even the complete destruction of concrete structures. Two main characteristics of concrete damage by sulfate attack from the outside are: (1) The formation of gypsum and ettringite when hardened concrete causes dilation; (2) and \/ or destroy the gel C-S-H (a major factor contributing to concrete strength). The article focused on studying the efficiency of ground granulated blast furnace slag and the durability of concrete in the environment exists sulphate (solution of MgSO4<\/sub>\u00a05% and Na2<\/sub>SO4<\/sub>\u00a05%). To achieve this goal, we have designed aggregate components for concrete level reliability B40. Ground granulated blast furnace slag will be substituted for cement at the rate of 0%, 30%, 50% and 70% by weight of the binder. The cylindrical concrete samples were molded and soaked in the solution barrel MgSO4<\/sub>\u00a05% and Na2<\/sub>SO4<\/sub>\u00a05%. Laboratory results have clarified the usefulness of ground granulated blast furnace slag to the declining strength of concrete when soaked in a solution of sulphate. All of the experiments were conducted at the Center for testing of Construction (LAS-XD 1216) of Hue College of Transport.<\/p>\n

Keywords: <\/strong><\/span>Ground granulated blast furnace slag, blast-furnace slag<\/em>, slags, sulfate attack on concrete,<\/em>\u00a0new materials.<\/em><\/span><\/p>\n","protected":false},"excerpt":{"rendered":"X\u1ec9 l\u00f2 cao l\u00e0 th\u1ea3i ph\u1ea9m c\u1ee7a qu\u00e1 tr\u00ecnh luy\u1ec7n gang trong l\u00f2 cao, hi\u1ec7n ch\u01b0a \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng h\u1ee3p l\u00fd, g\u00e2y \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn\u00a0n\u1ec1n kinh t\u1ebf\u00a0v\u00e0 m\u00f4i tr\u01b0\u1eddng \u1edf\u00a0n\u01b0\u1edbc ta. M\u1eb7t kh\u00e1c t\u1ea5n c\u00f4ng sunphat l\u00e0 m\u1ed9t trong nh\u1eefng nh\u00e2n t\u1ed1 ch\u00ednh \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn \u0111\u1ed9 b\u1ec1n v\u00e0 tu\u1ed5i th\u1ecd c\u1ee7a c\u00f4ng tr\u00ecnh s\u1eed d\u1ee5ng v\u1eadt li\u1ec7u b\u00ea t\u00f4ng xi m\u0103ng t\u1ed3n t\u1ea1i trong m\u00f4i tr\u01b0\u1eddng ven bi\u1ec3n. T\u1ea5n c\u00f4ng sunphat d\u1eabn \u0111\u1ebfn s\u1ef1 bi\u1ebfn \u0111\u1ed5i v\u1ec1 h\u00f3a h\u1ecdc c\u00e1c s\u1ea3n ph\u1ea9m hy\u0111rat c\u1ee7a xi m\u0103ng, h\u1eadu qu\u1ea3 d\u1eabn \u0111\u1ebfn s\u1ef1 gi\u00e3n n\u1edf, m\u1ea5t t\u00ednh d\u00ednh k\u1ebft, gi\u1ea3m c\u01b0\u1eddng \u0111\u1ed9, t\u0103ng \u0111\u1ed9 r\u1ed7ng, v\u1ee1 b\u1ec1 m\u1eb7t hay t\u00e1ch l\u1edbp, th\u1eadm ch\u00ed ph\u00e1 ho\u1ea1i ho\u00e0n to\u00e0n k\u1ebft c\u1ea5u b\u00ea t\u00f4ng.","protected":false},"author":12,"featured_media":17224,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"site-sidebar-layout":"default","site-content-layout":"default","ast-site-content-layout":"","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[42,62,81],"tags":[783,784,785,786],"class_list":["post-17223","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-cnkt","category-tin-tuc-khoa-hoc-ky-thuat","category-giang-vien-nckh-khoa-cnkt","tag-xi-lo-cao-nghien-min","tag-vat-lieu-moi","tag-an-mon-sun-phat-tren-be-tong","tag-xi-lo-cao"],"acf":[],"_links":{"self":[{"href":"https:\/\/metmar.net\/wp-json\/wp\/v2\/posts\/17223"}],"collection":[{"href":"https:\/\/metmar.net\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/metmar.net\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/metmar.net\/wp-json\/wp\/v2\/users\/12"}],"replies":[{"embeddable":true,"href":"https:\/\/metmar.net\/wp-json\/wp\/v2\/comments?post=17223"}],"version-history":[{"count":2,"href":"https:\/\/metmar.net\/wp-json\/wp\/v2\/posts\/17223\/revisions"}],"predecessor-version":[{"id":17226,"href":"https:\/\/metmar.net\/wp-json\/wp\/v2\/posts\/17223\/revisions\/17226"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/metmar.net\/wp-json\/wp\/v2\/media\/17224"}],"wp:attachment":[{"href":"https:\/\/metmar.net\/wp-json\/wp\/v2\/media?parent=17223"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/metmar.net\/wp-json\/wp\/v2\/categories?post=17223"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/metmar.net\/wp-json\/wp\/v2\/tags?post=17223"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}