【摘要】：通過自然暴露環(huán)境條件下?lián)胶狭匣炷恋脑缙谔蓟囼?分析了粉煤灰摻量、礦渣摻量、煤矸石摻量對單摻混凝土碳化深度的影響規(guī)律,探討了雙摻摻合料對混凝土碳化深度發(fā)展規(guī)律的交互作用,并基于試驗數(shù)據(jù)建立了摻合料碳化速度影響系數(shù)的表達式。結(jié)果表明:單摻粉煤灰摻量小于15%時混凝土的碳化深度略有減小但摻量超過15%后碳化深度隨粉煤灰摻量的增加而增加,單摻礦渣混凝土的碳化深度隨礦渣摻量的增加而增加,單摻小于20%的煤矸石使混凝土早期抗碳化性能提高但摻入超過30%的煤矸石后混凝土碳化深度明顯增加;隨著粉煤灰摻量的增加,雙摻粉煤灰和礦渣、雙摻粉煤灰和煤矸石的混凝土碳化深度增加,在粉煤灰混凝土中摻入25%礦渣或20%煤矸石后混凝土的碳化深度變化較小;在煤矸石混凝土中摻入25%~40%的礦渣時混凝土的碳化深度無明顯變化但再摻入超過40%的礦渣時碳化深度明顯增大,在礦渣混凝土中摻入20%煤矸石后混凝土的碳化深度增長約40%。
[Abstract]:Based on the early carbonization test of concrete mixed with admixture under natural exposure environment, the effect of fly ash content, slag content and coal gangue content on carbonation depth of concrete with single admixture is analyzed. The interaction of double admixtures on the development of concrete carbonation depth is discussed. Based on the experimental data, the expression of the influence coefficient of the carbonation speed of the admixture is established. The results show that the carbonation depth of concrete decreases slightly when the content of fly ash is less than 15%, but the carbonation depth increases with the increase of fly ash content, and the carbonation depth of concrete with single addition of slag increases with the increase of slag content. The carbonation depth of concrete with only coal gangue less than 20% increased in the early stage but more than 30% in coal gangue, and with the increase of fly ash content, both fly ash and slag were added. The carbonation depth of concrete mixed with fly ash and coal gangue is increased, and the carbonation depth of concrete with 25% slag or 20% coal gangue in fly ash concrete has little change. When 25% or 40% slag is added into coal gangue concrete, the carbonation depth of concrete does not change obviously, but when more than 40% slag is added, the carbonation depth of concrete increases about 40% after adding 20% coal gangue into slag concrete.
【作者單位】： 西安建筑科技大學土木工程學院;
【基金】：國家自然科學基金(51308441,51678473) 陜西省自然科學基礎(chǔ)研究計劃(2016JM5073) 陜西省教育廳專項科研計劃項目(2013JK0951)
【分類號】：TU528.041

【參考文獻】

相關(guān)期刊論文 前1條

1 王培銘,朱艷芳,計亦奇,沈中林;摻粉煤灰和礦渣粉大流動度混凝土的碳化性能[J];建筑材料學報;2001年04期

相關(guān)博士學位論文 前1條

1 賈耀東;大摻量礦物摻合料混凝土的碳化特性研究[D];清華大學;2010年

相關(guān)碩士學位論文 前1條

1 胡建軍;摻粉煤灰和礦渣粉混凝土的碳化行為及其影響因素的研究[D];清華大學;2010年

【共引文獻】

相關(guān)期刊論文 前10條

1 沈新福;呂振北;梁慶慶;;復摻礦物摻和料混凝土抗?jié)B和抗碳化性能研究[J];筑路機械與施工機械化;2016年10期

2 李燕軍;張美珍;牛寧;;礦物摻和料對混凝土抗?jié)B和抗碳化性能影響的研究[J];中北大學學報(自然科學版);2016年03期

3 薛元;曾曉輝;O莆，

本文編號：2262256