自燃煤矸石粉对混凝土耐久性的影响  

Impact of Self-ignited Coal Gangue Powder on the Durability of Concrete

作　　者：王栋民[1] 王剑锋[1] 范兴旺[1] 李端乐[1] 唐官保[1] 

机构地区：[1]中国矿业大学(北京)化学与环境工程学院混凝土与环境材料研究所,北京100083

出　　处：《硅酸盐通报》2013年第5期839-843,共5页Bulletin of the Chinese Ceramic Society

基　　金：中央高校基本科研业务费专项资金项目(2009KH09);国家科技支撑计划(2009BAB48B02);高等学校博士学科点专项科研基金(20120023110011)

摘　　要：从抗氯离子渗透性能、抗碳化性能、以及干缩性能三个方面研究了自燃煤矸石粉对混凝土耐久性能的影响。研究发现:掺自燃煤矸石粉混凝土的抗氯离子渗透能力较高;当煤矸石粉掺量在20%时,对混凝土的碳化略有改善,当混凝土强度大于50 MPa,煤矸石掺量小于40%时,其碳化深度小于8 mm;随胶凝材料的增加,混凝土干缩增大,当自燃煤矸石粉掺量为20%时,混凝土干缩值最小。The effect of self-ignited coal gangue powder on durability of concrete was investigated from the resistance to chloride ion permeability,carbonation resistance and drying shrinkage properties.The research results showed that,for the concrete mixed with self-ignited coal gangue,the ability of resisting to chloride ion is higher;when the dosage of coal gangue is 20%,the influence on the carbonation of concrete is improved slightly;when the strength of concrete is greater than 50 MPa and the dosage of coal gangue is less than 40%,the carbonization depth is less than 8 mm.With the increase of cementitious material,the shrinkage of gangue concrete increases.At the 20% dosage of self-ignited coal gangue powder,the drying shrinkage value of concrete is minimum.

关 键 词：自燃煤矸石 混凝土 耐久性 抗氯离子渗透 抗碳化 

分 类 号：TU528[建筑科学—建筑技术科学]