酸性环境下自燃煤矸石混凝土耐久性试验研究  

Experimental Study on Durability of the Coal Gauge Concrete under Acidic Environment

作　　者：刘世[1] 刘海卿[1] 

机构地区：[1]辽宁工程技术大学土木工程学院,辽宁阜新123000

出　　处：《非金属矿》2018年第2期85-87,共3页Non-Metallic Mines

基　　金：国家自然科学基金(U1261122);辽宁省科学事业公益研究基金(2015004019)

摘　　要：为研究酸性环境作用对自燃煤矸石混凝土耐久性的影响,首先将自燃煤矸石混凝土试件分别放置在3种不同p H值的酸性溶液中进行腐蚀,然后参照ASTM C1585规范中的吸水试验方法,对自燃煤矸石部分替代传统粗骨料的混凝土试件水分传输能力进行试验,分析溶液p H值的变化规律,比较了酸性环境腐蚀和煤矸石掺量对试件吸水指标(累积吸水高度和两阶段吸水率)的影响。结果表明:随着浸泡时间的增长,酸性溶液的p H值逐渐增大;酸性环境腐蚀对自燃煤矸石混凝土的水分传输能力有明显影响,p H值越小,试件吸水指标增加越显著。另外,随着自燃煤矸石替代传统粗骨料量的增加,试件吸水指标亦不同程度提高。In order to investigate the influence of acidic environment on the durability of the coal gangue concrete, the specimens were placed in the acidic solution with three kinds of pH value, and then water absorption test was conducted based on ASTM C 1585. The variation of the pH value was analyzed, and the effect of the acidic environment and the content of the coal gangue aggregates on the indexes （the cumulative water absorption, initial rate of absorption and the second rate of absorption ） of water absorption were compared. The results showed that the pH value increased with the growth of time, the water transport properties of the coal gauge concrete was obviously influenced by the acidic environment, and the indexes of the water absorption increased with the decreasing of the pH value. In addition, with increasing of the coal gangue aggregates dosage, the indexes of the water absorption also increased.

关 键 词：自燃煤矸石 混凝土 酸性腐蚀 水分传输 耐久性 

分 类 号：TU528[建筑科学—建筑技术科学]