机制砂混凝土的酸雨中性化  

Neutralization of artificial sand concrete caused by acid rain

作　　者：苏卿[1] 

机构地区：[1]武昌理工学院,湖北武汉430223

出　　处：《新型建筑材料》2013年第6期16-19,共4页New Building Materials

基　　金：交通部西部项目(200631822302)

摘　　要：对碳化及酸雨与碳化复合作用下,机制砂混凝土、河砂混凝土的碳化深度进行对比。结果表明,碳化或酸雨与碳化复合作用下,混凝土的碳化深度随强度等级提高而降低,且机制砂混凝土的碳化深度均小于同强度等级的河砂混凝土;与单一碳化相比,酸雨与碳化复合作用时,由于酸雨中H+和SO42-的共同影响,加速了混凝土中性化进程。With the effect of carbonation and combining action of acid rain and carbonation,the carbonation depth of concrete with river sand and artificial sand was studied,respectively. The results show that with the effect of carbonation and combined action of acid rain and carbonation,the carbonation depth of concrete lowered with the increase of strength level,and the carbonation depth of artificial sand concrete is less than that of concrete with river sand of the same strength level. Compared with single car- bonation,the neutralization of concrete was accelerated under the combined action of H＋ and SO42- in acid rain.

关 键 词：机制砂 酸雨 混凝土 中性化 碳化深度 

分 类 号：TU528[建筑科学—建筑技术科学]