砂浆在不同介质干湿循环作用下的劣化特性  

Degradation Characteristics of Cement Mortar under Dry-Wet Cycles of Different Media

作　　者：王萧萧[1] 王岚[1] 刘成武 王利强[1] WANG Xiao-xiao;WANG Lan;LIU Cheng-wu;WANG Li-qiang(School of Civil Engineering,Inner Mongolia University of Technology,Hohhot 010051,China)

机构地区：[1]内蒙古工业大学土木工程学院,呼和浩特010051

出　　处：《硅酸盐通报》2018年第12期3812-3815,共4页Bulletin of the Chinese Ceramic Society

基　　金：2015年内蒙古自治区科技创新引导基金项目

摘　　要：为探讨水、传统融雪剂、环保融雪剂对道路材料的影响,采用干湿循环试验方法研究三种不同介质对水泥砂浆质量损失的影响,借助超景深三维显微镜、X射线衍射试验手段进行损失机理分析。结果表明,三种介质下水泥砂浆的质量损失率大小关系为:传统融雪剂>水>环保融雪剂;通过消耗Ca(OH)_2,传统融雪剂侵蚀后生成以Friedel盐腐蚀结晶物,侵蚀主要集中在水泥砂浆原有孔洞和试样表面;环保融雪剂侵蚀后生成少量弱有害离子CO_3^(2-),损伤主要以集中在试样的原有空洞。To investigate the influence of water,traditional snow-melting agent and environment-friendly snow-melting agent on road materials,the effects of three different media on quality loss of cement mortar were studied by dry-wet cycle test method.The loss mechanism was analyzed using super depth-of-field 3D microscope and X-Raydiffraction.The results show that the mass loss rate of cement mortar under three kinds of media is as follow:traditional snow-melting agent>water>environment-friendly snow-melting agent.Crystals,mainly made of Friedel salt,are produced by consuming Ca(OH)2 after traditional snow-melting agent erosion,with erosion concentrating on the original pores and sample surface of cement mortar.A small amount of weak-harmful ions CO3^2-are generated after environment-friendly snow-melting agent erosion,with damage mainly locating in the original pores of the sample.

关 键 词：干湿循环 质量损失 超景深 X射线衍射试验 

分 类 号：TU528[建筑科学—建筑技术科学]