CCCW改善混凝土高温灼烧后强度的试验研究  

Experimental Investigation on Strength Improvements After Burning at High Temperature of CCCW Modified Concrete

作　　者：尚晓华 敬登虎[2] 邵凯华 SHANG Xiaohua;JING Denghu;SHAO Kaihua(Shandong Luneng Genfu Development Co.,Ltd.,Jinan,Shandong 250000,China;School of Civil Engineering,Southeast University,Nanjing,Jiangsu 210096,China)

机构地区：[1]山东鲁能亘富开发有限公司,山东济南250000 [2]东南大学土木工程学院,江苏南京210096

出　　处：《水利与建筑工程学报》2019年第1期61-66,共6页Journal of Water Resources and Architectural Engineering

基　　金：国家十二五科技支撑计划项目(2012BAJ14B02)

摘　　要：为了探讨水泥基渗透结晶型防水材料(CCCW)改善混凝土性能的适用性,通过微观结构性能试验以及力学性能试验来分析CCCW对高温灼烧后混凝土的修复效果。研究结果表明:对于不同工况下的混凝土,高温灼烧混凝土表面涂刷CCCW后,其强度均有不同程度的提高,且提高程度与灼烧温度以及冷却方式有关;CCCW密实混凝土机理:通过渗透结晶作用生成不溶性结晶体填充在混凝土内部微裂缝中;CCCW的渗透结晶深度在20 mm左右;CCCW能够降低高温灼烧混凝土的中性层深度,提高混凝土抵抗外界有害物质侵蚀的能力。In order to investigate the applicability of cementitious capillary crystalline waterproofing materials(CCCW) applied to improve concrete properties. The repairing effect of CCCW on concrete after high temperature burning is analyzed by means of micro-structure performance test and mechanical property test. The research results show that under different conditions, the strength of CCCW modified concrete after high temperature burning, is improved in different degree, the increase is related with the high temperature and cooling mode;the mechanism behind this phenomenon is that insoluble crystals formed by infiltration crystallization are filled in microcracks in concrete, and the osmotic crystallization depth is about 20 mm, therefore CCCW can reduce the neutral layer depth of concrete after high temperature and improve the ability of concrete to resist the erosion of harmful substances.

关 键 词：水泥基渗透结晶型防水材料 高温 混凝土强度 扫描电子显微镜 渗透结晶深度 

分 类 号：TU528[建筑科学—建筑技术科学]