摘要
研究了水泥基材料真实裂隙表面在水流动过程中开裂表面的溶蚀特性,建立了裂隙表面在水流作用下的钙离子迁移和表面溶蚀速率模型。利用浸泡法和裂隙渗流装置对裂隙试件进行静态和动态溶蚀行为的试验研究,根据试验结果和理论模型回归了描述静态和动态溶蚀速率,并针对裂隙表面进行了溶蚀前后的粗糙度分析。结果表明:裂隙表面在流动水作用下的溶蚀速率显著大于静水中的溶蚀速率;水流对净浆表面和砂浆表面的溶蚀速率的影响不同;表面溶蚀过程减小了净浆表面的粗糙度但加大了砂浆表面的粗糙度。
The surface leaching behavior of fractured surfaces of cement-based materials was investigated.Modeling of calcium ion transport and surface leaching rate was established through advection-dispersion equation of solute transport in fractures.Then the static and dynamic leaching behaviors were studied through immersion test and fracture infiltration test.The surface leaching rates were regressed from the experimental data.Moreover the surface roughness was investigated for fracture surfaces before and after leaching tests.The results show that the surface leaching is substantially increased by water flow.The influence of water flow on sur-face leaching rate is different for paste and mortar surfaces,and surface leaching decreases the roughness of paste surface but in-creases the roughness of mortar surfaces.
出处
《硅酸盐学报》
EI
CAS
CSCD
北大核心
2011年第3期525-530,共6页
Journal of The Chinese Ceramic Society
基金
国家自然科学基金(50608048)
国家“973”计划(2009CB-623106)资助项目
关键词
水泥基材料
裂隙表面
静态溶蚀
动态溶蚀
粗糙度
cement-based materials
fracture surface
static leaching
dynamic leaching
surface roughness
