摘要
轻集料混凝土已在结构工程中得到广泛应用,轻集料表面状态、形状和吸水性对轻集料混凝土需水量和工作性能有很大影响。试验结果表明:表面憎水处理的膨胀页岩陶粒早期和后期的吸水率明显降低。相比干燥和预湿轻集料配制的混凝土,坍落度相同时,采用表面憎水处理的轻集料配制的混凝土的需水量较少,且具有较低的坍落度损失和更高的抗压强度。
Lightweight aggregate concrete is being more widely used in construction. The surface texture, shape, and water absorption of lightweight aggregate have an effect on the water demand and rheological properties of lightweight aggregate concrete. The results indicate that surface treatment of expanded shale lightweight aggregate with a hydrophobic surface, decreases the water adsorption of the aggregate at early and later ages. The concrete with the surface-treated lightweight aggregate requires less water than that containing dry or pre-saturated untreated expanded shale for a given slump. Also, the former shows less slump loss and higher compressive strength than the latter.
出处
《硅酸盐学报》
EI
CAS
CSCD
北大核心
2008年第1期54-60,共7页
Journal of The Chinese Ceramic Society
基金
重庆市科技计划(CSTC2007AB7043)资助项目。
关键词
轻集料
表面处理
吸水
混凝土
lightweight aggregate
surface treatment
water adsorption
concrete
