石灰石粉对浮石混凝土力学性能和微观结构的影响  

Influence of Limestone Powder on Mechanical Property and Microstructure of Pumice Concrete

作　　者：高矗 申向东[1] 王萧萧[1] 张通[1] 

机构地区：[1]内蒙古农业大学水利与土木建筑工程学院,呼和浩特010018

出　　处：《硅酸盐通报》2014年第7期1583-1588,共6页Bulletin of the Chinese Ceramic Society

基　　金：内蒙古自治区应用与研究开发科技计划项目(20130425);内蒙古自治区自然科学基金项目(2013MS0720);"十二五"农村领域国家科技计划课题(2011BAD29B03);高等学校博士学科点专项科研基金(20121515110002);内蒙古自治区2013年博士研究生科研创新项目(B20131012904Z)

摘　　要：以天然浮石作为粗骨料,通过内掺0%、10%、20%、30%和40%质量分数的石灰石粉替代相同质量的水泥配制浮石混凝土,研究不同掺量石灰石粉对浮石混凝土抗压强度和劈裂抗拉强度的影响,并借助扫描电镜观察分析混凝土微观结构。结果表明:石灰石粉掺量为10%时,浮石混凝土各龄期力学性能显著提高;石灰石粉可加速水泥早期水化,提高水泥石基体和浮石-水泥石界面过渡区密实度;石灰石粉具有后期水化活性。With natural pumice as coarse aggregate, by mixing 0%, 10%, 0%, 30% and 40% mass fraction of limestone powder to replace the same weight of cement to configure pumice concrete, the influence of the different dosage of lime stone powder on the pumice concrete compressive strength and splitting tensile strength was studied. The microstructure of pumice concrete was analysed with the aid of scanning electron microscope. The experimental results show that mechanical properties of the pumice concrete can be largely improved by mixing 10% mass fraction of limestone powder. Limestone powder can accelerate the early hydration of cement, increase cement matrix and pumice-cement interface transition zone compactness. Limestone powder has the hydration reactivity of later period.

关 键 词：浮石混凝土 石灰石粉 力学性能 微观结构 

分 类 号：TU528[建筑科学—建筑技术科学]