基于内养护原理的功能集料制备及在混凝土中的应用  

Preparation of Functional Aggregate Based on Internal Curing Theory and Its Application in Concrete

作　　者：杨进[1,2] 朱航[2] 何捷[3] 刘云鹏[2] 

机构地区：[1]武汉理工大学材料科学与工程学院,武汉430070 [2]武汉理工大学硅酸盐建筑材料国家重点实验室,武汉430070 [3]中国建筑材料科学研究总院,北京100000

出　　处：《武汉理工大学学报》2015年第9期21-24,31,共5页Journal of Wuhan University of Technology

基　　金：国家科技支撑计划子课题:农村固体废弃物再生利用研究与产品开发(2014BAL03B01-01)

摘　　要：以陶砂为内养护介质吸附激发剂溶液制备功能集料,并与SAP内养护材料吸附激发剂溶液进行对比,固定内养护引入水量,水灰比及激发剂掺量,研究内养护技术对大掺量粉煤灰混凝土抗压强度,干燥收缩,水化热及微观结构的影响。水化热测试及微观形貌测试表明,内养护与激发剂相结合可同时促进水泥及粉煤灰的水化。抗压强度测试及干燥收缩测试表明,混凝土的60 d抗压强度提高16.5%,60 d干燥收缩降低21%,较好地改善了大掺量粉煤灰混凝土早期强度低,养护依赖性大的问题。Light weight sand absorbing with the activator solution was used to prepare functional aggregate,compared with presoaked superabsorbent polymers with the activator solution. The entrained water content,w / c ratio and activator content were fixed in the study,the influences of internal curing on compressive strength,drying shrinkage,hydration heat and microstructure of high volume fly-ash concrete were investigated. The results of hydration heat and microstructure indicate that dual role of internal curing and alkali-activation promotes the hydration of cement and fly-ash. The 60 d compressive strength improved by 16.5%,and the 60 d drying shrinkage decreased by 21%,which indicates that coupling of internal curing and alkali-activation can solve the low-strength and high-shrinkage problem of high volume fly-ash concrete very well.

关 键 词：大掺量粉煤灰混凝土 高吸水树脂 陶砂 抗压强度 水化 干燥收缩 

分 类 号：TU528.04[建筑科学—建筑技术科学]