早强微膨胀道路快速修补水泥基材料的研究  

Exploitation of rapid repair materials and research on properties-a micro-expansion early strength high performance concrete

作　　者：丁庆军[1] 李宏斌 黄遵鹏 DING Qingjun;LI Hongbin;HUANG Zunpeng(State Key Laboratory of Silicate Materials for Architectures,Wuhan University of Technology,Wuhan 430070,China)

机构地区：[1]武汉理工大学硅酸盐工程中心国家重点实验室,湖北武汉430070

出　　处：《混凝土》2018年第9期81-84,共4页Concrete

基　　金：国家重点研发计划("十三.五"计划)(2017YFB0310105)

摘　　要：针对水泥混凝土路面深层破坏,如交叉裂缝、破碎板、坑槽等严重病害的问题,在探明了硫铝酸盐水泥与硅灰复配、砂率等因素对混凝土工作性能、力学性能和体积稳定性能的影响规律基础上,通过复配缓凝早强组分,制备出了早强微膨胀高性能混凝土。在修补路面的时候,可局部或全部破除混凝土面板,采用该早强微膨胀高性能混凝土进行局部或板块修补。其配合比为:水泥∶硅灰∶砂∶石∶水=500∶50∶744∶987∶165。初始坍落度≥220 mm,扩展度≥480 mm,1h扩展度≥340 mm,4 h抗压强度≥35 MPa,28 d抗压强度≥65 MPa,28 d膨胀率78×10^(-6)。Aimed at solving the serious problem of the deeply damage about the cement concrete pavement such as cross cracks,potholes,broken plate.Based on the sulphate aluminium cement and silica fume complex,sand ratio and other factors on the concrete work performance,the mechanical properties and the volume of stable performance is ascertained,complex retarded early strength component to prepare a micro-expansion early strength high performance concrete.During mending roads,we can use this micro-expansion early strength high performance concrete after breaking the concrete panels partially or totally.The mix proportion is that:cement∶silica fume∶sand∶stone∶water=500∶50∶744∶987∶165∶60.Initial slump degree≥220 mm,extension degree≥480 mm,1h extension degree≥340 mm,4 h compression strength≥35 MPa,28 d compression strength≥65 MPa,28 d degree of free swelling is 78×10-6.

关 键 词：快速修补 早强 微膨胀 抗压强度 膨胀率 

分 类 号：TU528.042[建筑科学—建筑技术科学]