磨细矿渣粉、膨胀剂、纤维对水泥混凝土抗裂性的影响研究  

Investigation for Influence of Pulverized Slag,Expanding Agent and Fiber on Anti-cracking Performance of Cement Concrete

作　　者：刘颖[1] 薛昕 郝增恒[1] 张毅[3] 

机构地区：[1]招商局重庆交通科研设计院有限公司,重庆400067 [2]重庆市智翔铺道技术工程有限公司,重庆401336 [3]重庆交通大学,重庆400074

出　　处：《公路交通技术》2010年第1期27-30,共4页Technology of Highway and Transport

摘　　要：通过室内试验和微观试验分别研究磨细矿渣粉、膨胀剂和纤维对水泥混凝土力学性能、收缩性能以及混凝土内部结构产生的影响。研究结果表明,磨细矿渣粉与膨胀剂能够提高混凝土的致密性,防止混凝土早期开裂;纤维分散在混凝土中形成三维网络支撑体系,可增加混凝土的韧性,提高其抗裂性;此3种材料的共同使用对混凝土性能有互补作用。This paper investigates the influences of pulverized slag, expanding agent and fiber on mechanical properties, shrinkage properties and internal structure of cement concrete via indoor test and microscopic test, respectively. The results of investigation show that the pulverized slag and expanding agent can improve the compactness of concrete and prevent early cracking; the fiber disperses in concrete and forms a 3-dimensional network supporting system so as to increase the ductility and enhance crack resistance of concrete; and the concurrent use of these three materials plays a complementary action for concrete performance.

关 键 词：混凝土 抗裂性 磨细矿渣粉 膨胀剂 纤维 

分 类 号：U414[交通运输工程—道路与铁道工程]