青藏铁路低温早强混凝土抗压强度试验研究  

Experimental Study of Compressive Strength of Early-Strength Concrete Cured under Low Temperatures for Qinghai-Tibet Railway

作　　者：谢友均[1] 刘伟[1] 刘宝举[1] 冯星[1] 

机构地区：[1]中南大学土木建筑学院,湖南长沙410075

出　　处：《桥梁建设》2003年第2期27-30,共4页Bridge Construction

基　　金：铁道部科技发展计划项目(2001G005)

摘　　要：试验研究了高效减水剂、引气剂、早强剂和矿物掺合料对低温养护(-2℃±2℃)混凝土抗压强度的影响。试验结果表明:在混凝土中双掺复合外加剂和矿物掺合料,不仅有利于低温养护混凝土早期强度发展,而且较大幅度提高了混凝土后期强度,并可显著改善混凝土的耐久性。The influences of superplasticizer, air entrainer, accelerator and mineral additives upon the compressive strength development of the concrete cured under low temperatures(2±2) ℃ are experimentally studied. The experimental results show that adding of both the composite chemical admixtures and mineral additives to the concrete is not only helpful to the early strength development of the concrete cured under low temperatures, but also can greatly increase the later strength of the concrete, and will remarkably improve the durability of the concrete.

关 键 词：早强混凝土 低温养护 外加剂 掺合料 抗压强度 耐久性 试验研究 青藏铁路 

分 类 号：U214.18[交通运输工程—道路与铁道工程]