高强混凝土脆性及其改善措施研究  

STUDY ON BRITTLENESS OF HIGH STRENTGTH CONCRETE AND ITS IMPROVING MEASURES

作　　者：冷发光[1] 郭向勇[1] 丁威[1] 张仁瑜[1] 李章建 李昕成 纪宪坤[1] 

机构地区：[1]中国建筑科学研究院建筑材料研究所 [2]云南建工集团混凝土有限公司

出　　处：《建筑技术开发》2008年第10期54-56,共3页Building Technology Development

基　　金：科技部科研院所技术开发研究专项(2003EGl31152);云南省省院省校科技合作计划项目(2004YX31)

摘　　要：研究了采用普通骨料和机制砂配制的 C60和 C80高强混凝土的脆性特征及其改善措施。结果表明,混凝土中掺加活性掺合料和纤维都能够提高混凝土的抗裂性能;钢纤维与聚丙烯纤维混合掺入混凝土中,其增韧效果明显优于单独使用;随着混凝土强度提高,混凝土脆性变大,同种增韧材料的增韧效果有下降的趋势。The brittleness and improving measures for high strength concretes of C60 and C80 were studied. The concretes were made by manufactured sand and normal aggregates. The results show that the brittleness of concrete can be improved by adding fiber or admixtures. The effect is better when using steel fiber and polypropylene fiber together rather than using alone. The brittleness of concrete gets worse and the improving effect of the same material decreases as the strength of concrete increases.

关 键 词：高强混凝土 脆性 纤维 掺合料 

分 类 号：TU528.31[建筑科学—建筑技术科学]