摘要
抗冲磨混凝土(Abrasion Resistant Concrete)的抗裂性在学术上研究得较少。研究认为针对高水头、高速挟沙水流,抗冲磨混凝土的抗裂性应作为主要耐久性指标。为此设计了一系列不同配合比的抗冲磨混凝土,以脆性系数、干缩率2种指标,探讨了粉煤灰和硅粉对抗冲磨混凝土抗裂性能的影响。结果表明:在掺20%FA、20%FA+(5%、8%、10%)SF的水泥胶凝材料浆体中,脆性系数与干缩率较小,水化产物以水化硅酸钙占主体,浆体结构致密,充分说明粉煤灰和硅粉可优化浆体结构,对提高抗冲磨混凝土的抗裂性有利。
Little research has been done on the crack resistance of abrasion resistant concrete. Studies suggest that for high head and high- speed sediment-laden flow, the crack resistance of abrasion resistant concrete should be the principal indicators of durability. This paper designs a series of abrasion resistant concrete with different mixing ratios, using brittleness index and shrinkage rate are used to study the effect of fly ash and silicon powder on abrasion resistant concrete. The results show that doped 20% FA, 20% FA ＋ （ 5%, 8%, 10% ） SF of cement binder slurry, brittleness index and shrinkage rate are small, hydration products account for most of C-S-H phases, paste compact, fully illustrate auxiliary cementing material optimization slurry structure, improve the transition region, so as to improve the crack resistance of abrasion resistant concrete.
出处
《中国农村水利水电》
北大核心
2017年第9期164-168,172,共6页
China Rural Water and Hydropower
基金
国家大坝安全工程技术研究中心项目(2410100032)
关键词
抗冲磨混凝土
抗裂性
脆性系数
干缩率
abrasion resistant concrete
crack resistance
brittleness index
shrinkage rate
