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约束条件下高性能混凝土的早期开裂
引用本文:巴恒静,高小建.约束条件下高性能混凝土的早期开裂[J].混凝土,2002(5):3-6.
作者姓名:巴恒静  高小建
作者单位:哈尔滨工业大学材料学院,黑龙江,哈尔滨,150006
基金项目:国家自然科学基金资助项目 批准号 5 0 0 780 19
摘    要:早期收缩开裂是高性能混凝土,特别是大流动度混凝土施工应用中经常出现的质量通病。这种裂缝的产生主要与混凝土配合比、养护条件及混凝土所处约束条件有关。本文对掺硅灰、粉煤灰等矿物掺合料的高性能混凝土在约束条件下的早期开裂进行试验研究。结果表明:掺硅灰加剧了混凝土的早期开裂;优质磨细粉煤灰的加入对混凝土早期开裂有一定的抑制作用。

关 键 词:约束条件  高性能混凝土  早期开裂  硅灰  磨细粉煤灰
文章编号:1002-3550(2002)05-0003-04
修稿时间:2002年1月7日

Restrained craking tendency of HPC at early age
BA Heng jing,GAO Xiao jian.Restrained craking tendency of HPC at early age[J].Concrete,2002(5):3-6.
Authors:BA Heng jing  GAO Xiao jian
Abstract:Shrinkage cracking at early age always occured during construction and application of HPC,especially high slump concrete.This kind of cracking is mainly influenced by mixture proportions,curing conditions and restrained conditions of concrete.In this paper,restrained cracking of HPC with silica fume or fly ash at early age were tested and studied.The results indicated that the addition of silica fume increased cracking of HPC at early age,and the addition of finely ground fly ash with high quality decreased this cracking to a certain extent.
Keywords:high performance concrete  cracking at early age  silica fume  finely  ground fly ash  
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