摘要
通过试验研究了轻骨料混凝土的耐高温性能,并与普通混凝土做比较,从残余强度入手,分析高温下混凝土性能的变化规律和机理,并给出了建议的计算公式;用有限元方法对轻骨料混凝土耐高温性能进行分析。结果表明:①统计给出的高温后轻骨料混凝土残余强度曲线的公式与试验结果吻合良好。②全轻骨料混凝土耐高温最好,砂轻骨料混凝土次之,普通骨料混凝土最差。③高温后轻骨料混凝土颜色发生改变,质量发生损失。该结论为轻骨料混凝土在高温环境下的应用提供技术依据。
Researched the high-temperature properties of lightweight aggregate concrete though experimental, and compared with the ordinary concrete, starting from the residual strength to analysis of the changes in laws and mechanism about concrete under high temperature performance, and given the proposed formula for calculating;and analysis on the high-temperature performance of the lightweight aggregate concrete using finite element method.The results show that： （1）The lightweight aggregate concrete after high temperature residual strength curve formula which Statistics given are in good agreement with the experimental results. （2）The best high temperature of all-lightweight aggregate concrete, followed by sand lightweight aggregate concrete,the worst of ordinary aggregate concrete. （3）After high temperature the lightweight aggregate concrete have changed in color and lossed in quality.This conclusion provide technical basis for the application of lightweight aggregate concrete in the high-temperature environment.
出处
《混凝土》
CAS
CSCD
北大核心
2011年第7期23-26,共4页
Concrete
基金
山东省高等学校科技计划项目(J09LE51)
关键词
轻骨料混凝土
高温作用
残余强度
有限元分析
lightweight aggregate concrete
high temperature effect
residual strength
finite element analysis
