补偿收缩钢渣混凝土应力-应变关系试验

发布时间：2018-05-22 19:39

本文选题：补偿收缩 + 钢渣混凝土　；参考：《建筑材料学报》2017年04期

【摘要】：以废弃钢渣为粗骨料制备补偿收缩钢渣混凝土试件,并对其进行抗压强度、弹性模量及泊松比试验,分析了水灰比对补偿收缩钢渣混凝土试件破坏形态、抗压强度、变形及应力-应变关系的影响.结果表明:补偿收缩钢渣混凝土试件破坏形态与普通混凝土相似,但前者出现裂缝时间较晚,裂缝发展速度较快,峰值应变较小;随着水灰比的减小,补偿收缩钢渣混凝土试件的抗压强度逐渐增大,弹性模量先增后减;补偿收缩钢渣混凝土试件的变形、应变和弹性模量均小于普通混凝土,泊松比是普通混凝土的2~3倍.由于补偿收缩钢渣混凝土内部含有的缺陷和空隙较少,其应力-应变关系曲线的线性阶段较长,曲线反弯点不明显.基于补偿收缩钢渣混凝土试验结果,提出了补偿收缩钢渣混凝土峰值应力、峰值应变、弹性模量和泊松比的计算方法,建立了补偿收缩钢渣混凝土应力-应变关系模型,此模型计算结果与试验结果吻合较好.
[Abstract]:The concrete specimens with compensated shrinkage were prepared by using waste steel slag as coarse aggregate. The compressive strength, elastic modulus and Poisson's ratio were tested, and the failure mode and compressive strength of concrete specimens with water-cement ratio were analyzed. Effect of deformation and stress-strain relationship. The results show that the failure pattern of steel slag concrete with compensating shrinkage is similar to that of ordinary concrete, but the cracking time of the former is relatively late, the crack development speed is faster, the peak strain is smaller, and the ratio of water to cement decreases with the decrease of water-cement ratio. The compressive strength of steel slag concrete specimen increased gradually, the elastic modulus first increased and then decreased, and the deformation, strain and elastic modulus of compensating shrinkage steel slag concrete specimen were smaller than that of ordinary concrete, and Poisson's ratio was 2 ~ 3 times of that of ordinary concrete. Because there are less defects and voids in the concrete with compensating shrinkage, the linear stage of stress-strain relationship curve is longer, and the inverse bending point of the curve is not obvious. Based on the experimental results of compensating shrinkage steel slag concrete, the calculation method of peak stress, peak strain, elastic modulus and Poisson's ratio of compensating shrinkage steel slag concrete is put forward, and the stress-strain relation model of compensating shrinkage steel slag concrete is established. The calculated results of this model are in good agreement with the experimental results.
【作者单位】：安徽工业大学建筑工程学院;
【基金】：国家自然科学基金资助项目(51608003) 安徽省教育厅重大科学研究项目(KJ2015ZD10) 安徽省重点研究与开发计划项目(1704a0802131) 安徽省自然科学基金资助项目(1208085QE88) 安徽省高校优秀青年人才支持计划重点项目(gxygZD2016072) 马鞍山市科学技术项目(马科,2012(6))
【分类号】：TU528

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