摘要
为探究粉煤灰-矿渣-电石渣再生混凝土(CSFSRAC)的力学性能,采用电石渣(CS)、粉煤灰(FA)与矿渣(S)制备胶凝材料,结合再生粗骨料(RA),制备CSFSRAC,设计了不同RA取代率与不同胶凝材料掺量的棱柱体试件,进行单轴受压试验,分析其破坏形态与应力-应变关系曲线,并建立CSFSRAC本构关系模型。结果表明,随着RA取代率的增加,CSFSRAC的峰值应力与弹性模量明显下降,破坏呈现的脆性特征也更为显著;而胶凝材料掺量对CSFSRAC应力-应变关系曲线的特征指标影响较小,FA与S质量比为4∶6时其力学性能最好。建立了考虑RA取代率的CSFSRAC单轴受压本构模型,计算结果与试验结果吻合良好,可较好地描述该材料的本构关系。
In order to investigate the mechanical properties of fly ash-slag-carbide slag recycled concrete(CSFSRAC),cementitious materials were prepared by using carbide slag(CS),fly ash(FA)and slag(S)combined with recycled coarse aggregate(RA)to prepare CSFSRAC,and prismatic cylindrical specimens with different RA substitution rates and different cementitious material admixtures were designed.The uniaxial compression test was carried out to analyze the damage pattern and stress-strain relationship curves,and the CSFSRAC constitutive relationship model was established.The results show that with the increase of RA substitution rate,the peak stress and Young's modulus of CSFSRAC decreased significantly,and the brittle characteristics of damage were more significant.The effect of cementitious material dosage on the characteristic indices of the stress-strain relationship curve of CSFSRAC is small,and the mechanical properties are best when the dosage ratio of FA to S mass is 4∶6.The uniaxial compression constitutive model of CSFSRAC considering the substitution rate of RA was established,and the calculation results are in good agreement with the test results,which can better describe the constitutive relationship of the material.
作者
张逸超
朱文博
房延凤
周崇辉
ZHANG Yichao;ZHU Wenbo;FANG Yanfeng;ZHOU Chonghui(School of Civil Engineering,Shenyang Jianzhu University,Shenyang 100168,China;School of Materials Science and Engineering,Shenyang Jianzhu University,Shenyang 100168,China;School of Civil Engineering and Architecture,Jiamusi University,Jiamusi 154007,Heilongjiang,China)
出处
《材料导报》
北大核心
2025年第S2期454-459,共6页
Materials Reports
基金
辽宁省高等学校基本科研项目(LJ212410153024)
国家自然科学基金(52378252)。
关键词
再生混凝土
碱激发
应力-应变关系曲线
本构模型
recycled concrete
alkali activation
stress-strain relationship curve
constitutive model
