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以C60混凝土破碎、筛分成再生骨料配置C30、C40、C50混凝土为试验对象,研究机制砂石粉含量变化对再生混凝土抗氯离子渗透性能影响.研究结果表明,C40、C50混凝土石粉含量在8%左右,C30混凝土石粉含量在12%左右,抗氯离子渗透性能最佳,并从微观角度给出了石粉对不同强度等级再生混凝土抗氯离子渗透性能作用机理.同时,通过对氯离子渗透系数时变规律的研究,给出了C30~C50再生混凝土氯离子渗透系数的拟合公式.
C60 concrete was crushed and sieved into regenerated aggregate.C30, C40 and C50 concrete were used as experimental objects to study the influence of the content of mechanical gravel powder on the resistance to chloride ion permeability of recycled concrete.The results show that the content of C40 and C50 concrete powder is about 8% , The content of C30 concrete powder is about 12% and the resistance to chloride ion penetration is the best, and the action mechanism of stone powder on the resistance to chloride ion permeability of recycled concrete with different strength grades is given from the microscopic point of view.At the same time, when the chloride ion permeability coefficient Variations of the law, given C30 ~ C50 recycled concrete chloride ion permeability coefficient fitting formula.