摘要
为了减少废弃混凝土对生态环境的不利影响,使用废弃混凝土制备了再生混凝土(再生骨料替代率为50%),同时为了研究再生混凝土在复杂环境中的应用前景,将再生混凝土在早龄期受力(龄期≤7 d)和硫酸盐腐蚀的力学响应作为研究对象,分析受力时间、受力大小、硫酸盐溶液浓度等因素对再生混凝土抗压强度的影响,研究结果表明:再生混凝土在龄期≤3 d前受力、受力大小超过当时混凝土抗压强度的50%以及硫酸盐溶液浓度超过5%均会对再生混凝土后期的力学性能造成不利影响,导致混凝土力学性能的下降。
In order to reduce the adverse impact of waste concrete on the ecological environment,it uses recycled concrete to prepare recycled concrete(recycled aggregate replacement rate is 50%),and in order to study the application prospect of recycled concrete in complex environment,it will regenerate concrete in early age.The mechanical response of period stress(≤7 d)and sulfate corrosion was studied as the research object.The effects of stress time,force size and concentration of sulfate solution on compressive strength,deformation performance and splitting strength of recycled concrete were analyzed.The research results show that the stress of the recycled concrete before the age of≤3 d,the force exceeding 50%of the concrete compressive strength at that time and the concentration of the sulphate solution exceeding 5%will adversely affect the mechanical properties of the recycled concrete in the later period,resulting in the decline in the mechanical properties of concrete.
作者
张玉栋
胡建林
周小龙
赵玉婕
ZHANG Yudong;HU Jianlin;ZHOU Xiaolong;ZHAO Yujie(Hebei Key Laboratory for Diagnosis,Reconstruction and Anti-disaster of Civil Engineering,Hebei University of Architecture,Zhangjiakou 075000,China;Zhangjiakou City Vocational and Technical Education Center,Zhangjiakou 075000,China)
出处
《混凝土》
CAS
北大核心
2021年第10期27-30,共4页
Concrete
基金
国家自然科学基金青年基金(U1334209)
河北省教育厅青年基金项目(QN2020191)
河北省高等学校科学技术研究项目(Z2018203)。
关键词
再生混凝土
硫酸盐腐蚀
早龄期受力
力学性能
recycled concrete
sulfate corrosion
early age stress
mechanical properties
作者简介
第一作者:张玉栋(1986-),男,讲师,硕士,研究方向:混凝土及智能材料。联系地址:河北省张家口市河北建筑工程学院行政楼A112(075000),联系电话:15830337876。
