摘要
以胶凝材料体系的多元复合技术为基础,重点研究了再生细骨料混凝土抗压强度与胶凝材料总量、胶水比之间的线性关系,并在不同强度等级要求下对其配合比进行优化处理,从而实现再生细骨料的最大化工程应用。试验结果表明,再生细骨料混凝土的28 d抗压强度相比普通混凝土最大差值可达到11.6 MPa,其力学性能要差于普通混凝土,且各个养护龄期的抗压强度均随着胶凝材料总量或胶水比的增大而逐渐升高,均呈现出较好的线性关系;优化后的各个系列配合比可制备强度等级C20~C40的再生细骨料混凝土,从而满足不同需求的工程应用。
The linear relationship between the compressive strength of recycled fine aggregate concrete and the total amount of cementitious material or binder/water ratio is studied based on the multi-component composite technology of cementitious material system,and the mix proportion of recycled fine aggregate is optimized under different strength grades to realize the maximum engineering application of recycled fine aggregate.The results show that the mechanical properties of recycled fine aggregate concrete are worse than ordinary concrete,the maximum difference of 28 d compressive strength is 11.6 MPa,and the compressive strength of each curing age gradually increases with the increase of the total amount of cementitious materials or binder/water ratio,showing a good linear relationship.The recycled fine aggregate concrete of strength grade C20~C40 can be prepared by the optimized mix proportion of each series,so as to meet the different needs of engineering applications.
作者
郭远新
孔哲
李秋义
郑世东
GUO Yuanxin;KONG Zhe;LI Qiuyi;ZHENG Shidong(College of Architectural Engineering,Qingdao Agricultural University,Qingdao 266109,China;College of Civil Engineering,Qingdao City College,Qingdao 266106,China;Shandong Junhong Environmental Technology Co.,Ltd.,Zibo 255000,China)
出处
《混凝土》
CAS
北大核心
2022年第12期176-179,184,共5页
Concrete
基金
国家自然科学基金面上项目(51878366,51978353,52078261)
山东省重点研发计划(重大科技创新工程)项目(2021SFGC0201)
山东省自然科学基金面上项目(ZR2020ME036)
青岛市科技惠民示范引导专项(20-3-4-10-nsh)
青岛农业大学高层次人才科研基金项目(663-1120048)
校企合作项目(20213702030230,20193702012455)。
关键词
建筑固废
再生细骨料混凝土
胶凝材料用量
胶水比
抗压强度
配合比优化
building solid waste
recycled fine aggregate concrete
cementitious material content
binder/water ratio
compressive strength
mix proportion optimization
