摘要
主要改变混凝土中石粉掺量、胶砂比、水灰比、吸水树脂用量,对比工作性及钢筋混凝土界面握裹力分析,采用混凝土气泡间隙测试仪观察拉升后界面结构和混凝土强度比较,最终确定C(水泥)∶S(砂)∶G(石)=1∶1.70∶2.64,石粉量8%,减水剂1%,吸水树脂0.20%,3 d强度提高31.9%;7 d强度提高29.1%;28 d强度提高57.2%,满足C40混凝土强度的要求,进一步提高机制砂对钢筋界面握裹力的性能。
This paper mainly changes the amount of stone powder,mortar ratio,water-cement ratio and water-absorbing resin in concrete,compares workability and reinforced concrete interface gripping force analysis,and uses a concrete bubble gap tester to observe the interface structure and concrete strength after pulling.By comparison,C(cement)∶S(sand)∶G(stone)=1∶1.70∶2.64,8%stone powder,1%water reducing agent,0.20%water absorbent resin,3 days strength value increased by 31.9%;7 days strength is increased by 29.1%;the 28 days strength is increased by 57.2%,which meets the requirements of C40 concrete strength,and further improves the performance of machine-made sand on the interfacial grip of steel bars.
作者
温宏平
李培荣
WEN Hongping;LI Peirong(School of Engineering Management,Shanxi Vocational University of Engineering Science and Technology,Jinzhong 030619,China)
出处
《四川建材》
2024年第2期6-8,41,共4页
Sichuan Building Materials
基金
山西工程科技职业大学科研基金项目:多因素耦合侵蚀环境下机制砂混凝土性能研究+KJ202227(10503)
山西长达交通设施有限公司委托课题:路桥构件养护修复材料及施工工艺研究(80070018)。
关键词
拉拔值
胶砂比
石粉含量
流动性
drawing value
cement-sand ratio
stone powder content
fluidity