新型连续端钩钢纤维增韧混凝土残余弯拉强度分析
Analysis on Residual Flexural Strength of New Type of Continuous End Hook Steel Fiber Reinforced Concrete
关键词:
钢纤维混凝土;切口张开位移值;挠度;残余弯拉强度
Key words:
Steel fiber reinforced concrete; Cut open displacement; Deflection; Residual flexural strength
刊期:
2016年第3期
DOI:
文章编号:
1000-4637(2016)03-44-04
基金项目:
中国铁路总公司科研开发计划重点课题(合同号2014G004-N);国家自然科学基金项目(51378113)
作者:
丁 聪1,郭丽萍1,陈 波2,孙 斌3,徐文晓4
单位:
1.东南大学材料科学与工程学院,江苏省土木工程材料重点实验室,江苏省先进土木工程 材料协同创新中心,南京 211189;2.南京水利科学研究院,210024; 3.上海贝卡尔特-二钢有限公司,200131;4.贝卡尔特亚洲研发中心,江阴 214434)
摘要
摘 要:为了研究不同钢纤维掺量、不同胶凝材料组成对混凝土残余弯拉强度的影响,根据金属纤维混凝土测试方法测试了钢纤维掺量为30kg/m3与40kg/m3的新型连续端钩型钢纤维增韧混凝土的载荷和切口张开位移值(CMOD)或挠度曲线图。试验结果表明,随着钢纤维掺量的增加,钢纤维混凝土残余弯拉强度及极限抗折强度均随之增加;硅酸盐水泥复掺硫铝酸盐水泥的钢纤维混凝土残余弯拉强度及极限抗折强度较普通钢纤维混凝土有所降低。钢纤维掺量的提高有助于提高混凝土的增强阻裂能力。
Abstract: In order to study the influence of different steel fiber content and the composition of different cementitious materials on the residual flexural strength of concrete, according to test method of metal fiber concrete, the load and the CMOD or deflection curve of the new type of continuous steel fiber reinforced which steel fiber content is 40kg/m3 and 30kg/m3 were tested. The experimental results show that, the residual flexural strength and ultimate flexural strength of steel fiber reinforced concrete are increased with the increasing of steel fiber content.The residual flexural strength and ultimate flexural strength of the steel fiber reinforced concrete mixed Portland cement with sulphoaluminate cement are lower than that of ordinary steel fiber reinforced concrete. The increase of steel fiber content is helpful to improve the capacity of resist cracking.
结论
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