刘子璐,陈新明,韩振宇,韩晓龙,靳翔飞
孔隙结构对玄武岩纤维混凝土力学性能的影响研究
The Influence Study of Pore Structures on Mechanical Properties of Basalt Fiber Concrete
2019年第1期
玄武岩纤维;抗压强度;回归分析;孔隙结构
Basalt fiber; Compressive strength; Regression analysis; Pore structure
2019年第1期
10.19761/j.1000-4637.2019.01.047.04
国家自然科学基金项目(51704094、51574013);河南省矿产资源绿色高效开采与综合利用重点实验室基金项目(s201606)。
刘子璐,陈新明,韩振宇,韩晓龙,靳翔飞
河南理工大学土木工程学院,焦作 454003
刘子璐,陈新明,韩振宇,等.孔隙结构对玄武岩纤维混凝土力学性能的影响研究[J].混凝土与水泥制品,2019(1):47-50.
LIU Z L,CHEN X M,HAN Z Y,et al.The Influence Study of Pore Structures on Mechanical Properties of Basalt Fiber Concrete[J].China Concrete and Cement Products,2019(1):47-50.
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孔隙结构对玄武岩纤维混凝土力学性能的影响研究
英文名 :
The Influence Study of Pore Structures on Mechanical Properties of Basalt Fiber Concrete
刊期 :
2019年第1期
关键词 :
玄武岩纤维;抗压强度;回归分析;孔隙结构
Key words :
Basalt fiber; Compressive strength; Regression analysis; Pore structure
刊期 :
2019年第1期
DOI :
10.19761/j.1000-4637.2019.01.047.04
文章编号 :
基金项目 :
国家自然科学基金项目(51704094、51574013);河南省矿产资源绿色高效开采与综合利用重点实验室基金项目(s201606)。
作者 :
刘子璐,陈新明,韩振宇,韩晓龙,靳翔飞
单位 :
河南理工大学土木工程学院,焦作 454003
刘子璐,陈新明,韩振宇,韩晓龙,靳翔飞
刘子璐,陈新明,韩振宇,等.孔隙结构对玄武岩纤维混凝土力学性能的影响研究[J].混凝土与水泥制品,2019(1):47-50.
LIU Z L,CHEN X M,HAN Z Y,et al.The Influence Study of Pore Structures on Mechanical Properties of Basalt Fiber Concrete[J].China Concrete and Cement Products,2019(1):47-50.
摘要
参数
结论
参考文献
引用本文
摘 要:为探究玄武岩纤维(BF)掺量对混凝土孔隙结构的作用机制,进而影响抗压性能的规律,制作了玄武岩纤维掺量为0、1.5 kg/m3、3.0 kg/m3、4.5 kg/m3、6.0 kg/m3、7.5 kg/m3的标准尺寸试块,进行抗压性能试验,得出不同BF掺量混凝土各龄期下的抗压强度。引入核磁共振(NMR)技术,测试不同BF掺量的混凝土孔隙分量结构。通过回归分析表明,随着纤维掺量的增加,混凝土抗压强度呈先增后减的趋势。BF掺量为3.5 kg/m3时7 d、14 d抗压强度最大,较素混凝土分别增大6.4%和7.6%,BF掺量为3 kg/m3时28 d抗压强度最大,较素混凝土增加14.1%。NMR试验结果显示,混凝土内部总孔隙率随着BF掺量的增大而增大,混凝土内部总孔隙率达到一定值后导致其抗压强度降低。通过分析抗压试验应力-应变曲线,得出BF混凝土抗压损规律,并对其增强机理进行了简要分析。
Abstract: In order to study the and mechanism are of basalt fiber(BF) content on concrete pore structure and compressive performance, the standard size test blocks of 0, 1.5 kg/m3, 3.0 kg/m3, 4.5 kg/m3, 6.0 kg/m3, 7.5 kg/m3 cubed were made, and the compressive strength of concrete with different BF contents at each age was obtained through the compressive performance tests. Nuclear magnetic resonance(NMR) technology was used to test the pore component structure of concrete with different BF dosage. The regression analysis shows that the compressive strength of concrete increases first and then decreases with the increase of fiber content. When BF content is 3.5 kg/m3, the 7 d and 14 d compressive strength reach the greatest, increasing by 6.4% and 7.6% respectively compared with plain concrete. When BF content is 3 kg/m3, the 28 d compressive strength reaches the greatest, increasing by 14.1% compared with plain concrete. The NMR test results show that the total porosity in concrete increases with the increase of the content of BF, and the compressive strength of concrete decreases when the total porosity in concrete reaches a certain value. By analyzing the stress-strain curve of compression test, the law of compression loss of BF concrete was obtained, and the strengthening mechanism was analyzed briefly.
关键词:
玄武岩纤维;抗压强度;回归分析;孔隙结构
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