摘要
为了研究玄武岩纤维粉煤灰混凝土各因素对力学性能的影响,采用正交试验方法研究粉煤灰掺量、纤维掺量、纤维长度以及减水剂掺量对玄武岩纤维粉煤灰混凝土抗压强度、劈裂抗拉强度和抗折强度的影响,并通过电镜扫描观察其细观状态分析玄武岩纤维和粉煤灰对这种复合材料结构增强增韧的机理。研究结果表明:粉煤灰掺量对混凝土抗压强度最具显著性影响,纤维掺量对混凝土的劈裂抗拉强度和抗折强度最具显著性影响;在优先侧重玄武岩纤维粉煤灰混凝土的抗压强度、劈裂抗拉强度和抗折强度要求下,最优配合比分别为A1B1C2D2、A1B3C2D1和A1B1C3D2;玄武岩纤维和粉煤灰对纤维粉煤灰混凝土这种复合材料力学性能的改善均贡献各自的作用。
To study the influence of various factors on the mechanical properties of basalt fiber fly ash concrete,the orthogonal test method was adopted to study the influence of fly ash content,fiber content,fiber length and water reducing agent on the compressive strength,splitting tensile strength and flexural strength of basalt fiber fly ash concrete,and the microscopic state was observed by scanning electron microscopy to analyze the mechanism of basalt fiber and fly ash on the strengthening and toughening of the composite structure.The results show that the content of fly ash has the most significant effect on the compressive strength of concrete,and the content of fiber has the most significant effect on the splitting tensile strength and bending strength of concrete.In priority on basalt fiber fly ash concrete compressive strength,splitting tensile strength and flexural strength requirement,the optimal mix ratio is A1B1C2D2,A1B3C2D1 and A1B1C3D2,respectively.Basalt fiber and fly ash contribute to the improvement of mechanical properties of fiber fly ash concrete composite.
作者
金生吉
吴永强
杨宇豪
许立
JIN Shengji;WU Yongqiang;YANG Yuhao;XU Li(Department of Civil Engineering,Shenyang University of Technology,Shenyang 110870,China)
出处
《混凝土》
CAS
北大核心
2022年第12期163-167,共5页
Concrete
基金
国家自然科学基金项目(11272216)
辽宁省交通厅科技项目(202007)
沈阳市科技局项目(20-206-4-11)。
关键词
玄武岩纤维
粉煤灰
微观结构
正交试验
力学性能
basalt fiber
fly ash
microstructure
orthogonal test
mechanical property
