摘要
以玄武岩纤维体积掺量和纳米SiO_(2)取代率为考虑因素,通过立方体抗压强度、劈裂抗拉强度以及抗折强度试验,研究了玄武岩纤维与纳米SiO_(2)增强混凝土的力学性能。研究发现:玄武岩纤维的掺入改变了纳米SiO_(2)混凝土的破坏形式;复合掺入玄武岩纤维与纳米SiO_(2)时,混凝土基体的立方体抗压强度、劈拉强度与抗折强度均有一定的提高。纤维体积掺量为0.10%的玄武岩纤维与取代率为1.0%的纳米SiO_(2)共同掺入时,玄武岩纤维纳米SiO_(2)混凝土的立方体抗压强度与抗折强度增强效果最优;当玄武岩纤维体积掺量为0.15%、纳米SiO_(2)取代率为1.5%时,玄武岩纤维纳米SiO_(2)混凝土的劈拉强度增强效果最优,较素混凝土提高了22.97%,基于试验数据建立了玄武岩纤维掺量纳米SiO_(2)增强混凝土的立方体抗压强度预测模型。
The mechanical properties of basalt fiber and nano-SiO_(2) reinforced concrete were studied by cube compressive strength,splitting tensile strength,and flexural strength tests with basalt fiber volume fraction and nano-SiO_(2) substitution rate as factors.It is found that the basalt fiber can change the failure mode of Nano-SiO_(2) concrete.When basalt fiber and nano-SiO_(2) are mixed,the cube compressive strength,splitting tensile strength,and flexural strength of concrete matrix are improved.The results show that the cubic compressive strength and flexural strength of basalt fiber nano-SiO_(2) concrete are the best when basalt fiber volume content is 0.10%and nano-SiO_(2) content is 1.0%.When the volume fraction of basalt fiber is 0.15%and the replacement rate of Nano-SiO_(2) is 1.5%,the splitting tensile strength of basalt fiber nano-SiO_(2) concrete is the best,which is 22.97%higher than that of plain concrete.Based on the experimental data,the cube compressive strength prediction model of basalt fiber nano-SiO_(2) reinforced concrete is established.
作者
任莉莉
REN Li-li(College of Railway Engineering,Liaoning Railway Vocational and Technical College,Jinzhou 121001,China)
出处
《复合材料科学与工程》
CAS
北大核心
2021年第8期85-90,共6页
Composites Science and Engineering
基金
辽宁省教育厅科研项目(LJKY2019113)。
