摘要
在水泥砂浆中掺入不同掺量(0、0.5%、1%、1.5%、2%、2.5%)和不同尺度(3 mm、6 mm、6+3 mm、12 mm)的玄武岩纤维,用压汞法(MIP)测定纤维增强水泥砂浆的孔结构特征,并测试不同玄武岩纤维掺加条件下水泥砂浆的抗折和抗压强度。结果表明:双掺6+3 mm和单掺12 mm的玄武岩纤维时水泥砂浆孔隙率降低的最大幅度分别为56.20%和53.09%,压折比降低最大幅度分别为16.91%和17.09%,双掺6+3 mm的玄武岩纤维时抗折强度随着纤维掺量的增加而持续升高,最大增长幅度为27.09%;而单掺6 mm和3 mm的玄武岩纤维对水泥砂浆孔结构和抗折强度的变化幅度相对较小。
The cement mortar was mixed with different dosages （0,0.5%, 1%, 1.5%, 2%, 1.5% ） and different length （ 3 mm, 6 mm, 3＋6 mm, 12 ram） of basalt fiber, the pore structure characteristics of fiber reinforced cement mortar was tested by mercury intrusion method （MIP）, and the flexural and compressive strength of cement mortar mixed with different length of basalt fiber were also tested.The results show that the cement mortar mixed respectively with 6＋3 mm and 12 mm of basalt fiber decrease the porosity by 56.20% and 53.09% dra- matically,decrease the compressive to flexural strength ratio by 16.91% and 17.09% significantly,the flexural strength of the cement mixed with 6＋3 mm of basalt fiber increases with the increase of fiber dosage and the biggest increase is 27.09% ; The change of the ce- ment mortar＇s pore structure and flexural strength mixed with 6 mrn and 3 mm longness basalt fiber was not obvious.
出处
《混凝土》
CAS
北大核心
2016年第6期110-113,共4页
Concrete
基金
四川省建筑科学研究院博士后基金(PD02)
国家“863”计划(2015AA034701)
关键词
玄武岩纤维
尺度
孔结构
抗折强度
压折比
basalt fiber
length
pore structure
flexural strength
compressive to flexural strength ratio
