钢-玄武岩混杂纤维增强混凝土的制备及其单轴受压性能研究

Preparation of steel-basalt hybrid fiber reinforced concrete and its uniaxial compression performance

为探究长龄期下的钢-玄武岩混杂纤维增强混凝土压缩性能,本文改变钢纤维和玄武岩纤维体积掺量制备了9组试件进行单轴受压试验,结果表明:(1)钢纤维体积掺量为1%和玄武岩纤维体积掺量为0.6%时的混凝土试件破坏形态相对较好,其抗压强度、峰值应变、轴压韧性比最大;(2)纤维对混凝土材料的耗能是起积极提升作用的,混掺纤维时,体积掺量为1.5%的钢纤维和体积掺量为0.4%对耗能提升效果最佳;(3)混掺钢纤维和玄武岩纤维时,玄武岩纤维对混凝土抗压强度影响较大,钢纤维对混凝土峰值应变影响较大,混凝土轴压韧性比受钢纤维的影响程度较大;(4)根据试验数据对混凝土的抗压强度、峰值应变与纤维体积掺量之间的关系进行了数据拟合。

In order to investigate the compressive properties of steel-basalt fiber hybrid reinforced concrete at long age,this paper changes the volume of steel fiber and basalt fiber admixture to prepare 9 groups of specimens for uniaxial compression test,the results show that:Concrete specimens with 1%volume admixture of steel fibers and 0.6%volume admixture of basalt fibers has relatively good damage patterns with compressive strength,peak strain,and axial compressive toughness ratios;②Fiber on the energy consumption of concrete materials is to play a positive role in enhancing,mixed with fiber,volume mixing of 1.5%of steel fiber and volume mixing of 0.4%of the energy consumption of the best effect of enhancement;③When mixing steel fibers and basalt fibers,basalt fibers have a greater effect on the compressive strength of concrete,steel fibers have a greater effect on the peak strain of concrete,and the axial compressive toughness ratio of concrete is affected to a greater extent by steel fibers;@The relationship between the compressive strength,peak strain and fiber volume admixture of concrete is fitted based on the test data.