摘要
聚丙烯纤维和磨细粒化高炉矿渣对混凝土抗劈拉性能有一定程度的影响,为此,有必要研究聚丙烯纤维和矿渣的掺入量及其对混凝土抗劈拉性能的作用机理。将不同掺入量的聚丙烯纤维和不同含量的磨细粒化高炉矿渣掺入混凝土中,制成63个100 mm×200 mm的圆柱体试样,按照ASTMC496-04标准进行抗劈拉试验,并通过SEM对微观结构进行观测。研究表明,掺入不超过0.6%的聚丙烯纤维的混凝土其抗劈拉强度较大,当矿渣替代水泥不超过55%时,抗劈拉强度比不掺矿渣的试样高,SEM照片从微观结构方面揭示了强化作用机理。适量聚丙烯纤维的掺入提高了混凝土抗劈拉强度,适量矿渣的掺入也提高了混凝土抗劈拉强度,聚丙烯纤维和矿渣复合效应显著。
An experimental study is conducted to investigate the tensile effects of the concrete when introducing polypropylene fibers and ground granulated blast furnace slags into it.According to different fiber volume fractions and slag contents, the cylinders of 100 mm×200 mm are made for the splitting tensile tests of the concrete.The results reveal that not only the polypropylene fibers but also slags could significantly improve the splitting tensile properties of the concrete,moreover,the composite effects of the polypropylene fibers and slags are significant.SEM pictures reveal the microstructure mechnism of reinforced effects.
出处
《水利与建筑工程学报》
2010年第1期10-11,26,共3页
Journal of Water Resources and Architectural Engineering
基金
陕西省自然科学基金资助项目(SJ08E111)
2007西北农林科技大学人才基金资助(011404)
关键词
混凝土
聚丙烯纤维
磨细粒化高炉矿渣
SEM
抗劈拉强度
机理
concrete
polypropylene fiber
ground granulated blast furnace slag（GGBFS）
SEM
splitting tensile strength
mechanism
