许 耀,吴 庆,史文浩,陈 伟,杜 辉,王 刚,王石林
许耀,吴庆,史文浩,等.不同短切纤维对高强透水混凝土性能的影响[J].混凝土与水泥制品,2019(10):40-43.
XU Y,WU Q,SHI W H,et al.Effects of Different Chopped Fibers on Properties of the High Strength Pervious Concrete[J].China Concrete and Cement Products,2019(10):40-43.
不同短切纤维对高强透水混凝土性能的影响
许 耀,吴 庆,史文浩,陈 伟,杜 辉,王 刚,王石林
许耀,吴庆,史文浩,等.不同短切纤维对高强透水混凝土性能的影响[J].混凝土与水泥制品,2019(10):40-43.
XU Y,WU Q,SHI W H,et al.Effects of Different Chopped Fibers on Properties of the High Strength Pervious Concrete[J].China Concrete and Cement Products,2019(10):40-43.
摘 要:研究了改性聚丙烯纤维(MPPF)、玄武岩纤维(BF)、仿钢纤维(ISF)以及MPPF的掺量、长度对高强透水混凝土孔隙率、透水系数、抗压强度和抗折强度的影响规律,并与空白组进行了对比。结果表明,掺入不同种类的短切纤维,对高强透水混凝土抗压强度影响不明显,对抗折强度改善效果更为明显,且MPPF改善效果最优;随着MPPF掺入长度的增加,抗压强度先增大后减小,与空白组相比,掺入短切纤维均使得孔隙率和透水系数下降,且透水系数更为敏感;当MPPF掺量为1 kg/m3,长度为18 mm时,透水混凝土可以满足主要机动车路面的应用要求。
Abstract: In order to study the influence of different kinds of fibers on the mechanical properties of pervious concrete, the effects of the content and length of polypropylene fiber(MPPF), basalt fiber(BF), and steel fiber(ISF) on the porosity, permeability coefficient, compressive strength and flexural strength of high-strength pervious concrete were investigated. The results show that adding different kinds of short-cut fibers has no obvious influence on the compressive strength of high strength pervious concrete, and the improvement effect of flexural strength is more obvious, among which MPPF has the best improvement effect. With the increase of the incorporation length of MPPF, the compressive strength first increases and then decreases. Compared with the blank group, the incorporation of short cut fiber reduces the porosity and permeability coefficient, and the permeability coefficient is more sensitive. When the content of MPPF is 1 kg/m3, the length of the permeable concrete is 18 mm, which can meet the application requirements of main motor vehicle pavement.
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