玄武岩纤维沥青碎石封层性能及合理材料用量

发布时间：2018-06-19 23:13

本文选题：玄武岩纤维 + 应力吸收层　；参考：《建筑材料学报》2017年03期

【摘要】：通过板冲击、扫刷、拉拔和直剪试验,研究了玄武岩纤维沥青碎石封层(应力吸收层)的黏结性能.结果表明:乳化沥青用量和纤维用量对纤维沥青碎石封层的黏结性能具有较大影响,合理的纤维用量能起到很好的增黏作用,70mm长的玄武岩纤维和乳化沥青最佳用量分别为85g/m~2和1.9kg/m~2.通过板带直接拉伸、直剪和三点弯曲试验,进一步探讨了乳化沥青用量、纤维用量及其长度对纤维沥青碎石封层低温抗裂、层间黏结和抗反射裂缝性能的影响,验证了在最佳纤维和乳化沥青用量下,纤维沥青碎石封层试件的抗拉强度、抗剪强度及断裂能相较于不掺纤维试件分别提高约37.6%,28.0%和87.4%.
[Abstract]:By plate impact, brushing, drawing and direct shear tests, the adhesive properties of basalt fiber asphalt gravel seal (stress absorption layer) were studied. The results show that the amount of emulsified asphalt and the amount of fiber have great influence on the cementing performance of fiber-bituminous macadam seal. The optimum dosage of fiber can increase viscosity of 70 mm long basalt fiber and emulsified asphalt, respectively, 85g/m~2 and 1.9 kg / m ~ (2) 2 路min ~ (-1) ~ (-1) 路m ~ (-1) ~ (-1) 路m ~ (-1). Through direct tensile test, direct shear test and three-point bending test, the effects of emulsified asphalt content, fiber content and length on the low temperature crack resistance, interlaminar adhesion and reflection crack resistance of fiber asphalt macadam seal were discussed. It is verified that the tensile strength, shear strength and fracture energy of the fiber-asphalt macadam seal specimens are increased by about 37.6% and 87.4%, respectively, compared with the non-fiber specimens under the optimum fiber and emulsified asphalt content.
【作者单位】：东南大学交通学院;江苏省道路养护工程技术研究中心;
【基金】：国家自然科学基金资助项目(51108082)
【分类号】：U416.214

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