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玄武岩纤维沥青碎石封层性能及合理材料用量
Performance and Rational Content of Basalt Fiber Asphalt Chip Coat
投稿时间:2016-04-14  修订日期:2016-06-16
DOI:10.3969/j.issn.1007 9629.2017.03.016
中文关键词:  玄武岩纤维  应力吸收层  黏结性能  最佳含量
英文关键词:basalt fiber  stress absorbing layer  bond performance  optimal content
基金项目:国家自然科学基金资助项目(51108082)
              
作者单位
张小元
ZHANG Xiaoyuan
东南大学交通学院,江苏南京210096
School of Transportation, Southeast University, Nanjing 210096, China
顾兴宇
GU Xingyu
东南大学交通学院,江苏南京210096
School of Transportation, Southeast University, Nanjing 210096, China
吕俊秀
L Junxiu
东南大学交通学院,江苏南京210096
School of Transportation, Southeast University, Nanjing 210096, China
黄子珍
HUANG Zizhen
东南大学交通学院,江苏南京210096
School of Transportation, Southeast University, Nanjing 210096, China
倪富健
NI Fujian
东南大学交通学院,江苏南京210096
School of Transportation, Southeast University, Nanjing 210096, China
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中文摘要:
      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/m2和1.9kg/m2.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%.
英文摘要:
      Through plate impact test, sweeping test, pull out test and direct shear test, bond performances were inspected. The results indicate that basalt fiber(BF) can significantly improve the performances of aggregates retention and interlayer bond for asphalt chip coat, where the optimal design is to use 1.9kg/m2 modified asphalt(EA) and 85 g/m2 BF at a length of 70 mm. Then the performances of chip seal in terms of low temperature anti cracking, interlayer bond and refelection craking resistance were evaluated. Specimens of different EA contents, BF contents and lengths were fabricated to quantify the respective impacts. The fiber demonstrates to substantially enhance performances of chip coat compared to the control specimens(0% BF). Specifically, the tensile strength, shear strength and fracture energy are increased by 37.6%, 280%, 87.4%, respectively.
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