摘要
以玻璃纤维(GF)和纳米SiO_2为添加剂,分别进行了玻璃纤维改性多孔沥青、纳米SiO_2改性多孔沥青及玻璃纤维和纳米SiO_2复合改性多孔沥青。通过析漏实验、载荷轮(LWT)测试及间接拉伸反复荷载试验研究了添加剂与多孔沥青析漏率、抗车辙能力、抗拉强度等性能之间的关系,确定了多孔沥青复合材料性能与添加剂含量之间的变化规律,获得了最佳改性配比。结果表明,玻璃纤维与纳米SiO_2对多孔沥青的性能具有显著的改善作用,且复合改性比单一添加剂改性具有更加明显的效果。当玻璃纤维含量为0.5%、纳米SiO_2含量为4%时,多孔沥青复合材料的性能最佳,此时复合材料的车辙深度仅为0.9mm,抗拉强度为4 600kPa,析漏率为0.1%左右。
In this paper,three experiments of glass fiber modified porous asphalt,nano silica modified porous asphalt,glass fiber and nano silica composite modified porous asphalt were carried out with glass fiber and nano silica as additives.At the same time,the relationship between additives and the leakage rate,the anti rutting ability and the tensile strength of the porous asphalt was studied by the leakage experiment,the LWT test and the indirect tensile test.The change law between the material performance and the additive content was determined,and the best modified ratio was obtained.The results showed that glass fiber and silica have significant improvement on the performance of porous asphalt,and the composite modification has a more obvious effect than the single additive modification.When the content of glass fiber is 0.5% and the content of nano silica is4%,the material has the best performance.At this time,the rutting depth of the material is only 0.9 mm,the tensile strength is 4 600 kPa,and the leakage rate is about 0.1%.
作者
李有生
LI Yousheng(China Railway 12 Bureau Group 3 Engineering Co.Ltd.,Taiyuan 030024,China)
出处
《功能材料》
EI
CAS
CSCD
北大核心
2018年第8期8195-8199,共5页
Journal of Functional Materials
基金
国家自然科学基金资助项目(51608450
51678503)
