摘要
针对偶联改性玄武岩纤维增强沥青胶浆现有研究现状和不足,采用硅烷偶联剂对玄武岩纤维进行表面改性,制备了不同粉胶比和不同纤维掺量的偶联改性玄武岩纤维增强沥青胶浆,通过低温延度、弹性恢复、锥入度及软化点试验,研究了沥青胶浆低、中、高温性能,并对偶联改性玄武岩纤维增强沥青胶浆机理进行分析。研究表明,偶联改性玄武岩纤维与沥青胶浆润湿性好、黏附性强,表面沥青胶浆膜厚度大,纤维力学特性发挥显著,粉胶比在0.8~1.0、纤维掺量在0.4%~0.6%之间时,沥青胶浆抗拉强度、抗剪强度、弹性恢复率及软化点明显提高,沥青胶浆低温抗裂、高温抗剪切、疲劳性能及自愈能力得到较大改善,研究成果对矿物纤维复合材料在道路工程中的推广与应用具有一定的实际意义。
Because of the lack of existing studies of silane coupling agent modified basalt fiber reinforced asphalt mucilage,this study used silane coupling agent KH-550 to modify the surface of basalt fiber and then prepared fiber reinforced asphalt mucilage in different powder binder ratios and dosages of fiber. The performance of low temperature,middle temperature and high temperature of these specimens were studied by low temperature ductility test,elastic recovery test,cone penetration test and softening point test and then the enhancement mechanism of modified basalt fiber reinforced asphalt mucilage was analyzed. The results show that modified basalt fiber had good wettability with asphalt mucilage; the adhesion between fiber and asphalt mucilage was strong; fiber＇ s surface film thickness of asphalt mucilage was large and the mechanical properties of modified fiber was significantly developed.When the powder binder ratio is between 0. 8 ~ 1. 0 and the dosage of modified fiber is between 0. 4% ~ 0. 6%,the tensile strength,anti-shearing strength,elastic recovery ratio and softening point of asphalt mucilage were significantly enhanced,which indicate the abilities of low temperature anti-cracking,high temperature anti-shearing,fatigue performance and self-healing were improved. This study provides popularization and application of mineral fiber composite in road engineering.
出处
《玻璃钢／复合材料》
CAS
CSCD
北大核心
2016年第5期5-11,共7页
Fiber Reinforced Plastics/Composites
基金
国家自然科学基金项目(51178062)
湖南省自然科学基金项目(14JJ7041)
湖南省高等学校科学研究项目(14B001)
湖南省研究生科研创新项目(CX2015B341)
长沙理工大学公路养护技术国家工程实验室开放基金资助项目(kfj140111)
长沙理工大学研究生科研创新项目(CX2015SS01)
关键词
复合材料
硅烷偶联剂
玄武岩纤维
沥青胶浆
常规性能
增强机理
composite
silane coupling agent
basalt fiber
asphalt mucilage
performance
enhancement mechanism
