摘要
Abstract
In order to study the effects of nanomaterials such as nano-CaCO3,nano-SiC,and nano-ZnO on the road performance of asphalt mixtures,the conventional properties of three nanomaterial-modified asphalts were first analyzed using three major indicators and Brabender viscosity test,and an optimal nanomaterial-modified asphalt was selected for dynamic shear rheology test and low-temperature bending beam rheology test to evaluate its rheological properties at high and low temperatures.Finally,using matrix asphalt and SBS-modified asphalt as control groups,a series of indoor tests were conducted to comprehensively evaluate the high and low temperature performance,as well as the moisture resistance of nano-ZnO asphalt mixtures.The test results show that the conventional properties of nano-ZnO modified asphalt are significantly better than those of nano-CaCO3 and nano-SiC.Nano-ZnO can significantly improve the high-temperature rheological properties of modified asphalt,but has no significant effect on low-temperature rheological properties.The addition of nano-ZnO significantly enhances the high-temperature stability,low-temperature crack resistance,and moisture resistance of asphalt mixtures.It is recommended that the content of ZnO be 3％.关键词
道路工程/纳米材料/改性沥青/沥青混合料/路用性能Key words
road engineering/nanomaterials/modified asphalt/asphalt mixture/road performance分类
交通工程
