摘要
目的 研究分别添加Aspha-min、Sasobit和DAT温拌剂的3种温拌沥青混合料(WMA)水稳定性能,为解决温拌沥青混合料水稳定性不足提供参考。方法 对3种温拌沥青混合料的水稳定性能进行浸水马歇尔试验、冻融劈裂试验和动水冲刷试验,采用单轴贯入试验、低温劈裂试验对动水冲刷后的WMA试件水稳定性能进行评估。结果 3种WMA残留稳定度都可达到热拌沥青混合料(HMA)的技术水平,但冻融劈裂强度比降幅较大,尤其是添加Aspha-min后混合料的水稳定性较差;采用抗剥落剂和硅藻土对Aspha-min和Sasobit两种温拌剂进行复配后,两种温拌沥青混合料的水稳定性能都得到了显著改善;采用动水冲刷试验时WMA水稳定性能与残留稳定度结果较为一致。结论 在添加温拌剂后沥青混合料的水稳定性能会受到不利影响,在多雨地区尤其是多雨寒冷地区使用时可采用抗剥落剂或硅藻土进行改善。
The purpose of this paper is to study the water stability and improvement measures of warm mix asphalt mixture which added with Aspha-min,Sasobit and DAT respectively.The immersion Marshall test,freeze-thaw splitting test and dynamic water scouring test were used to evaluate the water stability of three kinds of WMA,and the water stability of WMA specimens after dynamic water scouring was evaluated by uniaxial penetration test and splitting test.The results show that the residual stability of the three WMA can reach the technical level of HMA,but the decrease of freeze-thaw splitting strength ratio is large,especially after adding Aspha-min.The water stability of WMA has been significantly improved by using anti-stripping agent and diatomite to mix Aspha-min and Sasobit.The results of residual stability of WMA are consistent when hydrodynamic scouring test is adopted.In general,the water stability of asphalt mixture after adding warm mix agent will be adversely affected,so anti-stripping agent or diatomite should be used to improve it when it is used in rainy areas,especially in rainy and cold areas.
作者
王春
张喜艳
郝培文
WANG Chun;ZHANG Xiyan;HAO Peiwen(Key Laboratory for Road Structure and Materials of Ministry of Transportation,Chang′an University,Xi′an,China,710064;Xi′an Northwest Civil Aviation Project Management Co.Ltd.,Xi′an,China,710075)
出处
《沈阳建筑大学学报（自然科学版）》
CAS
CSCD
北大核心
2022年第5期912-920,共9页
Journal of Shenyang Jianzhu University：Natural Science
基金
国家自然科学基金项目(51978073)
陕西省交通运输厅科研项目(15-11K)。
