表面活性剂对稀释沥青及其混合料工作性能的影响  

Influence of Surfactant on Performance of Diluted Asphalt and Its Mixture

作　　者：王黎明[1] 刘君云 王慧博 WANG Li-ming;LIU Jun-yun;WANG Hui-bo(School of Civil Engineering,Northeast Forestry University,Harbin Heilongjiang 150040,China;Harbin Municipal Engineering Design Institute,Harbin Heilongjiang 150040,China)

机构地区：[1]东北林业大学土木工程学院,黑龙江哈尔滨150040 [2]哈尔滨市市政工程设计院,黑龙江哈尔滨150040

出　　处：《公路交通科技》2023年第6期1-8,共8页Journal of Highway and Transportation Research and Development

基　　金：中央高校基本科研业务费专项资金(2572014CB22,2572018BJ16);黑龙江省交通运输厅科技项目(20210027)。

摘　　要：为探究表面活性剂对稀释沥青及其沥青混合料工作性的影响,将稠油降黏剂AMS与Span80复配后添加至稀释沥青中,通过黏温关系、表面接触角、拌和裹附率以及压实特性四阶段的试验分别考察了表面活性剂对稀释沥青混合料拌和与压实的影响作用。试验结果表明:复配油溶性表面活性剂能显著降低沥青与集料界面的表面张力并使稀释沥青降黏,其中界面影响占主导地位,复配表面活性剂的掺入能够在降低柴油用量的条件下保证混合料的拌和效果;复配表面活性剂的掺入可降低稀释沥青黏度,对改善稀释沥青施工和易性有显著效果,能够明显改变沥青与集料之间的液-固界面张力,在降低稀释剂剂量的条件下使沥青混合料仍然达到较好的施工性能;复配表面活性剂的掺入可使沥青在集料表面铺展性更好,降低阻力,更易于摊铺;在压实成型过程中,复配表面活性剂的掺入可使沥青与集料之间起到润滑效果,可使稀释沥青混合料最终压实度更大,使得沥青在集料表面的润湿和铺展能力提高,改善混合料的拌和均匀性及更易于摊铺压实;在1.0%~1.5%的表面活性剂剂量下,对稀释沥青混合料摊铺、压实特性的改善可达到增加4%~6%柴油的效果,1.0%~1.5%复配表面活性剂可代替4%~6%的柴油稀释剂,使混合料达到相同的拌和均匀性和压实工作性。To explore the influence of surfactant on performance of diluted asphalt and its mixture,the mixture of heavy oil viscosity reducer AMS and Span80 is added to diluted asphalt,the influences of surfactant on the mixing and compaction of diluted asphalt mixture are investigated through the tests of viscosity-temperature relationship,surface contact angle,mixing adhesion rate and compaction characteristics.The experimental result shows that(1)The mixed oil-soluble surfactant can significantly reduce the surface tension of asphalt-aggregate interface and reduce the viscosity of the diluted asphalt,in which the influence on interface is dominant.The addition of the mixed surfactant can ensure the mixing effect of the mixture under the condition of reducing the diesel consumption.(2)The addition of the mixed surfactant can reduce the viscosity of diluted asphalt,and has significant effect on improving the construction workability of diluted asphalt.It can significantly change the liquid-solid interfacial tension between asphalt and aggregate,and make the asphalt mixture still achieve good construction performance under the condition of reducing the content of diluent.(3)The addition of the mixed surfactant can make asphalt spread better on aggregate surface,reduce resistance and is easier for paving.(4)During the compaction process,the addition of the mixed surfactant can play lubricating effect between asphalt and aggregate,make the final compactness of the diluted asphalt mixture greater,improve the wetting and paving ability of asphalt on the aggregate surface,improve the mixing uniformity of the mixture and make it easier for paving and compaction.(5)At the surfactant dosage of 1.0%-1.5%,the improvement of the paving and compaction characteristics of the diluted asphalt mixture can achieve the effect of adding 4%-6%diesel oil,the 1.0%-1.5%mixed surfactant can replace 4%-6%diesel diluent,so that the mixture can achieve the same mixing uniformity and compacting performance.

关 键 词：道路工程 常温沥青混合料 表面活性剂 稀释沥青 工作性能 

分 类 号：U414[交通运输工程—道路与铁道工程]