基于硅烷偶联剂复合改性的高粘沥青试验研究  

Experimental study of silane coupling agent composite modified high viscosity asphalt

作　　者：王鹏飞 孙吉书 侯坤 WANG Peng-fei;SUN Ji-shu;HOU Kun(China Railway l4th Bureau Group 2nd Engineering Co,Ltd.,Tai'an 271000,China;School of Civil Engineering and Transportation,Hebei University of Technology,Tianjin 300401,China)

机构地区：[1]中铁十四局集团第二工程有限公司,山东泰安271000 [2]河北工业大学土木与交通学院,天津300401

出　　处：《热固性树脂》2021年第6期36-42,共7页Thermosetting Resin

基　　金：天津市自然科学基金(18JCTPJC54200);天津市交委科技计划项目(2021-23)。

摘　　要：采用硅烷偶联剂KH550制备了表面有机化硅藻土,将其与基质沥青、苯乙烯-丁二烯-苯乙烯三嵌段共聚物(SBS)、胶粉复配并加入增粘剂制备了一种高粘沥青。基于沥青宏观性能指标优选了改性配制方案,利用动态剪切流变试验(DSR)和汉堡车辙试验研究了产物了沥青的性能及表面有机化硅藻土对改性沥青路用性能的影响。结果表明:高粘改性沥青最优配比方案为:SBS质量分数3%,胶粉15%,增粘剂3%,硅藻土10%,KH550最佳掺量为硅藻土质量的5%。改性沥青的60℃零剪切粘度达到57 790 Pa·s,针入度降低16.4%,软化点提升15.8%,延度提高32.2%。表面有机化硅藻土增强了沥青与集料间的粘附性,高温稳定性和水稳定性,提高了改性沥青的路用性能,可用于应对排水沥青路面空隙率较大产生的车辙、剥落等道路病害。The silane coupling agent KH550 was used to prepare the surface organic diatomiteg. The product was compounded with matrix asphalt,SBS,rubber powder and a tackifier and a high-viscosity asphalt was prepared. Based on the macro performance indicators of the asphalt,the modified formulation plan was optimized. The performance of the product asphalt and the effect of surface organic diatomite on the road performance of the modified asphalt were studied by using the dynamic shear rheological test(DSR)and the Hamburg rutting test. The results showed that the optimal ratio of high-viscosity modified asphalt was as followed:SBS mass fraction 3%,rubber powder 15%,tackifier 3%,diatomite 10%,and KH550 optimal content was 5% of the diatomite mass. The 60 ℃ zero shear viscosity of modified asphalt reached 57 790 Pa·s. The penetration was reduced by 16.4%. The softening point and ductility was increased by 15.8% and 32.2%,respectively. The adhesion between asphalt and aggregate,high temperature stability and water stability were enhanced by the surface organic diatomite,and the road performance of modified asphalt was improved. It could be used to deal with road diseases such as rutting and spalling caused by high void ratio of drainage asphalt pavement.

关 键 词：高粘改性沥青 硅烷偶联剂 硅藻土 零剪切粘度 高温稳定性 水稳定性 

分 类 号：U416.2[交通运输工程—道路与铁道工程] U414