顺酐化再生剂的再生效果及再生机理研究  

Research on Regeneration Effect and Mechanism of Maleic Anhydride Regenerant

作　　者：周超 沈旭 姜浩然 章奇 ZHOU Chao;SHEN Xu;JIANG Hao-ran;ZHANG Qi(Zhejiang Communications Group Testing Technology Co.Ltd.,Hangzhou 310030,China)

机构地区：[1]浙江省交通集团检测科技有限公司,杭州市310030

出　　处：《公路》2023年第3期327-331,共5页Highway

摘　　要：根据专利《一种沥青再生剂及其制备方法和应用》(专利号:2018107948408)制备顺酐化再生剂,并通过沥青的针入度、延度、软化点、黏度和车辙因子试验,测试该再生剂的再生效果。结果表明,顺酐化再生剂技术指标满足RA-5等级,老化后的基质沥青、改性沥青中加入顺酐化再生剂后,其抗低温性能均有明显提高。改性沥青135℃旋转黏度及车辙因子测试结果表明,顺酐化再生剂的加入能增加沥青黏度,但对耐高温性能不利。从微观组成探究再生剂的作用机理,沥青的老化实质上是组分的转移,加入再生剂后,补充老化沥青中的轻质组分,使得沥青中的分散剂及分散相逐渐趋于稳定,进而增加沥青黏度,恢复老化沥青的抗低温性能,但轻质组分的增加对沥青的耐高温性能不利。A maleic anhydride regenerant is prepared according to the patent-Asphalt Regenerant as well as Preparation Method and Application Thereof(Patent No.:2018107948408),and the regeneration effect of the regenerant is tested through the penetration,ductility,softening point,viscosity,and rutting factor tests of asphalt.The results show that the technical index of maleic anhydride regenerant meet the grade of RA-5.After adding the maleic anhydride regenerant to the aged base asphalt and modified asphalt,its low-temperature resistance is significantly improved.The test results of the rotational viscosity and rutting factor of the modified asphalt at 135℃ show that the addition of maleic anhydride regenerant can increase the viscosity of the modified asphalt,but it is unfavorable to the high-temperature resistance.The regeneration mechanism of regenerant is explored from the microscopic composition of asphalt.The aging of the asphalt is essentially the transfer of components.After the addition of regenerant,the light components in the aged asphalt are supplemented,so that the dispersant and dispersed phase in the asphalt gradually tend to be stable.As a result,the asphalt viscosity is increased and the low-temperature resistance of the aged asphalt is restored.However,the increase of light components is detrimental to the high-temperature resistance of asphalt.

关 键 词：再生沥青 顺酐再生剂 再生效果 再生机理 

分 类 号：U414.75[交通运输工程—道路与铁道工程] U414.01