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掺加RAP的微表处混合料性能研究
作者：樊尚志，张雅杰
（宣化科技职业学院 建筑工程系，河北 张家口 075100）
摘要：为了多元化高效利用废旧沥青路面材料，并验证大掺量再生料（RAP）用于微表处混合料的可行性，试验研究了RAP掺量、乳化沥青用量等对再生料微表处混合料施工性能和路用性能的影响。结果表明，随RAP掺量增大，微表处混合料的施工和易性提高、粘附砂量增大，开放交通时间延长，但RAP掺量超过50%后，再生料微表处混合料粘聚力不符合JTG/T F40-02—2005《微表处和稀浆封层技术指南》要求。再生料微表处混合料的耐磨耗性能、抗车辙性能、水稳定性和低温抗裂性能随RAP掺量的增加而降低，因此用于填充车辙时，建议RAP掺量不宜大于40%。
关键词：微表处；再生料微表处混合料；RAP掺量；施工性能；路用性能
中图分类号：TU535 文献标识码：A 文章编号：1001-702X（2019）09-0019-05
Study on properties of micro-surfacing mixtures with RAP
FAN Shangzhi，ZHANG Yajie
（School of Architectural Engineering，Xuanhua Science & Technology Vocational College，Zhangjiakou 075100，China）
Abstract：In order to diversify and efficiently use recycled asphalt pavement（RAP），and verify the feasibility of using large quantities of RAP for micro-mixtures，the effects of RAP content and emulsified asphalt dosage on the construction performance and pavement performance of the micro-surfacing mixtures with RAP were studied with experiments. The results show that with the increase of the amount of RAP，the workability of the mixture at the micro-surfacing is improved，the amount of adhering sand is increased，the open traffic time is prolonged. However，when the amount of RAP is more than 50%，the adhesion force of micro-surfacing mixtures didn't meet the requirements of standard JTG/T F40-02—2005 "Technical Guidelines for Micro-Surfacing and Slurry Seal". The wear resistance，rutting resistance，water stability and low temperature crack resistance of the mixture at the micro-mixture of recycled materials decrease with the increase of the amount of RAP. Therefore，when used for filling ruts，it is recommended that the amount of RAP should not exceed 40%.
Key words：micro-surfacing，micro-surfacing mixtures with recycled materials，amount of RAP，construction performance，road performance