破碎工艺对回收沥青路面材料再利用特性的影响
Influence of Crushing Process on Reuse Characteristics of Recycled Asphalt Pavement Materials
周健楠 1张哲诚 2王洋 2朱建平 1宋运良3
作者信息
- 1. 辽宁省交通科学研究院有限责任公司,辽宁沈阳 110015;高速公路养护技术交通运输行业重点实验室,辽宁沈阳 110015
- 2. 辽宁省高速公路运营管理有限责任公司,辽宁沈阳 110003
- 3. 辽宁交投公路科技养护有限责任公司,辽宁沈阳 110148
- 折叠
摘要
现介绍了一种全新的RAP精分离预处理方式,利用提出的筛余率偏差(％,破碎筛分后,旧料抽提前和抽提后的各筛孔筛余量差值)和RAP料级配的变异系数CV(％)指标,科学深入地对比了精分离预处理方式与经过传统破碎工艺后的RAP材料再生利用特性指标的区别.结果表明:采用精分离工艺对RAP进行处理,可较好地控制旧料中的假粒径含量和沥青含量,能有效保证再生沥青混合料的级配稳定性.
Abstract
This paper introduces a novel pretreatment method of RAP fine separation.It also provides a scientifically and deeply comparison between this method and traditional crushing technology regarding the recycling characteristic of RAP materials.This comparison utilizes the proposed deviation(％)of screen residue rate(the difference between the old material after crushing and screening and the screen residue of each screen hole after extraction)and the variation coefficient(CV,％)of RAP material gradation.The results show that using the fine separa-tion process to treat RAP can better control the false particle size content and asphalt content in old materials,and can effectively ensure the gradation stability of recycled asphalt mixture.
关键词
破碎工艺/回收沥青路面/材料特性/道路工程Key words
crushing process/recycled asphalt pavement/material characteristics/road engineering引用本文复制引用
出版年
2024
NETL
NSTL
万方数据