安全与环境工程2024，Vol.31Issue(3)：138-149,12.DOI:10.13578/j.cnki.issn.1671-1556.20230713
废旧混凝土再生材料在沥青混凝土中的稳定化利用研究
Research on the stable utilization of recycled materials from waste concrete in asphalt concrete
摘要
Abstract
To realize the convenient and efficient utilization of waste concrete,based on the analysis results of the macro and micro properties of recycled materials with different particle size ranges and the main en-gineering performance of their asphalt concrete,the suitable particle size range of recycled materials that can overcome the property defects of RCA and the suitable utilization plan of recycled materials in asphalt concrete within this particle size range are determined.The results indicate that the poor material proper-ties and large variability of material properties of RCA,caused by the gaps and cracks at the interface be-tween mortar and crush aggregate,as well as internal pores and cracks in the mortar layer,are significantly improved with the decrease of the particle size of recycled materials.Especially when recycled materials exist in powder form,the material properties are very uniform.Therefore,it is recommended to reuse the waste concrete in the form of recycled powder.The combined use of high alkaline cement and recycled pow-der can eliminate the potential adverse effect of high SiO2 content in recycled powder on the performance of asphalt concrete.When the volume ratio of recycled powder to cement is 3:1,asphalt concrete can be pre-pared with water stability,high and low temperature performance,and fatigue performance that meet the requirements of the Technical Specification for Highway Asphalt Pavement Construction(JTG F40-2004).关键词
废旧混凝土/再生骨料/再生粉料/沥青混凝土/稳定化利用Key words
waste concrete/recycled aggregate/recycled powder/asphalt concrete/stable utilization分类
资源环境引用本文复制引用
郭汝涛,黄选银,马彩霞,张国华,陈宗武..废旧混凝土再生材料在沥青混凝土中的稳定化利用研究[J].安全与环境工程,2024,31(3):138-149,12.基金项目
国家自然科学基金面上项目(42277173) （42277173）
湖北省教育厅科研项目(B2021003) （B2021003）
武汉市知识创新专项-曙光计划项目(2023020201020344) （2023020201020344）
绿色建筑材料国家重点实验室开放课题项目(2021GBM03) （2021GBM03）
