回收旧集料评价及再生合成级配设计与检验  

EVALUATION OF RECYCLED AGGREGATES AND DESIGN AND INSPECTION OF RECYCLED SYN THETIC GRADATION

作　　者：文凤友 WEN Fengyou(Hunan Guoxin Construction Group Co.,Ltd.,Zhuzhou 412000,China)

机构地区：[1]湖南国信建设集团股份有限公司,湖南株洲412000

出　　处：《低温建筑技术》2022年第4期44-48,共5页Low Temperature Architecture Technology

摘　　要：为评价回收旧集料级配变异性,利用CVi和Wi对旧集料进行分析,明确了旧集料在服役期间变异性贡献主要筛孔为16、13.2、2.36mm和0.075mm。为改善级配变异性,采用细度模数进行合成级配设计,用贝雷法对级配进行检验,用P理论筛孔对贝雷法检验参数进行修正,最后利用K值对合成级配进行检验分析,得出了合成级配粗细集料有良好均匀性和骨架嵌挤结构的结论。To evaluate the gradation variability of recycled old aggregates,CVi and Wi were used to analyze the old aggregates.It was determined that the main mesh sizes contributing to the variability of used aggregates during service were 16mm,13.2mm,2.36mm and 0.075mm.The fineness modulus is adopted to improve the synthesis of gradation design,and it is verified by the bailey method whose test parameters are modified by the P mesh theory.Checked by the K value,the synthetic aggregate has good uniformity and skeleton embedded structures.

关 键 词：道路工程 热再生 合成级配 细度模数 贝雷法 

分 类 号：U414[交通运输工程—道路与铁道工程]