基于粒形分析的再生细骨料颗粒特性和制备砂浆性能研究  

Particle Characteristics of Recycled Fine Aggregate and Properties of Prepared Mortar Based on Particle Shape Analysis

作　　者：石艳柯 张洛兵 王宇航 刘巍巍[2] 侯荣彬 马军涛 SHI Yanke;ZHANG Luobing;WANG Yuhang;LIU Weiwei;HOU Rongbin;MA Juntao(School of Civil Engineering and Communication,North China University of Water Resources and Electric Power,Zhengzhou 450045,China;MWR Center for Levee Safety and Disease Prevention Research,Yellow River Institute of Hydraulic Research,Zhengzhou 450003,China)

机构地区：[1]华北水利水电大学土木与交通学院,郑州450045 [2]黄河水利科学研究院,水利部堤防安全与病害防治工程技术研究中心,郑州450003

出　　处：《硅酸盐通报》2021年第12期4061-4069,共9页Bulletin of the Chinese Ceramic Society

基　　金：国家自然科学基金(11502081,52004098);水利部堤防安全与病害防治工程技术研究中心开放课题(DFZX202008,2019005);河南省重点研发与推广专项(212102310951)。

摘　　要：运用数字图像技术分析再生细骨料的颗粒形貌参数,以此为基础对再生细骨料的堆积密度、吸水率、压碎值等颗粒特性开展研究,并对再生细骨料制备水泥砂浆的工作性能和力学性能进行了分析。实验结果表明,再生细骨料与同级配的标准砂和天然河砂相比,钝度、长宽比、坚固度和球度等指标均相对较低,压碎值和吸水率显著增加;使用再生细骨料制备水泥砂浆时,质量替代量达到30%时流动度明显下降,质量替代量达到40%时抗压强度和峰值应力显著下降。Based on the analysis of the particle morphology parameters of recycled fine aggregate by the digital image technology, the particle characteristics such as bulk density, water absorption and crushing value of recycled fine aggregate were studied, and the workability and mechanical properties of cement prepared with the recycled fine aggregates were analyzed. The results show that compared with the standard sand and natural river sand at the same grade, the parameters such as dullness, aspect ratio, solidity and roundness of recycled fine aggregate are decreased, and the crushing value and water absorption are significantly increased. The fluidity of the prepared cement mortar with recycled fine aggregate decreases significantly when the mass substitution amount of recycled fine aggregate reaches 30%, and the compressive strength and peak stress decrease significantly when the mass substitution amount of recycled fine aggregate reaches 40%.

关 键 词：再生细骨料 颗粒形貌 颗粒特性 砂浆 流动度 抗压强度 

分 类 号：TU528[建筑科学—建筑技术科学]