基于图像处理技术的机制砂形貌及机制砂混凝土性能研究  

Research on the morphology of manufactured sand and the performance of manufactured sand concrete based on image processing technology

作　　者：郭耀雄 史星祥[2] 徐志军 张蕊 陈渊星 许志杨 刘远祥[2] 夏如茜 王海新 GUO Yaoxiong;SHI Xingxiang;XU Zhijun;ZHANG Rui;CHEN Yuanxing;XU Zhiyang;LIU Yuanxiang;XIA Ruxi;WANG Haixin(Suzhou Rail Transit Group Co.,Ltd.,Suzhou 215000,China;Suzhou Concrete and Cement Products Researoh Institute Co.,Ltd.,Jiangsu Engineering or Technology Research Center of High Concrete,Suzhou 215004,China)

机构地区：[1]苏州市轨道交通集团有限公司,江苏苏州215000 [2]苏州混凝土水泥制品研究院有限公司江苏省高耐久性混凝土工程技术研究中心,江苏苏州215004

出　　处：《混凝土与水泥制品》2023年第9期1-6,11,共7页China Concrete and Cement Products

基　　金：苏州市轨道交通集团有限公司科研项目(SZZG06YJ1060007);江苏省社会发展项目(BE2020780);苏州市民生科技项目(SS2019019)。

摘　　要：通过图像处理技术研究了影响机制砂颗粒形貌的主要因素及其与机制砂性能的相关性,分析了机制砂颗粒形貌对混凝土性能的影响。结果表明:用经过修正后的球形度指标评价机制砂颗粒形貌比圆形度更合理;使用立轴冲击破制备的机制砂颗粒形貌最好;母岩强度与颗粒形貌呈负相关关系;机制砂的球形度增加,其抵抗压碎的能力较高,且具有较低的空隙率;当球形度由53%提高至72%时,对中低强度等级机制砂混凝土的工作性改善效果显著,而对高强度等级机制砂混凝土的抗压强度改善效果显著。The main factors affecting the particle morphology of manufactured sand and their correlation with the performance of manufactured sand were studied through image processing technology,and the impact of manufactured sand morphology on concrete performance was analyzed.The results indicate that the modified sphericity index is more reasonable for evaluating the particle morphology of manufactured sand compared to circularity.The manufactured sand prepared by using vertical axis impact fracture has the best particle morphology.The strength of the parent rock is negatively correlated with the particle morphology.The sphericity of manufactured sand increases,resulting in higher resistance to crushing and lower porosity.When the sphericity increases from 53%to 72%,the workability of medium and low strength grade manufactured sand concrete is significantly improved,while the compressive strength of high strength grade manufactured sand concrete is significantly improved.

关 键 词：图像处理技术 机制砂 颗粒形貌 球形度 机制砂混凝土 性能 

分 类 号：TU528.041[建筑科学—建筑技术科学]