骨料粒型参数对超高泵送混凝土性能影响  

Effect of Aggregate Particle Shape Parameters on Performance of Ultra-high Pumping Concrete

作　　者：梁丽敏 焦岩 李世华 LIANG Li-min;JIAO Yan;LI Shi-hua(YCIH Green High-Performance Concrete Company Limited,Kunming 650501,China)

机构地区：[1]云南建投绿色高性能混凝土股份有限公司,昆明650501

出　　处：《价值工程》2021年第6期160-162,共3页Value Engineering

基　　金：云南省科技创新强省计划(2015AA022)。

摘　　要：基于显微图像分析技术,引入三维方向上细骨料粒型系数的建模及计算方法,对比分析机制砂、河砂及标准砂的粒型系数,研究了不同粒型机制砂、河砂对混凝土性能的影响。试验结果表明,三维方向上细骨料粒型系数可较好的表征细骨料粒型特征,使用粒型系数<4.0的细骨料配制的超高泵送混凝土可显著提高流动性降低粘度,满足泵送400m工作性指标要求,对于指导生产加工出粒型较好的机制砂改善超高泵送混凝土性能方面具有指导意义。Based on the microscopic image analysis technology,the modeling and calculation method of the shape coefficient of fine aggregate in the three-dimensional direction were introduced.By comparing and analyzing the particle form coefficient of machine-made sand,river sand and standard sand,this paper studies its influence on concrete performance.Grain shape coefficient<4.0 sand preparation of ultra-high pumping concrete can significantly improve liquidity to reduce the viscosity,meeting the requirements of pumping 400m workability index.It is of great significance to produce machine-made sand with good grain shape to improve the performance of ultra-high pumping concrete.

关 键 词：超高泵送混凝土 粒型参数 工作性 力学性能 

分 类 号：TU528[建筑科学—建筑技术科学]