掺部分河砂活性粉末混凝土力学性能试验研究  

Experimental study on mechanical properties of reactive powder concrete with part of river sand

作　　者：刘楠楠 任义成 张猛 何达波 廖秋婷 曹霞[1] LIU Nannan;REN Yicheng;ZHANG Meng;HE Dabo;LIAO Qiuting;CAO Xia(College of Civil and Architecture Eingineering,Guilin University of Technology,Guilin 541004,China;Infrastructure Logistics Department,Guilin University of Technology,Guilin 541004,China;Construction Institute,Guangdong Technology College,Zhaoqing 526000,China)

机构地区：[1]桂林理工大学土木与建筑工程学院,广西桂林541004 [2]桂林理工大学基建后勤处,广西桂林541004 [3]广东理工学院建设学院,广东肇庆526000

出　　处：《混凝土》2023年第5期180-183,共4页Concrete

基　　金：国家自然科学基金(51368013);广西建筑新能源与节能重点试验室项目(桂科能19-J-21-2);广西中青年教师基础能力提升项目(2019KY0267)。

摘　　要：为探索掺部分河砂活性粉末混凝土的各项力学性能,研究了河砂替代部分相同粒径石英砂对活性粉末混凝土力学性能的影响,以及尺寸效应对掺部分河砂活性粉末混凝土抗压、劈裂抗拉强度的影响。结果表明,与未掺河砂活性粉末混凝土相比,掺部分河砂活性粉末混凝土的立方体、棱柱体及圆柱体抗压强度分别降低28.6%、30.5%、31.7%,抗弯强度降低27.3%;河砂对劈裂抗拉强度影响较小;尺寸效应对掺部分河砂活性粉末混凝土的立方体抗压、劈裂抗拉强度影响较小,对圆柱体抗压强度无明显的影响。In order to explore the mechanical properties of reactive powder concrete(RPC)with part of river sand,the effect of river sand replacing quartz sand with the same particle size on the mechanical properties of RPC had been studied in the present work.Influence of size effect on compressive and splitting tensile strength of RPC with part of river sand was investigated.The results demonstrated that compared with RPC without river sand,the compressive strength of cubic,prism and cylindrical of RPC with part of river sand decreased by 28.6%,30.5%and 31.7%,respectively,and the flexural strength was reduced by 27.3%.River sand affected little on the splitting tensile strength.The size effect had little effect on the cubic compressive strength and plitting tensile strength of RPC with part of river,and had no obvious effect on the cylinder compressive strength.

关 键 词：河砂 活性粉末混凝土 力学性能 尺寸效应 

分 类 号：TU528.01[建筑科学—建筑技术科学]