粗集料性质对素混凝土抗压强度的影响  

Effect of Coarse Aggregate Properties on Compressive Strength of Plain Concrete

作　　者：任秉龙 REN Bin-long(Shanxi Traffic Construction Engineering Quality Inspection Center(Ltd),Taiyuan 030006,China)

机构地区：[1]山西省交通建设工程质量检测中心(有限公司),山西太原030006

出　　处：《兰州工业学院学报》2019年第4期36-39,46,共5页Journal of Lanzhou Institute of Technology

摘　　要：为研究粗集料不同性质对素混凝土力学性能影响,采用室内试验方法,针对粗集料不同级配分维数、体积分数、粗集料种类及粗集料针片状含量对混凝土抗压强度的影响规律展开分析.研究表明:粗集料级配分维数为2.6时,混凝土抗压强度性能最佳;粗集料体积分数小于50%时,增大粗集料体积分数可有效增强混凝土抗压强度;中期和后期玄武岩碎石作为粗集料对于提高混凝土抗压强度最佳;粗集料针片状含量超过10%后,增大针片状含量会大大降低混凝土抗压强度.In order to study the influence of different properties of coarse aggregate on the mechanical properties of plain concrete,the laboratory test method is adopted,aiming to analyze the different fractal dimension and volume fraction of coarse aggregate,the influence of coarse aggregate type and coarse aggregate needle content on the compressive strength of concrete.The results show that:1)when the partition dimension of coarse aggregate grade is 2.6,the compressive strength is the strongest and the mechanical properties of concrete are the best;2)when the volume fraction of coarse aggregate is less than 50%,the mechanical properties of concrete can be effectively enhanced by increasing the volume fraction of coarse aggregate;3)when basalt gravel is used as coarse aggregate in the middle and late stages,it is the best to improve the mechanical properties of concrete;4)the mechanical properties of concrete can be greatly reduced by increasing the content of needle sheet when the content of material needle is more than 10%.

关 键 词：粗集料 级配分维数 体积分数 针片状颗粒 

分 类 号：U414[交通运输工程—道路与铁道工程]