Mechanical Properties of Railway High-strength Manufactured Sand Concrete: Typical Lithology, Stone Powder Content and Strength Grade  

作　　者：WANG Zhen LI Huajian HUANG Fali YANG Zhiqiang WEN Jiaxin SHI Henan 王振;李化建(Railway Engineering Research Institute,China Academy of Railway Science Corporation Limited,Beijing 100081,China;State Key Laboratory for Track Technology of High-Speed Railway,Beijing 100081,China)

机构地区：[1]Railway Engineering Research Institute,China Academy of Railway Science Corporation Limited,Beijing 100081,China [2]State Key Laboratory for Track Technology of High-Speed Railway,Beijing 100081,China

出　　处：《Journal of Wuhan University of Technology(Materials Science)》2025年第1期194-203,共10页武汉理工大学学报（材料科学英文版）

基　　金：Funded by the National Natural Science Foundation of China(Nos.U1934206,52108260);China Academy of Railway Sciences Fund(No.2021YJ078);Railway Engineering Construction Standard Project(No.2023-BZWW-006);New Cornerstone Science Foundation through the XPLORER PRIZE。

摘　　要：In order to achieve the large-scale application of manufactured sand in railway high-strength concrete structure,a series of high-strength manufactured sand concrete(HMC)are prepared by taking the manufactured sand lithology(tuff,limestone,basalt,granite),stone powder content(0,5%,10%,15%)and concrete strength grade(C60,C80,C100)as variables.The evolution of mechanical properties of HMC and the correlation between cubic compressive strength and other mechanical properties are studied.Compared to river sand,manufactured sand enhances the cubic compressive strength,axial compressive strength and elastic modulus of concrete,while its potential microcracks weaken the flexural strength and splitting tensile strength of concrete.Stone powder content displays both positive and negative effects on mechanical properties of HMC,and the stone powder content is suggested to be less than 10%.The empirical formulas between cubic compressive strength and other mechanical properties are proposed.

关 键 词：manufactured sand concrete RAILWAY mechanical property LITHOLOGY stone powder content 

分 类 号：U214.18[交通运输工程—道路与铁道工程]