C45级原状机制砂混凝土试验研究  

Experimental study on properties of C45 concrete with proto-machine-made sand

作　　者：李凤兰[1] 朱倩[1] 徐阳洋[1] 

机构地区：[1]华北水利水电学院土木与交通学院,河南郑州450011

出　　处：《混凝土》2010年第2期84-86,共3页Concrete

基　　金：2009年郑州市科技领军人才资助项目

摘　　要：现行建筑用砂标准规定采用II类机制砂配制强度等级为C30~C60混凝土时,亚甲蓝试验合格时的石粉含量应小于5%,这往往限制了石粉含量超标的原状机制砂的工程应用。选用石粉含量为3%~16%的岩石破碎原状机制砂,通过试验研究了配制强度等级C45混凝土的可行性,分析了石粉含量对混凝土拌合物工作性能和混凝土基本力学性能的影响规律,提出了原状机制砂石粉含量限制的合理控制范围。According to the specification of current standard of Sand for Building,the limit content of stone powder in second class machine-made sand is 5% accompanying qualified methylene blue value to make up the concrete of grade from C30 to C60,it always confines the engineering application of proto-machine-made sand with extra-stone-powder.This paper uses the proto-machine-made sand containing stone powder with quality content from 3% to 16% to study the practicability of mixing concrete of grade C45.The influences of the content of stone powder on the workability of fresh concrete and the basic mechanical properties of concrete are analyzed,the reasonable range of the content of stone powder in proto-machine-made sand is proposed.

关 键 词：混凝土 机制砂 石粉含量 工作性能 抗压强度 抗拉强度 抗弯强度 弹性模量 

分 类 号：TU528.041[建筑科学—建筑技术科学]