石粉含量对机制砂混凝土性能影响的试验研究  

Experimental Study of Micro-fines Content's Effect on the Properties of Machine-made Sand Concrete

作　　者：张锦[1] 严捍东[2] 

机构地区：[1]漳州职业技术学院,福建漳州363000 [2]华侨大学土木工程学院,福建厦门361021

出　　处：《贵州大学学报（自然科学版）》2014年第6期103-108,共6页Journal of Guizhou University:Natural Sciences

基　　金：泉州市科技计划项目基金(2010G26)

摘　　要：本文通过研究不同石粉含量对C25、C45、C60花岗岩机制砂混凝土和易性、抗压强度、早期收缩变形、抗氯离子渗透性的影响,得出了不同强度等级混凝土机制砂中石粉的合理含量范围.试验结果表明：中低强混凝土（C25、C45）的合理石粉含量在11％ ～ 14％之间,高强混凝土（C60）的合理石粉含量在6％ ～9％之间.指出了机制砂中石粉含量超出现有国家标准关于强度等级低于C30、C30 ～ C60、高于C60的混凝土用机制砂石粉含量分别为7％、5％、3％的规定.This paper studies the effects of the different micro-fines content on C25, C45 and C60 granite ma- ehine-made sand concrete for workability, compressive strength, early shrinkage deformation and resistance to chloride ion penetration, which obtains different strength grade concrete on a reasonable content of micro-fines in machine-made sand. The experimental results show that： reasonable micro-fines content of low-strength concrete （C25） and strong-strength concrete （C45） are within 11% -14%, reasonable micro-fines content of high- strength concrete （C60） is within 6% -9%. It points out micro-fines content in machine-made sand beyond the existed National Standard about the regulation that micro-fines confent in machine-made sand used in concretes strength grade less C30,between C30 and C60,and higher than C60 is limited to 7% ,5% and 3%.

关 键 词：石粉含量 机制砂 混凝土性能 强度等级 

分 类 号：TU528.52[建筑科学—建筑技术科学]