海蛎壳掺量对天然砂混凝土和易性的影响研究  

The Influence of Oyster Shell Content on the Workability of Natural Sand Concrete

作　　者：张锦[1] 甘雨平 叶腾[1] 严捍东[2] ZHANG Jin;GAN Yu-ping;YE Teng;YAN Han-dong(School of Architectural Engineering,Zhangzhou Institute of Technology,Zhangzhou Fujian 363000,China;College of Civil Engineering,Huaqiao University,Xiamen Fujian 361021,China)

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

出　　处：《菏泽学院学报》2022年第5期69-73,共5页Journal of Heze University

基　　金：福建省中青年教师教育科研项目资助(JAT201278)。

摘　　要：以C25天然砂混凝土为研究对象,通过研究不同替代率下的海蛎壳掺量对混凝土和易性的影响,得出了海蛎壳在混凝土粗骨料中的合理替代率范围并进行机理分析,同时对和易性试验影响因素作了简要分析.试验研究结果表明:不同替代率下的混凝土坍落度随海蛎壳掺量的增加而降低,流动性逐渐降低,黏聚性先提高后逐渐降低,但总体上保水性较好,拌合物不泌水.混凝土和易性较好的海蛎壳合理替代率在5%~10%之间.Taking C25 natural sand concrete as the research object,this paper studies the influence of the content of oyster shell on the workability of concrete under different substitution rates,obtains the reasonable substitution rate range of oyster shell in the coarse aggregate of concrete,and carries out mechanism analysis.At the same time,the influencing factors of workability test are briefly analyzed.The results show that the slump of concrete under different substitution rates decreases with the increase of oyster shell content,the fluidity decreases gradually,the cohesiveness increases first and then decreases gradually,but the overall water retention is good,and the mixture does not bleed.The reasonable replacement rate of oyster shells in concrete with good workability is between 5%and 10%.

关 键 词：替代率 海蛎壳掺量 混凝土 和易性 

分 类 号：TU528.52[建筑科学—建筑技术科学]