海蛎壳替代率对混凝土抗压强度的影响  

The Effect of Oyster Shell Replacement Rate on the Compressive Strength of Concrete

作　　者：张锦[1] 严捍东[2] ZHANG Jin;YAN Handong(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：《西昌学院学报（自然科学版）》2022年第4期79-84,共6页Journal of Xichang University(Natural Science Edition)

基　　金：福建省中青年教师教育科研项目(JAT201278)。

摘　　要：以C25天然砂混凝土为研究对象,通过研究同一强度等级不同替代率下的海蛎壳掺量对混凝土抗压强度的影响,得出混凝土28 d抗压强度值最大的海蛎壳替代率。与天然砂混凝土进行了比较并进行了机理分析,同时对混凝土抗压强度试验的破坏形态进行了机理分析。结果表明:海蛎壳混凝土的抗压强度值随海蛎壳替代率的增加而降低。总体上,海蛎壳替代后的混凝土强度符合强度等级标准要求,但海蛎壳混凝土的抗压强度值均低于天然砂混凝土。海蛎壳混凝土的破坏形态与海蛎壳掺量有关系,海蛎壳掺量越少,则混凝土破坏程度越剧烈。We take C25 natural sand concrete as the research object and study the effect of oyster shell content on the compressive strength of concrete at the same strength grade and with different replacement rates. The oyster shell replacement rate with the maximum compressive strength of concrete at 28 d is obtained and compared with natural sand concrete, and its mechanism is analyzed. Meanwhile, the failure mode of concrete compressive strength test is further analyzed. The results show that: the compressive strength of oyster shell concrete decreases with the increase of oyster shell replacement rate. In general, the strength of concrete replaced by oyster shell meets the requirements for strength grade standards, but the compressive strength of oyster shell concrete is lower than that of natural sand concrete. The failure mode of oyster shell concrete is related to the oyster shell content, and the less oyster shell content, the higher the damage degree of concrete.

关 键 词：海蛎壳替代率 海蛎壳掺量 混凝土 抗压强度 破坏形态 

分 类 号：TU528.52[建筑科学—建筑技术科学]