矿物掺合料对海洋混凝土圆柱体性能的影响  

Effect of mineral admixtures on mechanical properties of ocean aggregate concrete

作　　者：姚如胜 陈宗平[2,3] YAO Rusheng;CHEN Zongping(College of Architecture Engineering,Beibu Gulf University,Qinzhou 535000,China;College of Civil Engineering and Architecture,Guangxi University,Nanning 530004,China;Key Laboratory of Disaster Prevention and Structural Safety of China Ministry of Education,Guangxi University,Nanning 530004,China)

机构地区：[1]北部湾大学建筑工程学院,广西钦州535000 [2]广西大学土木建筑工程学院,广西南宁530004 [3]广西大学工程防灾与结构安全教育部重点实验室,广西南宁530004

出　　处：《混凝土》2023年第10期111-115,共5页Concrete

基　　金：国家自然科学基金(51578163);广西壮族自治区八桂学者专项研究经费资助项目(桂政发2019【79】);广西研究生教育创新计划项目(YCBZ2019025)。

摘　　要：设计了54个海洋混凝土圆柱体试件进行轴压加载试验,考虑了拌养水、矿物掺合料和暴露龄期对其轴压力学性能的影响规律。观察了试件破坏形态与过程,获取了海洋混凝土应力-应变曲线和关键力学性能指标。结果表明:净水胶比小于0.35的海洋混凝土呈珊瑚骨料劈裂破坏;矿物掺合料可改善海洋混凝土的各项力学性能,其中复掺偏高岭土和硅灰的增强效果较好;淡水拌养海洋混凝土的延性总体上略大于海水拌养混凝土;暴露龄期(T<270 d)对海洋混凝土的力学性能影响规律不明显。In order to study the axial compression performance of ocean aggregate concrete(OAC)cylinder,54 OAC specimens were designed for loading test.These vary parameters are considered,such as mixed water,mineral admixture and exposure aged.The failure mode and process of the specimen were observed,and the stress-strain curve and key mechanical properties of OAC were obtained.The results show that OAC with water binder ratio less than 0.35 is cracked and damaged by coral aggregate.Mineral admixtures can improve the mechanical properties of OAC,and the reinforcement effect of metakaolin and silica fume is better.The ductility of fresh water mixed OAC is slightly higher than that of seawater mixed OAC.When the exposure age is less than 270 days,its influence on the mechanical properties of OAC is not obvious.

关 键 词：海洋混凝土 矿物掺合料 拌养水 暴露龄期 

分 类 号：TU528.041[建筑科学—建筑技术科学]