全珊瑚骨料海水混凝土早期强度发展研究  

Study on early strength development of ACASC

作　　者：董朋杰 尹世平[1,2] 胡长顺 DONG Pengjie;YIN Shiping;HU Changshun(Jiangsu Key Laboratory of Environmental Impact and Structural Safety in Engineering,China University of Minging and Technology,Xuzhou 221116,China;State Key Laboratory for Geomechannics&Deep Underground Engineering,China University of Minging and Technology,Xuzhou 221116,China)

机构地区：[1]中国矿业大学江苏省土木工程环境灾变与结构可靠性重点实验室,江苏徐州221116 [2]中国矿业大学深部岩土力学与地下工程国家重点实验室,江苏徐州221116

出　　处：《混凝土》2023年第7期86-90,共5页Concrete

基　　金：江苏省重点研发计划(社会发展)项目(BE2019642)。

摘　　要：采用立方体抗压试验,研究不同试验材料用量对全珊瑚骨料海水混凝土(All coral aggregate seawater concrete,简称ACASC)立方体抗压强度的影响以及随养护龄期其抗压强度的发展规律。试验表明随着龄期增长ACASC强度增加,锥形破坏逐渐明显,延性有降低趋势;破坏时先从浆体与骨料交界面破坏,随后破坏面贯穿骨料;正交试验的极差分析结果表明ACASC 28 d抗压强度受水泥用量影响最为明显,受珊瑚骨料用量的影响最小,且其强度随水泥用量的增加而增加、随珊瑚骨料和人工海水用量增加呈先增加后减小的趋势;标准养护的ACASC试块3 d强度可以达到28 d的70%以上,7 d即可达到28 d的80%以上。The cube compressive test was used to study the influence of different test material dosage on the cube compressive strength of all coral aggregate seawater concrete(ACASC)and its development law with the curing age.The results show that with the increase of age,the strength of acasc increases,the conical failure is gradually obvious,and the ductility decreases.The failure starts from the interface between the slurry and the aggregate,and then the failure surface runs through the aggregate.The range analysis results of orthogonal test show that the 28 d compressive strength of acasc is most obviously affected by the amount of cement,and is least affected by the amount of coral aggregate,and its strength increases with the increase of the amount of cement,and first increases and then decreases with the increase of the amount of coral aggregate and artificial seawater.The strength of standard cured acasc test block can reach more than 70%of 28 days in 3 days and more than 80%of 28 days in 7 days.

关 键 词：全珊瑚海水混凝土 早期立方体抗压强度 配合比 

分 类 号：TU528.041[建筑科学—建筑技术科学]