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Compressive Strength of Basic Magnesium Sulfate Cement Coral Aggregate Concrete(MCAC)on Non-Destructive Testing

查看全文 作　　者：GUO [1]Jianbo;YU [1]Hongfa;MA [1]Haiyan;CHANG [1]Yun;MEI [1]Qiquan;ZHANG [2]Yan 高影响力作者 机构地区：[1]Department of Civil and Airport Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China;[2]School of Architectural Engineering,Nanjing University of Engineering,Nanjing 210009,China高影响力机构 出　　处：《Journal of Wuhan University of Technology(Materials Science)》索引2023年第38卷第5期,共10页高影响力期刊 基　　金：Funded by National Natural Science Foundation of China(Nos.51878350,11832013,52078250);the Postgraduate Research&Practice Innovation Program of Jiangsu Province(No.KYCX21_0236)。 摘　　要：Basic magnesium sulfate cement coral aggregate concrete(MCAC)is a new type of concrete consisting of basic magnesium sulfate cement,coarse coral aggregate,coral reef sand and seawater.The rebound hammer(RH),the ultrasonic pulse velocity(UPV)and the compressive strength(fcu)tests of 14 sets of cube specimens of the MCAC after 28 d of aging were conducted.The impact of the content and length of sisal fiber on the relationship between the fcu-RH and the fcu-UPV was determined.A mathematical model was established to predict the strength of the MCAC using the UPV,RH,and comprehensive UPV/RH methods and to obtain the curves of test strength.The applicability of the test strength curves of ordinary portland concrete(OPC),light-weight aggregate concrete(LAC),and coral aggregate concrete(CAC)to MCAC was assessed.The results showed that the test strength curves of OPC,LAC and CAC were inappropriate to determine the strength of MCAC using non-destructive method.The relative standard error of the curves of test strength of the RH method and the comprehensive method met the specifications,whereas that of the UPV method did not. 关 键 词：non-destructive testing basic magnesium sulfate cement coral aggregate corcrete ultrasonic pulse velocity rebound hammer specific test strength curves
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