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Bond of Seawater Scoria Aggregate Concrete to stainless Reinforcement

Journal of Renewable Materials 2023年第1期11卷 209-231页

作者： Lei Yin Yijie Huang Yanfei Dang Qing Wang Shandong Key Laboratory of Civil Engineering Disaster Prevention and Mitigation Shandong University of Science and TechnologyQingdao266590China

This study investigates the bond between seawater scoria aggregate concrete(SSAC)and stainless reinforcement(SR)through a series of pull-out tests.A total of 39 specimens,considering five experimental parameters—con-crete type(SSAC,ordinary concrete(OC)and seawater coral aggregate concrete(SCAC)),reinforcement type(SR,ordinary reinforcement(OR)),bond length(3,5 and 8 times bar diameter),concrete strength(C25 and C30)and concrete cover thickness(42 and 67 mm)—were *** typical bond properties(failure pattern,bond strength,bond-slip curves and bond stress distribution,etc.)of seawater scoria aggregate concrete-stainless rein-forcement(SSAC-SR)specimen were systematically ***,the failure pattern changed with the con-crete type used,and the failure surface of SSAC specimen was different from that of OC *** enhanced the bond strength of specimen,while its effect on the deformation of SSAC-SR was *** aver-age,the peak slip of SSAC specimens was 20%lower while the bond strength was 6.7%higher compared to OC specimens under the similar *** effects of variables on the bond strength of SSAC–SR in increasing order are concrete type,bond length,concrete strength and cover *** bond-slip curve of SSAC-SR specimen consisted of micro-slipping,slipping and declining *** can be obtained that SSAC reduced the curve curvature of bond-slip,and the decline of curve became steep after adopting *** typical distribution of bond stress along bond length changed with the types of concrete and reinforcement ***,a specific expression of the bond stress-slip curve considering the effects of various variables was established,which could provide a basis for the practical application of reinforced SSAC.

关键词： Bond properties seawater scoria aggregate concrete stainless reinforcements bond-slip curve bond stress distribution analytical model

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