Mix design optimization of seawater sea sand coral aggregate concrete

作     者：SUN Li YANG ZeYu QIN RenYuan WANG Chao 

作者机构：School of Civil EngineeringShenyang Jianzhu UniversityShenyang 110168China School of Environment and Civil EngineeringDongguan University of TechnologyDongguan 523808China 

出 版 物：《Science China(Technological Sciences)》 (中国科学（技术科学英文版）)

年 卷 期：2023年第66卷第2期

页      面：378-389页

核心收录：

学科分类：0820[工学-石油与天然气工程] 08[工学] 0707[理学-海洋科学] 0818[工学-地质资源与地质工程] 081304[工学-建筑技术科学] 0903[农学-农业资源与环境] 0813[工学-建筑学] 0824[工学-船舶与海洋工程] 0814[工学-土木工程] 

基　　金：supported by the National Natural Science Foundation of China (Grant Nos.52078310,51878420) the Ministry of Science and Technology of China (Grant Nos.2018YFC1504303,2017YFC1503103) Xingliao Talent Program of Liaoning Province (Grant No.XLYC1902038)。 

主　　题：coral aggregate concrete sea sand seawater compressive strength failure mechanism mix proportion design 

摘      要：With the resource shortage in coastal areas,the construction of concrete structures using freshwater and river sand has brought great economic and environmental costs.The use of seawater,sea sand,and coral aggregates in concrete mixes has become an alternative solution for coastal and marine structures,especially for offshore structures and artificial islands.In this study,378 seawater,sea sand,and coral aggregate concrete(Coral-SWSSC)specimens were prepared,and their mechanical properties were investigated comprehensively through compressive tests to explore the optimized mix design at different grades.Results showed that the mechanical properties of Coral-SWSSC were strongly correlated with the water-to-binder ratios,coastal particle gradings,and pretreatment method of coastal particles.Based on the experimental results,mix proportion designs of CoralSWSSC were proposed for concrete from C20 to C50 grades,and the failure mechanism of Coral-SWSSC at different grades was discussed according to their respective failure modes.The findings of the current study provide knowledge on the optimized design of Coral-SWSSC,which can be used to promote the application of Coral-SWSSC in offshore,marine,and ocean engineering.