Compressive behavior and microstructure of concrete mixed with natural seawater and sea sand

作     者：Qinghai XIE Jianzhuang XIAO Kaijian ZHANG Zhongling ZONG Qinghai XIE;Jianzhuang XIAO;Kaijian ZHANG;Zhongling ZONG

作者机构：Department of Structural EngineeringTongji UniversityShanghai 200092China School of Civil and Ocean EngineeringJiangsu Ocean UniversityLianyungang 222005China 

出 版 物：《Frontiers of Structural and Civil Engineering》 (结构与土木工程前沿（英文版）)

年 卷 期：2021年第15卷第6期

页      面：1347-1357页

核心收录：

学科分类：1305[艺术学-设计学（可授艺术学、工学学位）] 08[工学] 081304[工学-建筑技术科学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0813[工学-建筑学] 0814[工学-土木工程] 

基　　金：The authors would like to gratefully acknowledge the research grants from the China Postdoctoral Science Foundation(No.2020M681390) the Natural Science Foundation of the Jiangsu Higher Education Institutions of China(Nos.20KJB560020 and 19KJB560010) 

主　　题：seawater and sea sand concrete compressive strength strain field microstructure hydration products 

摘      要：Noncorrosive reinforcement materials facilitate producing structural concrete with seawater and sea *** study investigated the properties of seawater and sea sand concrete(SSC),considering the curing age(3,7,14,21,28,60,and 150 d)and strength grade(C30,C40,and C60).The compressive behavior of SSC was obtained by compressive tests and digital image correction(DIC)*** electron microscope(SEM)and X-ray powder diffraction(XRD)methods were applied to understand the microstructure and hydration products of cement in *** revealed a 30%decrease in compressive strength for C30 and C40 SSC from 60 to 150 d,and a less than 5%decrease for C60 from 28 to 150 *** results revealed significant cracking and crushing from 80%to 100%of compressive *** images showed a more compact microstructure in higher strength *** patterns identified Friedel’s salt phase due to the chlorides brought by seawater and sea *** findings in this study can provide more insights into the microstructure of SSC along with its short-and long-term compressive behavior.