[1]达波,余红发,麻海燕,等.全珊瑚海水混凝土的表面自由氯离子浓度和表观氯离子扩散系数[J].东南大学学报(自然科学版),2016,46(5):1093-1097.[doi:10.3969/j.issn.1001-0505.2016.05.033]
 Da Bo Yu Hongfa Ma Haiyan Zhang Yadong Tan Yongshan Mi Renjie Dou Xuemei.Surface free chloride concentration and apparent chloride diffusion coefficient of coral seawater concrete[J].Journal of Southeast University (Natural Science Edition),2016,46(5):1093-1097.[doi:10.3969/j.issn.1001-0505.2016.05.033]
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全珊瑚海水混凝土的表面自由氯离子浓度和表观氯离子扩散系数()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
46
期数:
2016年第5期
页码:
1093-1097
栏目:
材料科学与工程
出版日期:
2016-09-20

文章信息/Info

Title:
Surface free chloride concentration and apparent chloride diffusion coefficient of coral seawater concrete
作者:
达波1余红发1麻海燕1张亚栋2谭永山1糜人杰1窦雪梅1
1南京航空航天大学土木工程系, 南京 210016; 2解放军理工大学爆炸冲击防灾减灾国家重点实验室, 南京 210073
Author(s):
Da Bo1 Yu Hongfa1 Ma Haiyan1 Zhang Yadong2 Tan Yongshan1 Mi Renjie1 Dou Xuemei1
1Department of Civil Engineering, Nanjing University of Aeronautic and Astronautic, Nanjing 210016, China
2State Key Laboratory of Disaster Prevention and Mitigation of Explosion and Impact, PLA University of Science and Technology, Nanjing 210073, China
关键词:
全珊瑚海水混凝土 碱式硫酸镁水泥 暴露时间 表面自由氯离子含量 表观氯离子扩散系数
Keywords:
coral seawater concrete(CSC) magnesium sulfate cement exposure time surface free chloride concentration apparent chloride diffusion coefficient
分类号:
TU528
DOI:
10.3969/j.issn.1001-0505.2016.05.033
摘要:
采用不同种类水泥制备出不同强度等级的全珊瑚海水混凝土(CSC),研究其在海水浸泡环境下不同暴露时间的自由氯离子含量的分布规律,计算了CSC的表面自由氯离子含量和表观氯离子扩散系数,并探讨了暴露时间对这2个参数的影响规律.结果表明:在相同的暴露时间下,碱式硫酸镁水泥的抗Cl-扩散渗透能力优于普通硅酸盐水泥;CSC的表面自由氯离子含量随着暴露时间的延长而呈指数型增加,且增长速率远低于普通混凝土;CSC的表观氯离子扩散系数随着暴露时间的延长而呈幂函数型递减.因此,对于实际海洋环境下的CSC结构,建议采用碱式硫酸镁水泥,从而有利于提高抗Cl-扩散渗透能力,减缓Cl-的侵入速度,以达到延长结构服役寿命的目的.
Abstract:
Coral seawater concrete(CSC)with different strength grades were prepared by using different cements. The distribution laws of the free chloride concentrations of CSC in seawater environment with different exposure times were studied. The surface free chloride concentration and the apparent chloride diffusion coefficient of CSC were calculated and the corresponding influences of the exposure time were discussed. The results show that with the same exposure time, the ability to resist chloride diffusion of magnesium sulfate cement is better than that of ordinary cement. The surface free chloride concentration of CSC increases with the extension of the exposure time in an exponential form,and the growth rate is far lower than that of ordinary concrete. The apparent chloride diffusion coefficient of CSC decreases with the extension of the exposure time in a power function. Therefore, magnesium sulfate cement is recommended for actual CSC structures in marine environment, which can improve the ability to resist chloride diffusion and slow down the speed of chloride ion intrusion to prolong the service life of structures.

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备注/Memo

备注/Memo:
收稿日期: 2016-03-05.
作者简介: 达波(1988—),男,博士生;余红发(联系人),男,博士,教授,博士生导师,yuhongfa@nuaa.edu.cn.
基金项目: 国家重点基础研究发展计划(973计划)资助项目(2015CB655102)、国家自然科学基金资助项目(51508272)、江苏省普通高校研究生科研创新计划资助项目(KYLX15-0230).
引用本文: 达波,余红发,麻海燕,等.全珊瑚海水混凝土的表面自由氯离子浓度和表观氯离子扩散系数[J].东南大学学报(自然科学版),2016,46(5):1093-1097. DOI:10.3969/j.issn.1001-0505.2016.05.033.
更新日期/Last Update: 2016-09-20