Research and Analysis on Long Life of Marine Concrete Structure in Bohai Gulf

被引：0
|
作者：
Ma H. [1 ]
Song S. [1 ]
Yu H. [1 ]
Sun Y. [2 ]
Xu Y. [3 ]
机构：
[1] Department of Civil Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing
[2] No.3 Engineering Company Ltd. of CCCC First Harbor Engineering Company, Dalian
[3] Nanjing Technical Vocational College, Nanjing
来源：
Jianzhu Cailiao Xuebao/Journal of Building Materials | 2023年 / 26卷 / 08期
关键词：
durability design; marine concrete structure; mineral admixtures; thickness of concrete steel reinforcement; water-binder ratio;
D O I：
10.3969/j.issn.1007-9629.2023.08.010
中图分类号：
学科分类号：
摘要：
Durability of concrete structures in marine engineering around Bohai Gulf was studied. According to the data obtained from a great series of experiments，the effect of mix design factors including different types of supplementary cementitious materials and different water-binder ratios on the life span of concrete structure in marine environment was carefully studied with the help of ChaDuraLife V1.0 life prediction model and software，which is developed on the base of reliability and modified chloride diffusion theory. The results show that the reduction in the water-binder ratio and the increment in content of fly ash and ground slag can effectively prolong the expected life span of marine concrete structures. Taking the concrete structure with the steel cover thickness of 75 mm in sea splash zone around Bohai Gulf as an example，the mix design which has the water-binder ratio of 0.30，fly ash content of 20% and slag content of 40% is corresponding to the longest life span of marine concrete. In this area，the minimum thickness of concrete steel reinforcement in this mix design corresponds to the life span of 100，200，500 a are 60，75，120 mm respectively. © 2023 Tongji University. All rights reserved.
引用
收藏
页码：897 / 905
页数：8
相关论文
共 27 条
  • [1] COLLEPARDI M, TURRIZZANI R., The kinetics of penetration of chloride ions into the concrete［J］, II Cemento, 4, pp. 157-164, (1970)
  • [2] MANGAT P S, LIMBACHIYA M C., Effect of initial curing on chloride diffusion in concrete repair materials［J］, Cement and Concrete Research, 29, 9, pp. 1475-1485, (1999)
  • [3] MAAGE M, POULSEN E，, Et al., Service life prediction of existing concrete structures exposed to marine environment ［J］, ACI Materials Journal, 93, 6, pp. 602-608, (1996)
  • [4] AMEY S L，, JOHNSON D A, MILTENBERGER M A, Et al., Predicting the service life of concrete marine structures：An environmental methodology［J］, ACI Structural Journal, 95, 2, pp. 205-214, (1998)
  • [5] KASSIR M K, GHOSN M., Chloride-induced corrosion of reinforced concrete bridge decks［J］, Cement and Concrete Research, 32, 1, pp. 139-143, (2002)
  • [6] MEJLBRO L., The complete solution of Fick’s second law of diffusion with time-dependent diffusion coefficient and surface concentration, Durability of Concrete in Saline Environment, pp. 127-158, (1996)
  • [7] Life-365 Service life prediction model and computer program for predicting the service life and life-cycle cost of reinforced concrete exposed to chlorides［M］, (2008)
  • [8] TANG L P., Engineering expression of the ClinConc model for prediction of free and total chloride ingress in submerged marine concrete［J］, Cement and Concrete Research, 38, 8, pp. 1092-1097, (2008)
  • [9] YU Hongfa, SUN Wei, YAN Lianghui, Et al., Study on prediction method of service life of concrete I—Theoretical model ［J］, Journal of the Chinese Ceramic Society, 30, 6, pp. 686-690, (2002)
  • [10] YU Hongfa, FENG Taotao, XU Mei, Et al., Durability assessment and preliminary design of 120-year life of Dalian bay submarine immersed tunnel structure［R］, (2017)
123