We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
临海既有混凝土氯离子侵蚀及钢筋初锈时间预测.
- Authors
张俊芝; 庄华夏; 伍亚玲; 刘如泰
- Abstract
Coastal concrete structures have very tough working environment with combined action of loads, chloride ion erosion and so on. According to the cores drilled from the concrete of one existing sluice pier along Oujiang river estuary region in Wenzhou, the mix proportion of the concrete was determined. Based on measured results of chloride concentration, the erosion regularity of chloride ion in the existing coastal concrete was analyzed, and the diffusion coefficients of the existing concrete and initial corrosion time of steel bars in the concrete were calculated by Pick's second law and the Monte Carlo method. The results show that obviously there exist the convective zones of chloride ion erosion in the 5 350 d concrete with thicknesses of exceeding 20 mm. Under the various actions, the resistance to chloride ion erosion in existing coastal concrete is reduced sharply, and the critical concentration range of chloride ion for steel bar's corrosion is 0- 12% to 0.18%, and the initial corrosion time is merely 3 000 d. The results show also the Monte Carlo method is a feasible method for analysis of the initial corrosion time of steel bars in the concrete in the nature chloride ion environment.
- Publication
Jianzhu Cailiao Xuebao: Journal of Building Materials, 2014, Vol 17, Issue 3, p454
- ISSN
1007-9629
- Publication type
Article
- DOI
10.3969/j.issn.1007-9629.2014.03.015