Study on service life of coastal concrete structures based on the chloride ion penetration

Title: Study on service life of coastal concrete structures based on the chloride ion penetration
Author(s): Weilun Wang, Han Lu, Wujian Long, Feng Xing, Ningxu Han
Paper category : conference
Book title: 2nd International Symposium on Service Life Design for Infrastructures
Editor(s): K. van Breugel, Guang Ye, Yong Yuan
Print-ISBN: 978-2-35158-096-7
e-ISBN: 978-2-35158-097-4
Publisher: RILEM Publications SARL
Publication year: 2010
Pages: 369 - 376
Total Pages: 8
Nb references: 5
Language: English

Abstract: Degradation of concrete structures, specially caused by corrosion of reinforcement due to chloride ion penetration becomes the main factor which affects the service life of coastal concrete structures. To ensure the concrete structures perform well within the targeted service life, factors which could affect the chloride diffusion process, such as diffusion coefficient, compressive strength, water binder ratio (w/b), fly ash, and ages of concrete were discussed based on the research of high-strength bare concrete structure of Vanke Center (Shenzhen, China), which situates in a maritime environment. Furthermore, on the basis of the analysis of the concrete deterioration model, the service life design was carried out under the principle of PRSLD framework (Performance and Reliability based Service Life Design). The results show that the concrete exhibited excellent surface anti-permeability performance. with a chloride diffusion coefficient value of 2.93×10-12m2/s at 28 days obtained from in-situ concrete and a value of 1.71×10-12m2/s at 28 days obtained in the laboratory). Based on the test results, the design performance was fully satisfied and the excepted service life can be ensured.

Online publication: 2011-04-20
Publication type : full_text
Public price (Euros): 0.00