Probabilistic carbonation life prediction for Li-lake tunnel based on properties of field concrete cover

Title: Probabilistic carbonation life prediction for Li-lake tunnel based on properties of field concrete cover
Author(s): M. Ba, C. Qian
Paper category : conference
Book title: International Conference on Microstructure Related Durability of Cementitious Composites
Editor(s): W. Sun, K. van Breugel, C. Miao, G. Ye and H. Chen
Print-ISBN: 978-2-35158-065-3
e-ISBN: 978-2-35158-084-4
Publisher: RILEM Publications
Publication year: 2008
Pages: 637 - 646
Total Pages: 10
Nb references: 12
Language: English

Abstract: The property of concrete cover is one of major factors which can guarantee the durability of concrete. In this paper the concrete cover thickness and ultrosonic pulse velocity for Li-Lake Tunnel have been measured by nondestructive testing. The results just conform to normal distribution. It also develops a conclusion that the CO2 concentration inside city tunnel is just twice or third time of that in normal air based on investigation. In addition, an optimized carbonation model has been chosen to relate the acclerating carbonation to the filed carbonating damage. Then the probabilistic carbonation service life of interior tunnel has been predicted according to the simulated linear relationship between ultrosonic pulse velocity and the accelerated carbonation depth. Finally, the tunnel could meet its designed 100 year service life, and its corresponding probability for sector a, b and c will be 82.6%, 85.31%, 90.32% respectively.

Online publication: 2009-06-09
Publication type : full_text
Public price (Euros): 0.00