[1] Ba Mingfang, Qian Chunxiang, Huang Lei,. Probabilistic method and its applicationfor evaluating carbonation life of newly-built concrete structures [J]. Journal of Southeast University (English Edition), 2010, 26 (4): 578-581. [doi:10.3969/j.issn.1003-7985.2010.04.016]

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Probabilistic method and its applicationfor evaluating carbonation life of newly-built concrete structures()

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Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]

Volumn:

26

Issue:

2010 4

Page:

578-581

Research Field:

Materials Sciences and Engineering

Publishing date:

2010-12-30

Info

Title:

Probabilistic method and its applicationfor evaluating carbonation life of newly-built concrete structures

Author(s):

Ba Mingfang;  Qian Chunxiang;  Huang Lei

School of Materials Science and Engineering, Southeast University, Nanjing 211189, China
Jiangsu Key Laboratory of Construction Materials, Nanjing 211189, China

Keywords:

probabilistic carbonation life;  newly-built structure;  concrete-cover quality

PACS:

TU528.01

DOI:

10.3969/j.issn.1003-7985.2010.04.016

Abstract:

In order to evaluate the carbonation life of newly-built concrete structures, two kinds of nondestructive methods are adopted to test the thickness of the concrete cover and the ultrasonic velocity of two newly-built tunnel structures. Simultaneously a probabilistic method is proposed based on the relationship between the accelerated carbonation rate and the ultrasonic velocity. This proposed method is applied to evaluate the carbonation related lives of two newly-built tunnels and the results indicate that even under nearly the same environment and CO₂ combining conditions, there exits a big difference in the probabilistic carbonation lives between the two tunnels; i.e., the probabilistic lives of Tunnel A and Tunnel B are 94.0% and 82.3% and the corresponding maximum discrepancies are 11.6% and 27.0%, respectively. Thus, it can be concluded that the scattered quality of the concrete cover is attributed to the differences in construction technique, which eventually leads to the diversity in the evaluated probabilistic carbonation lives of the two tunnels.

References:

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[9] Ba M F, Qian C X. Probabilistic carbonation life prediction for Li-Lake tunnel based on properties of field concrete cover [C]//Proc of the International Conference of Microstructure Related Durability of Cementitious Composites. Nanjing, China, 2008: 637-646.
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Memo

Memo:

Biographies: Ba Mingfang(1975—), female, graduate; Qian Chunxiang(corresponding author), female, doctor, professor, cxqian@seu.edu.cn.
Foundation items: Key Construction Project of Nanjing Yangtze River Tunnel(No.7612005822), the National Basic Research Program of China(973 Program)(No.2009CB623203).
Citation: Ba Mingfang, Qian Chunxiang, Huang Lei. Probabilistic method and its application for evaluating carbonation life of newly-built concrete structures[J].Journal of Southeast University(English Edition), 2010, 26(4):578-581.

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