[1] Zhu Ying, Wu Gang, Dong Zhiqiang, Wang Xin, et al. Experimental study on the durability of BFRP barsembedded in concrete [J]. Journal of Southeast University (English Edition), 2014, 30 (3): 323-329. [doi:10.3969/j.issn.1003-7985.2014.03.013]

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Experimental study on the durability of BFRP barsembedded in concrete()

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

Volumn:

30

Issue:

2014 3

Page:

323-329

Research Field:

Materials Sciences and Engineering

Publishing date:

2014-09-30

Info

Title:

Experimental study on the durability of BFRP barsembedded in concrete

Author(s):

Zhu Ying¹;  Wu Gang¹;  Dong Zhiqiang¹;  Wang Xin²;  Wu Zhishen²

¹Key Laboratory of Concrete and Prestressed Concrete Structures of Ministry of Education, Southeast University, Nanjing 210096, China.
² National and Local Unified Engineering Research Center for Basalt Fiber Production and Application Technology, Southeast University, Nanjing 210096, China.

Keywords:

concrete;  basalt fiber reinforced polymers(BFRP)bar;  durability;  alkalinity environment;  chloride environment;  acceleration factor

PACS:

TU502

DOI:

10.3969/j.issn.1003-7985.2014.03.013

Abstract:

This paper presents an experimental study on the alkali-resistant properties of basalt fiber reinforced polymers(BFRP)bars under a typical concrete environment. BFRP bars were embedded in concrete and exposed to different aggressive environments, including tap water, saline solution and ambient temperature environments, to study the effects of the type of solution and relative humidity(RH)on the durability of BFRP. Meanwhile, BFRP bars were directly immersed in an alkaline solution for comparison. The acceleration factor describing the relationship between the alkaline solution immersion and the moisture-saturated concrete was also obtained. Aging was accelerated with a temperature of 60 ℃. The results show that the chloridion in the saline solution does not have any harmful effects on the degradation of the concrete-encased BFRP bars. Contact with an alkaline(high pH)concrete pore-water solution is the primary reason for the degradation of the BFRP bars. The degradation rate of concrete-encased BFRP bars is accelerated when a high temperature and a high humidity are present simultaneously. The degradation rate of the BFRP bars is relatively quick at the initial stage and slows down with exposure time. Results show that the degradation of 2.18 years in moisture-saturated concrete at 60 ℃ corresponds to that of one year when directly immersed in an alkaline solution(other conditions remaining the same)for the BFRP bars analyzed.

References:

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Memo

Memo:

Biographies: Zhu Ying(1989—), female, graduate; Wu Gang(corresponding author), male, doctor, professor, g.wu@seu.edu.cn.
Foundation items: The National Key Basic Research Program of China(973 Program)(No.2012CB026200), the Key Project of Chinese Ministry of Education(No.113029A), the National Key Technology R& D Program of China during the 12th Five Year Plan Period(No.2011BAB03B09), the Fundamental Research Funds for the Central Universities.
Citation: Zhu Ying, Wu Gang, Dong Zhiqiang, et al. Experimental study on the durability of BFRP bars embedded in concrete[J].Journal of Southeast University(English Edition), 2014, 30(3):323-329.[doi:10.3969/j.issn.1003-7985.2014.03.013]

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