NDLI: Long-term behavior of fiber reinforced concrete exposed to sulfate solution cycling in drying-immersion

Content Provider	Springer Nature Link
Author	Geng, Yongjuan Jin, Zuquan Hou, Baorong Zhao, Tiejun Gao, Song
Copyright Year	2017
Abstract	The damage process and corrosion ion distribution in concrete, which was exposed to 60 and 170 drying-immersion cycles of sulfate solution, were systematically investigated. The effects of plain concrete, plain concrete mixed with 4 and 8 kg/m$^{3}$ modified PP fiber and high-performance concrete (HPC) mixed with 0.8 kg/m$^{3}$ fine PP fiber on the damage process were also studied. The experimental results showed that thenardite-induced surface scaling, as well as gypsum- and ettringite-induced cracks, were the main degradation forms of concrete under attack of sulfate solution and drying–immersion cycles. The relative dynamic modulus of elasticity of concrete initially increased, then reached stability and finally decreased to failure. The sulfate diffusion coefficients of plain and HPC were 10$^{-12}$ and 10$^{-13}$ m$^{2}$/s, respectively. The concentration of sodium ion increased with depth, then maintained stability and finally decreased rapidly with concrete depth. The content of calcium ion on the concrete surface was 110%-150% of that in the interior of specimens. Although fiber worsened the surface scaling of concrete, better resistance capacity of sulfate ion penetration into concrete was observed in plain concrete with 4 kg/m$^{3}$ modified PP fiber and HPC.
Starting Page	875
Ending Page	881
Page Count	7
File Format	PDF
ISSN	10002413
Journal	Journal of Wuhan University of Technology-Mater. Sci. Ed.
Volume Number	32
Issue Number	4
e-ISSN	19930437
Language	English
Publisher	Wuhan University of Technology
Publisher Date	2017-07-28
Publisher Place	Wuhan
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	fiber reinforced concrete sulfate ion damage diffusion coefficient drying-immersion cycles Materials Science
Content Type	Text
Resource Type	Article
Subject	Materials Science

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