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Materials 2019, 12(6), 862; https://doi.org/10.3390/ma12060862

Rebar Corrosion Investigation in Rubber Aggregate Concrete via the Chloride Electro-Accelerated Test

1
School of Civil Engineering, Tianjin University, Tianjin 300072, China
2
Anhui & Huaihe River Institute of Hydraulic Research, Hefei 230088, China
3
School of Civil Engineering, Hebei University of Engineering, Handan 056038, China
*
Author to whom correspondence should be addressed.
Received: 24 January 2019 / Revised: 8 March 2019 / Accepted: 12 March 2019 / Published: 14 March 2019
(This article belongs to the Special Issue Corrosion of Reinforcing Steel in Reinforced Concrete)
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Abstract

Erosion effect of chloride ions from the marine, deicing salt, saline-alkali land and some industrial environments will cause the corrosion of rebar in concrete, which is one of the most harmful factors affecting the durability of concrete structure. It had been proved that the incorporation of rubber aggregates increase the capillary saturation of cement concrete and reduce the corrosion degree of rebar. This paper investigated the rebar corrosion behavior in rubber aggregate concrete under the chloride electro-accelerated corrosion condition and such an investigation has not been seen in any public literature. Two water-cement ratios (0.45 and 0.55) and four rubber contents (0, 50, 100, and 150 kg/m3) were selected for experiment. Four-point bending tests of concrete beam were conducted before and after chloride ion erosion in order to determine effect of rubber aggregate on the durability of rebar. Results showed that rebar corrosion degree decreased with the increase of rubber aggregate in concrete. Besides, the more the dosage of rubber is, the better the anti-crack performance of cement concrete. This will postpone the crack development and reduce the peak of rebar corrosion. View Full-Text
Keywords: rubber aggregate concrete; chloride ion diffusion; rebar corrosion; electro-accelerated corrosion test rubber aggregate concrete; chloride ion diffusion; rebar corrosion; electro-accelerated corrosion test
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Liang, J.; Zhu, H.; Chen, L.; Han, X.; Guo, Q.; Gao, Y.; Liu, C. Rebar Corrosion Investigation in Rubber Aggregate Concrete via the Chloride Electro-Accelerated Test. Materials 2019, 12, 862.

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