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Materials 2017, 10(1), 6; doi:10.3390/ma10010006

Concrete Cracking Prediction Including the Filling Proportion of Strand Corrosion Products

1
School of Civil Engineering and Architecture, Changsha University of Science & Technology, Changsha 410114, China
2
College of Civil Engineering and Mechanics, Xiangtan University, Xiangtan 411105, China
*
Author to whom correspondence should be addressed.
Academic Editors: Erik Schlangen and Chiang Joseph F.
Received: 21 October 2016 / Revised: 1 December 2016 / Accepted: 20 December 2016 / Published: 23 December 2016
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Abstract

The filling of strand corrosion products during concrete crack propagation is investigated experimentally in the present paper. The effects of stirrups on the filling of corrosion products and concrete cracking are clarified. A prediction model of crack width is developed incorporating the filling proportion of corrosion products and the twisting shape of the strand. Experimental data on cracking angle, crack width, and corrosion loss obtained from accelerated corrosion tests of concrete beams are presented. The proposed model is verified by experimental data. Results show that the filling extent of corrosion products varies with crack propagation. The rust filling extent increases with the propagating crack until a critical width. Beyond the critical width, the rust-filling extent remains stable. Using stirrups can decrease the critical crack width. Stirrups can restrict crack propagation and reduce the rust filling. The tangent of the cracking angle increases with increasing corrosion loss. The prediction of corrosion-induced crack is sensitive to the rust-filling extent. View Full-Text
Keywords: corrosion; strand; concrete; corrosion-induced cracking; corrosion products; filling extent corrosion; strand; concrete; corrosion-induced cracking; corrosion products; filling extent
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Wang, L.; Dai, L.; Zhang, X.; Zhang, J. Concrete Cracking Prediction Including the Filling Proportion of Strand Corrosion Products. Materials 2017, 10, 6.

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