DETERIORATED PERFORMANCE OF REINFORCED CONCRETE BEAM CORRODED BY SULFATE AND CHLORIDE

Author(s): WU Qing, WANG Junhua, YUAN Yingshu
Paper category: Proceedings
Book title: Proceedings of CONSEC13 Seventh International Conference on Concrete under Severe Conditions - Environment and Loading Volume I
Editor(s): Z.J. Li, W. Sun, C.W. Miao, K.Sakai, O.E. Gjørv, N.Banthia
ISBN: 978-2-35158-124-7
e-ISBN: 978-2-35158-134-6
Publisher: RILEM Publications SARL
Publication year: 2013
Pages: 690-702
Total Pages: 961
Language : English

Abstract: This paper presents the results from an experimental and analytical research program investigating the deteriorated behavior of reinforced concrete beam subjected to sulfate and chloride environment. Ten reinforced concrete beams with 5 % NaCl soaking in 15% Na2SO4 were constructed to experience the degradation mechanism in terms of ductility, flexural carrying capacity and shear carrying capacity of test beam under different corrosion degree and corrosion rate by adopting the dry-wet-cycle accelerated corrosion method. Meanwhile, load-deflection curve, cracking load, shear cracking load, the bearing capacity and ductility of the concrete beams were also analyzed. The results indicated cracking load, shear cracking load, ductility, ultimate load and shear ultimate load of test beam corroded by sulfate and chloride developed compared to normal concrete beam not corroded by sulfate and chloride due to the early erosive products compact the internal structure of concrete, then mechanical properties of concrete beams declined with a deeper corrosion. Based on the experiment, the prediction models for cracking load, shear cracking load, ultimate load and ductility of test beam with different corrosion state were founded.

Online publication : 2013
Publication type : full_text
Public price (Euros) : 0.00