Flexural behaviour of corroded reinforced concrete beams repaired with ultra-high toughness cementitious composite
Document Type
Journal Article
Publication Title
Construction and Building Materials
Publisher
Elsevier Ltd
School
School of Engineering
RAS ID
28735
Funders
Funding information available at https://doi.org/10.1016/j.conbuildmat.2019.03.214
Abstract
The repair of corroded reinforced concrete (RC) structures is necessary to improve their serviceability. Ultra-high toughness cementitious composite (UHTCC), characterised by excellent tensile behaviour, crack control capacity, and durability, shows great potential for the repair and strengthening of corroded members, especially in harsh marine environments. This paper presents an experimental study and a theoretical analysis of the flexural performance of corroded RC beams repaired with UHTCC. The experimental results indicated that macro cracks in concrete were transformed into multiple fine cracks and a slight nonlinear strain distribution was observed along the sectional depth. The replacement of damaged concrete with UHTCC can recover the initial load-carrying capacity at corrosion ratios within 11.2%. After yielding of beams, the development of UHTCC-concrete interface crack in the pure bending region was beneficial to ductility improvement. A theoretical model considering the effect of pitting corrosion was proposed for calculating flexural capacity of repaired beams.
DOI
10.1016/j.conbuildmat.2019.03.214
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Comments
Hou, L., Wang, J., Huang, T., Shen, C., Aslani, F., & Chen, D. (2019). Flexural behaviour of corroded reinforced concrete beams repaired with ultra-high toughness cementitious composite. Construction and Building Materials, 211, 1127-1137. Available here