Polyurethane grout as repair material for concrete structures: Performance evaluation
Sadi Ibrahim HARUNA, Yasser E. IBRAHIM, Abdurra’uf M. GORA, M.N. IBRAHIM
Abstract. The effectiveness of repair work relies on whether the interface substrate can achieve sufficient bond strength when subjected to numerous stresses. This study investigated the bond properties of repaired normal concrete (NC-to-NC) elements, including cube, beam, and U-shaped specimens, after undergoing natural fracture due to flexural and tensile stresses. The specimens were repaired using a polyurethane (PU) matrix by gluing the two parts and tested for compression, splitting, and impact tests to evaluate the bond strength properties. The result revealed that the PU matrix effectively repairs NC substrate with adequate bond strength, which exceeds the minimum allowable bond strength specified by the ASTM ACI 546-06 for rehabilitation of impaired concrete structure. The reference beams exhibit the highest ultimate load capacity of 15.6kN with lower deflection than the repaired specimens. The mean number of blows at the cracking stages appeared nearly equal for both reference and repaired NC-to-NC specimens. The reference specimens exhibit an average number of 24 blows and 31 blows at the first and failure stages, respectively, which are higher than that of NC-to-NC repaired specimens by 9.1% and 5.2%. Indicating the effectiveness of the PU matrix in bonding the two pieces together with high strength under repeated impact loads.
Keywords
Polyurethane Grout, Concrete, Bond Strength, Drop-Weight Impact Test, Repair
Published online 2/25/2025, 8 pages
Copyright © 2025 by the author(s)
Published under license by Materials Research Forum LLC., Millersville PA, USA
Citation: Sadi Ibrahim HARUNA, Yasser E. IBRAHIM, Abdurra’uf M. GORA, M.N. IBRAHIM, Polyurethane grout as repair material for concrete structures: Performance evaluation, Materials Research Proceedings, Vol. 48, pp 569-576, 2025
DOI: https://doi.org/10.21741/9781644903414-62
The article was published as article 62 of the book Civil and Environmental Engineering for Resilient, Smart and Sustainable Solutions
Content from this work may be used under the terms of the Creative Commons Attribution 3.0 license. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.
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