Szafran Jacek, Matusiak Artur, Rzeszut Katarzyna, Jankowiak Iwona
Department of Structural Mechanics, Faculty of Civil Engineering, Architecture and Environmental Engineering, Lodz University of Technology, Aleja Politechniki 6, 90-924 Łódź, Poland.
Institute of Building Engineering, Faculty of Civil and Transport Engineering, Poznan University of Technology, Piotrowo 5, 60-965 Poznań, Poland.
Materials (Basel). 2022 Apr 4;15(7):2652. doi: 10.3390/ma15072652.
"Polyurea coatings as a possible structural reinforcement system" is a research investigation that aims to explore the possible applications of polyurea coatings for improving structural performance (including steel, concrete, timber and other structures used in the construction industry). As part of the research in this field, this paper focuses on evaluating the performance of bending polyurea-coated reinforced concrete (RC) beams with a low reinforcement ratio. The easy application and numerous advantages of polyurea can prove very useful when existing RC structural elements are repaired or retrofitted. Laboratory tests of RC beams were performed for the purpose of this paper. The failure mechanisms and cracking patterns of these specimens are described, and their bending strengths were compared. On this basis, the effect of the coating on bending strength and the performance of the reinforced beams at the serviceability limit state (SLS) was examined and analyzed. The results showed that the use of a polyurea coating has a positive impact on the cracking and deflection state of RC beams and makes it possible to safely use RC elements on a continuous basis under high levels of load.
“聚脲涂层作为一种可能的结构增强系统”是一项研究调查，旨在探索聚脲涂层在改善结构性能（包括建筑行业中使用的钢、混凝土、木材及其他结构）方面的可能应用。作为该领域研究的一部分，本文重点评估了低配筋率的受弯聚脲涂层钢筋混凝土（RC）梁的性能。当对现有的RC结构构件进行修复或翻新时，聚脲易于施工且具有众多优点，这可能会被证明非常有用。为了本文的目的，对RC梁进行了实验室测试。描述了这些试件的破坏机制和裂缝模式，并比较了它们的抗弯强度。在此基础上，研究分析了涂层对抗弯强度的影响以及在正常使用极限状态（SLS）下加固梁的性能。结果表明，使用聚脲涂层对RC梁的开裂和挠曲状态有积极影响，并使得RC构件在高荷载水平下能够持续安全使用成为可能。
