Protective polyurea coatings for enhanced blast survivability of concrete

Iqbal, Nahid; Sharma, Pratibha; Kumar, Devendra; Roy, Prasun Kumar

doi:10.1016/j.conbuildmat.2018.04.204

Cited by 127 publications

(46 citation statements)

References 34 publications

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“…Papers [ 17 , 18 , 19 , 20 , 21 ] focus on analyzing the effect of a polyurea coating on components of ballistic equipment (such as protective helmets or aluminum and steel plates). Papers [ 22 , 23 , 24 , 25 , 26 ] describe how composite (polymer) materials protect specific structural components against the effects of an explosion. In contrast to numerous studies on the properties of polyurea coatings, only a small number of papers can be found in the literature that focus on the use of polyurea to improve the performance of structural elements.…”

Section: Introductionmentioning

confidence: 99%

Influence of Polyurea Coatings on Low-Longitudinal-Reinforcement-Ratio Reinforced Concrete Beams Subjected to Bending

et al. 2022

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“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.

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Section: Introductionmentioning

confidence: 99%

Influence of Polyurea Coatings on Low-Longitudinal-Reinforcement-Ratio Reinforced Concrete Beams Subjected to Bending

et al. 2022

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“…The results demonstrated that the polyurea resin covered the fragments generated by the explosion, and thus, the walls could withstand a stronger explosion impact. Many researchers have studied the effect of polyurea coatings on the explosion and impact resistance of concrete and steel structures based on these studies (Lqbal et al, 2018;McShane et al, 2008;Takeuchi et al, 2015). Amini et al (2010aAmini et al ( , 2010b investigated the impact response of steel sheets coated with polyurea resin and confirmed improved impact resistance due to the coating.…”

Section: Introductionmentioning

confidence: 99%

Reinforcing effect of polyurea resin coating on RC members subject to low-speed and medium-speed impact

Sonoda

Tamai

Ifuku

et al. 2022

Advances in Structural Engineering

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Polyurea resin is widely used as a coating material for various structures owing to its relatively high strength and elongation ability along with applicability in improving the impact and explosion resistance of structures has been studied. Civil engineering structures are generally subjected to relatively low-speed impact loads, such as collisions with vehicles, falling rocks, and flying objects caused by typhoons. However, the reinforcing effect of polyurea resin against low-speed impact loads has not been well studied. The objective of this study is to understand the reinforcing effect of polyurea resin coating on RC members against low-speed and medium-speed impact loads and to evaluate its effectiveness. We conducted low-speed and medium-speed repeated impact tests using a falling weight and flying object on RC cantilevers and slabs coated with polyurea resin, respectively. In addition, numerical simulations were performed using the FEM to qualitatively reproduce the experiments. The results of the low-speed impact test showed that there was no significant reinforcing effect under the first impact. However, when the number of impacts increased, the maximum displacement was significantly suppressed; thus, the improvement of the impact absorption performance was confirmed. In addition, by coating the back side of the RC slab, the prevention of the scattering of concrete pieces was verified in the medium-speed repeated impact test.

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“…Given that many of the significant mechanical properties of the polyurea are particularly observed at high strain rates, many studies have been conducted on the mechanical properties of the polyurea at high strain rates 13 . For example, the use of polyurea as a coating to improve the survival of the structures during fast loadings is expanding, which is an example regarding the importance of studying the behavior of this polymer at high strain rates 14 . These include the excellent potential of the polyurea to reduce the effects of explosive waves and its advantages compared to the other methods available in achieving this goal 15 .…”

Section: Introductionmentioning

confidence: 99%

A review on the applications of polyurea in the construction industry

Shojaei

Najafi

Yazdanbakhsh

et al. 2021

Polymers for Advanced Techs

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Polyurea has drawn the attention of construction activists and engineers as a modern building material due to its unique structure, unique properties, and relatively easy application even in hard‐to‐reach places. A wide range of excellent properties such as durability and high resistance against the atmospheric, chemical, and biological factors have made this polymer a superb option for the construction industry. The ability to reinforce the building materials and structures coupled with excellent resistance against corrosion and abrasion has dramatically increased the popularity of polyurea as a protective coating in the construction industry. In these industries, sealing and insulating the different floors and surfaces have also been considered using the polyurea coating. Polyurea coating technology is a green technology without pollution and toxicity to the environment, which is an essential advantage over many competing technologies in the construction industry. The use of polyurea composite systems to optimize various properties such as mechanical and thermal properties in addition to reducing the costs and economic burden is increasing. In the present paper, multiple applications of polyurea‐based materials in the construction industry are discussed.

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Protective polyurea coatings for enhanced blast survivability of concrete

Cited by 127 publications

References 34 publications

Influence of Polyurea Coatings on Low-Longitudinal-Reinforcement-Ratio Reinforced Concrete Beams Subjected to Bending

Influence of Polyurea Coatings on Low-Longitudinal-Reinforcement-Ratio Reinforced Concrete Beams Subjected to Bending

Reinforcing effect of polyurea resin coating on RC members subject to low-speed and medium-speed impact

A review on the applications of polyurea in the construction industry

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