Elastomeric Polyurethane for Retrofitting Application of Concrete Structures under Dynamic Loadings

Author(s): Sudharshan N. Raman , H. M. Chandima C. Somarathna , Azrul A. Mutalib, and Khairiah H. Badri
Paper category: Proceedings
Book title: Proceedings of International Conferences (ICACMS) Advances in Construction Materials and systems Vol 2
Editor(s): Manu Santhanam, Ravindra Gettu, Radhakrishna G. Pillai, Sunitha K. Nayar
ISBN: 978-2-35158-194-0
e-ISBN: 978-2-35158-191-9
Publisher: RILEM Publications SARL
Publication year: 2017
Pages: 574-581
Total Pages: 8
Language : English

Abstract: This research was formulated to establish a feasible technique to improve the dynamic resistance and enhance the energy absorption capability of concrete structures, through an innovative approach of providing elastomeric polyurethane (PU) coating on the structural elements. This paper reports the findings of the experimental investigation conducted using scaled concrete specimens, to evaluate the contribution of PU coatings in enhancing the dynamic mechanical response of the specimens. Concrete specimens with dimensions of 160 mm × 40 mm × 40 mm were prepared, and a total of four different coating configurations were developed by coating PU on both tension and compression faces of the concrete specimen with the thicknesses of 2.5% and 5% to the specimen’s depth. Dynamic loading condition was simulated by conducting three-point bending test at an enhanced strain rate of 0.067 s-1, in comparison to quasi-static strain rate (0.00033 s-1). Findings indicated that the failure strain and strain energy density were enhanced by factors of 2.9-4.6, and 3.0-5.1 respectively with a marginal enhancement in the maximum flexural stress under dynamic conditions compared to un-coated specimens. In addition, it was noted that the response of concrete specimens was improved when the thickness of the PU coating was increased.

Online publication : 2017
Publication type : full_text
Public price (Euros) : 0.00