Bio-Based Polyurethane Elastomer for Strengthening Application of Concrete Structures Under Dynamic Loadings

  • Sudharshan N. Raman
  • H. M. Chandima C. Somarathna
  • Azrul A. Mutalib
  • Khairiah H. Badri
  • Mohd. Raihan Taha
Conference paper

Abstract

Feasibility of application of a bio-based elastomeric polyurethane (PU) coating to improve the dynamic resistance of concrete specimens by enhancing their energy absorption capability was investigated. A series of experimental investigation were conducted using scaled concrete specimens with dimensions of 160 × 40 × 40 mm, which were coated with eight different coating configurations by varying the coating thickness and location. Three-point bending test was conducted under quasi-static and dynamic conditions, by varying the strain rates (0.00033 s−1 and 0.067 s−1). The maximum flexural stress, failure strain, and strain energy density characteristics were used to assess the effectiveness of the proposed retrofitting technique. Polymer layers of 1–4 mm thick provided 2.9–8.9 times enhancement in failure strain, 3.0–11.3 times enhancement in strain energy density, and a marginal enhancement in the maximum flexural stress under dynamic conditions compared to the dynamic response of uncoated concrete specimens. In addition, the dynamic response of concrete specimens was improved when the thickness of the PU coating was increased and when the coating was applied on both faces.

Notes

Acknowledgment

The authors would like to express their gratitude to the Ministry of Higher Education, Malaysia, and Universiti Kebangsaan Malaysia, for providing the necessary funding for this research through the FRGS Grant (FRGS/1/2015/TK01/UKM/02/1) and the ERGS Grant (ERGS/1/2013/TK03/UKM/02/6).

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Copyright information

© Springer International Publishing AG, part of Springer Nature 2018

Authors and Affiliations

  • Sudharshan N. Raman
    • 1
  • H. M. Chandima C. Somarathna
    • 2
    • 3
  • Azrul A. Mutalib
    • 3
  • Khairiah H. Badri
    • 4
  • Mohd. Raihan Taha
    • 3
  1. 1.Department of ArchitectureUniversiti Kebangsaan MalaysiaBangiMalaysia
  2. 2.Department of Civil EngineeringUniversity of JaffnaJaffnaSri Lanka
  3. 3.Department of Civil and Structural EngineeringUniversiti Kebangsaan MalaysiaBangiMalaysia
  4. 4.School of Chemical Sciences and Food TechnologyUniversiti Kebangsaan MalaysiaBangiMalaysia

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