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Study on polymeric coatings on fly ash concrete under seawater

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Abstract

This study is focused on polymeric coatings on fly ash concrete submerged under seawater. The specimens were casted and coated with acrylic resin and epoxy resin of three layers each. The mechanical, durability, and microstructural properties of coated and uncoated fly ash concrete specimen were studied as pre- and post-exposed in seawater. Fly ash concrete coated with epoxy and acrylic had attained more strength compared to uncoated specimens. An increased strength in coated specimens and a decrease in value were observed in uncoated fly ash concrete specimens during split tensile strength. Coated specimens showed less reduction in pH value as compared to uncoated specimens. Rapid chloride permeability test (RCPT) analysis confirmed that epoxy and acrylic-coated concrete specimens appear to be denser than uncoated specimens leading to more resistance against the penetration of aggressive chemicals. The X-ray diffraction (XRD) comparative analysis of 56 and 90 days acrylic resin and epoxy resin-coated and uncoated specimen showed higher intensity in 90 days coated specimens than the uncoated specimens. Field emission scanning electron microscope (FESEM) investigation of uncoated 56 and 90 days concrete specimens subjected to seawater demonstrated dense appearance of hydrated products, whereas epoxy and acrylic-coated specimens were verified with no visible micro-cracks or holes on the surface, even at higher magnification. The epoxy and acrylic-coated fly ash concrete showed high physical strength and good bonding with concrete and will be appropriate for construction.

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All data generated or analyzed during this study are included in this published article.

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Acknowledgments

The authors acknowledge the Sathyabama Institute of Science and Technology for providing all the experimental facilities for this study.

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Authors and Affiliations

  1. Department of Civil Engineering, Sathyabama Institute of Science and Technology, Chennai, 600119, India

    Roselin Sobha Joseph Boopaphi & Manoj Kumaar Chandrasekaran

  2. Centre for Nanoscience and Nanotechnology, Sathyabama Institute of Science and Technology, Chennai, 600119, India

    Ramachandran Dasnamoorthy & Vinita Vishwakarma

Authors
  1. Roselin Sobha Joseph Boopaphi
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  2. Ramachandran Dasnamoorthy
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  3. Manoj Kumaar Chandrasekaran
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  4. Vinita Vishwakarma
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Contributions

RSJP was involved in the methodology and mechanical and durability properties of the concrete specimens. RD contributed on the methodology and microstructural analysis; MKC played a role on visualization and data curation; under VV supervision, conceptualization, design of the study, interpretation of the data, reviewing, and validation were completed.

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Correspondence to Vinita Vishwakarma.

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Responsible Editor: Santiago V. Luis

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Boopaphi, R.S.J., Dasnamoorthy, R., Chandrasekaran, M.K. et al. Study on polymeric coatings on fly ash concrete under seawater. Environ Sci Pollut Res 28, 9338–9345 (2021). https://doi.org/10.1007/s11356-020-11451-2

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  • DOI: https://doi.org/10.1007/s11356-020-11451-2

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