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<p>This study experimentally investigates the flexural strength of EPS-sandwiched concrete panels when exposed to acid and sulphate attacks. The testing involved EPS panels with 1000 × 600 × 130&#xa0;mm dimensions reinforced with 50&#xa0;mm square welded wire mesh. The acid and sulphate environments were created through continuous immersion in sulphuric acid (H<sub>2</sub>SO<sub>4</sub>) and sodium sulphate (Na<sub>2</sub>SO<sub>4</sub>) solutions. The Non-destructive Technique (NDT) of Acoustic Emission (AE) was used to correlate the residual flexural strength of the panels by recording the transient elastic waves generated during flexural testing. The study analyzed AE parameters, including cumulative AE hits, amplitudes, Rise Angle (RA), and Average Frequency (AF), and correlated them with the mechanical properties of the panels. The results showed that the load–deflection characteristics of acid and sulphate-exposed EPS panels under flexural loading coincided with the AE monitoring parameters of AE hits and their amplitudes. Plots of RA vs AF were found to be good indicators of the type of cracks in EPS panels when subjected to aggressive environments.</p>

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Mechanical and AE Evaluation of the EPS Panels Exposed to Acid and Sulphate Environments

  • 期刊论文

  • 发表日期：

    2025年2月13日

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  • Anil Garhwal,
  • Shruti Sharma,
  • A. B. Danie Roy

摘要

This study experimentally investigates the flexural strength of EPS-sandwiched concrete panels when exposed to acid and sulphate attacks. The testing involved EPS panels with 1000 × 600 × 130 mm dimensions reinforced with 50 mm square welded wire mesh. The acid and sulphate environments were created through continuous immersion in sulphuric acid (H2SO4) and sodium sulphate (Na2SO4) solutions. The Non-destructive Technique (NDT) of Acoustic Emission (AE) was used to correlate the residual flexural strength of the panels by recording the transient elastic waves generated during flexural testing. The study analyzed AE parameters, including cumulative AE hits, amplitudes, Rise Angle (RA), and Average Frequency (AF), and correlated them with the mechanical properties of the panels. The results showed that the load–deflection characteristics of acid and sulphate-exposed EPS panels under flexural loading coincided with the AE monitoring parameters of AE hits and their amplitudes. Plots of RA vs AF were found to be good indicators of the type of cracks in EPS panels when subjected to aggressive environments.