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Evaluate high-temperature degradation of different concrete types using imaging methods.

January 14, 2026

Image-based assessment of high-temperature degradation of fibre-reinforced sustainable concrete

Key Points

Evaluate high-temperature degradation of different concrete types using imaging methods.
Applied imaging techniques to assess concrete degradation under high temperatures.
Cured concrete specimens exposed to temperatures from ambient to 800 °C.
Used ImageJ software to analyze digital images for colour characteristics.
Identified strong correlation of hue with compressive strength in OPCC and MBCC.
Moderate correlation found for FRMBCC, with varying saturation and intensity effects across concrete types.
Demonstrated imaging potential for non-destructive concrete condition assessments.

Abstract

The work applies an imaging-based approach to evaluate the degradation of concrete subject to high-temperature conditions, providing information on non-destructive assessment methodologies based on colour characteristics. Specifically, it investigates the potential of using the hue, saturation, and intensity (HSI) colour space to quantify the thermal deterioration of ordinary Portland cement concrete (OPCC) of M30 grade, multi-component binder-based cement concrete (MBCC), and fibre-reinforced multi-component binder-based cement concrete (FRMBCC). Concrete cube specimens of OPCC, MBCC, and FRMBCC are cured for 28 days and exposed to various temperatures like ambient room temperature, 100 °C, 400 °C, 600 °C, and 800 °C. These specimens are photographed under medium light indoor (MLI) lighting conditions for analysis. Digital images of the concrete surfaces are captured and analyzed using ImageJ software to extract RGB values, then converted into HSI colour parameters. The compressive strength of the specimens is evaluated at different temperature exposures to establish correlations between the HSI values and the residual compressive strength. The results demonstrate that the hue parameter exhibits strong correlations with residual compressive strength for OPCC and MBCC, while FRMBCC showed a moderate correlation. The saturation parameter displayed a moderate correlation for OPCC, MBCC, and FRMBCC. The intensity parameter displayed an excellent correlation for OPCC and a reasonably moderate correlation for MBCC and FRMBCC. The study demonstrates the application of the hue–saturation–intensity (HSI) colour space for evaluating concrete deterioration, with different concrete types showing varying levels of fit between data points and polynomial curves. These findings support imaging-based non-destructive evaluation techniques for assessing the condition of concrete structures based on their colour attributes, which could lead to more efficient and cost-effective inspection and maintenance practices.

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