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<p>In order to develop sustainable construction methods, it is necessary to incorporate waste materials into the concrete production process. This study evaluates the mechanical, permeability, and microstructural performance of green concrete incorporating waste glass powder (WGP) as a partial cement replacement under elevated temperature conditions. Concrete mixes with 0%, 10%, and 15% WGP were tested for compressive strength, flexural strength, elastic modulus, porosity, sorptivity, and microstructure. Results showed that incorporating 15% WGP increased compressive strength by up to 54% at ambient temperature and retained about 55% of its strength at 600&#xa0;°C, compared to 40% for the control mix. Porosity and sorptivity were reduced by approximately 20–25%, indicating improved impermeability. The Si/Ca ratio increased by up to 38% as a result of improved pozzolanic reactivity and denser C-S–H formation, which were verified by SEM test. The results demonstrated that WGP not only reduces cement use but also improves durability and thermal resistance. This supports its application in structural concretes that are eco-efficient and fire-resistant. The findings demonstrate WGP’s potential for widespread use in sustainable infrastructure, which might lower CO<sub>2</sub> emissions and increase recycling of waste in the building sector.</p>

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Effect of Elevated Temperatures on the Mechanical and Durability Properties of Green Concrete with Waste Glass Powder

  • 期刊论文

  • 发表日期：

    2025年12月2日

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  • Sheelan Mahmoud Hama,
  • Amer Salman Jamel,
  • Taher A. Tawfik

摘要

In order to develop sustainable construction methods, it is necessary to incorporate waste materials into the concrete production process. This study evaluates the mechanical, permeability, and microstructural performance of green concrete incorporating waste glass powder (WGP) as a partial cement replacement under elevated temperature conditions. Concrete mixes with 0%, 10%, and 15% WGP were tested for compressive strength, flexural strength, elastic modulus, porosity, sorptivity, and microstructure. Results showed that incorporating 15% WGP increased compressive strength by up to 54% at ambient temperature and retained about 55% of its strength at 600 °C, compared to 40% for the control mix. Porosity and sorptivity were reduced by approximately 20–25%, indicating improved impermeability. The Si/Ca ratio increased by up to 38% as a result of improved pozzolanic reactivity and denser C-S–H formation, which were verified by SEM test. The results demonstrated that WGP not only reduces cement use but also improves durability and thermal resistance. This supports its application in structural concretes that are eco-efficient and fire-resistant. The findings demonstrate WGP’s potential for widespread use in sustainable infrastructure, which might lower CO2 emissions and increase recycling of waste in the building sector.