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<p>Ever-growing waste production and rising need for sustainable building materials have led to a growing interest in recycling concrete waste as a feasible alternative to natural counterparts. This study explores the recycling and valorization of concrete waste from the February 6th Kahramanmaraş earthquakes to promote a circular economy and sustainable reconstruction. Concrete debris from collapsed buildings was analyzed through extensive physical, chemical, and performance tests. Concrete waste displays high levels of SiO<sub>2</sub> and CaO, with water-soluble sulfate and chloride concentrations within regulatory limits. It fulfills requirements for coarse and fine aggregates regarding lightweight contaminators, confirmed by a methylene blue value of 0.275&#xa0;g/kg, and has flakiness and shape indices of FI<sub>15</sub> and SI<sub>15</sub>. The waste is categorized as LA<sub>35</sub> and MD<sub>DE35</sub> in Los Angeles and Micro-Deval tests, respectively, indicating adequacy for valorization in concrete. Its elongation is below 0.1% after 14&#xa0;days, affirming resistance to alkali-silica reaction. X-ray fluorescence results reveal that waste can be used in blended cement production with suggesting inclusion of minerals, with a total SO<sub>3</sub> content of 0.87%, total organic carbon of 0.29%, and clay content of 0.18&#xa0;g/100&#xa0;g—all below defined limits. RCAs are suitable for applications where high strength is not required, offering improved ion permeability and reduced water penetration depth by lowering the effective water/cement ratio.</p>

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Recycling-oriented characterization and valorization of concrete waste from the february 6th Kahramanmaraş earthquakes in sustainable built environment

  • 期刊论文

  • 发表日期：

    2025年7月1日

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  • Hüseyin İlcan

摘要

Ever-growing waste production and rising need for sustainable building materials have led to a growing interest in recycling concrete waste as a feasible alternative to natural counterparts. This study explores the recycling and valorization of concrete waste from the February 6th Kahramanmaraş earthquakes to promote a circular economy and sustainable reconstruction. Concrete debris from collapsed buildings was analyzed through extensive physical, chemical, and performance tests. Concrete waste displays high levels of SiO2 and CaO, with water-soluble sulfate and chloride concentrations within regulatory limits. It fulfills requirements for coarse and fine aggregates regarding lightweight contaminators, confirmed by a methylene blue value of 0.275 g/kg, and has flakiness and shape indices of FI15 and SI15. The waste is categorized as LA35 and MDDE35 in Los Angeles and Micro-Deval tests, respectively, indicating adequacy for valorization in concrete. Its elongation is below 0.1% after 14 days, affirming resistance to alkali-silica reaction. X-ray fluorescence results reveal that waste can be used in blended cement production with suggesting inclusion of minerals, with a total SO3 content of 0.87%, total organic carbon of 0.29%, and clay content of 0.18 g/100 g—all below defined limits. RCAs are suitable for applications where high strength is not required, offering improved ion permeability and reduced water penetration depth by lowering the effective water/cement ratio.