• Abbas, Nadeem
• Hussain, Zahoor
• Akbar, Muhammad
• Ali, Azhar

Abstract

<title>Abstract</title><p>This research aims to develop a sustainable concrete matrix using recycled waste materials, including marble powder, recycled coarse aggregate, and crumb rubber from tire waste. The aim is to reduce CO₂ emissions associated with the cement and industrial materials waste, which currently contributes 8–10% to the global emissions. The study focuses on creating a concrete matrix with comparable properties to standard mixes. The mechanical properties and microstructural analysis of the newly designed concrete mix, such as compressive strength, split tensile strength, flexural strength and scanning electron microscopy (SEM) were evaluated. The results showed improvements in compressive strength by 5%, split tensile strength by 4%, and flexural strength by 5%. Besides, a statistical two-way analysis of variance (ANOVA) with a threshold of less than 0.001 was used, and the residual error was found to be low, both in terms of lack of fit and pure error. By incorporating crumb rubber, marble powder, and recycled coarse aggregate as cement ingredients, the mechanical properties of concrete and the environmental impact of industrial waste can be significantly improved. This research proposes a novel model to assess the sustainable performance of the newly developed concrete matrix. The findings demonstrate that a sustainable concrete matrix positively impacts sustainable performance. Incorporating marble powder, recycled coarse aggregate, and crumb rubber was beneficial in terms of mechanical strengths and microstructure. Overall, this research contributes to the goal of reducing CO₂ emissions in the cement industry and provides practical recommendations for incorporating sustainable materials in construction practices.</p>

Topics

• impedance spectroscopy
• microstructure
• scanning electron microscopy
• laser emission spectroscopy
• strength
• cement
• flexural strength
• tensile strength
• rubber