The effect of the method of using waste carbonate cake on the compressive and tensile strength of green concrete

Articles in Press

Document Type : Original Article

Authors

• Zahra Heydari ¹
• Rasoul Shadnia ¹
• Davood Mostofinejad ²
• Shadzi Rezaei ¹

¹ Hakim Sabzevari University

² Isfahan University of technology

10.22067/jfcei.2024.88715.1307

Abstract

A large amount of waste from sugar factories is accumulated as waste. The purpose of this research is to recycle the waste of these factories, called carbonate cake (calcium carbonate mud, lime carbonate and lime sludge), which production is a serious problem for these factories and the environment, as a substitute for part of cement used in concrete. Due to the heterogeneous size of particles and for the greater similarity of the size of its grains with cement particles, carbonated cake with three methods: dissolved in water of mixing plan, sieved and ground, was used in different designs. Laboratory concrete samples were made with a water-cement ratio of 0.35 and with different percentages of replacing carbonate cake instead of cement equal to 5, 10, 20, 30 and 40, and finally, the compressive strength of 28- and 56-day samples and the tensile strength of 28-day samples was measured. It is possible to replace it up to at least 20% by weight of cement, without significantly reducing the compressive and tensile strengths in concrete; Quantitatively, the results indicate that the compressive strength of 28- and 56-day samples and tensile strength of 28-day samples with 20% waste powder instead of cement have decreased by 6.5, 10, and 5.4%, respectively, compared to the control samples without powder. It is worth noting that carbonate cake recycling causes reduction in industrial waste, waste transportation cost, waste disposal cost and removing inappropriate smell and organic materials. The use of this green concrete in construction industry is recommended.

Keywords

• Sugar factory waste
• recycling
• carbonate cake
• strength
• green concrete

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