Utilization of Concrete Waste as a Cement Replacement: Influence of Calcination on Reactivity and Performance

Yıl 2025, Cilt: 8 Sayı: 5, 1645 - 1651, 15.09.2025

Hüseyin Ulugöl

https://doi.org/10.34248/bsengineering.1762537

Öz

Concrete waste is one of the major components of construction and demolition wastes, as well as a material that must be removed in an environmentally safe manner. With the inclusion of concrete waste as a minor additional constituent, the popularity of its utilization has gained importance. This study utilizes concrete waste with replacement ratios of 20%, 40%, and 60%, in both calcined and non-calcined forms. Two different calcination temperatures were applied to see the effect of calcination temperatures. Results show that as the replacement ratio of non-calcined concrete waste increases, mechanical performance decreases. However, calcination enhances the reactivity of concrete waste, and at an optimum replacement ratio of 20%, the compressive strength is higher than that of the reference specimen. After freeze-thaw cycles, specimens with 20% calcined concrete waste exhibit lower compressive strength losses compared to the reference specimen. Regarding the mass losses after freeze-thaw cycles, 20% concrete waste calcined at 950 °C have better performance than reference specimen. This study shows that with a 20% replacement ratio, calcined concrete waste can be used as a cement replacement material.

Anahtar Kelimeler

Concrete waste , Calcination , Freeze-thaw , Strength loss , Electrical resistance

Etik Beyan

Ethics committee approval was not required for this study because there was no study on animals or humans.

Kaynakça

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