DataVXInternational Journal of Concrete Structures and MaterialsPaper
journal article·2025-10-16Open access

Effects of Water-to-Binder Ratios on the Workability, Durability and Strength Development of In-Situ Carbonated Concrete

Melaku N. Seifu, Jemal Kedir Adem, Hammad R. Khalid, G. M. Kim, Solmoi Park

International Journal of Concrete Structures and Materials· Volume 19· Issue 1
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Abstract

Abstract Enhancing the performance and sustainability of concrete is critical in modern construction, and in-situ carbonation offers a promising approach by introducing CO2 directly during mixing. This study investigates the influence of CO2 dosage on the workability, durability, and strength of concrete with varying water-to-binder ratios. Gaseous CO2 was injected during mixing, leading to the immediate formation of amorphous calcium carbonate and a noticeable reduction in slump within 10 min. Experimental results showed that CO2 addition improved pore structure and chloride resistance, with reductions of up to 18% in total charge and 13% in migration coefficient. However, a decrease in 28-day compressive strength was observed, varying with mix design. These findings highlight the importance of carefully balancing CO2 dosage and water-to-binder ratio to enhance durability without compromising long-term strength.
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Research context

OpenAlex topics: Concrete and Cement Materials Research · Innovative concrete reinforcement materials · Concrete Properties and Behavior

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