Speaker
Description
Reducing the clinker content in calcium aluminate cement (CAC) is crucial for improving environmental sustainability. This study investigates the partial replacement of CAC clinker with activated pumice to optimize setting time and mechanical strength. Experiments were conducted by gradually decreasing the clinker content and replacing it with varying proportions of activated pumice. The hydration kinetics, setting behavior, compressive strength, and microstructural evolution were analyzed.
Results show that, despite a significant reduction in clinker content, early and long-term strength values were maintained when using properly activated pumice. The reactivity of pumice influenced the formation of hydration products, particularly promoting the development of phases such as CAH₁₀ (calcium aluminate hydrate) and C₂ASH₈ (stratlingite). Additionally, the setting time was found to depend on the surface activity and chemical composition of the pumice.
This study demonstrates that clinker substitution in CAC-based systems is feasible, and mechanical performance can be preserved using activated pumice as a supplementary material. The findings provide a foundation for developing low-carbon cement formulations. Future research should explore the effects of different activators and curing conditions.
Affiliations
ÇİMSA ÇİMENTO SANAYİ VE TİCARET A.Ş, TOROSLAR MAH. TEKKE CAD. YENİTAŞKENT – AKDENİZ, Mersin, 33013, TÜRKIYE
| Keywords | Calcium aluminate cement (CAC) ,Activated chemicals, Clinker reduction, Low-carbon cement |
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