International Research Journal of Education and Technology

The utilization of calcined clays and limestone powder as clinker substitutes to create a tertiary blend referred to as Limestone Calcined Clay Cement (LC3) is a promising developing technology. This study's innovation is the incorporation of supplemental cementitious material, namely coal ash, as an alternative at levels of 6%, 8%, and 10%. This cementitious substance can mitigate the environmental effects of the clinker component in cement. Typically, the replacement of clinker with limestone is limited to 15%, although calcined clay may replace up to 25% of the clinker. Researchers have successfully produced LC3 in the laboratory with a OPC content as low as 45%- 50%. Sustainability comprises the exact formulation of binder mixtures and the enhancement of binder efficacy. It is essential to assess the intrinsic characteristics of these binders to facilitate their application as standard industrial cement. The study seeks to find out the chemical and physical effects of LC3 binder components on hydration, hardening, and property development parameters to improve comprehension of the overall effectiveness of low- clinker binders. The findings indicate that determining the consistency limit is challenging due to the influence of lime content. The mortar cube strength with different coal ash percentages demonstrates that LC3 is similar to traditional Portland cement..

Key Words: Calcined clay, Clinker, Gypsum, Limestone, Coal ash, Consistency