Exploring the Influence of Chikoko Clay on High-Performance Concrete: The Effects of Calcination Temperature and Admixture Concentration

Abstract

Chikoko clay, a locally available material in found in the Niger Delta region of Nigeria, has shown potential as a supplementary cementitious material in concrete production. This study investigates the impact of calcination temperature and admixture concentration on the properties of high-performance concrete incorporating Chikoko clay. Through a series of experimental analyses, the study aims to elucidate the role of Chikoko clay in enhancing the performance of concrete and optimizing its mechanical and durability properties. Results indicate that CPC content levels and production temperatures affect compressive strength (CS), with peak values observed between 10% and 15% CPC. CS exhibits a linear relationship with curing age and temperature, particularly notable at lower production temperatures, suggesting enhanced material strength. Comparative analysis with NS control specimens reveals significant enhancement with CPC admixture, particularly evident at 28 days. Concrete compositions containing 10% CPC and NS exhibit exceptional performance, with CS values approximately 108.65% higher than NS controls, confirming HPC classification. Chloride solution exposure shows distinct trends in concrete CS, with CPC incorporation mitigating CS losses, especially at 10% and 15% concentrations. These findings emphasize the significant influence of CPC content and production temperature on concrete CS and durability, offering valuable insights for optimizing formulations in various construction applications, particularly in aggressive environments.

Keywords — Supplementary cementitious material, High-performance concrete, Chikoko clay,

compressive strength