ABSTRACT
In exploring the feasibility of calcined laterite as a supplementary cementing material in self-compacting concrete (SCC), in regards to how it impacts the concrete’s behaviour, performance and sustainability, a methodological approach was adopted for this study. In evaluating the influence of the incorporation on various SCC properties, the necessity of this research cannot be overstated. Positive findings would not only help reduce the cost of utilizing SCC practically, but would also minimizes the environmental impact associated with the extraction and use of traditional clinker. This would also aid the adoption of SCC in developing nations. The methodology involved collecting lateritic soil from Benin City and conducting index analysis on it. The soil was pulverized, sieved, and calcined to 600⁰c. Concrete mixes were formulated using Portland cement and calcined laterite, with laterite replacing cement at proportions of 0%, 5%, 10%, 12.5%, 15%, and 20%. The degree of selfcompaction was assessed using methods such as Slump Spread Flow, the L-box test, and T50cm, as per EFNARC standards. The compressive strength of the concrete cubes was measured on the 7th, 14th, and 28th days. The results found showed that replacement up to 10% of OPC by calcined laterite is viable in all regards, meeting all the workability requirements as stipulated by the EFNARC guidelines on Self-Compacting Concrete. There was also a 15% increment of strength of the concrete. Following the findings of this study, it has been determined that SCC mix designs could be better optimized incorporating calcined laterite. This would ensure higher structural integrity and a profound economic advantage. The results from this study work indicate the potential of environmentally friendly construction methods with SCC, particularly in the context of large-scale reinforced structures.
