MECHANICAL AND DURABILITY PERFORMANCE OF CONCRETE WITH PARTIAL CEMENT REPLACEMENT BY UNCALCINED LATERITE
Keywords:
Uncalcined concrete, Laterite, Mechanical Properties, Durability, Cement ReplacementAbstract
This study examines the mechanical and durability performance of concrete incorporating 10% uncalcined laterite as a partial replacement for Ordinary Portland Cement (OPC). A concrete mix with a 1:2:4 ratios and a water-cement ratio of 0.63 was prepared, and specimens were tested for compressive strength, flexural strength, and split tensile strength at curing ages of 7, 28, 56, and 90 days. Durability was assessed through water absorption and sulphate resistance tests. Results indicated that the laterite-modified concrete achieved 75–85% of the mechanical strength of the control mix, surpassing the minimum compressive strength requirement of 16 MPa at 28 days. Although an increase in water absorption and sulphate uptake was observed, the laterized concrete maintained continuous strength development over time. These findings suggest that 10% uncalcined laterite replacement is feasible for moderate-strength applications, promoting sustainable construction practices without significant compromise in mechanical integrity. Further optimization is recommended to enhance long-term durability under aggressive environmental conditions
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