Effect of Activated Lime and Kaolin as Partial Replacement for Cement in Concrete Structure

Abstract

This research presents the effect of activated lime and activated kaolin as a cement replacement on the properties of concrete. A natural clay sample known as kaolin and lime was activated through thermal activation and used to partially replaced cement. %-¾ size aggregate was used in the casting of concrete cubes using 150mm x 150mm x 150mm for grades 20 and 25, and 150mm x 150mm x 150mm mould using a mix ratio of 1:2:4 for grade 20 and 1:1 ½: 3 for grade 25. The water-cement ratio adopted for the experiment was 0.55. A preliminary laboratory investigation was conducted include; sieve analysis, bulk density, specific gravity, aggregate impact value (AIV), aggregate crushing value (ACV), flakiness test, and elongation test. Also setting time of cement and standard consistency test was carried out. A Different replacement was cast and cured for 7, 14, and 28 days, and crushed. The compressive strength was gotten and conclusion a drawn.