You have no items in your shopping cart.
ABSTRACT
Today, CO2 emissions and sulphate attacks are rampant in heavy industrial construction environment, the introduction of Limestone calcined clay cement into the construction industry will greatly negate the effect of such attacks on the environment. This paper aims at comparing the strength of the mortar of the limestone calcined clay cement to that of ordinary Portland cement with a means to reducing the amount of clinker in cement and finding a better workability than OPC cement This study entails the Calcination of clay from 7000 c to 8000 c, using a muffle furnace, which would reduce the hydroxyl group so as to increase the reactivity of the clay, the next stage involved casting the concrete using a mix with an admixture (Gypsum) into a 100x100x100mm mould. Sieve analysis was done and sand retained on sieve 600µM filter was used. After 24hrs the concrete was demoulded and was cured using dirty water. After curing for 3days,7days ,14days ,28 days respectively the cubes are crushed and the average compressive value was determined. The determined result at 14 days showed that there was a decrease in the strength of the concrete when compared to the control, the average compressive strength of OPC concrete was 29.980MPa and LC3 average compressive strength for okpella, ekpeshi and uzzeba at 800o C was 16.498MPa, 19.013MPa and 27.509MPa respectively. Limestone calcined clay in view of its low strength could be use as partial replacement of clinker in cement and cause the raw materials occur naturally, these helps to reduce the production cost of cement. The highest performing sample was uzebba 800o C at 14 days with compressive strength of 27.509MPa which was less than the control value 29.980Mpa at 14 days.
