Experimental Investigation on the Effect of Eggshell Powder as a Partial Replacement of Clay in Bricks

The study involves the utilization of eggshell powder (ESP) as an auxiliary addendum to lime in stabilization of an expensive soil with the objective of evaluating its potential in augmenting the performance of lime. Locally available soil was excavated and transported to the lab where it was characterized. The main composition of eggshell is calcium carbonate (CaCO2) while the main composition of earthenware aluminosilicate (Al2O2.2SiO2.2H2O ) and other oxide compounds calcium carbonate in eggshell can react to chemical substance in earthenware clay compound to form calcium aluminosilicate or anorthite and wollastonite or calcium silicate phase formation of the fired clay bricks .Adding 10% 14% and 20% weight eggshell powder into clay bricks and fired at 1000°C for 5 hours ,affects to the physical -mechanical thermal properties, i.e. high compressive strength and hardness ,good thermal expansion coefficient, good true density and low water absorption .In general, the theoretical compressive strength, hardness and water absorption of desired refractory are more than 7.0 MPA ,6.0HV ,and less than 25% weight respectively. Therefore, the obtained fired clay bricks added eggshell powder and fired at 1000°C for 5 hrs, are potential for use as bricks for construction and thermal insulation. Brick is one of the most common masonry units as a building material due to its properties.