Properties of concrete by partial replacement of cement by using sawdust and eggshell powder material Metakaolin.

Now a days Concrete is used as a construction material and it is available easy.it has some properties like strength, tensile, durability, etc. Sawdust and eggshell powder used as a natural material and it will reduce the cost of construction materials. Sawdust and eggshell powders are one mostly available waste materials on the earth, so we are using these waste materials as useful construction materials and we also improving the strength of concrete. Eggshell powder consist of high calcium percentage compared normal cement and sawdust is very low in weight but it has given the same strength like cement. We brought the eggshell powder and sawdust from my nearest area and we replaced cement weights with 5%, 10%and15%. We added 5% of eggshell powder and 5% of sawdust for 10% weight of cement, 10% of eggshell powder and 10%sawdust for 20% weight of cement, 15% of eggshell powder and 15% of sawdust for 30% weight of cement. The compression strength results by replacing 10% of cement has got 20.9N/mm2,by replacing 20%of cement as got 20.3N/mm2, by replacing 30% of cement as got 18.2N/mm2. We also done tensile strengths for cylindrical concretes and we got 3.2 N/mm2 by replacing 10% weight of cement and 3.5N/mm2 for 20% weight of cement and 2.4N/mm2 for 30% weight of cement. As per the reports 10% and 20% replacements given better strength compared to cement concrete. [ABSTRACT FROM AUTHOR]