Partial Replacement of Cement with Marble Dust Powder
In this project we have made fly ash cement bricks with variations in its percentage of composition. The project describes the use of local fly ash in construction industry in a way to minimize the industrial waste. The aim of this project is to find that percentage of composition by weight of fly ash cement brick which will provide it better strength without much increase in the percentage of cement. We have made five types of fly ash cement bricks. In three types sand percentage is taken as 30% while percentages of fly ash and cement have being changed by 5% And in others percentage of fly ash is taken 60% with sand and cement having variation in their percentage by weight of the brick. The fly ash used is taken from the NTPC, sipat (C.G. Using fly ash gives technical and economical advantage. As Fly ash is pozzolanic in nature, it increases the strength of the brick and it is a waste material of thermal power plant so using it in making the brick reduces the cost of the brick. Sand used has larger size particles compare to fly ash, it reduce the shrinkage of brick, providing volume stability. Cement is used as the binding material to bind the sand and fly ash together. In the compressive strength test performed, the strength of TYPE3 (55% fly ash, 30% sand and 15% cement) brick was 4.405 N/mm 2 which was the highest, followed by TYPE5 (60% fly ash, 25% sand and 15% cement) brick with strength 3.926 N/mm 2 In this project all the types of brick have got percentage water absorption less than 15% which is acceptable as per IS:3495.