EXPERIMENTAL STUDY ON PARTIAL REPLACEMENT OF FINE AGGREGATE WITH QUARRY DUST AND SAW DUST

The fine aggregate is one of the predominant contents of concrete usually natural river sand is using as the fine aggregate. Scarcity of good quality natural river sand due to depletion of resources and restriction due to environmental consideration, to make concrete manufacturing to look for suitable alternative fine aggregate.This project deals with experimental study on partial replacement of fine aggregate with quarry dust and saw dust. Quarry dust and saw dust which are the byproducts generated from stone crushers and wood processing work abundantly available all over the regions. Generally the availability of sand becomes a herculean task, especially in Kerala. In preparing concrete fine aggregate is partially replaced by quarry dust and saw dust. The present investigation has been undertaken to study the effect of quarry dust and saw dust, by adding quarry dust of 0%, 10%, 20%, 30% and 40%. And saw dust of 0%, 5%, 10%, 15% and 20% with the fine aggregate, a matured fine aggregate has prepared. The result comprise that the compressive and split tensile strength of adding 30% of quarry dust and 15% saw dust provide a maximum of compressive strength of 36.26N/mm2 for 28 days and split tensile strength of 3.8N/mm2 for 28 days. The fact found in the investigation is the saw dust can be added maximum up to 15% without affecting any of the physical or mechanical properties. An interesting and most significant point found is by increasing the percentage of saw dust, the cost of the whole concrete mixture can be reducedand the weight can be reduced up to 20%.