The effect of using rice husk ash and wood ash as partial replacements of cement in concrete blocks.

Abstract

With increasing agriculture, the large extent of agricultural by-products (wastes) is accumulated, leading to environmental pollution. So, this study focuses on the safe and economical reduction of these wastes. Wood Ash are the residue produced by the uncontrolled burning of wood for power generation and other purpose. On the other hand, Rice Husks are by products produced by Rice Milling Machines. The cement manufacturing industries will produce large amount of carbon dioxide to the environment, these cause greenhouse effect. The utilisation of Wood Ash and Rice Husk Ash as partial replacements of cement reduces the environmental and ecological problems. This paper intends to present the result of various experimental investigation leading with concrete incorporating Wood Ash and Rice Husk Ash replacing Ordinary Portland cement (43 grade) in concrete with various percentages. The fineness of wood ash is done by Sieves. The workability properties (slump test) and compressive strength, water absorption were determined and were compared with control M-25 mix.