Investigation on Mechanical Properties of Concrete by Partial Replacement with Silica Fume and Foundry Sand with Construction Demolition Waste

Abstract

New industries come in existence very rapidly. So, that demands of construction industry increase and waste material production also increases with increase of factories like foundry sand from metal factories, silica fume from silicon or alloy factories and construction demolition waste from old buildings destruction. These materials are used either for land filling or dispose in water which creates environmental issue or pollution. Demand of natural resources (fine and coarse aggregate) also increases due to the increase in demand of construction industry; high demand of natural resource also increases cost of construction. These waste materials are not used anywhere but it can be used again for construction purpose that will result in the economic building construction and reduce the environmental issue. In this paper the experimental work done on concrete with partial replacement of silica fume, construction demolition waste and waste foundry sand for using it in construction purpose and the conclusion comes out that when we replace the construction Demolition waste at 15% strength decrease from the normal concrete mix strength after that at 20% it increase from 15% concrete mix and at 25% its strength comes near the strength of normal concrete mix but workability decreases. So we can use this type of material for road construction. By 10% replacement of silica fume strength increase but after 10% it starts decreasing. By replacement of Waste Foundry Sand strength of concrete mix increase from the normal concrete mix up to 15% replacement of Waste Foundry Sand, increase the strength but after that it start decreasing. When we take the combination of the mixes then it comes out near the normal concrete mix strength. So, we can use these materials where we need low workability concrete like for road purpose.