Design of an environmentally friendly concrete mix by partial replacement of fine aggregate with industrial waste glass in powdered form and cement with fly-ash

Abstract

In today’s developing countries the arising problem of industrial waste management and pollution created in the use of traditional construction materials is severe. High usage of cementitious materials and other traditional construction materials aids with a high risk of air and soil pollution along with diseases caused to workers. Also, daily increment of industrial wastes and its lowering scope of disposal and very average efficiency of disposal techniques are still lagging in helping reduce the problem. If industrial wastes like glass waste, fly ash, silica fumes, steel slag, etc. can be used in the construction industry as a replacement to traditional remedies both problems can be tackled. This research work pivots on the use and fly ash and glass powder effect as a replacement of traditional Portland slack cement by 25 % and fine aggregate by 10%, 20% and, 30% respectively, of total weight and design of a concrete mix. Making environment-friendly concrete blend at a lower cost by substituting conventional concrete accoutrements with waste materials is important. Now for perfecting basic concrete properties of this concrete mix with a low water-cement ratio and inclusion of superplasticizer in addition to mineral admixtures are needful. In this work Portland slack cement (PSC) is used, which is replaced at a percentage of 25 of the total weight of cement requirement by fly ash and of fine aggregate, in this case, we have used sand, replaced by waste glass powder with the percentage of 10, 20, and 30 of the total weight of fine aggregate. It is then tested and noted that the quantum of strength and plasticity needed is achieved at an optimum percentage. Furthermore, an analysis of the concrete mix is done for compressive strength after 7, 14, and 28 days of curing and checked for its strength in this report further. The compressive strength test data have shown that the values of compressive strength for different percentages of waste glass powder does not vary significantly with respect to each other. Also the Slump test data indicates that High Workability have been received for all the specimens of concrete with 10%, 20% and 30% of waste glass powder. Finally, a comparison of cost analysis was made between normal concrete and the newly developed concrete with fly ash and glass powder which also shows the viability of using the newly developed product for our daily use. The cost analysis results have shown that incorporating glass powder which is generally a waste material and fly-ash which is also an industrial waste does not increase the total cost of the concrete mix compared to normal concrete. Also depending upon the usage percentage of waste glass powder the cost of the total mix also varies which can be very useful for practical implementation.