Experimental Evaluation of Waste Glass Powder as a Partial Replacement of Cement in Concrete

Cement manufacturing industry is one of the carbon-dioxide emitting sources besides deforestation and burning of fossil fuels. The global warming is caused by the emission of green-house gases, such as CO2, to the atmosphere. Among the greenhouse gases, CO2 contributes about 65% of global warming. The global cement industry contributes about 7% of greenhouse gas emission to the earth’s atmosphere. In order to address environmental effects associated with cement manufacturing, there is a need to develop alternative binders to make concrete. Consequently extensive research is ongoing into the use of cement replacements, using many waste materials and industrial by products. Efforts have been made in the concrete industry to use waste glass as partial replacement of coarse or fine aggregates and cement. In this study, finely powdered waste glasses will be used as a partial replacement of cement in concrete and compared it with conventional concrete. This work examines the possibility of using Glass powder as a partial replacement of cement for new concrete. Glass powder will be partially replaced as 5%,10%, 20%, 30% and 40% and tested for its compressive, Tensile and flexural strength up to 28 days of age and will be compared with those of conventional concrete. Glass powder will be used as cement replacement material up to particle size less than 75μm to prevent alkali silica reaction. For study of size effect of glass powder the powder is divided into two grades one is glass powder having size less than 75 micron and another is glass powder having particle size ranges from 75 micron to 150 micron.