Effect of Waste Glass Powder as a Supplementary Cementitious Material on the Concrete Mix Properties
Glass is a non-biodegradable material; therefore landfills do not provide an environment friendly solution for waste glass. Hence, there is a great need for proper management of waste glass. In this study, a new application of waste glass powder as a supplementary cementitious material to produce high performance concrete was investigated. Grinded glass was added to concrete mix as partial replacement of cement at (5, 10, 15) % by weight. It was evaluated as a pozzolanic material in conjunction with high range water reducing admixture superplasticizer (HRWR). The compressive strength at the ages of 7, 28, 90, 150, 240 days were tested. The study confirmed that the use of 10 % of grinding glass improved the compressive, flexure strength of concrete by about ( 30 , 11.64)%, respectively at 240 days compared to reference concrete and decrease the permeability of water under presser by about 29.4% at 240 days . At the end of 300 days of partial submerge in 3.5% NaCl solution, the half-cell potential of steel embedded in reference and glass concrete were (-356 and-340) mV respectively. The results indicated that there is a possibility to prepare high performance concrete using grinded glass.