Utilization of Waste Glass and Fly Ash as a Replacement of Material Concrete

Abstract

Waste glass creates serious environmental problems, mainly due to the inconsistency of waste glass streams. Increasing environmental pressure to reduce solid waste and to recycle as much as possible. The properties of concretes containing waste glass as fine aggregate were investigated in this study. The purpose of this research was to determine the influence and percentage optimum of glass waste as replacement of fine aggregate and fly ash as replacement of 20% of weight cement in flexural strength and sorptivity of concrete. This study used the experimental method to measure the results of treatment in research samples in the laboratory. The samples used 24 pieces blocks with dimensions of 150 mm x 150 mm with a length of 600 mm as flexural strength specimens and 24 pieces cylinders with a diameter of 100 mm with height of 50 mm as sorptivity specimens. The variation of glass powder starts from normal concrete 0%, 10%, 20%, 30% and 40%, each variation consists of 4 samples. The conclusions of this study are there is significant effect between glass powder variations as a replacement for part of fine aggregate and fly ash as a replacement for 20% of the weight of cement to the flexural strength and sorptivity of concrete. The optimum percentage 18.5% of glass powder with a flexural strength of 2.971 MPa and the percentage of the use of glass waste as a partial replacement for optimal fine aggregate which is in the variation of 20% glass powder with an initial sorptivity minimum value of 0.0076 mm/s1/2 and in the variation of 40% glass powder with a secondary sorptivity minimum value of 0.0034 mm/s1/2.