Glass is produced in many forms, including packaging of container glass (bottles, jars), flat glass (windows, windscreens), bulb glass (light globes), cathode ray tube glass (TV screens, monitors, etc), all of which have a limited life in the form they are produced and need to be reused/recycled in order to avoid environmental problems that would be created if they were to be stockpiled or sent to landfill. This paper deals with the recycling aspects of container glass, and the term "glass" hereafter refers to this type only. Post-consumer glass containers have traditionally been disposed of either in domestic refuse, which ends up in landfill, collected in designated collection spots for reuse/recycling, or collected from kerbside and then transported to collection sites. The major aim of environmental authorities is to reduce, as far as possible, the disposal of post-consumer glass in landfill and diversion to economically viable glass product streams. Glass is a unique inert material that could be recycled many times without changing its chemical properties. In other words, bottles can be crushed into cullet, then melted and made into new bottles without significant changes to the glass properties. Most of the glass produced is in the form of containers, and the bulk of what is collected post-consumer is again used for making containers. The efficiency of this process depends on the method of collecting and sorting glass of different colours. If different color glass (clear, green, amber) could be separated, then they could be used for manufacturing similar colour glass containers. However, when the glass colors get mixed, they become unsuitable for use as containers, and are then used for other purposes, or sent to landfill. The utilization of glass in concrete is of particular interest for the work reported here