CHAPTER ONE

       1.0    INTRODUCTION

1.1       Background of the Study

Waste glass constitute environmental problem, because it is considered as non-biodegradable material that pollutes the surrounding environment. The use of waste glass as a component in concrete gives waste glass a sustainable alternative to land filling and therefore makes it economically viable (Shaikh et al., 2013).

 Glass is a non-equilibrium, non-crystalline state of matter that appears solid on a short time scale but continuously relaxes towards the liquid state. Or glass is a non-equilibrium, non-crystalline condensed state of matter that exhibits a glass transition. The structure of glasses is similar to that of their parent supercooled liquids and they spontaneously relax toward the supercooled liquid state. Their ultimate fate, in the limit of infinite time, is to crystallize, (Edgar and John, 2017)

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