Abstracto

STUDY ON THE PROPERTIES OF HIGH STRENGTH CONCRETE USING GLASS POWDER AND LATHE SCRAP

T.Sezhiyan, R.Rajkumar

Glass is used in many forms in day-to-day life. It has limited life span and after use it is either stock piled or sent to landfills. Since glass is non-biodegradable, landfills do not provide an environment friendly solution. Hence, there is strong need to utilize waste glasses. Many efforts have been made to use waste glass in concrete industry as a replacement of coarse aggregate, fine aggregate and cement. Its performance as a coarse aggregate replacement has been found to be non-satisfactory because of strength regression and expansion due to alkali-silica reaction. The research shows that there is strength loss due to fine aggregate substitution also. The aim of the present work was to use glass powder as a replacement of cement to assess the pozzolanic activity of fine glass powder in concrete and Study the Properties of concrete. The present study shows that waste glass, if ground finer than 100μm shows a pozzolanic behavior. It reacts with lime at early stage of hydration forming extra CSH gel thereby forming denser cement matrix. The early consumption of alkalis by glass particles mitigate alkalisilica reaction hence increase durability of concrete. Lathe scarps are the waste materials which are collected from workshops and other steel industries at very minimum cost. They are similar to the steel fiber but they don’t have any regular shape and size. The dimension varies with nature of source that is depends upon the type of industries. Scraps considered in this work are 0.5mm thickness