Use of recycled aggregates in rigid pavement

Abstract

With the rapid rate of global urbanization and industrialization, there is an intense development around the globe. This call for a non-ending need of resources (both natural and artificial) and leaves behind huge piles of wastes. In developing countries like in India, generally C&D waste is not properly disposed in an unorganized manner thereby leading the problem of environmental issues. However these days globally research work is done regarding recycling and for devising new applications to make more sustainable environment. Concrete is the premier construction material across the world and the most widely used in all types of civil engineering works. In the past, aggregates were readily available at lower prices and qualities to suit all purposes. However, in recent years the uncontrolled quarrying and use of aggregates from natural resources has led to the depletion of primary aggregates and has created greater awareness of environmental protection. This paper explores a theme on the use for recycled concrete aggregates and highlights its potential use as aggregate in rigid pavement construction along with various techniques and applications involved in the process. The effect of adhered mortar on the properties of aggregate particle along with various methods proposed by different studies in the past for their removal is discussed in the study. Also established rules or specifications for incorporating recycled concrete aggregates by different countries are discussed in study.