Cement Energy Environment

68 ROLE OF MANUFACTURED SAND IN SUSTAINABILITY ISSUES - I The usage of river sand is now being confronted by the artificial end products of stone quarries or construction & demolition wastes. This unique industrial product is named as Artificial sand or Manufactured sand and is superior to our natural river sand as this paper suggests. Not only in physical characterizations they can substitute river sand in cementitious systems like mortar and concrete. Also, common river sand is expensive due their ban by the government but manufactured Abstract sand can alleviate the costing issues and can be an economical alternative to natural sand. The problems of waste management can be solved through the use of tail end manufactured sand products in concrete. Durability parameters of manufactured sand are more favorable than natural sand and the former can be used to make durable and sustainable concrete in the long run. Indian standards like IS:383 encourage the use of manufactured sand through latest revisions. By Professor Mainak Ghosal, Joint Secretary, Coal Ash Institute of India & Governing Council Member Indian Association for Structural Engineers Keywords: Concrete, Manufactured, Products, Sand Sand is an integral part of concrete systems. It constitutes about 30% of the concrete matrix and acts mainly as an inert filler for concrete. Though it has minimum or no role to play in cement hydration process, it mainly transfers the dead/live load of the whole structure to the aggregate part of the cementitious mix. From engineering point of view, sand is also termed or Introduction known as Fine Aggregates and can be classified based on the following types 1. Types of Sand Based on Source 2. Classification based on Sieve analysis. 3. Classification based on purpose of use 4. Classification based on grain size.