Title : CONSTRUCTION AND DEMOLITION WASTE AS AN ALTERNATE FOR RIVER SAND IN CONCRETE
Authors : Revathi P, Pandurangan K
Publication : 8 - 10, October 2015
Volume : 1
Pages :
Price : 250
Abstract : The use of construction waste materials as aggregates for concrete production is highly attractive compared to the use of non-renewable natural resources, promoting environmental protection and allowing the development of a new raw material. Several countries have recommendations for the use of recycled coarse aggregate in structural concrete, whereas the use of the fine fraction is limited because it may produce significant changes in some properties of concrete. However, during the last decade the use of recycled fine aggregates (RFA) has achieved a great international interest, mainly because of economic implications related to the shortage of natural sands suitable for the production of concrete, besides to allow an integral use of this type of waste. In this study, the durable behaviour of structural concretes made with different percentage of RFA (0%, to 80%) is evaluated. Different properties related to the durability of concretes such as, water absorption and corrosion resistance potential are determined. In addition, the results of compressive, tensile and flexural strength are presented; the obtained results indicate that the recycled concretes have a suitable strength behavior. However, suitable admixtures are necessary to improve the performance of these concrete in aggressive environments.