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Wednesday, 21 August 2019
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Raw materials & technologies, Technologies

Recycled aggregate from construction waste and its use in concrete

Tuesday, 5 August 2014

The issues of sustainability are of prime concern these days as we use large amounts of natural resources for producing materials such as concrete.

The construction industry is looking for environmentally friendly materials
Source: Roman Milert - Fotolia.com

The construction industry is looking for environmentally friendly materials
Source: Roman Milert - Fotolia.com

Depletion of natural resources is a sustainability issue we need to address in an efficient manner. A recent trend in the construction industry is to use an alternative source of construction materials which can substitute the use of virgin materials in order to reduce the environmental impact in terms of energy consumption, pollution, waste disposal and global warming. On the other hand, waste generated from the demolition of old structure and construction activity is a matter of concern all over the world. Thus, recycling and reuse of these wastes may reduce the usage of natural resources and it can also serve towards the demands of the environment.

Identifying gaps in existing knowledge

The present paper gives a brief status of recycled aggregate concrete made out of recycled aggregate, summarises and critically analyses some of the most important research findings over the past few years regarding the material aspects. It also attempts to elucidate the approaches for better performances, identifies the gaps in existing knowledge and underlines the reasons why this promising technology has not become widely accepted by the construction industry. The practical problems with the application of recycled aggregate in concrete are also discussed.

The study is published in: Construction and Building Materials, Volume 68, 15 October 2014, Pages 501-516.

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