Recycled aggregates in concrete production: Engineering properties and environmental impact

Mohammed Seddik Meddah*

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review

29 Citations (Scopus)


Recycled concrete aggregate is considered as the most abundant and used secondary aggregate in concrete production, other types of solid waste are also being used in concrete for specific purposes and to achieve some desired properties. Recycled aggregates and particularly, recycled concrete aggregate substantially affect the properties and mix design of concrete both at fresh and hardened states since it is known by high porosity due to the adhered layer of old mortar on the aggregate which results in a high water absorption of the recycled secondary aggregate. This leads to lower density and strength, and other durability related properties. The use of most recycled aggregate in concrete structures is still limited to low strength and non-structural applications due to important drop in strength and durability performances generated. Embedding recycled aggregates in concrete is now a current practice in many countries to enhance sustainability of concrete industry and reduce its environmental impacts. The present paper discusses the various possible recycled aggregates used in concrete production, their effect on both fresh and hardened properties as well as durability performances. The economic and environmental impacts of partially or fully substituting natural aggregates by secondary recycled aggregates are also discussed.

Original languageEnglish
Article number05021
JournalMATEC Web of Conferences
Publication statusPublished - Mar 9 2017
Event1st Sriwijaya International Conference on Engineering, Science and Technology, SICEST 2016 - Bangka Island, Indonesia
Duration: Nov 9 2016Nov 10 2016

ASJC Scopus subject areas

  • General Chemistry
  • General Materials Science
  • General Engineering


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