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Environmental Impact Minimization and Performance Maximization in Concrete Recycling



Title: Environmental Impact Minimization and Performance Maximization in Concrete Recycling
Author(s): Takafumi NOGUCHI, Ryoma KITAGAKI
Paper category : conference
Book title: 2nd International Conference on Waste Engineering and Management - ICWEM 2010
Editor(s): J.Zh. Xiao, Y. Zhang, M.S. Cheung and Reuben P. K. Chu
Print-ISBN: 978-2-35158-102-5
e-ISBN: 978-2-35158-103-2
Publisher: RILEM Publications SARL
Publication year: 2010
Pages: 60 - 71
Total Pages: 12
Nb references: 11
Language: English


Abstract: The sheer amount of concrete in use and in stock compared with other building materials brings up the environmental issues such as the large amount of CO2 emitted when cement and concrete are produced and transported and the enormous amount of waste generated when concrete is disposed of. Besides, aggregate resources are beginning to be depleted at a high speed. Concrete has conventionally been regarded as being difficult to recycle. The construction industry has carried out research and development regarding the recycling of concrete since the 1970s in Japan. In these days recycling technology has been shifting from simple crushing into scrubbing with some preparations to produce high-quality recycled aggregate for structural concrete. The paper reviews the development history of recycling technologies in Japan from the viewpoint of the properties of recycled aggregate and recycled aggregate concrete as well as the environmental impact such as CO2 emission and waste generation in recycling. The paper also presents a new technology for enhancing the properties of low quality recycled aggregate for structural use, and is concluded with a proposal toward closed-loop resource recycling in concrete industry.


Online publication: 2011-01-25
Publication type : full_text
Public price (Euros): 0.00