Closed cycle construction: an integrated process for the separation and reuse of C&D waste.

Closed cycle construction: an integrated process for the separation and reuse of C&D waste. Research Abstract Details 

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Closed cycle construction: an integrated process for the separation and reuse of C&D waste. Abstract Text:

Evert Mulder,Tako P R de Jong,Lourens Feenstra,

In The Netherlands, construction and demolition (C&D) waste is already to a large extent being reused, especially the stony fraction, which is crushed and reused as a road base material. In order to increase the percentage of reuse of the total C&D waste flow to even higher levels, a new concept has been developed. In this concept, called 'Closed Cycle Construction', the processed materials are being reused at a higher quality level and the quantity of waste that has to be disposed of is minimised. For concrete and masonry, the new concept implies that the material cycle will be completely closed, and the original constituents (clay bricks, gravel, sand, cement stone) are recovered in thermal processes. The mixed C&D waste streams are separated and decontaminated. For this purpose several dry separation techniques are being developed. The quality of the stony fraction is improved so much, that this fraction can be reused as an aggregate in concrete. The new concept has several benefits from a sustainability point of view, namely less energy consumption, less carbon dioxide emission, less waste production and less land use (for excavation and disposal sites). One of the most remarkable benefits of the new concept is that the thermal process steps are fuelled with the combustible fraction of the C&D waste itself. Economically the new process is more or less comparable with the current way of processing C&D waste. On the basis of the positive results of a feasibility study, currently a pilot and demonstration project is being carried out. The aim is to optimise the different process steps of the Closed Cycle Construction process on a laboratory scale, and then to verify them on a large scale. The results of the project are promising, so far.

Closed cycle construction: an integrated process for the separation and reuse of C&D waste. Publishing Authors By Initials

E Mulder,TP de Jong,L Feenstra,

For similar complex mixtures: waste products research abstracts see: complex mixtures: waste products research

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Closed cycle construction: an integrated process for the separation and reuse of C&D waste. Journal Published:

PUBLICATION TYPE: Journal Article

Journal: Waste management (New York, N.Y.)

VOLUME: 27

Page Numbers: 1408-15

Journal Abbreviation:

ISSN: 0956-053X

DAY: 29

MONTH: 05

YEAR: 2007

Closed cycle construction: an integrated process for the separation and reuse of C&D waste. Information

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LANGUAGE: eng

NlmUniqueID: 9884362

Closed cycle construction: an integrated process for the separation and reuse of C&D waste. Keywords Mesh Terms:

KEYWORDS: Waste Products

MESH TERMS: methods

Chemical & Substance for Abstract: Closed cycle construction: an integrated process for the separation and reuse of C&D waste. Information

Substance Name: Carbon Dioxide

Registry Number: 124-38-9

Grant and Affiliation Information for Closed cycle construction: an integrated process for the separation and reuse of C&D waste.

AFFILIATION: TNO Science and Industry, Department of Separation Technology, P.O. Box 342, 7300 AH Apeldoorn, The Netherlands. Evert.Mulder@tno.nl

Country: United States

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MEDLINETA: Waste Manag

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