The quality improvement of stony construction and demolition waste (CDW)

Abstract

Worldwide construction and demolition waste (CDW) is currently dumped. To close the building cycle and the building materials cycle by recycling CDW in high technical applications, the technical quality of stony materials must be improved. For this purpose, concrete rubbles and brick rubbles, the two major stony constituents of CDW, should be separated from each other. Based on the differences in density and content of Fe₂O₃ between the two materials, a wet method of jigging and a dry method of magnetic separation are effective, tested.

Keywords

CDW / concrete rubble / masonry rubble / upgradin / separation technique

References

[1] N L Weiss.SME Mineral Processing Handbook. Society of Mining Engineers, American Institute of Mining, Metallurgical and Petroleum Engineering Inc. New York 1985 ISBN 0895204336

[2] Perry R H, Green D W. Perry’s Chemical Engineers’ Handbook, 1998 7th ed Singapore: McGraw-Hill.

[3] H F Lund.Recycling Handbook. 2nd edition, McGraw-Hill, ISBN 0-07-039156-4, U. S. A, 2001

[4] Ministry of Housing, Spatial Planning and the Environment, Directorate of Waste Management Policy.Waste in the Netherlands, June 2001, VROM 14281/174

[5] Swana. Construction Waste and Demolition Debris Recycling Primer, 1993 Sliver Springs, MD: Solid Waste Association of North America.

[6] E K Lauritzen (Editor).Demolition and Reuse of Concrete and Masonry. In: Proceedings of the third international Rilem symposium. Odense, Denmark, 24–27 October, 1993

[7] G R Wolley, J J J M Goumans,et al (Editors). Waste Materials in Construction.Elsevier Science Ltd, 2000

[8] Task Group 3: Construction and Demolition Waste Management. Competitiveness of the Construction Industry. Working Group on Sustainable Construction, 28 September 2000

[9] Ch F Hendriks & G M T Janssen.Construction and Demolition Waste: General Process Aspects, HERON, 2001, 46(2)

[10] National Institute of Public Health and the Environment (RIVM).Dutch Environmental Data Compendium (in Dutch). ISBN 90 14 08309 2, The Netherlands, 2001

[11] Chen H J, Yen T, . Use of Building Rubbles as Recycled Aggregates. Cement and Concrete Research, 2003, 33(1): 125-132.

[12] J A R Lima.Aggregate Obtained from C&D Waste Recycling. In: Proposition of Specification for Use in Concrete. CIB Symposium on Construction & Environment, Nov 23rd & 24th, 2000, Sao Paulo, Brazil

[13] Xing W,et al. Upgrading the Quality of Construction and Demolition Waste-the Key to Recycle CDW at a High Technical Level. In: Proceeding of International Conference on Environmental Concerns and Emerging Abatement Technologies. China, 2001

[14] K Mesters. Density Separation of Recycling Building Materials by Means of Jig Technology.Aufbereitungs-technik. 1997 38(10)

[15] J McAndrew. Calibration of a Frantz Isodynamic Separator and Its Application to Mineral Separation. In:Proc. Australas. Inst. Min. Metall. No. 181:59–73, 1957