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Air pollutant-removing paving blocks produced with recycled waste materials



Title: Air pollutant-removing paving blocks produced with recycled waste materials
Author(s): C. S. Poon
Paper category : conference
Book title: RILEM International Symposium on Environment-Conscious Materials and Systems for Sustainable Development
Editor(s): N. Kashino and Y. Ohama
Print-ISBN: 2-912143-55-1
e-ISBN: 2912143640
Publisher: RILEM Publications SARL
Publication year: 2004
Pages: 187 - 194
Total Pages: 8
Nb references: 23
Language: English


Abstract: In Hong Kong, a huge quantity of construction and demolition (C&D) wastes is produced every day representing a large fraction of the solid waste stream. The disposal of the wastes has become a severe social and environmental problem in the territory. The Hong Kong Polytechnic University (PolyU) has successfully produced bricks and blocks using recycled construction wastes. The method can replace both the fine and coarse natural aggregates by recycled aggregates in making the paving blocks.This paper describes a further development of this technology designed to tackle the growing air pollution problems in Hong Kong. Laboratory studies at PolyU show that the combined use of recycled aggregates (RA), power plant furnace bottom ash (FBA), and with the addition of a small quantity of photocatalyst is able to produce air pollutant removing paving blocks. The block is able to remove low concentrations of air pollutants such as NOX via a photocatalytical reaction. Additionally, preliminary laboratory results show that replacing RA and FBA with recycled waste glass can improve the air pollutant removal ability of the blocks.


Online publication: 2004-11-24
Publication type : full_text
Public price (Euros): 0.00
doi: 10.1617/2912143640.022