Sustainable construction: composite use of tyres and ash in concrete.
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Date
2009Author
Snelson, DG
Kinuthia, JM
Davies, PA
Chang, SR
Type
ArticleLanguage
enMetadata
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An investigation was carried out to establish the physical, mechanical and chemical characteristics of a non-standard (unprocessed) pulverised fuel ash (PFA) and waste tyres from a former landfill site at the Power Station Hill near Church Village, South Wales, United Kingdom. Investigations are on-going to establish the suitability of the fly ash and/or tyres in road construction (embankment and pavement) and also in concrete to be used in the construction of the proposed highway. This paper reports on concrete-based construction where concrete blends (using various levels of PFA as partial replacement for Portland cement (PC), and shredded waste tyres (chips 15-20mm) as aggregate replacement) were subjected to unconfined compressive strength tests to establish performance, hence, optimising mix designs. Strength development up to 180 days for the concrete made with PC-PFA blends as binders (PC-PFA concrete), with and without aggregate replacement with tyre chips, is reported. The binary PC-PFA concrete does not have good early strength but tends to improve at longer curing periods. The low early strength observed means that PC-PFA concrete cannot be used for structures, hence, only as low to medium strength applications such as blinding, low-strength foundations, crash barriers, noise reduction barriers, cycle paths, footpaths and material for pipe bedding.
URI
http://www.ncbi.nlm.nih.gov/pubmed/18799299http://erepository.uonbi.ac.ke:8080/xmlui/handle/123456789/57753
Citation
Waste Manag. 2009 Jan;29(1):360-7. doi: 10.1016/j.wasman.2008.06.007. Epub 2008 Sep 16.Publisher
University of Nairobi School of Medicine
Collections
- Faculty of Health Sciences (FHS) [10387]