The challenge of the cement industry towards the reduction of greenhouse emissions

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Title: The challenge of the cement industry towards the reduction of greenhouse emissions
Author(s): Collins, Frank; Sanjayan, Jay G.
Abstract: The production of one tonne of Portland cement requires 1.5 tonnes of raw material. The production of Portland cement is highly energy intensive, consuming 4 to 7 MJ of fossil fuel energy per kg, and releases approximately one tonne of carbon dioxide for manufacture of each tonne of Portland cement. The production of cement contributes 5% of the global greenhouse gas emissions.Utilisation of unused industrial by-products such as slag, which otherwise would contribute to land pollution, as Portland cement substitute in concrete, results in less energy for the manufacture of cement while also reducing the emissions arising from the burning of fossil fuels. The paper discusses the greenhouse gas emission reductions which can be achieved by the use of slag as a partial replacement of Portland cement (blended cements) and as a full replacement of Portland cement by the use of alkali activated slag concrete.
Publication type: Conference paper
Source: IABSE Symposium report: proceedings of 'Towards a Better Built Environment - Innovation, Sustainability, Information Technology', the International Association for Bridge and Structural Engineering (IABSE) Symposium, Melbourne, Australia, 08-13 September 2002, Vol. 86, pp. 1-11
Publication year: 2002
Keyword(s): Alkali activated slag concrete; Global warming; Greenhouse gas emissions; Portland cement; Slag blended cement
Publisher: International Association for Bridge and Structural Engineering
ISBN: 9783857481079, 3857481072
Publisher URL: http://dx.doi.org/10.2749/222137802796337152
Peer reviewed