Abstract
Concerns with the harmful environmental impact of Portland cement manufacture on a global scale, has prompted an extensive search for clinker replacement materials and alternative low CO2 cements. Amidst the development of radical new binder technologies there has been some resurgence in interest in Portland-cement’s predecessor – hydraulic lime. This paper describes recent collaborative research, conducted by multidisciplinary engineering consultancy Ramboll and researchers at the BRE Centre for
Innovative Construction Materials at the University of Bath, to develop modern, structuralgrade, hydraulic-lime concretes. The paper details work to identify the pozzolanic additions, and combinations thereof, which result in structural strength concrete; and the results of a suite of tests to assess the structural and durability properties of the most-promising hydraulic-lime pozzolan concretes. The environmental credentials of hydraulic-lime pozzolan concretes in comparison with Portland cement-based concretes is then considered. In relation to these results the paper discusses the ways in which hydraulic-lime pozzolan concretes can be used, including case studies for uses as varied as conservation of historic structures to engineered reinforced concrete construction. Finally, the paper discusses the future research that is needed to fully realise the potential of this new concrete.
Innovative Construction Materials at the University of Bath, to develop modern, structuralgrade, hydraulic-lime concretes. The paper details work to identify the pozzolanic additions, and combinations thereof, which result in structural strength concrete; and the results of a suite of tests to assess the structural and durability properties of the most-promising hydraulic-lime pozzolan concretes. The environmental credentials of hydraulic-lime pozzolan concretes in comparison with Portland cement-based concretes is then considered. In relation to these results the paper discusses the ways in which hydraulic-lime pozzolan concretes can be used, including case studies for uses as varied as conservation of historic structures to engineered reinforced concrete construction. Finally, the paper discusses the future research that is needed to fully realise the potential of this new concrete.
| Original language | English |
|---|---|
| Title of host publication | The 9th International Concrete Conference 2016 |
| Subtitle of host publication | Environment, Efficiency and Economic Challenges for Concrete |
| Editors | M Roderick Jones, Moray D Newlands, Judith E Halliday, Laszlo J Csetenyi, Li Zheng, Michael J McCarthy, Thomas D Dyer |
| Place of Publication | Dundee |
| Pages | 314-326 |
| ISBN (Electronic) | 978-0-9573263-1-6 |
| Publication status | Published - Jul 2016 |
Keywords
- Hydraulic lime
- Low-carbon concrete
- Pozzolan