Hydraulic lime – pozzolan concretes: Properties, uses and research needs

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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.
Original languageEnglish
Title of host publicationThe 9th International Concrete Conference 2016
Subtitle of host publicationEnvironment, Efficiency and Economic Challenges for Concrete
EditorsM Roderick Jones, Moray D Newlands, Judith E Halliday, Laszlo J Csetenyi, Li Zheng, Michael J McCarthy, Thomas D Dyer
Place of PublicationDundee
ISBN (Electronic)978-0-9573263-1-6
Publication statusPublished - Jul 2016


  • Hydraulic lime
  • Low-carbon concrete
  • Pozzolan


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