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The Concrete Times April 2015

The CONCRETE Times • APR 2015 3 The CONCRETE Times EDITOR Steven Callaghan Tel: 020 3086 9296 Ext 4 steven@marwoodevents.com ADVERTISEMENT MANAGER Anthony Kane Tel: 020 3086 9296 Ext 9 anthony@marwoodevents.com SUBSCRIPTIONS MANAGER Marianne Callaghan Tel: 020 3086 9296 Ext 1 marianne@marwoodevents.com The CONCRETE TIMES is published digitally 11 times a year with 1 special print version distributed only at The UK CONCRETE Show at the NEC, Birmingham, each February . IMPORTANT DISCLAIMER The responsibility for the content provided in the articles published in The Concrete Times and the opinions expressed are exclusively those of the author(s) concerned. Neither the publisher, Marwood Events Ltd, nor the Editor, is responsible for errors in the contents or any consequences arising from the use of information contained in it. ©Marwood Events 2015 FROM THE EDITOR The future is bright for concrete as new technologies point the way forward Yet another new style binder is announced to the market but this new eco-cement has the resources of Lafarge behind it’s launch. Some months back I wrote about the launch of a new cement free concrete and questioned how likely it was to be adopted to given the structural nature of concre and the conservative approach understandably taken in the specifying of by engineers, at least in the first world. The story on the cover of this month’s issue moves this issue forward in two important ways. The first is cement is not being replaced but rather being cured in a different way and, secondly, this new product will be promoted with the brand and resources of Lafarge behind it. This means that Lafarge themselves will be manufacturing and delivering concrete mixes incorporating the new cements and, to my mind crucially, the fact that the mix still contains cement, albeit a modified version, will reassure many specifiers and engineers. There is, of course, some irony in this state of affairs - it is, after all, the propensity of standard hydraulic cements to shrink when drying (curing) that makes concrete weaker than the sum of it’s parts - take cement out of concrete and replace it a binder that does not shrink and you have a material with a massively increased compressive and, crucially, tensile strength. Imagine the implications of a concrete that can reduce carbon emissions by up to 70%, needs far less and in some cases, no reinforcing steel? A concrete that can be laid in thinner section to achieve the equivalent strengths whilst allowing forms to be stripped in a matter of a few hours as it requires only 24 hours rather than 28 days to achieve the majority of it’s strength and you have what really will be, in effect, a revolutionary new material. This new concrete will open a whole range of applications for which traditional concrete struggles for a number of possible reasons, e.g. weight, minimum required thickness of section. Less material means faster placing and potential cost savings in material, labour costs, pump hire hours reduced and many more. The future of concrete is bright indeed! Steven Callaghan, Editor Tel: 020 3086 9296 Ext 4 steven@marwoodevents.com


The Concrete Times April 2015
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