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12 READY-MIXED CONCRETE London Claycrete The greater use of secondary aggregates reduces the demand for primary aggregates. London Concrete is currently producing Claycrete, which uses secondary aggregate to replace the coarse aggregate in the product - representing 55% of the total aggregate in the concrete. The recycled content in elements such as pile caps represents typical values of 70%. The concrete supplied with an addition of 40% PFA as a cement replacement provides an overall reduction in CO 2 emissions in the order of 70 kg/m 3 and still meets the required durability standards. SUSTAINABILITY CRITERIA Cornish secondary granite aggregate is supplied by Bardon Aggregates from St. Austell in Cornwall. The aggregate is derived from the waste stream from the production of Metakaolin/China Clay process. Once the Metakaolin has been extracted, the remaining hard material is not processed but discarded as waste. The material is now taken and crushed to meet the requirements for concrete aggregates. Call 020 8380 7300 or visit www.london-concrete.com for more information about London Claycrete Supplied by Supplied by Ash Solutions SUSTAINABILITY CRITERIA Sustainable solutions that won’t cost the earth Ash Solutions Ltd (ASL) was formed in 2004 and is based in Ulceby, North Lincolnshire. ASL became a subsidiary of Paragon Materials Ltd part of Aggregate Industries UK Ltd in June 2006. Ash Solutions Ltd is an alternative supplier of quality ash products in the UK. In particular, ASL supplies BSI quality assured EN450N specification material to the ready-mix concrete and concrete products markets. Ash is a by-product of coal fired power station generation and is used in cementitious products as a replacement and/or filler. Ash Solutions Ltd takes a by-product from the electricity generating sector for supply to the concrete industries thereby reducing the clinker factor (cement) in concrete production as well as diverting materials from landfill. Using Ash as a cement replacement or filler results in significant CO 2 savings. Call 01634 890744 or visit www.paragon-materials.com for more information about Ash Solutions 13
14 Sustainable solutions that won’t cost the earth 15 STRUCTURAL WALLING Masterblock Enviroblock Enviroblocks are sustainable aggregate building blocks certified by the BRE with an A rated environmental profile. The product range consists of 100mm widths in Dense 7N Solid and Lightweight Aggregate 3.5N Solid and the range is being expanded to include special paint finish and high strength variants. SUSTAINABILITY CRITERIA Contains 100% recycled aggregate or 100% China Clay secondary aggregate. Case Study Housing Corporation and Housing Association, Masterblock Enviroblock The specification for this project required an external leaf to timber frame houses to be ‘aerated’ or certified through the ‘BRE Environmental profile scheme’. After some discussion with project consultants the architects, JJ Jones and Sons, decided that producers of ‘aerated’ blocks were located many miles from Cornwall and therefore the delivery of blocks would offset any environmental gain in using their product. ‘Enviroblock’ were the only product that could respond to all aspects of the brief including having a local outlet. Feedback from those who worked on site was very positive as the blocks are the same size and similar to use to traditional concrete blocks, so therefore eliminating any confusion with new building methods. The architects were very pleased with the finished project and would not hesitate to use ‘Enviroblock’ again. The product allowed the Housing Corporation and Housing Association to achieve a pass with the Ecohomes Environmental Assessment Scheme. Call 01285 646800 or visit www.masterblock.co.uk for more information about Masterblock Enviroblock Supplied by Supplied by Fyfestone Enviromasonry Enviromasonry is a sustainable architectural masonry which has been certified by the Building Research Establishment (BRE) with an A rated environmental profile. Enviromasonry is available in six colours and four finishes, Fairfaced/Split and Textured/Polished in sizes 440x215x100mm for the solid and 440x215x140mm for the cellular range. Enviromasonry provides a complete range of sustainable products to help the specifier to achieve the highest rating in sustainable construction. SUSTAINABILITY CRITERIA Contains china clay stent and GGBS cement replacement minimising OPC. Case Study Clubhouse, Deeside Golf Club, Aberdeen, Fyfestone Enviromasonry The architect’s brief was to use an attractive masonry wall unit which met the aesthetic, structural and environmental needs of this type of application. Environmasonry was an external cavity wall solution which achieves an ‘A’ rating in the Building Research Establishment’s “Green Guide to Specification”. The resulting building proves that exceptional aesthetic appearance and excellent environmental credentials can and do go hand in hand. Call 01285 646900 or visit www.fyfestone.com for more information about Fyfestone Enviromasonry
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