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Concrete-2020-April-Fibres.Pdf THE MAGAZINE OF THE CONCRETE SOCIETY Volume 54 April 2020 Issue 03 concreteVisit: www.concrete.org.uk Core matters Assessment of in-situ concrete strength Frame construction Preventing the risk of shear failure Fibres Ultrasonic pulse technology coversConcreteApril20.indd 2 24/03/2020 15:26 Vertua~ Low carbon by design 1;: "[!] .,. .Uc GmG>< CEMEX.CO.UKNERTUA II-;' . [!] r• coversConcreteApril20.indd 3 24/03/2020 15:26 Photo of the month The wet docks at Bassins à Flot are a key aspect of the harbour city of Bordeaux. As part of the redevelopment of this district in the north of the city, the wet docks have become a major area of public space. One of the regeneration projects has recently been completed after 18 months’ work – the construction of the G7 and G8 mixed-use buildings carried out by Eiffage Construction Sud-Ouest. The 4300m² G8 plot, designed by Martin Duplantier Architects, is set between the last piece of boulevard and the docks; it houses a business school as well as retail. Its striking aspects are the four as-struck concrete façades. Largely open along its ground floor, the building recalls the industrial past of the site, all the while conferring an abstract, timeless aesthetic. Two large patios on the first floor, covered with concrete pergolas (shown above), create spaces that favour interaction between visitors. (Photo: Schnepp Renou.) 1-14ConcreteApril2020.indd 1 26/03/2020 09:50 Contents 1 Photo of the Month 5 From the Editor 6 World News 10 Obituary 12 Society News 14 Book Review Frame Construction 16 Preventing the risk of punching shear Mike Revans 20 Clayton Hotel, Charlemont, Dublin Neil Flanagan 25 Concrete frame is at the heart of luxurious city centre development Erol Erturan 28 It never rains but it pours: statutory adjudication and the supply of concrete Kieran Fano Fibres 30 Time to call in reinforcements Andy Taurah 32 Fibres in ultra-high-performance concrete Peter Buitelaar and Stephan Müller 35 Ultrasonic pulse technology Warren Thomas 38 Hybrid reinforcement is gaining in popularity Ben Vanheuverzwijn Standards 40 Assessment of in-situ concrete strength – revised BS EN 13791 and BS EN 12504-1 Neil Crook Construction Chemicals 46 Crystalline admixtures – more support and research needed Ben Hickman 48 Protection of urban spaces – sustainable mineralisation of concrete and other construction substrates Chris Sugden and Olivier Debas Roads Railways Tunnels 51 Linear drainage on M6 smart motorway scheme Jeanette Edwards Concrete On-Site 54 On-site concrete solution to London piling project Chris Smith 56 Features List/Ad Index/Subscriptions 2 APRIL 2020 concrete www.concrete.org.uk 1-14ConcreteApril2020.indd 2 26/03/2020 09:50 William Mitchell (1925–2020)10 Fibres in UHP concrete 32 Crystalline admixtures 46 concrete magazine is produced in-house by The Concrete Society, a not-for- profit, independent membership organisation dedicated to supporting the use of concrete, the most widely used building material in the world. Established in 1966, and with members from around the world, The Society has built on its technical base to become a leading provider of information, serving the needs of clients, architects, engineers, specifiers, suppliers, contractors and users of concrete. Visit: www.concrete.org.uk The April 2020 cover In January, BSI published a revised BS EN 13791 Assessment of compressive strength in structures and precast concrete component. This uses the revised BS EN 12504-1 Testing concrete in structures. Part 1 – Cored specimens – taking, examining and testing in compression. What are the changes? See page 40. (Photo: Socotec.) Follow concrete on Pinterest Cover Story Go to pinterest.com/concretemag/boards, click on a board to view images from projects featured in current and past issues. Share images with others within the concrete community. Follow: @ukConcrete Find us on: 40 www.concrete.org.uk APRIL 2020 concrete 3 1-14ConcreteApril2020.indd 3 26/03/2020 11:25 THE CONCRETE SOCIETY is an independent membership organisation dedicated to supporting the use of concrete – the most widely used building material in the world. Established in 1966, The Society encourages innovation and the exchange of knowledge and experience across all disciplines. The Society works through the co-operation of our members, who come from all sectors of the industry to exchange information and experience, and to enhance the performance, productivity and quality of concrete as a construction medium. Supported by the technical and administrative staff of The Society, our members collaborate to produce and disseminate state-of-the-art reports, recommendations and practical guidance. The Society receives special support from the following: SPECIAL CATEGORY MEMBERS www.breedongroup.com www.laingorourke.com www.tarmac.com www.cemex.co.uk www.sir-robert-mcalpine.com www.hanson.co.uk The Society is supported by a global community of 250+ Corporate and 500 individual members. www.concrete.org.uk 1-14ConcreteApril2020.indd 4 26/03/2020 09:50 FROM THE EDITOR EDITOR: James Luckey Tel: +44 (0)1276 607158 [email protected] EDITORIAL ASSISTANT: Helen Marney Tel: +44 (0)1276 607159 [email protected] TECHNICAL ADVISOR: Richard Barnes Ploughing on DESIGN: Darryl Killoran Strange times. One minute, industry matters are looking promising; the next SALES REPRESENTATIVE: minute, life – and indeed the world – is put on hold. There’s no precedent in Fred Combe modern times for the sheer disruption and stranglehold that coronavirus has Tel: +44 (0)20 3859 7097 placed on ordinary activities. But perhaps rather than wallow in a present situation [email protected] beyond much control, we should keep that upper lip stiff and focus on more James Pembroke Media Ltd is optimistic issues. The Concrete Society’s appointed advertising sales agency. herever you are reading this profile and boost their marketing/PR SUBSCRIPTIONS MANAGER: Val Goddard copy of Concrete, here’s hoping outreach. you are safe and well, and that If it’s bespoke technical information Tel: +44 (0)1276 607149 [email protected] W the pages inside can provide you are after, then The Society’s renowned an informative distraction (especially if you’re advisory service is still on hand to answer concrete is published 10 times a year (2020) working from home) from current affairs. queries. Our library team is also here to field and sent free to all Concrete Society members. Annual prepaid subscriptions for 2020: If you’re away from the office for day- research enquiries and those looking for UK £125, Europe £150, outside Europe £170 to-day work now, remember that Concrete general information. (prices inc. p&p). Single copies and back Society members have access to a wealth So despite the present difficulties issues: £15 (exc. p&p). of information via our website and the providing a reality check and maybe a Members’ Area in particular. So much of change in perspective and priorities, with THE CONCRETE SOCIETY our material is available at your fingertips the hyperconnectivity of the modern world President: (including, coincidentally, ‘@ Your Fingertips’, people can adapt to new circumstances. Deiniol Williams the nuggets of free information), from advice Clearly, we all look to future days Managing Director: sheets and ‘Concrete on site’ booklets, to the (whenever they are) when life can return Kathy Calverley MBE Concrete Vault and magazine archive. to ‘normal’. But to focus on the positives, Although a number of the Regional circumstances have reset the nation’s focus on The Concrete Society, Riverside House, 4, Meadows Business Park, Network events over the coming weeks have where its true priorities lie, in looking out for Station Approach, Blackwater, faced uncertainty, a visit to the Events page each other, and we have a Government that Camberley, Surrey GU17 9AB, UK on-line will keep you updated as to the latest seems willing to throw money, everything and Tel: +44 (0)1276 607140 news. the ‘kitchen sink’ at the current situation. Fax: +44 (0)1276 607141 e-mail: [email protected] One event that ploughs on is the 2020 In reading our news section this month, www.concrete.org.uk Concrete Society Awards. The deadline maybe reflect that life was indeed ‘normal’; for entries is fast approaching (22 April) we’ve kept it focused on pre-virus updates. Printed by Bishops Printers and the competition is open to structures Stay well and wash your hands (again). Portsmouth, Hampshire substantially completed between October Enjoy the issue! © The Concrete Society, 2020 2018 and April 2020. As in recent years, ISSN 0010-5317 there are no formal categories; we are looking for projects with concrete as the majority Neither Concrete nor The Concrete Society are structural component. responsible for the statements made or the opinions expressed in this journal by third parties and If your company has been involved with organisations. such a project that has a certain je ne sais quoi, then entry to the awards is highly James Luckey, Editor recommended. Success at the awards has Tel: 01276 607158 helped innumerable companies raise their [email protected] www.concrete.org.uk APRIL 2020 concrete 5 1-14ConcreteApril2020.indd 5 26/03/2020 09:50 WORLD NEWS NEWS IN BRIEF Bendable concrete Construction contract made from waste USA • Nuclear Power Workers at Georgia Power’s Vogtle A NEW type of concrete that is made plant have completed the final from waste materials that can bend awards increased under load has been developed and concrete placement inside the Unit 3 containment vessel, which houses the ACCORDING to the latest edition of contract award was the £2bn Dogger patented by Swinburne University of unit’s reactor. Georgia Power is leading the Economic & Construction Market Bank Creyke Beck 1.4GW offshore Technology researchers Dr Behzad work on the US$25 billion (£21bn) Review from industry analyst Barbour windfarm.
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