THE MAGAZINE OF THE CONCRETE SOCIETY Volume 54 October 2020 Issue 08 concreteVisit: www.concrete.org.uk Dust to dust Consigning poor H&S to history Car parks Corrosion testing Research/development 3D-printable AACCs COVERS OctoberCONCRETE2020.indd 2 29/09/2020 11:49:54 STILL USING DRILLED CONNECTIONS? 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Contact us today to learn more, or visit our website at www.jp-uk.com J&P Building Systems Limited 01844 215 200 Thame Forty, Jane Morbey Road, www.jp-uk.com Thame, Oxfordshire OX9 3RR [email protected] J&P Building Systems Ltd. is a subsidiary of: ■ H-BAU Technik GmbH ■ JORDAHL GmbH COVERS OctoberCONCRETE2020.indd 3 29/09/2020 11:49:55 Contents 3 From the Editor 4 World News 6 Letter to the Editor/Obituary Slipform Construction 8 Straight to the top Eric Vere Car Parks 12 Green Street multi-storey car park, Jersey Martyn Lewis 16 Car park corrosion testing Warren Thomas 19 Concrete companies come together for charity project Concrete report Sawing and Drilling 21 Consigning poor health and safety to dust Walid Hussain Research and Development 24 3D-printable cementitious composites Seyed Hamidreza Ghaffar and Mehdi Chougn 28 Towards a low-carbon future Mike McCarthy, Moray Newlands and Rod Jones Durability/Aggressive Environments 30 Silica fume concrete – high-performance concrete perfect for hostile environments Lee Baldwin 32 Multi-faceted approach to ensure the durability of concrete in aggressive environments Kai Yang, Susan Bernal and Muhammed Basheer Formwork and Falsework 36 BIM and temporary works Billy McCormick and Paul McLaughlin 38 On the move in one of London Underground’s busiest stations Concrete report 40 Features List/Ad Index/Subscriptions concrete magazine is produced in-house by The Concrete Society, The October 2020 cover a not-for-profit, independent membership organisation dedicated to Dust is one of the biggest supporting the use of concrete, the most widely used building material in health and safety concerns the the world. construction industry is facing. It poses a significant risk to Established in 1966, and with members from around operatives wellbeing and employers’ the world, The Society has built on its technical base operations. However, there is still to become a leading provider of information, serving a lack of understanding around the needs of clients, architects, engineers, specifiers, these detrimental impacts, and the suppliers, contractors and users of concrete. solutions that exist to address the associated problems. Visit: www.concrete.org.uk See page 21 (Photo: Hilti.) Follow concrete on Pinterest Go to pinterest.com/concretemag/boards, click on a board to view images from projects featured in current and past issues. Share images with Follow: @ukConcrete Find us on: others within the concrete community. 1-7OctoberCONCRETE2020.indd 1 29/09/2020 11:50:18 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 1-7OctoberCONCRETE2020.indd 2 29/09/2020 11:50:19 FROM THE EDITOR EDITOR: James Luckey Tel: +44 (0)1276 607158 [email protected] EDITORIAL ASSISTANT: Helen Marney No room for Tel: +44 (0)1276 607159 [email protected] TECHNICAL ADVISOR: Richard Day complacency DESIGN: Darryl Killoran To err is human – we all make mistakes. Both at home and in the workplace errors creep in. The trick is to learn from them and move on. SALES REPRESENTATIVE: Vicky Ashby Tel: +44 (0)20 3859 7097 [email protected] s any amateur DIYer knows, was described only as “engineering issues”, the best old adage to follow is to although news outlets were reporting errors James Pembroke Media Ltd is The Concrete Society’s appointed measure twice and cut once (then with reinforcement. advertising sales agency. A use the sander to make it fit). As In a similar vein, in Sheffield the concrete a nation with a passion for DIY, we regularly frame of a new university building faced SUBSCRIPTIONS MANAGER: put up shelves with a noticeable gradient, being pulled down after reportedly suffering Val Goddard splash paint over untouched skirting board from structural problems due to piling. Tel: +44 (0)1276 607149 and produce cupboards with doors that drop [email protected] six inches when opened. Semi-skilled but Costly mistakes concrete is published 10 times a year (2020) enthusiastic, our errors only matter at home. These two examples will be very costly and sent free to all Concrete Society members. Errors in the workplace though are rather mistakes to rectify and should also serve as a Annual prepaid subscriptions for 2020: more serious. And in construction the reminder that complacency has no place on UK £125, Europe £150, outside Europe £170 (prices inc. p&p). Single copies and back outcome can be catastrophic; from millions of the construction site or in design offices. issues: £15 (exc. p&p). pounds of damage to a worst-case scenario of Think about every different party involved fatalities. One only needs look at the annual in planning, designing, specifying and THE CONCRETE SOCIETY figures from the Health and Safety Executive constructing a project and its various phases. President: to see the effect that errors of judgement, Think about all the building regulations Deiniol Williams application or knowledge can have on lives. being followed, all the Standards invoked and Recent collapses of bridges in America and all the guidance adhered. And yet still, in the Managing Director: Europe, with resulting loss of life, further two examples shown, errors were made or Kathy Calverley mbe highlight the seriousness of human error. calculations mistaken. The Concrete Society, Of course, this is why so many rules, It’s always easy to believe, ‘it won’t happen Riverside House, 4, Meadows Business Park, regulations, legislation, Standards, best to my project’, or ‘these things rarely happen’. Station Approach, Blackwater, Camberley, Surrey GU17 9AB, UK practice guidance etc are devised to mitigate But the fact remains that they do occur. And Tel: +44 (0)1276 607140 such errors. so all the seemingly endless time checking Fax: +44 (0)1276 607141 And yet despite all these efforts, mistakes and double-checking designs or calculations, e-mail: [email protected] happen. Thankfully, major errors are very few regulations and rules, or updating or www.concrete.org.uk and far between. Which is why when they do refreshing skill sets etc is never time wasted. Printed by Bishops Printers come to light they are all the more surprising. Enjoy the issue! Portsmouth, Hampshire So the reporting of two stories over the © The Concrete Society, 2020 summer concerning major issues with ISSN 0010-5317 concrete-frame buildings should make everyone in industry sit up and take notice. Neither Concrete nor The Concrete Society are In Manchester, a new development responsible for the statements made or the opinions of high-rise flats made the news, when expressed in this journal by third parties and James Luckey, Editor structural problems meant that the recently organisations. Tel: 01276 607158 completed ten-storey concrete core had [email protected] to be partially demolished. The problem www.concrete.org.uk October 2020 concrete 3 1-7OctoberCONCRETE2020.indd 3 29/09/2020 11:50:20 WORLD NEWS NEWS IN BRIEF Concrete targets UK • Appointment Simon Willis, CEO of Hanson UK, has been appointed Mineral Products Association (MPA) chair, succeeding carbon-neutral future Martin Riley, senior vice-president at FORTY of the world’s leading cement reuse and recycling of concrete and Tarmac. Nigel Jackson, CEO at MPA, said, and concrete companies recently buildings, and harnessing concrete’s “Simon’s wide industry knowledge and unveiled a joint industry ‘2050 ability to absorb and store carbon experience will be invaluable as we play Compact mixing Climate Ambition’. The ambition from the atmosphere. our part in the economic recovery, while LIEBHERR has responded to growing continuing to operate safely and securely statement demonstrates the The climate ambition sets out commitment of the industry across a global vision for the long-term demand for smaller, reliable mixing and tackle major issues.” plants by launching the LCM 1.0. The the globe to drive down the CO2 sustainability of concrete, the vital footprint of the world’s most used building material that has shaped the compact plant will allow contractors UK • Training man-made product, with an aspiration modern world.