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Issue 16 | Winter 2008 www.britpave.org.uk britpave news Rail fastening systems for high speed lines and upgraded tracks in Germany have been considered as references and benchmarks for up-coming projects. Therefore, fastening systems with high dynamic elasticity are indispensable for achieving a low maintenance track with high availability. Further information in the next edition. Picture: High speed line Nürnberg / Ingoldstadt with Vossloh Fastening system 300-1 Diary Dates 2008 Britpave Conference: For all your technical issues, please note Britpave’s new email address at: [email protected] 29 & 30 September, Stratford-upon-Avon 2 Issue 16 | Winter 2008 news round up Britpave Goes Continental The 23rd World Road Congress was held in As well as booking a well positioned stand, Paris between 17 and 21 September 2007. Britpave had an attractive display which, as Britpave were situated in the UK pavilion expected, helped generate more visits and with organisations such as the Highways enquiries. The Vicki Butler-Henderson DVD Agency, TRL, IHT and Transport for London, was a popular feature once again, playing amongst others. on a continuous loop and drawing lots of attention and interest. It was also the launch of The week’s congress was a unique opportunity the new promotional item, the ‘concrete step for anyone involved in road infrastructure and barrier stress toy’ which, due to the number safety to come together and share ideas, collected, we imagine are now spread all across research and development. Attendees came the world! from all around the world, whether in an exhibitor capacity, networking or information Britpave Stand gathering. David Jones,Picture Britpave Caption and Tom Harris MP UK Pavillion at World Road Association Sparkling Gala Evening at the British Embassy The Opening Ceremony www.britpave.org.uk 3 concrete step barrier Installation of Concrete Step Barrier The benefits of collaborative working The refurbishment of the catenary lighting Key risks were identified and the following between junctions 29 and 30 of the M5 was mitigation measures agreed upon: undertaken in early 2007 as part of the Area Traffic disruption to concrete deliveries during 2 EMAC (Enhanced Managing Agent Contract). s peak hours – The two Hanson premix plants It was the most demanding scheme, in terms supplying agreed to supply over a 12 hour of concrete extrusion, completed under the shift; Honiton for the days, Exeter for nights EMAC to date. By virtue of the underlying and Saturdays. PJD worked similar shifts with contractual ethos, the EMAC provides an hour overlap to ensure continuity during opportunity to improve established practice handover periods. and to reduce costs by the reduction of waste. Acceptability of concrete – To avoid potential The existing catenary lighting columns had been s delays on site whilst concrete mix details protected by steel barrier in the central reserve. were refined, an area for trials was made Some of these columns were to remain and be available off site on Hanson premises. PJD have protected by Concrete Step Barrier (CSB); others experienced significant delays whilst concrete were to be relocated in the verge. There was also mix designs are refined to allow for local an over bridge, the supports of which were to variations in grading of regional fine or coarse be protected by Higher Vertical Concrete Barrier aggregates. To emphasise the importance Slipforming of the wall commenced on 22nd (HVCB). of this issue, Hanson appointed a Technical February at a rate of 12m³ per hour Hanson have selected PJ Davidson (UK) Limited, Key Account Manager to liaise with PJD to (PJD), as supply chain partner for Area 2 works minimise wastage. Works on site commenced with the hand laying and it was established that ‘Best Value’ would be Access for delivery vehicles - After establishing of the wall foundation on Saturday 17th February. achieved if Hanson managed the interface with s that the concrete would be delivered from Concrete was supplied at 24m³ per hour which the client, material supply and other contractors Hanson’s Exeter and Honiton plants with an optimised production and minimised waiting time and PJD provided the site expertise for the works emergency back up from Tiverton, access for delivery wagons. Over the next three days, processes. points were placed to enable easy access to 1,400m³ were laid. By early involvement of the extended supply the works from junctions 29 and 30 and from Over the course of twenty working days, 2,020m³ chain, most significantly Hanson Premix, numerous the M5 North and Southbound. Meetings of foundation and 2,400m³ of wall concrete innovations and ideas were explored that ultimately were held with all delivery drivers presenting were supplied to produce 3,034 linear metres benefited the project. These included options for details of routing, timing of activities, wash out of foundation, 6,070 linear metres of CSB and forming the base of the wall and the provision procedures and access and egress details. 270 linear metres of HVCB. On completion of of an extruded slot drain that provided increased In total, the base and wall required 4,420m³ the central reserve, 62 in-situ concrete lighting capacity whilst requiring less installation space. placed over a period of twenty days. column plinths were cast together with transitions, contraction joints and bifurcations, using another 176m³ of concrete. Overall, only 33m³ or 0.72% of concrete was rejected from the wall works, of this only 12m³ was returned to the Hanson Premix plants; the remainder was used on site. This equates to a wastage factor of only 0.24%. Regular liaison between Hanson Premix and the site team of Hanson and PJD personnel, ensured changes to the programme or scope of the works were managed effectively to mitigate adverse influence on cost and duration. The works were completed to time and to budget. Improvements and innovations were made to established working practices that reduced wastage and provided certainty of outcome for the project. The standard of finished product, in terms of profile, line and level, exceeds specification and provides a good advertisement for the concrete extrusion process and the collaborative working methods adopted. M5 Junction 29 – 30, ■ For more information, contact Tim Doyle Catenary Lighting Scheme at [email protected] 4 Issue 16 | Winter 2008 concrete step barrier Special Applications Task Group Prior to the 2007 Britpave Seminar in September, The Task Group’s plan is to interrogate each of the Britpave Special Applications Task Group these items with a view to preparing relevant data concentrated in a very specific way on the sheets that will assist designers in being able to development of concrete barrier. It was found utilise these products with confidence because all that because of this, other special fields of relevant details will be provided. development in in-situ concrete paving were In discussion with a number of our contractor not receiving sufficient attention. members, the development of product data sheets A separate Concrete Barrier Task Group has now supported by relevant research and backed by been formed and Adrian Erwee has taken over Britpave will ensure that clients are able to specify the role of Task Group Leader for the Special these products with confidence. The increased Combined kerb and slot drain in slipform Applications Task Group. limitations on insurances held by contractors furthermore make it difficult for contractors in Following the formation of the Barrier Task Group, certain instances to justify performing their own it has become necessary to review and consider designs. This approach should therefore assist opportunities where the in-situ concrete market contractors in harnessing the market place in a can be developed. During the past few months, significant way. various possibilities have been considered for development and these are listed below: The broad variety of items listed above leads to a need for participation from members who are experienced and/or interested in any of the Drainage channels and slot drain s above fields and we would like to invite any s Duct channels and specialised upstand plinths who are interested to join this group either as an email recipient only or as an email recipient s Retaining walls and active Task Group member. Please contact s Flood defence Sheridan at the Britpave office (+44 (0)1276 33160 or [email protected] ) if you s Sea defence are interested in receiving correspondence from this Task Group. It would be much appreciated if s In-situ concrete kerbs you could mention specific fields that you would s Security barriers against terrorism able to assist with developing. s ‘No fines’ concrete pavement – environmental Our target is to develop new markets and improve pavements on existing markets in the use of in-situ concrete which will increase the opportunities for Britpave s Concrete the material for slipform processes members to provide effective in-situ concrete Reinforced continuous plinth to support solutions to industry in the public and private elevated railway for maintenance inspections sectors. of undercarriage Wide Variable Troughed CSB Following on from the success of the first A slip membrane was provided between the ■ For more information, contact James construction of Wide Variable Troughed foundation and the barrier. Charlesworth at [email protected] Concrete Step Barrier (WVTCSB) on the A2 Dartford Improvement scheme, the team, Expansion joints in the structure were replicated lead by principal contractor Costain Civil in the barrier using the Britpave Steel Step Engineering, Designer Jacobs and Britpave Barrier design. Installer Extrudakerb, faced new challenges The bridges featured a raised plinth and again as they moved to the next major roads new guidance available from Britpave and project, the widening of the M25 motorway supported by Highways Agency enable this detail between Junctions 1b and 3.