Tarmac

St Pancras StationProject briefLimelite Heritage Mortars and Grouts to help restore St Pancras station buildings to their Victorian splendour.The ProjectMortars and Grouts from Tarmac Building Products, the leading manufacturer of blended cementitious products in the UK, have been extensively used in the historic conservation of St Pancras station.The major redevelopment of St Pancras includes the enlargement and refurbishment of the ticket hall, restoration of St Pancras Chambers as well as new passages to the existing Tube ticket Hall and Channel Tunnel Rail Link. PAYE Stonework and Restoration, a leading conservation specialist turned to Pozament for its expertise in pre-blended products formulated specifically for historic conservation work.A hydraulic lime-based combination of materials that offers sympathetic controlled strength was blended by the team to meet the specific requirements of PAYE Stonework and Restoration.Help from Tarmac Building Products – Limelite Heritage Mortars & GroutsAround eight tonnes of lime based, cement-free materials including Heritage Mortar 4 and Heritage Grout 7 were supplied to point the brickwork joints of passages to the existing tube ticket hall and Channel Tunnel Rail Link and to repair sofits in the Grade I listed St Pancras Chambers.Problems facedSt. Pancras Station is a Grade I listed building, meaning it is a building of exceptional interest and is one of the best Victorian buildings in central London. It has been voted one of London’s favourite landmarks and so great care had to be taken with the restoration work.OutcomesThe extensive redevelopment of St Pancras and Kings Cross Underground was completed by the end of 2007.  QuotesGary Hodges, project manager, PAYE Stonework and Restoration said, the range of pre-blended heritage grouts and mortars were ideal for this restoration project. Heritage Mortar 4 was highly suitable for the St Pancras Chambers repairs, reaching maximum strength within 7 days rather than the usual 90 days for other materials.Stuart Allerton, Quality & Technical Services Manager, Tarmac Building Products said, The Limelite Heritage range has specifically been designed to be sympathetic with historic buildings and caters for a number of applications. Our re-pointing mortars and free-flowing grouts are manufactured at our Swadlincote facility in Derbyshire to order, typically within five working days.·      Location: London·      Product: Limelite Heritage Mortars and Grouts·      Timescale: Completed in 2007

Project brief:A monumental restoration project for the iconic St Paul’s Cathedral spanning 15 years and costing £40 million. It was the first comprehensive restoration project that the Cathedral has gone through and this extensive cleaning, repair and renovation programme was one of the largest of its kind ever in the UK.The Project:It doesn’t get much more high profile than this when it comes to historic building restoration. As part of the London skyline for over 300 years, the requirement was for materials that perfectly balanced the strength and performance to do the job with the delicate nature of working with such a fragile and weathered structure. The sheer scale of the project also dictated the need for an extremely consistent product.Help from Tarmac Building Products – St. Pauls Grout Mix:Pozament, from Tarmac Building Products Ltd, boasts the heritage range of Limelite Grouts and Mortars specifically designed for such tasks. Yet in a project of such epic proportions and with the stakes so high our technicians instead produced an all new low strength blend of PFA, lime and special additives, that was capable of penetrating the fine voids and fissures in the Cathedral’s structure, whilst remaining sympathetic to the existing materials.The new grout, now named St. Paul’s Grout Mix, is easily mixed and in addition can be placed using gravity feed techniques, which are often used to ensure low pressures that are needed to avoid damage to delicate structures, such as in the case of St. Paul’s Cathedral.St. Paul’s Grout was designed to achieve a low strength of approximately 2.0 N/mm2 at 28 days, which was sufficient to strengthen and fill voids in the heartening of the masonry walls at St. Pauls Cathedral. The mix also contains a special plasticiser/wetting aid, so that when used at a water solids ratio of 0.4, a very fluid mix capable of penetrating fine voids and fissures is produced.Outcomes:The St. Paul’s Restoration project was finally finished in June 2011. To this day Tarmac continue to produce the St. Paul’s Grout when required and since then, it has been used successfully on many similar restoration projects including York City Wall, Winchester Cathedral and other English Heritage projects.

This high profile entertainment and tourist venue in Bishop Auckland, required a surface for the large pedestrian area next to its main arena. Ulticolour was chosen in a buff colour, which suited the visual theme of the site. The client was happy with the speed of the work and the smooth, even low maintenance finish.

Ulticolour, Tarmac's coloured asphalt was used to surface the redeveloped Promenade at Morecambe. The buff colour complemented the clean, modern design of the new sea wall. It provided an accessible, trip-free surface with minimal maintenance requirement. The existing surface was an old hot rolled asphalt which was suffering from cracking. To resist cracking in the new surface and extend pavement life, ULTIMAT SAMI, Tarmac’s innovative stress absorbing membrane interlayer was also used. For more details visit the Tarmac website.

The client, a rugby club in Leicestershire, had recently upgraded their facilities to include new function rooms. They were now planning to improve their 4500m2 car park to replace the existing loose planings with a safe, permanent all weather surface. Using Ultifastpave reduced the construction time by half compared to conventional surfacing, generating a significant cost saving for the client. For more details visit the Tarmac website.

The essential plaster for restoration and repairs Older houses rarely feature the levels of insulation and damp proofing we take for granted today, so damp walls and brickwork are often a problem. That’s why Limelite is the clear choice in repair and restoration projects. Following treatment with an injected damp proof course, Limelite will help older, damper properties dry out by allowing balanced moisture movement through its coating. The superior workability of Limelite products means they can be applied to any sound substrate as easily as conventional gypsum based plasters. They can even be used on timber and lath walls, which still crop up in refurbishments after existing plaster layers have been hacked away.

Project BriefThe James Dyson Building and the Dyson Centre for Engineering Design at the University of Cambridge officially opened in May 2016.The technology hub was designed by Nicholas Hare Architects and funded in part by a £8m donation from the James Dyson Foundation, and will give some of the world's brightest young engineering students access to advanced laboratories.The Department’s priorities were for a low-energy building (targeting 100kWh/m2/annum total) that would showcase the state-of-the-art work of the Department and be sustainable.The ProjectThe James Dyson Building is located within the Cambridge Central Conservation Area and is also adjacent to the Grade II listed Royal Cambridge Hotel. Care was taken with both the scale and materiality of the building which was closely scrutinized by the Cambridge Design and Conservation Panel.The James Dyson Building provides flexible and highly energy-efficient research, seminar and meeting spaces for post-graduate students at the University of Cambridge’s Department of Engineering.Linked by an atrium to the existing Department buildings, the new facility is located on a prominent and sensitive site within a conservation area and at a major gateway into Cambridge.Much of the concrete frame of the building is exposed internally to assist in maintaining thermal stability and natural ventilation is encouraged using a series of chimneys running through the building.Research groups worked with the contractor to incorporate active stress sensing of the concrete frame and low-carbon, magnesium blocks were also used in the build.A large proportion of the construction cost was met through a generous donation by The Dyson Foundation.Help from Tarmac - Limelite Heritage Lime MortarWe supplied Limelite Heritage Hydraulic Lime Mortar in bulk bags & 25kg bags to the new James Dyson Building in Cambridge. The product was a pure hydraulic lime bedding masonry mortar M2.5 but due to its versatility, durability and sustainability met all the requirements of the architects. This lime mortar is ideal for projects such as this one because it is a cement-free product and so recreates an appearance in keeping with the history of the adjacent buildings with a modern aspectOutcomesThe James Dyson Building for Engineering will support world leading research in areas including advanced materials, smart infrastructure and electric vehicles. Fibre-optic sensors in the foundation, piles, columns and floor feed back live data, about temperature and strain – providing a picture of how the building is behaving. The result is a building that’s more of a living creature than a passive block of material: we can ask the building how it’s feeling, and the building can reply.The Dyson Centre for Engineering Design will teach students about the design process – and provide space for over 1,200 undergraduate engineers to conduct their research."This new space for Britain’s best engineers at the University of Cambridge will catalyse great technological breakthroughs that transform how we live."Sir James DysonAWARDSRegional Finalist: Civic Trust AwardShortlisted: RIBA East AwardShortlisted: RICS Award - Design Through Innovation

Conserving a Grade I listed building with renovating plaster.Halifax’s Grade I listed Piece Hall is a true monument to the town’s industrial heritage. As part of Calderdale Council’s ambitious plans to conserve the building and transform it into a cultural and commercial hub for Halifax, a series of delicate remedial works were outlined to future-proof the structure’s original features and ensure it would be able to live up to the rigours of 21st century life. Under the schedule of works, Tarmac’s Limelite renovating plaster was chosen to provide a durable solution which was both sympathetic to the age of the building, yet robust enough to provide long-lasting results.The ChallengeFirst constructed in 1779, the Grade I listed Piece Hall takes its name from its original use as a cloth hall, where local weavers were allowed to sell their ‘pieces’ at the height of the industrial revolution. As an iconic reminder of Halifax’s prominence in the Georgian wool trade, the site is understandably a treasured landmark for local people.The aim of the Piece Hall transformation project was to conserve the historic fabric of the building and create an outstanding heritage destination fit for the 21st century. This would see the property, which consists of 315 rooms centred around a 66,000 sqft piazza, return to its previous grandeur and be reinvented as a new cultural and commercial centre for the town.The Piece Hall transformation project was delivered by Calderdale Council and made possible by funding from the Council, a generous £7 million grant from the Heritage Lottery Fund – thanks to National Lottery players – and kind support from both the Garfield Weston Foundation and the Wolfson Foundation. The Piece Hall is now operated by an independent body, the newly formed charity The Piece Hall Trust.It was vital that a specialist heritage renovating plaster was specified, to ensure that any remedial work undertaken would be in keeping with the property’s original features and sympathetic to the materials used during the building’s original construction in 1779.The plastering contractors chosen to undertake the work, Manchester Screeding Contractors (MSC), were challenged with plastering the inside of the iconic arches which surround The Piece Hall’s piazza, as well as re-plastering walls within a number of rooms on the ground floor. Given the need to use a specialist heritage plaster, MSC turned to Tarmac’s Limelite team for help.For the interior work, damaged and ageing plaster had to be removed, revealing solid stone walls which needed to be plastered in keeping with the heritage of the building. Time and weather had also eroded the exterior arches, and an appropriate solution needed to be found.Installation time was also a challenge on the project as the construction phase was nearing hand-over to The Piece Hall Trust, with the building due to be reopened to the public in August 2017.The SolutionTo satisfy the specification, MSC first chose to use Tarmac’s Limelite Easy Bond as a primer, given its ability to effectively control suction and salts, as well as improve the level of adhesion when working with difficult substrates. Following this, two coats of Limelite Renovating Plaster were applied as a backing plaster to the surfaces to remove undulation.Tom Emery, Specifications Co-ordinator at Tarmac’s Limelite division, comments: “A traditional lime plaster could take months to dry out whereas renovating plaster only takes 24 hours to dry per coat. This was essential in helping the team to cope with the tight timescales of the project.“Moisture, damp and mould growth were also found in the building. Renovating plaster is ideal in scenarios like this, as the level of breathability it offers will allow moisture to easily pass through it. It is this breathability that will significantly reduce the likelihood of damp occurring.Tom continues, “The renovating plaster was followed with a final coat of Limelite’s High Impact Finishing Plaster. The High Impact Finishing plaster is extremely durable, which is ideal given the municipal use of the building. What’s more, it’s great for use in heavily trafficked areas as it provides a shell to the backing plaster.”In total, seven tonnes of product were supplied to the project in the two-month timeframe, with MSC working through the weekends to get the job done.Karl Hodgkiss, Managing Director of Manchester Screeding Contractors, commented: “Internal and external plastering as well as restoration plastering are key specialist areas for our business, and this was a significant project for us that we were excited to be a part of. I had used Limelite’s renovating plaster before in smaller quantities and knew it would provide a breathable covering for the original stonework.”

A busy Leeds Freightliner container terminal located to the South East of Leeds needed replacement of a number of sections of the external paving. The site is subject to constant traffic and extreme loading, with loading vehicles weighting up to 100 tonnes when carrying a container and daily use by HGV’s. Tarmac’s TOPFORCE fibre reinforced concrete offered the ideal solution. Although TOPFORCE concretes can be used instead of conventional steel reinforcement in some applications, in this case it would be used for added durability and crack resistance in a pavement design containing two layers of steel reinforcement mesh within a 300mm slab. The fibres within TOPFORCE provide three-dimensional reinforcement throughout the full depth of the pavement. This delivers improved abrasion, impact and crack resistance and enhanced flexural strength.Find out more at: https://tarmac.com/case-studies/fibre-reinforced-concrete-for-busy-transport-hub/

The new, purpose-built Community Fire and Police Station on a two acre site in Prescot required a durable surface for the main yard area, car park and access road. This was a large site, incorporated three fire engine bays, a practice drill tower and community meeting rooms. Having replaced two local fire stations it was expected to be a busy station used by a range of vehicles. With each fire engine weighing up to 13 tonnes and using power-assisted steering the new surface would be subject to extreme turning forces. It would need to offer long-term durability and loss of aggregate due to surface abrasion. After considering the options, Tarmac’s ULTIPHALT HD was chosen, a tough, high performance 10mm asphalt with advanced modified binder. ULTIPHALT HD has been proven to deliver enhanced resistance in challenging environments like container ports and distribution centres. The modified binder enhances durability but also helps to maintain workability and aid compaction, even in low temperatures.

Ulticolour offered a distinctive, aesthetic surface for this modern housing development located on the River Irwell in Salford, to the north of Manchester. The chosen buff colour matched the contemporary architectural design.

Ulticolour coloured asphalt provided a new surface was required for the extensive footpaths at a new £12 million leisure park in Snowdonia. The buff coloured asphalt perfectly matched the surroundings and provided a safe surface for pedestrians and the site staff.

Ulticolour coloured asphalt provided a new surface was required for the extensive footpaths at a new £12 million leisure park in Snowdonia. The buff coloured asphalt perfectly matched the surroundings and provided a safe surface for pedestrians and the site staff.

The challenge was to construct a roof top extension on top of the luxury hotel NOBU in Shoreditch. The plan was to add an additional 1 storey of hotel rooms, suites, dining areas and open terraces that would replace the existing planted roof. The chosen solution was Tarmac Toplight C lightweight structural concrete in a pump mix with the addition of steel fibres, ensuring maximum weight loss of 35% with no compromise on structural concrete performance.By adding steel fibres into the lightweight mix the composite metal deck system could be installed without the need for traditional expensive and slow steel reinforcement across the deck. The use of lightweight concrete, furthermore, reduced the load by 35% which meant the existing structure did not need to be reinforced or under pinned. The construction programme time was also reduced considerably.