Corrosion protection to sheet piles in a tidal zone. Background The picturesque old fishing village of Leigh on Sea is situated 30 miles east of London on the north bank of the Thames Estuary. With origins back to the Doomsday Book, it has a long history as a settlement dependent on the sea, and despite many changes, still has much… Read more
Additional Concrete Cover & Waterproofing to Pre-cast, Pre-stressed Bridge Beams Background Starting in 2011, the Riverside Energy from Waste (EFW) Facility at Belvedere will process 585,000 tonnes of residual waste annually to generate electricity for 66,000 homes in London. To minimise congestion on the roads, the waste will be transported by barge along the River Thames to a… Read more
Coating of cast iron shunt tunnel lining. Background The London Road Depot was opened in 1906 as the maintenance facility for the original Baker Street and Waterloo Railway, now known as the Bakerloo Line on London Underground. Capable of accommodating up to 10 trains, it uses this short shunt neck tunnel to manoeuvre them. Located… Read more
Re-pointing and stabilisation of stone faced pier in a tidal zone. Background Hartlepool’s North Pier is a mass gravity structure faced with stone that was built in the early part of the 19th century. A survey of the coastline had revealed that rising sea levels and the continual pounding of waves from the North Sea had left some… Read more
Repair & Protection of Spalling Concrete Bridge Parapets & Soffits Background Wycoller’s origins date back to Anglo-Saxon times, becoming derelict in 1890 despite being a thriving farming and weaving community. Nestling in the area known as the Valley of the Seven Bridges, Wycoller Hall is famous for being the inspiration for Ferndean Manor in Charlotte Bronte’s novel… Read more
Concrete waterproofing and repair of 4,000m² of service reservoir roofs. Background As the fourth largest supplier of water and waste water services in the UK, Scottish Water is familiar with the challenges of maintaining various retaining structures. In the quest to source an innovative range of products to arrest the deterioration of a large number… Read more
External corrosion protection of 4” diameter aviation fuel pipeline prior to burying. Background On behalf of the client, Trindad’s National Petroleum Company, an innovative solution was sought to the problem of corrosion of a buried aviation fuel supply line. Located in soft sand in close proximity to both the coastline and swamp area, the environment… Read more
Waterproof Sealing of Tie Holes on Egg-Shaped Reinforced Concrete Digester Tanks Background Designed in compliance with the latest EU standards on effluent and sludge treatment and built at a cost of £80 million, the new Reading Sewage Treatment Works is one of the most advanced facilities of its kind in Britain. The cast in-situ egg-shaped,… Read more
Repair to internal concrete staircases and landings suffering from carbonation. Background Dominating the landscape locally, the Radbourne Lane Water Tower was exposed to weathering which had caused damage to the internal stairwell. As the concrete had inadequate protection, carbonation had given rise to spalling of the concrete, necessitating a remedial solution. The Solution Once the… Read more
Repair and protection of rapid gravity filters and sedimentation tanks. Background Situated in one of the driest parts of the country, Ormesby Water Treatment Works was constructed in 1935 on natural, undisturbed sub-soil. After 70 years of service, the cast in-situ reinforced concrete structure was suffering from advanced deterioration, necessitating a complete refurbishment as part… Read more
Waterproof Internal Lining for Buoyancy Cells to Prevent Water Seepage Background Named after the first British built nuclear powered submarine, the £130m Valiant Jetty has been designed to serve the latest Astute Class submarine. Constructed in dry dock by Amec-Morgan Est JV at Inchgreen, Greenock, the 44,000 tonne jetty was towed by tugs to its final… Read more
Waterproofing sub-structure concrete on new build development. Background Balfour Homes is one of the North of England’s leading house builder. At its prestigious Kinderlee Mill Development at Chisworth in the Peak District, the magnificent stone built cotton mill, dating back to 1804, is being converted into a range of contemporary apartments and townhouses whilst still retaining the original appearance and… Read more
Waterproofing of Concrete & Construction Joints on 6,000m² Control Tower Background During construction of this dam on the Ifrin River in Northern Syria it was found that the concrete used in the Control Tower was weaker than originally specified and therefore more vulnerable to water ingress. Moreover, the construction joints were not watertight and urgent work was… Read more
Chemical resistant lining of concrete waste water treatment tanks used in the textile industry. Background As one of the world’s leading fabric finishing companies, Mascioni faces a large number of maintenance problems at its 45 hectare facility in Cuvio. One of the main challenges is the deterioration of the large waste water tanks holding waste… Read more
Repair and protection of concrete surface suffering from soft water attack and erosion. Background Built over 30 years ago, Hopcott Service Reservoir, situated close to the seaside town of Minehead in Somerset, was suffering from attack by soft water causing severe erosion of the concrete. A high priority for water authorities is conservation of valuable… Read more
Concrete Repair of Bridge Columns Suffering from Chloride Ion Corrosion Background The picturesque old fishing village of Leigh on Sea is situated 30 miles east of London on the north bank of the Thames Estuary. With history back to the Doomsday Book, its development was accelerated by the arrival of the London-Tilbury-Southend railway line in 1854. Belton… Read more
Concrete repair and protection of 2,000m² surface suffering from soft water attack. Background Serving 3 million customers in the heart of Britain, Three Valleys Water has been supplying water for more than 130 years and is committed to delivering a high quality water service to all its customers. Aggregate in the cement matrix was exposed… Read more
Protection against Chloride Ingress from De-icing Salts & Freeze/Thaw Cycling on Alpine Bridges Background Motorway bridges in this Alpine region are exposed every winter to sub-zero temperatures and heavy snow, needing liberal use of de-icing salts to keep them open. Such salts, combined with frequent freeze-thaw cycling, impose a heavy burden on reinforced concrete structures… Read more
Protection of concrete columns suffering from soft water attack. Background The structure of the Gowanbank Service Reservoir is supported by a total of 170 circular concrete columns, each close to 5 metres in height. Soft water chemical attack had caused erosion of the cement binder, leaving exposed aggregates on the surface with potential for further… Read more
Protection of concrete columns and bases suffering from soft water attack Background Three Valleys Water is one of the UK’s leading water and sewerage companies serving more than 8 million people in the heart of Britain. Harefield Service Reservoir No 3 forms part of its network responsible for supplying 2 billion litres of water per… Read more
Repair and waterproofing of one of the UK’s largest storage reservoirs. Background Frankley Water Treatment works is situated at the end of pipelines that run over 73 miles from the Elan and Claerwen Valleys bringing water to supply Birmingham and surrounding areas. The underground reservoir used to store the treated water, like so many elements… Read more
Repair and protection of underground concrete outfall tank suffering from chemical attack. Background Southern Water operates 400 sewage treatment works and their facility, located on the outskirts of Eastbourne, was constructed in 1990. The reinforced concrete of the underground outfall tank was failing due to acidic and bacterial attack above the water line, necessitating a… Read more
Waterproofing of reservoir roofs. Background To provide a structure for its above-ground maintenance needs, Scottish Water formed the HAGAM scheme in order to manage the 25 service reservoirs servicing the north of Scotland. As the 4th largest water service provider in the UK and the 12th biggest business in Scotland, special demands are placed upon… Read more
Waterproofing of 11 concrete hangar roofs totalling 2,000m² at major AirForce base. Background RAF Leuchars, based close to Dundee in Scotland, is the principal operational fighter station for the Royal Air Force and one of the busiest bases in Air Command. RAF Leuchars plays a critical part in the defence of the UK and its territorial waters. It… Read more
Waterproofing & Protection of Water Intake Passages Suffering from ASR (Alkali-Silica Reaction) Background Mactaquac Dam is part of a hydroelectric plant on the Saint John River in the Canadian province of New Brunswick operated by NB Power Corporation. It has a capacity of 672 megawatts with 6 turbines generating 20% of New Brunswick’s power. Building started in… Read more
Waterproofing of reinforced concrete roof over a plant room. Background Opened in 1852, King’s Cross Station now handles 47 million passengers a year and is famous as the departure point for the Hogworts’ Express in the Harry Potter films. To prepare for the 2012 Olympics, £400m has been allocated for upgrading, with the Eastern Range being converted into offices… Read more
Repair of concrete storm water overflow & settlement tanks. Background Wigan WWTW, situated near to the River Douglas in Lancashire, is one of the largest treatment works in the North West, but United Utilities wished to increase the capacity of the works and reduce overflow into the river. Designed by GHA Livigunn, the improvements included… Read more
Waterproofing of concrete aeration basin and sealing of leaking kicker joints. Background The aeration basin building at the Weiser Wastewater Plant consists of four inter-connected concrete tanks as well as the head works for the sewage treatment plant. This part of the plant dates back to 1987 and consists of cast in-situ concrete. Despite several… Read more
Waterproof, high strength friction wearing course for car park decking. Background Q-Park stands for quality in parking with smart, safe and convenient facilities which are noted for stylish interior design. Q-Park designate individual parking bays with a distinctive black box which contrasts with a lighter surround to make it easy to park correctly. At the… Read more
Repair and protection of 3000m² of concrete on BAFF treatment tanks. Background Oldham WWTW has undergone a £10m refurbishment to improve the quality of the treated effluent. Biological Aerated Flooded Filters (BAFF) are made up of a series of reinforced concrete tanks, where a medium of polystyrene balls are used to grow bacteria to treat… Read more