Three, four and six Broadgate were demolished to allow for construction of a 12 storey office building with two basement floors that will deliver state of the art trading facilities. Xypex was selected to replace the specified external membrane. The main reason for this change to the specification was to simplify and speed up the construction process, and reduce cost. Xypex Admix was used in the capping beam, basement walls and as a topping on the basement slab to ensure the double story basement remains totally dry. Not all walls are lined, so detailing needed to be created to manage and withhold the flow of water laterally where Xypex withheld the hydrostatic pressure.
60 Holborn Viaduct
This scheme comprised of basement, ground and 8 upper floors for office use including reconstruction of The Gatehouse will be built to the highest technical specification. Xypex Admix has once again successfully been used in this project as the sole barrier to water ingress. The basement is in the entire footprint of the site and Xypex was selected to replace the specified membrane. Part of the decision to use Xypex Admix was due to its ability to be used in concrete mixes which have a high blended cement content. Xypex is in the entire basement slab, walls and capping beam as well as the lower sections of the slip formed core which is part of the external concrete wall.
Xypex was specified by the consultant engineer to give protection to this massive basement. Used within the pile capping beam for the entire perimeter of the basement, as well as the walls and slabs. Xypex was the ideal selection as the Xypex structure within the concrete means that a continuous crystalline ‘membrane’ can be maintained even though the the basement sections will be cast at different times. So far the entire capping beam, north west block basement and energy centre have been cast using Xypex Admix in the concrete and Concentrate within the joints.
The building is one of the first in the UK to achieve both BREEAM Excellent and LEED Platinum ratings. This Skanska project is an excellent example of how Xypex Admix can be used to simplify the production process of waterproofing and concreting—both to be achieved simultaneously. One of the key influences for the decision making process of adopting the Xypex system as the waterproofing strategy was the total cost saving that was achieved through the whole package.
Site attendance and quality assurance procedures were implemented to ensure a trouble-free installation of the waterproofing. The entire basement is cast utilising Xypex Admix and Xypex Concentrate for sealing the joints.
The client and engineer utilised Xypex Admix and Concentrate within its basement slab, walls and first floor podium courtyard area to achieve a totally waterproof structure. After many years standing as a skeletal structure on the London ring road, this development is being completed. The Xypex crystalline structure enables additional Xypex waterproofing to be added at a later date with full integration with the earlier elements, extending the crystalline membrane.
The whole basement area, including the sauna and pool facilities, used in excess of 1,300 m3 of concrete containing Xypex Admix. Where there were thick upstands (in excess of one metre thick) Xypex’s ability to be applied as a coating system, as well as an Admix, came into its own as these areas were poured in “plain” concrete and coated afterwards at a time to suit the program. This meant that all of the waterproofing was a Xypex solution despite it being applied in different ways to control cost and time and meant all the waterproofing could be covered under a single warranty.
88 Wood Street Tunnel
The joints of the pre-cast unit and the basement core on level 4 of this service tunnel suffered water ingress. During the repair of the tunnel, water ingress measured 3,500 litres/hour and the entire area was under 44 mm of water during the rainy season. All joints were treated with Xypex Patch'n Plug, Dry-Pac and FCM. Xypex Admix C-1000 NF was then used in the new concrete fill.
Mountbatten Leisure Centre
Xypex Admix was used within the concrete and Xypex Concentrate in the joints to waterproof the ‘boom-pit’ of this 50 m swimming pool. The main concrete slab that the stainless steel pool liner sits on was specified without any additional waterproofing, however, there were both cracks and joints that leaked. These were repaired utilising Xypex Patch’n Plug and Concentrate, rendering the slab totally dry. Once the facility was opened a build up of water in the surrounding Alexandra Park produced leaks in the block-work & concrete retaining walls. These have been repaired using Xypex Concentrate, Patch’n Plug and Megamix I.
Worthing, West Sussex
Xypex was requested by the main contractor and specified by the engineer as the best solution to keep the swimming pool watertight as well as keeping the tidal waters of the English Channel at bay.
Xypex Admix was used in all water retaining and excluding structures as well as all basement areas as the sole defence. The process of application meant that the contractor had only to consider the placement of concrete allowing the crystalline matrix to form deep within the pores and capillaries to make the concrete watertight and durable within this harsh marine environment.
Worthing, West Sussex
The Eardley Hotel has a elegant collection of 2 and 3 bedroom luxury apartments on Worthing seafront. Used in this project to exclude & retain water, Xypex has been used exclusively within the basement to resist the tidal waters of the Channel. The ground floor slab of the front gardens is cast using Xypex Admix to protect against standing water. The swimming pool housed within the basement area is cast using Xypex Admix and then further rendered with Xypex Megamix to keep the continuity of the Xypex crystalline structure prior to final tiling.
Grand Ocean Hotel Apartments
The Ocean Hotel in Saltdean East Sussex is an iconic building in the coastal town. n 1999 the building was listed by English Heritage and in 2007 work started on this project to convert this magnificent art-deco building into 279 luxury apartments. Xypex materials were specified in this design and build project and used in its transformation. Xypex is utilized to waterproof the retaining walls and slabs of the ‘under-croft’ areas.
The Aqualibrium replaced the town’s old swimming pool, which had closed its doors some years earlier. Xypex Admix was the chosen waterproofing solution for the main 25 x 13 metre pool and the associated balance tanks. Being a community project it was part funded by the European Regional Development under the Highlands and Islands Transitional Programme, as well as funds from Sport Scotland Lottery Fund Sports Facilities. This meant getting value for money was an important part of the selection process for the waterproofing. Xypex Admix brought value engineering options that maximised protection but minimised time on site and material costs.
Barlockart Wind Farm
Dumfries & Galloway
Xypex Admix was specified by the design engineers as the stand-alone waterproof solution for the plant rooms, and plant room service tunnel to completely seal the concrete to ingress of water and aggressive ground contaminants that could corrode the reinforcing steel.
Due to it’s self healing properties Xypex Admix was a requested specification change for waterproofing the suspended first floor hydrotherapy pool shell. Xypex Admix was also used to waterproof the main swimming pool shell and balance tanks, with Xypex Concentrate ensuring water tightness at the joints. Because Xypex can be post applied it was also used in the form of Patch’n Plug and Megamix I to remedially waterproof overflow channels that had been placed in a mixture of substrates including block work and mortar.
Brighton Station Car Park
Work started on site in June 2004, and one of the first structures to be built was this two-storey car park for Network Rail. The construction of the upper deck was pre cast concrete planks supported by a steel frame - some of the planks spanned up to 14 metres with a concrete topped wearing coarse. Ultimately this concrete topping wearing coarse had to be directly lined. To ensure there was no water penetration from the upper deck on the parked cars below, Xypex was selected to provide a solution utilising Admix to waterproof the 150 mm thick in situ concrete topping to the pre cast concrete planks. The Xypex technology has the ability to self heal hairline cracks, therefore it is more suitable for this type of installation rather than pore blocking additives.
Cala Homes – Tunbridge Wells
1,200 m3 of concrete dosed with 6,100 kg of Xypex Admix C-1000 NF was applied to the parking structure under this new residential complex. 1,500 kg of Xypex Concentrate was applied to the joints.
Cottam Power Station
As part of the power upgrade, a 12m deep Coffer Dam was constructed in 2004. Cottam Power Station is located near Retford in Nottinghamshire and is adjacent to the River Trent, meaning that the upgrade works had to withstand a 6 metre hydrostatic head of pressure. The slab was designed and cast utilising Xypex Admix, which not only waterproofs but also enhances the durability of the concrete.
Erdington Water Reservoir
A total of 580 columns were treated with Xypex Concentrate and Modified at this 60-year-old potable water reservoir near Birmingham. Each column has a surface area of 12 m2 (129 sq. ft.).
Xypex Admix and Concentrate were used to waterproof and protect the basement car park of this mixed used development. Xypex Admix C-1000 NF was added to the concrete piled wall to create a complete waterproof barrier prior to the soil being excavated. This went against the original decision to erect a liner wall against the piles. The slab was also poured using Xypex Admix C-1000 NF and was jointed into the piled wall. The decision to leave the piles “fair face” meant they needed to be watertight; therefore Xypex Admix was chosen as the solution because of the unique ability to grow crystals.
The Xypex solution created a completely dry basement against two meters of hydrostatic pressure. Xypex was also used as a remedial product to repair leaks in cracked concrete that had developed under the external walkway between the flats. Xypex standard crack/joint repair was used for this.
The roof, which is also a busy walkway between two areas of the city of Newcastle, has over 300 linear metres of movement joints and it was these that had failed. The specification called for the removal of the existing movement joint, then the application of a bespoke, project specific, Xypex joint repair. Xypex Concentrate Dry-Pac and a Xypex Concentrate slurry coat were utilised before Xypex FCM was applied as a final coat to facilitate some movement at the joints without the risk of further water ingress.
The fantastic 11.2 acre regeneration scheme in Chingford, North London, this 37,000 sq. ft. Tesco superstore, 24 private sale apartments and business units was completed in September 2012. The first phase of the development was the basement car park for the Tesco store, the slab was cast against sheet piles. An external suspended service yard was built above this basement car park. The second phase consisted of the residential basement. Xypex Admixture was used to minimise time on site as it has no limitations on pore size.
This luxury, state of the art, residential home in the beautiful but very wet Lake District, has a large habitable basement with an indoor swimming pool, changing rooms, and cinema room. Xypex Admix was used in over 1200 m2 of waterproof concrete in the basement slab, walls, the indoor swimming pool shell and accompanying balance tanks that are all located in the basement. Additionally Xypex Patch'n Plug and Concentrate were used to seal the 21 cored penetrations in the pool shell, which house the underwater lights.
New River Village
The site had become redundant as a result of the construction of the new Thames Water Ring Main, but is located in an extremely wet site being adjacent to the New River & reservoir, so a complete waterproofing solution of the substructure was paramount. Concrete containing Xypex Admix C-1000 NF was specified by the structural engineer. Its self-healing nature was considered as the best solution to withhold the natural hydrostatic pressure from the local bodies of water. Along with the Admix C-1000 NF in the in-situ cast concrete, the Xypex Concentrate product was also specified within all the construction joints to ensure continuous, seamless waterproofing throughout the structure.
North Staffordshire PFI Hospital - Phase 1 & 2
Xypex Admix was chosen as it was the only solution that could meet the clients’ criteria, whilst allowing the contractor to pour the concrete in sufficient quantities to meet the programme deadline and ensure cost efficiency. One area of the O+M block is a Radiology area, with a concrete thickness up to 1.5 m; Because Xypex Admix, minimised thermal cracking, both the walls and slab were poured in Xypex Admix waterproof concrete. The walls were constructed using a RC liner wall (minimum 175 mm thick) in front of a contiguous piled wall. Within the DTC, Xypex Admix, along with Xypex Concentrate at the joints, was the solution to providing a totally waterproof environment within the kitchens. 7 m high walls and a 4 m wide section of the slab directly underneath the wall, including a thickening to provide additional support to the retaining walls, were cast in a C40 concrete containing Xypex Admix.
North Staffordshire PFI Hospital - Phase 3
All the M+E network of cables and pipes are located in underground tunnels across the site, so it was necessary to construct a 250 m long tunnel to link the new CSSD block above, to the existing network of tunnels. To enable these tunnels to be constructed within a short time frame, the contractor used the twin wall system by Kerkstoel. To ensure the structures waterproof integrity Xypex Admix waterproof concrete was used for the 160 mm thick ‘infill’ core contained between the pre cast panels. Xypex Admix was also used for the in situ slab and roof. Project specific joints were detailed which utilised Xypex Concentrate as both a slurry coat and a dry-pac, to ensure the waterproofing integrity was complete. In addition repairs were carried out in numerous areas of the existing tunnel network where Xypex Admix hadn’t been used. Materials utilised include Xypex Patch'n Plug and Xypex Concentrate.
Norton House Hotel
This 4 star hotel set in 55 acres of parkland was originally built in 1840 and was bought by John Usher of the famous Scottish brewing family in 1883. ‘Hand Picked Hotels’ undertook a large refurbishment of the hotel, included extending the facilities underground. Having used the Xypex waterproofing system previously the consultant engineers asked if the system would be able to completely waterproof the substructure that was to be constructed in insitu reinforced concrete, including the extensive leisure facilities and the swimming pool.
As a part of Liverpool’s city centre regeneration, the new 12 storey Novotel sits close to the river Mersey looking over the cutting edge designs of Liverpool’s ‘new’ Paradise Street development.With over 1,400 m2 of waterproofing requirements against hydrostatic pressure, Xypex Admix protects the power floated slabs in the plant room and car park, along with all the insitu basement walls. Additionally Xypex Admix was used to waterproof the sprayed concrete swimming pool shell of the hotels leisure facility.
One Hyde Park
The contractors used a number of Xypex Concrete Waterproofing solutions for the different areas within the complex. The concrete sections of the roof on each tower, as well as spaces within the basements including the lift cores, the tri-level basement slab, and wall areas within the basement were all treated with Xypex.
Orpington Water Treatment Plant
Upon completion of this newly constructed water treatment tank, substantial cracking occurred in the walls. The cracks were treated with Xypex Concentrate and re-profiled with Xypex Patch'n Plug. Xypex Concentrate and Xypex Modified were then applied. Further inspection has shown no further leakage.
As a major part of Liverpool’s regeneration prior to it’s year as the European Capital of culture in 2008, the Paradise Street area was high priority and very much in the public eye. Over 1,000 m2 of concrete placed in the slab and the walls was waterproofed using Xypex Admix. Project specific joint details were designed for ‘pile cap to slab’ & ‘ground beam to slab’ joints, where Xypex Concentrate was used as both a Slurry coat and a Dry-pac.
Chester Le Street
To reduce the number of joints and so lower the risk of any water ingress, the client was looking to place the 1602 m2 of waterproof concrete required for basement in the largest pours practical. The use of Xypex Admix reduced the number of vertical joints by half over that required by the original specified waterproofing. Being able to place the concrete in bigger pours also reduced the contractors time on site along with all the associated costs. Xypex waterproofs the lift pits, basement slab, basement walls, the ring beam and all the joints.
The consulting engineers specified Xypex Admix for the all of the retaining walls within the substructure to ensure a totally dry environment, whilst Xypex Concentrate was utilised as both a Slurry coat and a Dry-pac to seal the joints.
Xypex Admix was used in the 2400 m2 basement slab that was poured up to steel sheet piles, whilst a Xypex joint detail was specifically designed to allow for any shrinkage of the concrete slab away from the steel sheet piles.
RBS Global HQ
Various options were looked at with regard to the waterproofing of the in situ concrete as the different areas had different requirements of grades to BS 8102:1999. Car parking was to be a Grade 2 environment with all the other areas being enhanced to Grade 3 (a totally dry environment). Xypex was chosen for its ability to self seal cracks up to 0.4mm – thus allowing pours of any size to go ahead. Not only was Xypex Admix waterproof concrete used in the substructure and the swimming pool but some of the Xypex remedial waterproofing products were used to eliminate water ingress problems where a membrane had failed.
Rothesay Sea Defence
Southerly winds combined with a rising tide increase the flood tide and funnel water up the Firth of Clyde causing a tidal surge. This led to flooding on a 5 year cycle but, due to climate change, flooding now occurs nearly every year, meaning a solution was urgently required. Argyll & Bute council appointed consultants to design a solution; this involved the construction of a double wall with a maximum height of 1.5 m. To ensure the durability of the double stone faced wall, the in situ concrete infill utilised Xypex Admix as a waterproof system to protect the re-bar from corrosion in this harsh marine environment.
Sainsbury’s Car Park – Lombardy Retail Park
Due to the unique abilities of the Xypex system the placement of the car park deck could be reduced to just 2 procedures; installing the steelwork and placing the concrete.
Xypex Admix C-1000NF was used to ensure the concrete was completely waterproof over the composite deck. As Xypex places no restriction upon the contractor as to the size or aspect ratio of the pours the concrete was placed in large bays between a proprietary movement joints.
The Peak, Stirling Sports Village
Xypex was specified by the consulting engineers for the waterproofing of the two swimming pools along with the balance tanks. Xypex Admix C-1000 NF was used to waterproof the concrete, whilst a project specific joint system was designed and implemented for all the construction joints, including the kicker.
The Channel Tunnel
Despite many years of problem free use, it became apparent that there was continuous water ingress within certain parts of the tunnel. After technical investigations and a full technical submittal by ourselves and discussions between all parties a decision was made to use Xypex post applied waterproofing materials to alleviate the leaks permanently. The solution was a combination of the products Xypex Patch’n Plug and Xypex Concentrate used in a variety of forms and applications.
Because Xypex has no restriction on pour size or shape, Xypex Admix was the contractors chosen waterproofing solution for the basement of this new centre piece development in Gateshead. Xypex Admix was also used to waterproof the 150 mm structural topping on the suspended car park deck, loading bay ramp and loading bay deck. Additionally Xypex Admix was used to resolve waterproofing issues that manifested themselves during the construction program with a total of nearly 1,000 m3 of concrete with Xypex Admix being placed.
Over 3,250 m of Xypex Admix was specified, across various areas including being used to protect the library to (BS 8102:1999) Grade 4 ‘Archive’ level of waterproofing.The retail, office area’s and the car park were all waterproofed to Grade 3 (BS 8102:1999) level of protection at a concrete thickness of only 150 mm.
Water Supply Valve Chamber
This valve chamber is built 12 metres (40 ft) below ground level in a location where the water table is consistently very high. Individual leaks such as those isolated around pipe junctions were sealed with Xypex Patch'n Plug and Xypex Ultra Plug. All concrete surfaces (these were in poor condition with exposed aggregate) were then sprayed with Xypex Concentrate and Modified.
Most of the material from demolition of the previous building was recycled and crushed for use in the 38-meter-deep foundations. Xypex Admix C-1000 NF was used to waterproof and protect the below-grade slab and elevator pits. Xypex Concentrate Dry-Pac was then installed in all floor-wall joints followed by a slurry coat application of Xypex Concentrate.
3,000 kg of Xypex Admix C-1000 NF was used on this prestigious development on the banks of the River Thames. Three large units were constructed, each with underground car parks. The floors and walls of each basement were poured with Admix added to the concrete. Between pours, 800 kg of Xypex Concentrate was applied to all cold joints.
Worcester Library & Historic Centre (The Hive)
When there is a concrete thickness of 250mm Xypex Admix automatically produces a Grade 4 (BS:8102) ‘archive level’ of protection. For this reason Xypex Admix was the chosen waterproofing solution for all the archive areas in the structure. In addition Xypex Admix was used to waterproof the basement slabs, walls and podium deck.