In early May Structural Renovations were employed to carry out emergency repairs to the reinforced concrete at Carnival Pool in Wokingham.
The leisure complex was constructed in the early 1990’s and following a detailed survey of the undercroft areas of both the main and learner pools it was established that extensive repairs would be required to the supporting beams, soffits, drainage channels and external walls of the pools.
The complex is planned for redevelopment in 2020 but in order to keep it operational until then a repair scheme had to be implemented that would provide the required protection in an aggressive environment.
Working closely with the local authorities consulting engineer it was agreed that defective concrete would be removed and any exposed reinforcement treated prior to reinstatement with a polymer modified repair mortar. In certain locations where the warm, moist atmosphere, combined with chemical attack was most likely to accelerate the deterioration of the concrete a migrating corrosion inhibitor (MCI) was applied.
Additional works instructed included waterproofing the drainage channels, both internally and externally, using a thixotropic modified polymer coating, complete with an embedded elastomeric composite tape.
This 6 week project was completed on time and due to careful programming the public parts of the complex were required to be closed for only 2 of those weeks.
Structural Renovations commenced work in October this year at this purpose built residential development, comprising 3 linked blocks, in southwest London.
Our brief was to survey, prepare and repair the exposed faces of the reinforced concrete slabs, which form the floors and roof.
Previous repairs and coatings had deteriorated, together with additional defects that had developed since the last maintenance scheme and the survey identified extensive damage.
All defective concrete was removed back to sound material and the edges square-cut to prevent feather-edging. Any exposed reinforcement was cleaned of corrosion before being treated with 2 coats of corrosion preventative primer. The prepared defects were reinstated using a polymer rich, cementitious repair mortar, back to the original surface profile.
Following completion of repairs the previously decorated concrete was pressure-washed to remove loose and failed coatings, to form a stable substrate, upon which a coat of water based, epoxy modified surface primer was applied. The primed surfaces were then treated with 2 coats of a pigmented, anti-carbonation coating to afford protection to both repaired and existing concrete but also to provide a uniform aesthetically pleasing finish.
The works were accessed from a fixed scaffold and completed within a restricted programme period, to the satisfaction of our client.
Structural Renovations have recently completed a large concrete repair and coating project at a senior school in Maidenhead, Berkshire.
Furze Platt Senior School is a mixed school, with 1,250 pupils, which opened in 1963.
The School is comprised of multiple flat roofed, concrete framed buildings of varying heights, typical of the period they were constructed.
We surveyed the buildings in 2016, in order to provide the Governors with budget costings, which allowed them to apply for the required funding, which was awarded to them in May this year.
Originally it was planned that the works would be phased over 2-3 years but the decision was made to complete the entire project in a single phase, during the summer holidays.
A significant amount of scaffolding was required to the 21 elevations being repaired, which necessitated us mobilising prior to the closure of the School, whilst the pupils and staff were still present. Extreme care had to be taken to ensure pupils and staff were excluded from working areas and designated safe routes were implemented.
Once the School closed we commenced our works, which involved hammer testing and close visual inspections, prior to breaking out, square cutting, cleaning reinforcement and reinstatement using Flexcrete Technologies specialist repair mortars.
Following the repair process, all concrete was pressure washed and subsequently coated using Flexcrete Technologies pigmented anti-carbonation coatings.
In order for us to hand the School back in time for the beginning of the new term we were required to work both weekdays and weekends, at all times liaising closely with the School’s facilities team.
Although tightly constrained by time we completed the project as planned and in line with the budgeted funds.
Structural Renovations have recently completed the 1st phase of structural repairs to a late 1960’s office block in South East London. Edinburgh House is currently being completely redeveloped as part of a £16m project that will provide 6,500m² of space. Once complete the building will be used as a flexible working environment for start-ups, through to large organisations, the clients’ ethos being, to provide a community in which people can network and collaborate.
Our works have included surveying the concrete slabs, columns and walls, followed by extensive concrete repair. The repairs were completed by both hand and pourable techniques, using Fosroc repair products, where the finish will be left exposed as part of the design scheme.
We will remobilise in September for the 2nd phase, which will include major poured repairs to redundant service voids in the ground and lower ground areas.
External concrete repairs and coatings have recently been completed by Structural Renovations at The Charterhouse School near Godalming.
The school was established in 1611 in London and moved to its current site in 1872. Since then buildings have been added, including the 2 storey Art Studio constructed in the 1970s, to accommodate the growing numbers of boarders
Following previous successful works to the swimming pool, budget figures were provided for the external concrete repairs and corrosion control to the Art Studio. Subsequently the contract was awarded for completion during the school holidays.
The ground floor concrete frame and soffit to the first floor cantilever slab were pressure washed and concrete repairs carried out using the Sika MonoTop repair mortars. Margel capsules were installed as a vapour phase inhibitor, followed by the application of a SikaGard water based elastomeric coating to provide a uniform protective coating.
Other works of a decorative nature were carried out to enhance the aesthetics of the completed works.
As part of the hotels major refurbishment Structural Renovations have been awarded the contract to undertake external repairs and waterproofing of the concrete surfaces.
This large imposing hotel overlooks the English Channel and the harsh coastal environment has been a major contributory factor to the defects identified.
Concrete repairs were carried out to the balcony edges and detailed cornicing using a hand-placed repair mortar, Sika MonoTop 615 primed with Sika MonoTop 610.
Failed coatings were removed from deck areas, such as balconies and a new liquid applied membrane was applied using Sikalastic 625 accompanied by a 20 year guarantee for the completed works. Existing movement joints were replaced with Sika Hyflex 250 Facade.
Additional phases are due to commence later this year.