Skip to main content

Seal of approval for Sika

Skikaflex Construction by UK-based Sika was chosen by Skanska Balfour Beatty Joint Venture to seal movement joints during the widening of one of Europe’s busiest motorways. The M25, also known as the London Orbital, handles around 200,000 vehicles every day on its busiest sections. Its widening between junctions 27 and 30 is said to be delivering much needed extra capacity to tackle congestion and improve journey times.
June 22, 2012 Read time: 2 mins
Skikaflex Construction  by UK-based Sika was chosen by 2296 Skanska 1146 Balfour Beatty Joint Venture to seal movement joints during the widening of one of Europe’s busiest motorways.

The M25, also known as the London Orbital, handles around 200,000 vehicles every day on its busiest sections. Its widening between junctions 27 and 30 is said to be delivering much needed extra capacity to tackle congestion and improve journey times.

In 2002, the London Orbital Multi Model Study (ORBIT) was tasked with addressing the problem. The ORBIT report recommended that most of the dual 3 lane sections of the M25 should be widened to 4 lanes.

The widening project is being carried out by Skanska Balfour Beatty Joint Venture for Connect Plus, working on behalf of the 2309 Highways Agency, as part of the Design Build Finance and Operate Contract for the M25.                                                   

Said to be a high performance product, Sikaflex Construction (SC) has been used to seal the vertical movement joints of the newly constructed reinforced concrete walls at the Emergency Access Routes situated behind the embankment piers of the widened motorway section.  It has also been used to seal the horizontal movement joints of the newly constructed reinforced concrete pier protection and pier strengthening at various bridge locations between junctions 27 and 30.

SC was used to create what was said to be a 100% watertight seal. A one part polyurethane sealant, it is also described as a versatile sealant that can be used for a variety of construction and civil engineering purposes. Said to be easy to install and environmentally friendly, the SC is stain resistant and can be over painted. Crucially, once installed it provides a seal that is impregnable by water, dirt, dust and chemicals.

Available in four standard colours, SC is supplied in 600cc foil sausages for easy on site application by gun. Conforming to ISO 11600 Class F25HM/F20LM, it offers a cost effective method of sealing construction joints of up to 35mm.

Chosen for what was said to be its tear resistance and ability to withstand dirt, water and chemical attack, Sika said its SC provided the ideal solution to protect the concrete retaining walls on the M25.

For more information on companies in this article

Related Content

  • Croatia-Bosnia connection
    October 2, 2018
    The Svilaj Bridge connecting Croatia and the Federation of Bosnia and Herzegovina is nearly 40% complete, according to the contractors and the Croatian Motorways Directorate. Locally, the Svilaj Bridge – financially a 50-50 project between the two countries - is part of a motorway running from Beli Manastir to Osijek and on tyo Svilaj. But the route is also part of the motorway Budapest-Osijek-Sarajevo-Plocˇ which is the Pan European Corridor Vc (Corridor 5, branch c) connecting Budapest with the Adriatic.
  • Bridge uses new forming carriage
    February 7, 2012
    The Holzmatttal Bridge for the A98 autobahn in southern Germany stretches 410m across the valley, and on this build the newly-developed Doka forming carriage TU is said to have demonstrated precisely how it drives progress with extremely short cycle times and speedy forming and stripping out operations. The underslung carriage also permits unobstructed access for site traffic.
  • Innovations in formwork aid project completion
    February 14, 2012
    Innovative formwork solutions are helping to get projects completed on or before time, meaning savings in time and money as Patrick smith reports. The use of flexible, modular formwork to create innovative structures out of concrete is helping to increase productivity and thus drive down completion time and costs.
  • ARTBA makes awards
    February 29, 2012
    A series of highway and bridge projects across the US have been recognised for their contributions to environmental protection and mitigation.