Photos: Maciej Lange
The Wroclaw Municipal Stadium is the third largest in Poland. It is located in the west of the country, close to the Czech and German borders. The stadium is architecturally structured in the style of a lantern. Its distinctive shape is highlighted by the innovative design of its roof and external walls. The facade is covered by a lightweight glass fiber mesh fabric that is coated with Teflon, giving the whole of the massive building structure a unique transparency.
This quality is accentuated by the almost unlimited colored designs that can be produced within the facade using a sophisticated lighting system that creates quite stunning visual effects.
European Football Championship
The facade and the roof structure are anchored into the foundations all around the base of the stadium. The 6-storey stadium has a capacity of 42,771 spectators, all seated and all covered, and includes extensive VIP and business facilities, with numerous restaurants, bars and retail areas. All types of sports and events are now held in the Municipal Stadium, the biggest so far being the staging of several European Football Championship games in 2012.
Cement-based grout supporting steel structures
What were the challenges that Sika Poland faced during the building? An expanding, pourable, consistent cement grout was required to grout the steel support stanchions and rings into the reinforced concrete foundations. SikaGrout® , which is polymer-modified, expansive and cement-based, was selected to grout around the steel support structures and their holding down bolts into the reinforced concrete foundations.
Sealing of joints between precast concrete units
Additionally, the joints between the precast reinforced concrete elements that were used to form many of the internal walls, floors, terraces and stairways, all had to be securely and durably made watertight. The Sikadur-Combiflex® System was used to seal the joints between the precast reinforced concrete units in the structure. This is a high-performance, over-banding, sealing tape system based on a combination of structural Sikadur® epoxy adhesive and a Sikadur-Combiflex® polyolefin membrane tape. This system allows and accommodates joint movement in any direction, including beyond the capability of traditional joint sealants.
Waterproofing of exposed areas
All of the exposed and trafficked surfaces, including some of the car parking areas built over other facilities, had to be waterproofed. It was stipulated that the waterproofing solution must conform to German specifications ZTV-ING part 7, sections 1 and 2, to be suitable for use beneath asphalt-wearing surfaces in some of these areas.
Wood floor finishing for acoustic insulation
What is more, many of the internal facilities, such as restaurants and VIP areas etc., needed a high-quality wood floor finish, but with minimal noise transmission from the anticipated heavy foot traffic. SikaBond®, an elastic adhesive, was selected for full surface bonding of the wood floors throughout the interior of the stadium. This material was chosen due to its proven track record in a great many prestige buildings and similar facilities around the world, providing acoustic insulation and noise reduction by up to 14 dB.