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| Bridge construction to connect the harbours of Danzig |
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Project:
Bridge Construction
Location:
Danzig Harbours |
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| Both of Danzig’s harbours are vitally important for the economical development in the North of Poland. In addition to extending the harbours themselves, in 1999 the Danzig authorities have therefore decided upon an extensive package of infra-structural measures, to optimise the connection between the harbours as well as communication with the interior.
MC-Bauchemie contributed competent advice and its wide product-range to the realization of the most challenging section of the connecting road, the Trasa Sucharskiego: the 381 meter long Jan Pawel II bridge over the Martwa Wisla river.
The greatest challenge during the construction of the single-pylon suspension bridge was created by the difficult hydrological conditions of the substrate, which necessitated extensive foundation structures. The 97 m high pylon stands on 59 piles and a 5000m³ foundation. Abutments and bridge supports are built on more than 100 piles with diameters of 1.50 m to 1.80 m which are sunken-in to a depth of 30 meters. All piles have been manufactured with Muraplast FK 88 (FM) and Murasit-Retard 360 (VZ). This permitted an optimal adjustment of the flow-characteristics of the concrete as well as the processing times to the conditions.
When the pylon was cast, Muraplast FK 61 gave the material high early strength and a stable consistency. While Zentrizell AFC (LP) guaranteed frost-/dewing-salt resistance for the lower segment, Poland saw the first use of a silica-suspension at the top-section: due to its small particle-size (50-100 times smaller than the cement-particles), Centrilit Fume S (SF) fills the spaces in-between the cement-particles. The product also reacts with the free lime into calcium-silicate-hydrate, a permanent compound with a constant volume. The result is a dense, highly corrosion-resistant concrete with an exceptional flexural and compression strength, which is needed in this segment of the load-bearing bridge-element.
Muraplast FK 88 (FM), as well as Zentrizell AFC (LP) were used in the application of the road surface.
Over the course of the entire construction period, more than 3000 concrete samples have been taken on the construction site and during concrete manufacture. The achieved strength categories where one category higher than demanded. The impermeability, the water absorption capability and the frost-resistance of the concretes were also better than requested in the recipes. Since its completion the Jan Pawel II bridge has become one more exceptional sight for Danzig.
Marian Gorczyüski & Marian Wojcik |
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