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Endla Railway Viaduct
Endla railway viaduct, also known as the Kristiine viaduct or the „Undusk Valley“ (named after the former mayor (1961-1971) Johannes Undusk). The Endla viaduct was constructed in 1962. In 2006 in the Endla viaduct area a 1 km stretch of railway was reconstructed by Rööbasteede Ehitus Ltd. The construction was commissioned by Estonian Railways Ltd and the main contractor was VolkerRail RTE Ltd. During the reconstruction the railway-tracks were welded together, the railway sleepers were replaced and the gravel under the railway was sifted through. Also the worn sleepers and rubber pads under the sleepers, the geometry of the railway was improved and additional gravel was laid down. On the Lilleküla railway crossing the road covering plates were replaced.
At the commission of the main contractor we carried out various renovation and hydro-insulation works of the reinforced concrete of the viaduct.
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What we did
We carried out the hydro-insulation of the three old beams of the Endla viaduct and also the hydro-insulation of the joints of the fourth beam.
What we used
For the hydro-insulation the liquid membrane GRACE Servidek was used, for the protection the Servipak 12 mm boards were used and the joints were taped with GRACE Armour Tape. The linear joints between the beams and the deformation joints of the viaduct were insulated with GRACE Servseal Type B system. The new beams of the Endla viaduct were hydro-insulated before the installation with the roll membrane GRACE Bituthene 4000. The linear joints between the beams and the deformation joints of the viaduct were insulated with GRACE Servseal Type B system after the installation of the beams.