The four-lane motorway D2 connects the Moravian metropolis of Brno with the Slovakian capital of Bratislava. The Czech section of the motorway is less than 61 km long. In Slovakia it continues under the same name via Bratislava to the border crossing with Hungary for another 90 km. The construction is a part of the European route E65 from Swedish Malmö to the Greek island of Crete.
The beginnings of the D2 date back to 1974 when the construction of the section between Brno and the village of Blučina was commenced. And this section – between km 12 and km 3 in the direction of Brno – is where a reconstruction was necessary due to substantial failures (cracks, crumbling or broken corners and edges of plates). This reconstruction includes the installation of a new cement concrete pavement.
PORR a.s., the General Contractor of the construction, subcontracted the cement concrete pavement to the Austrian company ÖBA GmbH which specializes in this type of constructions. The new pavement is made from C30/37 XF4 concrete in the thickness of 280 mm.
The construction is exceptional from several aspects. From a construction point of view, in the Czech circumstances it is quite unique to install non-woven geotextile between the pavement and, in this case, the cement stabilization. From a realization point of view, it is the non-stop 24-hour work schedule that makes it remarkable. The purpose of the non-woven geotextile is to drain water seeping under the concrete plate through joints and possibly appearing cracks and to enable diverse movements of the cement concrete pavement and subbase layers. This helps minimize the creation of cracks (for example during setting and hardening of concrete). The geotextile geoNETEX A PP with mass per unit area of 500 g/m2 was produced and delivered by the Czech company JUTA a.s.
