Plus City, Pasching

Plus City, Pasching, Austria

“Plus City” - Austria’s largest screed building in 2004in the Paschinger shopping centre – over 32.000m2 produced in record time

This is how the property developers imagined it would be: all joining forces and creating a record-breaking new building in the Paschinger City, “Austria’s largest screed building site in 2004”. When the architects´ office’s Dipl. Ing. Karl Plötzl and Zegermacher, the ARGE Plus City, Strabag – Dywidag, were commissioned with the new building an extremely tight schedule was stipulated. The old buildings were to be torn down, 61,800m2 earth was to be excavated, 31,000m2 concrete laid, 48,250m2 shuttering fitted, 732 columns raised, 4,500 t reinforcement and 32,000 m2 screed laid. They were given just 7 months to complete this. The whole thing represented 85,000 man hours. As only 14 days were available for the screed drying phase, the screed laying company Polzinger was particularly stretched to complete the stipulated 7 cm thick screed in time (drying phase usually takes 5 – 6 weeks or more). Only the well-known Knopp Screed Accelerator was going to be tough enough for the job that Polzinger GmbH, Offenhausen had to do. Upon the advice of Alfred Koch, Head of Sales for Knopp Austria, the proprietor, Gerhard Polzinger, opted for the Knopp Contopp® Accelerator 15 and 20 Compound plus Hardening Agent 35. These are able to dry out the screed within 4 – 10 days. This meant Polzinger was playing safe and could successively and punctually lay the screed to the full satisfaction of the architect team and the developer. The screed was completely ready to lay between 7 and 10 days. We asked Mr Polzinger what he thought was particularly special about the Knopp product: “It already started with the mix. You simply add the right amount of Contopp® Accelerator 20 Compound compared to the concrete screed; mix and you’re ready. Thanks to the homogenous composition of the mortar, the application and subsequent smoothing went without a hitch. Due to the truly fast laying we were able to save on time and manpower. This is particularly important in this day and age. We were surprised by the high bond stress of 1.5 - 2.5 N/m. Polzinger GmbH, despite the declining economic situation in construction! Since 1992, the Offenhausen-based Polzinger, the specialist company for screed and floor laying, complete thermal insulation, plastering and facings, with its now 150 employees, has been able to increasingly develop its position in Austria and neighbouring countries. To ensure customer proximity, an additional branch was set up in Salzburg. Customers particularly hold in high regard the quality of the consultation, the punctual execution, the fast and precise work, the high flexibility and something that doesn’t go without saying: the fact that they leave a clean construction site behind them. To ensure transportation and punctuality, they have 60 vehicles in their car pool. Polzinger: “whether it’s a large or small site – we’re well equipped for the future”.

Reference data
Construction project
Plus City, Pasching, Austria
Size in m²
CONTOPP® Accelerator 15 Compound, CONTOPP® Accelerator 20 Compound, CONTOPP® Hardening Agent 35
Work execution
Cement screed on polythene
Strength class
8 days

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Please refer to the technical datasheet under DOWNLOADS for more information about handling and mixing ratios.