Rehab for concrete cover of clinic

Around 110 years after it was founded, the KJF Fachklinik Prinzregent Luitpold is still in operation as a paediatric clinic. Rehabilitation, treatment and therapy sometimes require long stays, which is why school lessons for the young patients also take place in the clinic's own school.

The old building had to be renovated, but operations continued. The core refurbishment of the clinic's kitchen and dining rooms also involved the old, damaged ceiling made of unreinforced tamped concrete. Around 170 square metres of ceiling area in the main and scullery kitchens as well as the cold rooms on the ground floor had to be repaired and raised to fire protection class F90. To do this, the skilled labourers first removed the existing Rabitz ceiling. This revealed localised defects and pebble nests in the vaulted concrete and old recesses or less compacted concrete, which had to be repaired. Contamination and foreign objects were also removed. The surface of the tamped concrete cap ceiling was prepared by compressed air blasting with solid abrasives to a roughness depth of > 1.0 mm. The craftsmen then applied sprayed concrete to the vaulted ceiling in a layer thickness of 4.0 cm to achieve the specified minimum component thickness of 10.0 cm and closed defects in the vault structure in the same operation. The surface remained rough.

The team of experts opted for "StoConcrete Repair Prime TS 136" for the repair. The system is ideally suited to the requirements of the historic ceiling, as it is specially developed for low-modulus substrate concretes of old concrete class A3. The existing concrete had a lower strength, as it was compacted or tamped by hand (in accordance with the time of construction). The polymer-modified concrete repair "StoCrete TS 136" is applied using the thin-phase conveying method. This enables low rebound, large layer thicknesses in a single pass and application during ongoing operations. In Scheidegg, lessons could continue undisturbed in the rooms above.

The "KJF Fachklinik Prinzregent Luitpold" is located in Scheidegg in the Bavarian-Swabian district of Lindau (Lake Constance). Built in 1912 and opened in 1916, the paediatric clinic was established thanks to a donation from the then Prince Regent Luitpold. It was intended "900 metres above sea level, in a wooded, windless location" for the recovery of city children. The buildings are now a listed building and still house a specialised clinic for children and adolescents.

Object
KJF Fachklinik Prinzregent Luitpold, ceiling renovation, Scheidegg

Building Owner
Catholic Youth Welfare Centre of the Diocese of Augsburg e.V.

Architect
FG Architekten und Sachverständige GmbH, Sonthofen

Structural design
böller bischof Beratende Ingenieure PartGmbB, Lindenberg

Application
Rauer Bau- und Betonsanierungs GmbH, Dietenheim

StoCretec expertise
StoConcrete Repair Prime TS 136
StoCrete TS 136

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Jan Birkenfeld
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D-38110 Braunschweig

Phone: 05307 80093 85
E-mail: j.birkenfeld@pr-neu.de