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Clay passive house optimisation
The project focusses on passive house elements from straw and clay. Special interest is paid at a novel straw insulation as well as at an efficient drying process of the clay. Sustainability of the building materials is a very important aspect within the project.
Titel und Synopse
Passivhauselemente aus Stroh und Lehm stehen im Fokus des Projekts, das sich insbesondere mit einer neuartigen Strohdämmung sowie einem effizienteren Trocknungsprozess des Lehm beschäftigt. Ein wichtiger Aspekt ist dabei die Nachhaltigkeit und Zukunftsfähigkeit der Baustoffe.
Project description / tasks
Status
ongoing
Summary
Starting point / motivation
In previous building of tomorrow projects "Bauteilentwicklung" ("development of components") and "Demonstrationsbau Lehm-Passivhaus Tattendorf" ("demonstration building clay-passive house Tattendorf") a highly efficient ecological construction system was successfully developed.
LOPAS AG is planning to develop this construction system in an industrial production environment at Dobersberg in Waldviertel (Lower Austria). Regarding the aspects of sustainability (climate change, resources, waste handling), clay and strew are ideal construction materials and as renewable raw materials available locally and in a high amount. Combination with heavy mineral construction materials "bio fibre clay" with wooden frame construction is optimal, which was shown in the monitoring project AEE (Arbeitsgemeinschaft Erneuerbare Energie), institute for sustainable technologies.
Contents and goals
As most of ecological materials can´t be integrated in an industrial prefabricated production environment, the aim of the project is targeted towards the development of a modified production technology which combines material properties together with production capabilities. Technologies available are optimized for wooden frame constructions combined with prefabricated plasterboards. Demonstration project " Lehm-Passivhaus Tattendorf" has shown that the ecological foot print is six times lower than of conventional brick constructions.
Methods of treatment / expected results
Prefabricated construction elements are produced in a 1:1 ratio for testing strew insulation and clay plaster mounting. Concerning the use of straw bales it is to say, that cost savings in raw materials are compensated by higher labor costs, which is not advantageous from the economical perspective. In the ongoing project the use of short cut strew instead of bales of straw is being investigated. Test elements are used to test the compression and fire resistance of the materials. For mounting of clay plaster there is a state of the art technology available, but there has to be an efficient drying process within an industrial production environment developed.
Project partners
Project management
MBA Herbert Kirl
LOPAS AG
Contact address
LOPAS AG
Oberwaltersdorfer Straße 2c
A 2523 Tattendorf
Tel.: +43 (2253) 81031
Fax: +43 (2253) 81031 - 18
E-Mail: herbert.kirl@lopas.ag
