Hochwirksame Wärmedämmstoffe, die sich frei formen und bearbeiten lassen

Thermal insulation of buildings has made an important contribution to the saving of energy and therefore to the conservation of energy-resources. There is a great demand for free formable efficient high performance thermal insulation materials. In addition to conventional thermal insulation (e.g. PU foam), vacuum insulation panels (VIP) and aerogel products establish their position in the market. In this study limits of performance for an alternative efficient thermal insulation based on hollow evacuated aggregates are examined theoretical (numerical simulation and calculation) and practical (different binding agents with various model bodies). Practical investigations show that PU foam is generally qualified as binding agent for low density spherical aggregates with different sizes while gypsum, lime and cement are not suitable. Results of the simulation indicate that thermal insulation based on hollow spheres (Ø 10 mm) with high vacuum and thin glass shells (0.0001 mm) can reach a thermal conductivity of 0.01 W/(m•K). These values are in the range of recent aerogel products which already offer a suitable workability. Therefore, a market for a free formable plaster based on evacuated spheres is actually non-existent.

Stichworte

• Wärmedämmstoff

Publikationen

• , Hrsg.: Osterhus, L.; Schmidt-Döhl, F.: Thermal Insulation Based on Evacuated Aggregates - Limits of Performance. In: V. Mechtcherine, C. Schroefl (eds.), Application of Superabsorbent Polymers and Other New Admixtures in Concrete Construction, RILEM Proceedings PRO95, RILEM Publications S.A.R.L., Bagneux/France, 2014, p. 325-334, ISBN: 978-2-35158-147-6, Proceedings of the International Conference on Application of superabsorbent Polymers and other new admixtures in concrete construction. 14.-17. September 2014, Dresden, 2014.peer rewied.
• Bahnsen, B.: Untersuchung unterschiedlicher geometrischer Körper für den Einsatz als Komponente in frei verformbaren Wärmedämmstoffen. 2013.
• Pauli, K.: Verwendung von Aerogel im Bauwesen. 2013.
• Irmler, S.: Zusammenstellung von Grundlagen zur Ökobilanzierung von Wärmedämmstoffen. 2013.