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Abstract:	Um die Marktanforderung nach immer besserer Dämmleistung der Gebäudehülle zu erfüllen, wurden hocheffiziente Dämmmaterialien, auch bekannt unter dem Namen Superisolationsmaterial (Super Insulation Materials), entwickelt. Das sind Materialien mit einer bis zu 10-mal geringeren Wärmeleitfähigkeit von herkömmlichen Dämmstoffen. Allerdings sind diese Materialien teuer und ihre Lebensdauer bei wechselnden hygrothermischen Einflüssen noch nicht hinreichend untersucht, was bereits im internationalen Forschungsprojekt Annex 65 der Internationalen Energieagentur (IEA) beschrieben wurde. Der Hydrophobierungsprozess an synthetischem amorphen Siliziumdioxid SAS ist jedoch seit Langem bekannt und wird zur Hydrophobierung von Pulvern in verschiedenen Industrieanwendungen eingesetzt. Deshalb war der erste Schritt in der vorliegenden Studie die Langzeitstabilität von hydrophoben Pulvern zu evaluieren, um dann die Langzeitstabilität entsprechend hydrophobierter Formkörper zu untersuchen und zu bewerten. Investigation on for the long-term performance of hydrophobic silica-based advanced porous materials in building applications To satisfy the new demand of more and more efficient thermal insulation for building envelope highly efficient insulation materials, known as super insulation materials (SIM), have been developed, with a thermal conductivity up to 10 times lower than common thermal insulation products. However, although they offer excellent insulation performance, these materials are expensive and there is a lack of information on their durability under different hygrothermal conditions, which is described and examined in general in IEA Annex 65. The hydrophobation of synthetic amorphous silica (SAS) is long been known and is applied to powder for several technical applications. Therefore, the first step of the presented study was to show the long-term stability of hydrophobic powders to investigate and evaluate afterwards the long-term stability of the hydrophobized mold bodies.
Source:	Bauphysik 42 (2020), No. 1
Page/s:	27-33
Language of Publication:	German

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