Anhydrite/aerogel composites for thermal insulation

Sanz Pont, Daniel; Sanz Arauz, Fco David; Bedoya Frutos, Cesar; Flatt, Robert J. y López Andrés, Sol (2015). Anhydrite/aerogel composites for thermal insulation. "Materials and Structures", v. 49 (n. 9); pp. 3647-3661. ISSN 1359-5997. https://doi.org/10.1617/s11527-015-0746-8.

Descripción

Título: Anhydrite/aerogel composites for thermal insulation
Autor/es:
  • Sanz Pont, Daniel
  • Sanz Arauz, Fco David
  • Bedoya Frutos, Cesar
  • Flatt, Robert J.
  • López Andrés, Sol
Tipo de Documento: Artículo
Título de Revista/Publicación: Materials and Structures
Fecha: 2015
Volumen: 49
Materias:
Escuela: E.T.S. Arquitectura (UPM)
Departamento: Otro
Licencias Creative Commons: Reconocimiento - Sin obra derivada - No comercial

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Resumen

High performance thermal insulating composite materials can be produced with mineral binders and hydrophobic aerogel particles through a hydrophilization process for the latter with surfactants. The present study is focused on the development of aerogel/calcium sulfate composites by the hydrophilization of hydrophobic silica aerogel particles through a polymer-based surfactant. Its effects on the microstructure and hydration degree are examined as well as their relation to the resulting mechanical and physical properties. Results show that composites with an around 60 % of aerogel by volume can achieve a thermal conductivity <30 mW/m × K. Interestingly, a surfactant addition of 0.1 % by wt% of the water in the mixtures provides better material properties compared to a surfactant wt% addition of 5 %. However, it has been found around 40 % entrained air, affecting the material properties by reducing the binder and aerogel volume fractions within the composites. Moreover, gypsum crystallization starts to be inhibited at aerogel volume fractions >35 %. Towards material optimization, a model for the calculation of thermal conductivity of composites and an equation for the compressive strength are proposed.

Más información

ID de Registro: 41140
Identificador DC: http://oa.upm.es/41140/
Identificador OAI: oai:oa.upm.es:41140
Identificador DOI: 10.1617/s11527-015-0746-8
URL Oficial: http://link.springer.com/article/10.1617/s11527-015-0746-8
Depositado por: Memoria Investigacion
Depositado el: 23 Jun 2016 11:08
Ultima Modificación: 01 Nov 2016 23:30
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