Foam Glass for Construction Materials: Foaming Mechanism and Thermal Conductivity

Bidragets oversatte titel: Skumglas som konstruktionsmateriale: Opskumningsmekanisme og termisk ledningsevene

Publikation: Bog/antologi/afhandling/rapportPh.d.-afhandlingForskning

Abstrakt

Foaming is commonly achieved by adding foaming agents such as metal oxides or metal carbonates to glass powder. At elevated temperature, the glass melt becomes viscous and the foaming agents decompose or react to form gas, causing a foamy glass melt. Subsequent cooling to room temperature, result in a solid foam glass.

The foam glass industry employs a range of different melt precursors and foaming agents. Recycle glass is key melt precursors. Many parameters influence the foaming process and optimising the foaming conditions is very time consuming. The most challenging and attractive goal is to make low density foam glass for thermal insulation applications.

In this thesis, it is argued that the use of metal carbonates as foaming agents is not suitable for low density foam glass. A reaction mechanism is proposed to justify this result. Furthermore, an in situ method is developed to optimise the foaming process for foam glass with closed pores. In addition, it is shown that melt foaming should preferably be performed in a viscosity limited regime. Finally, it is suggested that the foaming agent contributes significantly to the solid conductivity of foam glass.
Bidragets oversatte titelSkumglas som konstruktionsmateriale: Opskumningsmekanisme og termisk ledningsevene
OriginalsprogEngelsk
Antal sider86
StatusUdgivet - 2016
NavnPh.d.-serien for Det Teknisk-Naturvidenskabelige Fakultet, Aalborg Universitet
ISSN2246-1248

Bibliografisk note

Afhandling ikke publiceret.

Citationsformater

Petersen, R. R. (2016). Foam Glass for Construction Materials: Foaming Mechanism and Thermal Conductivity. Ph.d.-serien for Det Teknisk-Naturvidenskabelige Fakultet, Aalborg Universitet