New Thermal Insulating Material Based on Geocement

Abstract:

A new thermal insulating material was developed on the basis of a geocement, formulated as Na₂OAl₂O₃6SiO₂20H₂O. Ground limestone and aluminosilicate pellets were used as fillers for its production (composition: geocement 64.29 wt. [%]; fillers 35.71 wt. [%]). This material, which is applied having a thickness of 3.0-4.5 mm, swells when it is exposed to an external heat flow of 1273 K average temperature. Swelling is due to the matrix phases and filler dehydration, which include heulandite, ussingite, sodium zeolite and other phases. As a result, a finely porous glassy aluminosilicate frame of jadeite-albite composition is formed, which is characterized by low thermal conductivity (0.09-0.175 Wm^-1K^-1). The developed material can be used to protect and to insulate wooden, metal and concrete surfaces from an one-sided heat source. The paper is dedicated to the great scientist of the XXI century in the field of alkali-activated cements and materials based on them, Pavlo Kryvenko, in honor of his 75^th birthday anniversary.

• Periodical: Advanced Materials Research (Volumes 838-841)
• Pages: 183-187
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.838-841.183
• Online since: November 2013
• Authors: Vít Petranek*, Sergii Guzii, Pavlo V. Kryvenko, Konstantinos Sotiriadis, Anastasiia Kravchenko
• Keywords: Filler, Geocement, New Thermal Insulating Materials, Thermal Conductivity (TC)

References

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