Thermal Conductivity Study of Geopolymer Material as a Heat Insulating Material for Thermal Storage

Abstract

Thermal building insulation is one of the most crucial factors in obtaining
perfect thermal storage architecture and becoming the best thermal
storage. The primary goals of this study were to explore the materials
used in thermal storage structures composed of geopolymer material in
a way of identifying its elemental composition, measuring its density, as
well as to analyze its thermal properties, particularly its thermal
conductivities. There were two parameters in this study which are the
type of raw samples and the weight of sample mixtures. Firstly, the
pellets' diameter and thickness were measured first after the sample was
turned into pallet form. Then, the SEM-EDX analysis was used to examine
the sample's characteristics and the morphology of the sample was
determined. Later the density of the sample was measured as it
influences the sample’s ability to conduct heat. For the density
measurement, the 2g mixture sample has the lowest density at 0.001752
Kg/m³. Raw limestone has the highest density at 0.001826 Kg/m³,
followed by coconut peat ash and kaolin. Finally, the thermal conductivity
occurred for each sample using data obtained. Based on the analysis, 6g
sample mixture has the lowest thermal conductivity of 1.3117 (W/m℃),
while for raw samples, kaolin is the lowest thermal conductivity with a
value of 1.4320 (W/m℃).