In the autoclaved aerated concrete production, aluminum powder is used to create pores which lead to
high thermal insulation property. In the present technique developed, snow or crushed ice is added to
fly ash over optimum moisture content and compacted to obtain an increased porosity and a stronger
matrix. The main objective of this study is to investigate the effect of various practical mix percentages
of snow into fly ash and evaluation of their insulation properties. The optimum water content of fly ash
was determined and additional snow with percentages of 10, 20 and 30 by weight are added to type
C fly ash samples. Thermal conductivity tests were performed on samples to evaluate the insulation
capability of the snow added fly ash samples where information is not readily available in the literature.
The highest improvement in the thermal conductivity is obtained by adding 20 per cent snow to fly ash
samples over optimum moisture content. Higher percentages of snow addition resulted in interconnected
voids, causing lower thermal conductivity performance. These findings can be utilized for nonstructural
insulating construction blocks and also as an insulation layer for embankments in permafrost areas.