I am investigating passive design by study how impact of house envelop on using less energy in heating as it is the most energy consumption for occupant in Victoria, Australia.
As conventional and currently house, external wall was made by solid brick, concrete wall and concrete block whereas some studies about the insulation and thermal mass in hot and humid climate indicated the benefit of external insulation.
Therefore, I would like to look up some studies about external wall by combination of these material such as hollow brick, thatch brick (clay/concrete mix with thatch) or bubble brick (e.g clay/ concrete mix with plastic bubble). How could it be mixed and used? if yes, how is it different from the conventional material?
Thermal performance of any brick material depends mainly upon it's thermal properties like thermal conductivity, specific heat capacity and thermal diffusivity. these properties vary material to material. and coming to difference between solid and hollow bricks...hollow bricks offer more thermal resistance to heat flow as the air space act as the resistance to flow. and hollow bricks are not only energy efficient but they also sound resistant. your combination (mixing) of materials definitely change thermal properties of the materials therefore thermal performance will also be changed.
Using Thatch brick (adobe) for external walls in Ghana has been found to keep rooms cool during the warm seasons. I guess the conductivity of this kind of brick is low and hence it is either able to retain heat or release heat slowly.
Dear Tan,
In attachment I suggest some papers that shows how to improve the thermal performance of hollow clay bricks.
Article Experimental and numerical investigation of a hollow brick f...
Article Thermal analysis of the application of PCM and low emissivit...
Conference Paper Thermal effectiveness of low emissivity coatings in hollow b...
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