Novel Dual Walling Cob Building: Dynamic Thermal Performance

This paper emphasizes the experimental and numerical study of new cob mixes used for insulation load bearing wall elements. The provides complete datasets thermal properties walling materials, using with density ranging from 1107 kg/m3 to 1583 structural walls less than 700 kg m−3 walls. Various French soils fibres (reed, wheat straw, hemp shiv, flax straw) different water contents are studied. lowest average conductivity is obtained mix prepared 5% straw 31% content. mix, 25% reed content, has conductivity. Investigation diffusivity, density, heat capacity shows that, when lower 0.4 W m−1 K−1, decrease in leads better values higher capacity. Little variation noticed regarding K−1. Furthermore, non-uniformity local losses through samples due mainly non-uniform distribution inside inducing an increase loss up 50% Cob a comparative simulation case typical house under UK climatic conditions. energy performance conventional building compared dual walled building, showing remarkable reduction consumption as walls, whilst maintaining comfortable indoor conditions without additional heating.