This work aimed to measure the thermal conductivity of some natural plaster materials that could be used for straw bale buildings. Thermal conductivity is very important to determine the insulation value and other thermal parameters for natural plaster materials. Plaster materials consisted of soil, sand and straw. Straw is used as a reinforcement ﬁbre for plaster. Three types of ﬁbres were used such as wheat straw, barley straw and wood shavings. The results indicated that the thermal conductivity of all materials decreased with increasing straw ﬁbre content and decreased with increasing sand content. The straw ﬁbres have a greater effect on the change of thermal conductivity than the effect of sand. The results also revealed that plaster reinforced by barley straw ﬁbres has the highest values of thermal insulation.
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Authors: Ashour, Taha; Wieland, Hansjörg; Georg, Heiko; Bockisch, Franz-Josef; Wu, Wei