# Numerical and Experimental Approaches to Study the Effect of Humidity and Cement Content on the Thermal Conductivity of Compressed Earth Block

### Abstract

The determination of the thermal conductivity of a natural soil plays an important role when considering its suitability for energy saving insulation. It is known that soil is the most common building material with a low thermal conductivity. It is important to measure the local thermal conductivity in such materials when they are subjected to ambient temperature and humidity .The objective of our work is to determine the thermal conductivity of the material of compressed earth blocks stabilized by cement (CEBs) at ambient temperature. To do so we measured experimentally and numerically the temperature with time using the transfer heat into compressed earth block (CEBs). The established numerical model is based on the finite volume method. The obtained algebraic systems are solved using the double scanning mesh method. The experimental measurement used to determine the thermal conductivity is called 'hot rings method'. The results show that there is more than one factor to increase the thermal conductivity of the material at ambient temperature. This means that the material is not dry. One can also note when adding cement it increases the thermal conductivity because it is a good conductor of temperature.

**ICTEA: International Conference on Thermal Engineering**, [S.l.], v. 2017, mar. 2017. Available at: <http://journals.library.ryerson.ca/ictea/article/view/26>. Date accessed: 20 feb. 2018.