This study aims to provide a thermophysical characterization of a new economical and green mortar. This material is characterized by partially replacing the cement with recycled soda lime glass. The cement was partially substituted (10, 20, 30, 40, 50 and 60% in weight) by glass powder with a water/cement ratio of 0.4. The glass powder and four of the seven samples were analyzed using a scanning electron microscope (SEM). The thermophysical properties, such as thermal conductivity and volumetric specific heat, were experimentally measured in both dry and wet (water saturated) states. These properties were determined as a function of the glass powder percentage by using a CT-Meter at different temperatures (20 °C, 30 °C, 40 °C and 50 °C) in a temperature-controlled box. The results show that the thermophysical parameters decreased linearly when 60% glass powder was added to cement mortar: 37% for thermal conductivity, 18% for volumetric specific heat and 22% for thermal diffusivity. The density of the mortar also decreased by about 11% in dry state and 5% in wet state. The use of waste glass powder as a cement replacement affects the thermophysical properties of cement mortar due to its porosity as compared with the control mortar. The results indicate that thermal conductivity and volumetric specific heat increases with temperature increase and/or the substitution rate decrease. Therefore, the addition of waste glass powder can significantly affect the thermophysical properties of ordinary cement mortar.
The purpose of this work is to study the influence of the percentage of porosity, that is to say the volume of air compared to total volume on the thermal conductivity of clay at different degrees of temperature, this study is very interesting because clay is used in several fields for example construction, pottery, etc, and also in certain regions of the world as a building material and especially in countries which at a higher temperature, for this we perform together experiments on a mass of clay with a cubic shape of dimensions (10cm * 10cm * 10cm), but with each experiment we varied the percentage of porosity, then we relied on the CT-METRE device to measure the thermal conductivity
The objective of this work is the development of a composite material of clay doped with copper powder and with thermal properties likely to give it a great importance in the ceramic industry, has been the subject of increased attention in recent decades because of their multiple uses as thermal insulators in the fields of ceramics and heterogeneous catalysis. Indeed, this study is based on a global approach of the properties of the material, accompanied by a thorough analysis of the thermophysical characteristics. The thermal conductivity of this material was determined as a function of copper content and temperature. Experiments have shown that thermal conductivity increases with the copper content and decreases with temperature, the experience made by an apparatus called CT-METRE. A theoretical model of the composite material allowing to approach more finely the heat transfers and also to validate the experimental results obtained
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