Measurement of the Thermal Conductivities of Clay Materials Stabilized by a Mixed Binder
Abakar Ali
Ecole Nationale Supérieure des Travaux Publics (ENSTP), BP 60, N'Djamena, Chad.
Abdallah Dadi Mahamat *
Institut Nationale Supérieure des Sciences et Techniques d'Abéché (INSTA), BP 130 Abéché, Chad.
Abdallah Ban-Nah
Institut Nationale Supérieure des Sciences et Techniques d'Abéché (INSTA), BP 130 Abéché, Chad.
André Donnot
Université de Lorraine, Laboratoire d'Etudes et de Recherches sur les Matériaux Bois (LERMAB), 54500 Vandoeuvre-lès-Nancy, France.
Malloum Soultan
Faculté des sciences Exacts Université de N'Djamena, Chad.
*Author to whom correspondence should be addressed.
Abstract
This research work concerns the physical characterizations and the measurement of the thermal conductivities of clay materials stabilized by a mixed binder. At first, the different physical characterizations are carried out for the classification of the study material. Then, cylindrical specimens 7 cm in diameter by 7 cm in height are made with clay alone, specimens stabilized with 5% Gum Arabic, specimens stabilized with 5% cement, and also specimens stabilized with 5% cement and 5% Gum Arabic and finally specimens stabilized with the various binders mentioned above and reinforced with rice straw at a rate of 1%. The results show that the thermal conductivity value of 0.73 W/mK is for the 100% A formulation, the small thermal conductivity values are obtained for the formulations 94%A+5%GA+1%P and 94%A+5%C+1%P. which are respectively 0.60 W/mK and 0.59 W/mK and finally, the high value of the thermal conductivity is 0.90 W/mK for the formulation 90% A+5% GA+5% C.
Keywords: Clay material, stabilization, reinforcement, cement, Gum Arabic, rice straw