The aim of the research is to study thermal conductivity and some physical and mechanical properties of hybrid composites which consist of (cement mortar and sawdust) to use these materials in thermal insulation according to the parts of the building and economic standards. The use of materials such as ordinary Portland cement, natural sand and sawdust "jawy", and water is a common and tradition for construction applications in Iraq. However, the hybrid composites materials are still rare employment. For the preparation of thermal conductivity samples compressive strength adopted the standard specifications of America. The thermal behavior of materials used such as cement is of great relevance in the application and use of the buildings as insulation for walls, and other structures. The high specific heat value is desirable due to the ability of cement associated to retain heat where this act is changing up content of sawdust used because of its qualities insulation. Also, the devaluation of the thermal conductivity is desirable in order to provide thermal insulation is required. The complexes cured in water for (1-28 days), the resistors value mechanical increased directly proportional to the increase sawdust content, which leads to an improvement in mechanical properties and a decrease in density and thermal conductivity, which makes high thermal insulation complexes concrete, and that achieves the objective of this research.

The aim of the research is to study thermal conductivity and some physical and mechanical properties of hybrid composites which consist of (cement mortar and sawdust) to use these materials in thermal insulation according to the parts of the building and economic standards. The use of materials such...