Production of Thermal Insulation Lightweight Concrete Using Manufactured Aggregate

Abstract

This work aimed to produce lightweight concrete characterized with thermal insulation for using to develope lightweight aggregate (LWAC) from local material. Kaolin clay and a glass powder were mixed with ratio equal (20, 80%) respectively to produce the (LWA). The composite of the material was prepared and burned in a kiln up to (700 ℃) to manufacture the (LWA). The density of the aggregate was ranged of (559-588) kg/m3. The mechanical properties and thermal conductivity were investigated by using cube specimens of (100*100*100) mm at different ages. The 28 days compressive strength of the produced lightweight concrete (LWAC) was (8.6 -30.6) MPa for the density of (1090-1880) kg/m3. Besides , the value of the thermal conductivity of this type of concrete was between (0.4947- 0.8872) W⁄m. K. The results showed a promise lightweight concrete with a good thermal insulation properties