For each mixture, three samples of 110mm×160mm×40 mm prisms and 50 mm cube were prepared and stored in lime saturated water at °C until the time of the testing. The specimens were dried at the age of 28 days in an oven at °C and weighed at 24 h intervals until the loss in weight did not exceed 1% in a 24 h (ASTM C 332) for thermal conductivity. The specimens’ surfaces were sandpapered before measuring their thermal conductivities. Cube specimens were tested for compressive strength in accordance with ASTM C 109.