Expanded polystyrene concrete has been being studied and widely applied in current construction projects withthe advantages of reducing the weight for the structures while increasing the sound- and thermal- insulation ca-pability to increase energy efficiency for buildings. This paper presents some preliminary experimental resultson the use of recycled EPS in producing lightweight concrete. The use of recycled Expanded polystyrene (rEPS)can make lightweight concrete with a density and compressive strength ranging from 1000 to 1500 kg/m3, and5,0 to 15 MPa, respectively. The total 08 mixtures with water to binder ratios of 0,25 and 0,30 were studied, inwhich the EPS contents of 25%, 30%, 40% and 50% by volume of concrete were applied. The research resultsshow that the density decreases when the EPS content increases. However, capillary water absorption and com-pressive strength of concrete tend to be decreased for both water to binder ratios. The results of evaluating thethermal conductivity of concrete according to the experimental formula of ACI213 R14 show that the thermalconductivity of concrete decreases with increasing the EPS content.