Study on Properties of Ultra-Light Thermal Insulation Foamed Cement-Based Composites

In this paper, ordinary portland cement, aerogel powder, graphite modified polystyrene (EPS) particles, foaming agent and additives were used to successfully prepare ultra-light insulation foamed cement-based composite with dry density of 120 kg/m3. The effects of graphite modified EPS particles on its density, mechanical properties and thermal conductivity were studied. The research results show that: When adding graphite modified EPS particles with volume content of 30%, the foam concrete has the best performance, with compressive strength of 0.25 MPa and thermal conductivity of 0.0326 W/(mK); It shows that the compressive strength can be maximized and the thermal conductivity can be minimized when the filling amount of graphite modified EPS particles and the pore structure of foamed cement-based materials reach the best composite ratio.