Thermal properties of cement based composites with municipal solid waste incinerator fly ash accessed by two different transient methods

Abstract

Thermal properties of cement composite with Mixed Fly Ash (MFA) from different parts of Municipal Solid Waste Incineration (MSWI) process as a partial replacement of Portland cement are researched in the paper. MFA is applied in the amount of 10%, 20% and 30% of the mass of cement, while sand and water quantities are kept constant. For the sake of comparison, a reference mixture with Portland cement as the only binder is studied as well. For the characterization of studied materials, their basic physical properties as bulk density, matrix density and total open porosity are measured using gravimetric method combined with helium pycnometry. Among the thermal properties, thermal conductivity, thermal diffusivity and specific heat capacity are accessed by two transient methods having different experimental arrangement and time of measurement. The measured data obtained by the particular methods are compared and the applicability of the methods for the measurement of thermal properties of solid building materials is discussed.