Category: Guarded Heat Flow Meter
Author(s): Donald E. Macphee, Mohammed S. Imbabi, Seyoon Yoon
Keywords: Cement, concrete, Contact resistance, GHF, Guarded Heat Flow meter Method, specific heat capacity, Steady state, Thermal Conductivity, Thermal Diffusivity, Transient
Abstract: A new analysis method based on the guarded heat flow meter apparatus is proposed to measure the thermal properties of cement-based pastes in a hydrated form. In a steady state, a specimen with 0.4 water-to-cement ratio was found to have a thermal conductivity and a thermal contact resistance of 1.28Wm−1 K−1 and 0.038 m−2 KW−1. A computerized system of heat flow meters provided non-steady data which made transient methods possible. These methods were then used to find additional thermal properties. All measurements had uncertainties within a range of 2–7%.
Reference: June 2014 Thermochimica Acta 588
DOI: 10.1016/j.tca.2014.04.015