Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
673383 | Thermochimica Acta | 2014 | 10 Pages |
Abstract
In the present study, a new analysis method is proposed to measure thermal conductivity, thermal diffusivity, volumetric specific heat capacity, and specific heat capacity of cement-based materials based on the guarded heat flow meter apparatus. We tested hydrated cement paste specimens with 0.4 water-to-cement ratio and applied both steady and non-steady state data to compute thermal properties of the hydrated cement paste. Thermal conductivity and thermal contact resistance were determined as 1.28Â WÂ mâ1Â Kâ1 and 0.038Â mâ2Â KÂ Wâ1 using steady state data. Furthermore, using a computerized system of heat flow meters and non-linear regression, we used non-steady state data to measure thermal diffusivity, volumetric specific heat capacity and specific heat capacity of the hydrated cement paste as 4.77Â ÃÂ 10â7Â m2Â sâ1, 2685.4Â kJÂ mâ3Â Kâ1, and 1.28Â kJÂ kgâ1Â Kâ1. The relative uncertainties of these properties fell within 2-7% range and the residual distributions were validated to follow a normal distribution based on quantile-quantile tests.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Fluid Flow and Transfer Processes
Authors
Seyoon Yoon, Donald E. Macphee, Mohammed S. Imbabi,