The incorporation of phase change materials (PCMs) into concrete bridge decks shows promise as a method of decreasing freeze/thaw cycling in bridge decks. The authors have conducted a study to determine the best carrier to be used for the incorporation of PCMs into concrete, as well as the effects of the incorporation of the carriers and PCMs on strength and thermal properties of mortars. Four different PCMs (PCM6, PT4, ...
The thermal conductivity of a mineral cast material made of epoxy-granite was determined by a steady state method, as well as by the transient plane source (TPS) method. In comparing both methods to geometric models, it was determined that both methods were able to accurately measure the thermal conductivity of the two-phase material. The material that was tested was intended to be used in machine tools, and so its thermal ...
Composite spray coatings containing Al2O3 and AlN were prepared and their tensile bonding strength, microhardness, corrosion behavior and thermal conductivity were compared to those of pure Al2O3. The goal of this study was to identify a spray coating with an improved thermal conductivity over that of Al2O3 for use in coating heat exchangers, furnace walls, heat pipes, etc. The coatings that were prepared had AlN : a-Al2O3 ...
The effective thermal conductivity and thermal diffusivity were investigated for polyaniline (PANI) composites containing iron and manganese at varying temperatures. Composites were prepared containing 100% Fe, 50% Fe and 50% Mn, and 100% Mn. It was determined that both the effective thermal conductivity and effective thermal diffusivity increased with increasing iron content. The authors attribute this increase to the increase in crosslinking density between the nitrogen in PANI and Fe....
A rigid, self-supporting material derived from flax tow was prepared and its mechanical, thermal, hydrous, and acoustic properties were investigated. The study was performed to determine if this material would be a viable option for use as a biodegradable thermal and acoustic insulation in walls. The effect of flax-tow size after grinding on these properties was also investigated. It was determined that increasing the flax-tow size resulted in a reduction ...
