Perlite was added to mortar in order to determine if the resulting composite was more thermally insulating than conventional shotcrete. This study was conducted to determine if shotcrete in which sand has been replaced by perlite can potentially be used as thermal insulation for underground mines. It was found that the addition of perlite decreased the weight of the shotcrete, as well as the thermal conductivity and diffusivity, but decreased ...
Inorganic polymers (geopolymers) with varying chemical compositions were subjected to a number of tests in an effort to demonstrate that varying their chemical composition, as well as curing conditions can allow researchers to create geopolymers that fit specific applications based on their microstructure, thermal conductivity, mechanical strength and reliability, and thermal shrinkage behavior....
The purpose of this study was to fabricate and analyze the physical properties of polyacrylate–gold nanocomposites (PGNs) with gold nanoparticles (GNPs) as their nucleation agents. The transient plane source (TPS) method was used to measure the thermal properties of the polyacrylate–gold nanocomposite foams (FPGNs) and PGNs. Results showed that the addition of GNPs improved thermal conductivity of the PGN materials, but as the size of GNPs increased, the ...
The authors prepare two series of wood sand concretes by using two types of sand concretes (dune and river) and variable amounts of wood shavings in the mixture. The mechanical and thermal properties of the concretes were then studied, using the transient plane source (TPS) technique. The addition of wood shavings to the sand concrete mix improved the strength of the concretes, and didn't have much of an effect on ...
A one step polymer-incorporation sol-gel process coupled with a surface modification and ambient pressure drying process was developed to synthesize silica-poly(vinylpyrrolidone) composites aerogels. The properties that were investigated were: hydrophobicity, mechanical strength and thermal conductivity at high temperatures. The authors envisioned the use of these polymer composites in energy saving areas with large scale production....
