studied the effect of expanded perlite
aggregate on the properties of lightweight concrete; they proved that increased use of expanded perlite
aggregate resulted in less strength and less weight in the concrete, while at the same time, thermal conductivity was substantially improved.
Ramazan Demirboga and Rustem Gul in 2002  had reported that thermal conductivity of concrete made up of expanded perlite
and pumice aggregates with replacement of cement with fly ash and silica fumes with 10%, 20%, and 30% by weight gives good results for thermal conductivity of concrete.
Perlite aggregate consists of expanded perlite
, sized for use in lightweight fire retardant (resistant up to four hours) insulating concrete, replacing sand or gravel.
such inorganic aggregates as expanded perlite
(Sari, Karaipeikli 2008; Topcu, Isikdag 2008), vermiculite (Koksal et al.
Saudi Perlite lndustries, a pioneer in the field of thermal and cryogenic insulation, manufactures expanded perlite
at one of the biggest facilities of its kind in the region.
The aim of this study is to use expanded perlite
as a raw material in slipcasting bodies with low density.
Beglaryan said that the packs of expanded perlite
belong to such technologies.
These account for the excellent insulating properties and light weight of the expanded perlite
. Being highly porous and chemically inert media, perlite granules can act as a good adsorbent.
Some specific topics include modernization of the production of high-purity quartz groats from natural quartz, auto-ignition temperature data for selected ketones, and thermal treatment of new inorganic thermal insulation board based on expanded perlite
. Volume 2 compiles papers in sections on nanomaterials, materials science, metal, and applications of modeling.
* Expanded perlite
is extensively used in construction and other industries due to its low apparent weight as well as low heat coefficient and high sound absorption.
The filler includes a mixture of unexpanded and expanded ash and expanded perlite
. Candidate polymers include polyamides, polyimides, polyurethanes, polyolefins, polystyrenes, polyesters, polycarbonates, polyketones, polyureas, polyvinyl resins, and acrylics.
Air cells within the expanded perlite
provide its insulating efficiency.