Permafrost

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Soil Insulation by STYROFOAM Extruded Polystyrene Foam
Simon Wang 1 , Osamu Sano 2
(1. Dow Chemical (China) Investment Company Limited, 2.Dow Chemical Pacific Limited)
Abstract: After invented by Dow Chemical Company about 60 years ago, STYROFOAM TM
extruded polystyrene foam board has, because of its excellent mechanical strength, high
resistance to water and water vapor, long-term high thermal resistance, been widely used for
insulating various construction facilities in the seasonally freezing regions, sometimes in the
permafrost regions as well.
This paper introduces some of the typical insulation applications and a basic insulation
procedure of pavement roads.
Trademark of The Dow Chemical Company ("Dow") or an affiliated company of Dow
keywords: freezing, soil, pavement, road, insulation, XPS
Spatial-Temporary Changing of Electric Resistance in Period of
Freezing and Thawing
T.Vanchig, P.Ganbold, D.Battogtokh, A.Dashtseren
(Institute of Geography, Mongolian Academy of Sciences, nuganer@yahoo.com)
Abstract: The laboratory of Permafrost the Institute of Geography, Mongolian Academy of
Sciences has executed several dynamic research study of the seasonal and long standing
permafrost rocks and in 2005-2006 is implementing the serial work named as “Study of
temperature regime of the seasonal freezing and thawing”. In today’s condition of market
economy have expended a lot of running costs to equip and drilling bore holes for studying of
temperature regime, to set an measuring equipment up ready for use.
So, in purpose to provide the no drilling technology were used tools AE-72 for
geo-physical prospecting and in assistance of firstly repeated methodology of micro-electric
regional measurement has economized great financial expenditure, labor and materials that
began to give its efficiency.
The first measurements in study of regime for the personal electric resistance were made
along the central road in the East-South of Ulaanbaatar city located in 45 km, in Bus lake on
territory of Coal mining of Nalaikh district with 15-40 m thick permafrost. The muddy water of
this lake has treatment significance so the people amenable to diseases use it as spring of
mineral water that was protected in its wind character. But in last years in using water of this
lake was disturbed the ecological balance and most of the natural difficulties is occupied the
seasonal thawing.
Under the negative influence of Human activity the water of lake is contaminated and due
to climatic warming water is drying up, its hump is thawing that forms collapse and as a result
of this action has begun to dominate the permafrost disturbing.
Here were determined the spatial-temporary changing of the permafrost disturbing in Bus