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Thermal conductivity measurements of road construction materials in frozen and unfrozen state

Kömle, Norbert and Bing, H. and Feng, W.J. and Wawrzaszek, Roman and Hütter, E. and He, P. and Marczewski, W. and Dabrowski, B. and Schröer, K. and Spohn, Tilman (2007) Thermal conductivity measurements of road construction materials in frozen and unfrozen state. Acta Geotechnica, 2, pp. 127-138. Springer. ISSN 1861-1125

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Abstract

A series of thermal conductivity measurements for various materials was performed in a large climate chamber. The size of the chamber allowed the preparation of relatively large samples in a controlled thermal environment. Three types of thermal sensors were used: (1) two needle probes; (2) a grid of temperature sensors, evenly distributed inside the sample; (3) two additional thermal probes, which were simplified versions of an instrument originally developed for measuring thermal properties of the ice/dust mixture expected to exist at the surface of a comet nucleus. They consist of a series of individual temperature sensors integrated into a glass fibre rod. Each of these sensors can be operated in an active (heated) or passive (only temperature sensing) mode. The following sample materials were used: fine-grained reddish sand, coarse-grained moist sand, gravels with various grain size distributions from < 1 cm up to about 6 cm, and for comparison and calibration pure water (with convection suppressed by adding agar-agar), compact ice, and compact granite. Of particular interest are the measurements with composite samples, like stones embedded in an agar-agar matrix. We describe the evaluation methods and present the results of the thermal conductivity measurements.

Item URL in elib:https://elib.dlr.de/98233/
Document Type:Article
Title:Thermal conductivity measurements of road construction materials in frozen and unfrozen state
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Kömle, NorbertInstitut für Weltraumforschung, Österreichische Akademie der Wissenschaften, Graz, AustriaUNSPECIFIED
Bing, H.Cold and Arid Regions Environmental and Engineering Research Institute (CAREERI), Chinese Academy of Sciences, Lanzhou, ChinaUNSPECIFIED
Feng, W.J.Cold and Arid Regions Environmental and Engineering Research Institute (CAREERI), Chinese Academy of Sciences, Lanzhou, ChinaUNSPECIFIED
Wawrzaszek, RomanSpace Research Centre, Polish Academy of Sciences, Warsaw, PolandUNSPECIFIED
Hütter, E.Institut für Weltraumforschung, Graz, Österreichische Akademie der Wissenschaften, AustriaUNSPECIFIED
He, P.Cold and Arid Regions Environmental and Engineering Research Institute (CAREERI), Chinese Academy of Sciences, Lanzhou, ChinaUNSPECIFIED
Marczewski, W.Space Research Centre (SRC), Polish Academy of Sciences, Warsaw, PolandUNSPECIFIED
Dabrowski, B.Space Research Centre (SRC), Polish Academy of Sciences, Warsaw, PolandUNSPECIFIED
Schröer, K.Institut für Planetologie, Universität Münster, MünsterUNSPECIFIED
Spohn, TilmanTilman.Spohn (at) dlr.deUNSPECIFIED
Date:2007
Journal or Publication Title:Acta Geotechnica
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:2
Page Range:pp. 127-138
Publisher:Springer
ISSN:1861-1125
Status:Published
Keywords:Wärmeleitfähigkeit, Sand, Schotter, Permafrost
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Science and Exploration
DLR - Research area:Raumfahrt
DLR - Program:R EW - Erforschung des Weltraums
DLR - Research theme (Project):R - Projekt ROSETTA Instrumente
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research
Deposited By: Spohn, Tilman
Deposited On:13 Oct 2015 08:03
Last Modified:31 Jul 2019 19:55

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