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  • Books  (157)
  • 1995-1999  (7)
  • 1975-1979  (150)
  • AWI Archive  (157)
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  • 1
    Call number: ZSP-202-338
    In: Detecting structural heat losses with mobile infrared thermography / R.H. Munis, S.J. Marshall and M.A. Bush, Part II
    In: Research report / Cold Regions Research and Engineering Laboratory, CRREL, US Army Material Command, 338
    Description / Table of Contents: CONTENTS: Abstract. - Preface. - Introduction. - Discussion of heat loss survey of six housing units. - Survey of base facilities. - Conclusions. - Literature cited.
    Description / Table of Contents: During the winter of 1973-74 a mobile infrared thermography system was used to survey housing units and base facilities at Pease Air Force Base, Portsmouth, New Hampshire. This report provides both qualitative and quantitative evidence regarding heat flow out of the eave vents of these housing units. Calculations indicate that a significant amount of heat is being lost in this manner due to inadequate attic (cap) insulation. Possible evidence of incomplete ventilation could explain the presence of condensation in the housing units. Analyses of thermograms are presented to show the possible existence of low and high pressure areas around a structure and how they relate to heat loss.
    Type of Medium: Series available for loan
    Pages: iii, 29 Seiten , Illustrationen
    Series Statement: Research report / Cold Regions Research and Engineering Laboratory, CRREL, US Army Material Command 338
    Language: English
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  • 2
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    Hanover, N.H. : U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-202-349
    In: Research report / Cold Regions Research and Engineering Laboratory, 349
    Description / Table of Contents: CONTENTS: Abstract. - Preface. - Introduction. - Test locations. - Post Pond. - Mascoma Lake. - Winter freeze-up. - Ice cover properties. - Stratigraphy. - Microstructure. - Porosity. - Impurity content. - Flexural strength. - Test sites. - Beam test procedure. - Beam dimensions. - Beam temperatures. - Beam strengths. - Results. - Post Pond, Site PB, 12 February 1974. - Post Pond, Site PC, 21 February 1974. - Mascoma Lake, Site MD, 25 February 1974. - Mascoma Lake, Site MD, 26 February 1974. - Mascoma Lake, Site MD, 1 March 1974. - Post Pond, Site PA, 4 March 1974. - Post Pond, Site PA, 7 March 1974. - Post Pond, Site PA, 8 March 1974. - Post Pond, Site PB, 12 March 1974. - Post Pond, Midway between Sites PB and PC, 15 March 1974. - Post Pond, Midway between Sites PA and PB, 26 March 1974. - Post Pond, Midway between Sites PA and PB, 29 March 1974. - Post Pond, Midway between Sites PA and PB, 3 April 1974. - Conclusions. - Literature cited.
    Description / Table of Contents: In-place cantilever beam tests on Post Pond and Mascoma Lake ice yielded a maximum flexural strength of 7.1 kg/cm^2. The minimum strength, unrelated to failure along pre-existing cracks in the ice, was 2.9 kg/cm^2. The majority of tests were performed in the push-down mode after it was discovered that beams tested in the pull-up mode, which places the bottom surface in tension, frequently broke prematurely along cracks in the bottom of the ice. Premature failures of this kind usually occurred at stresses of 2-3 kg/cm^2. Data further demonstrate that the intrinsic strength of lake ice decreases significantly as the surface air temperature goes to 0°C. Ice that has just become isothermal, but has not yet begun to candle, has a strength of about 4 kg/cm^2; ice that has been subjected to prolonged periods of above-freezing air temperatures generally fails at about 3 kg/cm^2. Tests also show that cold unrecrystallized snow-ice is as strong as the underlying lake ice. Tests of the effect of crystalline structure indicate that ice composed of crystals with their c-axes horizontal is measurably stronger than ice in which the crystals are oriented with their c-axes vertical.
    Type of Medium: Series available for loan
    Pages: v, 28 Seiten , Illustrationen
    Series Statement: Research report / Cold Regions Research and Engineering Laboratory 349
    Language: English
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  • 3
    Call number: ZSP-202-346
    In: Research report / Cold Regions Research and Engineering Laboratory, 346
    Description / Table of Contents: CONTENTS: Abstract. - Preface. - USA CRREL project and personnel involvement. - Part I. Introduction. - Background. - Literature review. - Part II. CRREL investigations from 1970 - 1974. - Initial literature survey (1970). - Oil detection kit development. - Survey of Cape Simpson, Alaska, natural crude oil seepages (1970). - Haines-Fairbanks military pipeline investigations (1971-1973). - Barrow investigations (1970-1974). - Fairbanks and Fox investigations. - Germination studies. - Physiological studies. - Dispersant studies. - Microbiological investigations. - Field investigations of accidental petroleum losses. - Part III. Recent related literature. - Part IV. Conclusions and recommendations. - USA CRREL reports, publications and presentations on Alaska oil spill research. - Literature cited.
    Description / Table of Contents: Knowledge concerning the biological effects of oil pollution on arctic and subarctic terrestrial ecosystems is limited. USA CRREL research personnel conducted investigations from 1970 through 1974 to expand information in this field. Objectives were to: 1) define the ecosystems most sensitive to the presence of crude oil or its refined products, 2) quantify and understand the injury response, and 3) establish time frames for manifestation of damage and natural restorative processes in arctic and subarctic regions. This was accomplished through: 1) surveys of natural oil seepages and past accidential spills in the Arctic and Subarctic, 2) initiation of controlled oil spills and 3) detailed laboratory investigations. Results demonstrated that terrestrial oil spills will to some degree be detrimental to both arctic and subarctic plant communities. Degree and longevity of damage will be influenced primarily by the magnitude of the spill, season of occurrence and existing soil moisture content. Rapid recovery of plant communities subjected to spills will occur only if root systems remain relatively unaffected. Damage will be more extensive and long-term when root systems are saturated with oil. Effects of damage will be manifested gradually over several seasons being influenced by winter stresses. Variation does exist in plant species susceptibility. Carex aquatilis, a predominant sedge of the arctic, is markedly resistant to crude oil damage. In the taiga Picea mariana is very susceptible. Plant recovery can be enhanced through the application of fertilizer. Fertilization, in addition to its direct effect on plant nutrition, will stimulate microbial decomposition of crude oil.
    Type of Medium: Series available for loan
    Pages: vii, 66 Seiten , Illustrationen
    Series Statement: Research report / Cold Regions Research and Engineering Laboratory 346
    Language: English
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  • 4
    Call number: ZSP-202-348
    In: Detecting structural heat losses with mobile infrared thermography, Part III
    In: Research report / Cold Regions Research and Engineering Laboratory, CRREL, US Army Material Command, 348
    Description / Table of Contents: During the winter of 1973 - 74 a mobile infrared thermography system was used to survey the USA CRREL building at Hanover, New Hampshire. This report provides a description of excessive heat losses at several locations around the building. This report also discusses the need to carefully monitor meteorological conditions before starting a survey of a building exterior to determine if solar radiation decay from the building surface might interfere with thermographic analysis by masking the heat emanating from within the building.
    Type of Medium: Series available for loan
    Pages: ii, 9 S. : Ill.
    Series Statement: Research report / Cold Regions Research and Engineering Laboratory, CRREL, US Army Material Command 348
    Language: English
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  • 5
    Series available for loan
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    Hanover, N.H. : U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-202-350
    In: Research report / Cold Regions Research and Engineering Laboratory, 350
    Type of Medium: Series available for loan
    Pages: iv, 27 Seiten , Illustrationen
    Series Statement: Research report / Cold Regions Research and Engineering Laboratory 350
    Language: English
    Note: CONTENTS: Abstract. - Preface. - Introduction. - Sample preparation. - Apparatus and testing procedure. - Test results. - Uniaxial strength. - Initial tangent and 50% strength moduli. - Specific energy. - Discussion. - Testing method. - Compressive strength. - Tensile strength. - Ductile and brittle fracture.. - Initial tangent and 50% stress moduli. - Specific energy. - Conclusions and recommendations. - References. - Appendix A: Description of soil and calculations. - Appendix B: Description of the LVDT and averaging circuits. - Appendix C: Determination of strain in the neck section of a dumbbell specimen.
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  • 6
    Call number: Q 2435/41 ; MOP Per 581(3/41) ; ZSP-319/C-41
    In: Geodätische und Geophysikalische Veröffentlichungen : Reihe 3, Physik der festen Erde, Heft 41
    Type of Medium: Series available for loan
    Pages: 248 Seiten , Illustrationen
    ISSN: 0435-6187
    Series Statement: Geodätische und Geophysikalische Veröffentlichungen : Reihe 3, Physik der festen Erde 41
    Language: German , Russian
    Note: Inhaltsverzeichnis Vorbemerkung Teilnehmerverzeichnis Vorträge 0. Meteorologische Einflüsse auf geodätische Messungen / Bahnert, G. 1.1 Terrestrische Refraktion und vertikale Temperaturverteilung über dem Inlandeis Antarktikas / Helbig, A. 1.2. Refraktionsschwankung und Turbulenz / Meier, S. 1.3. Opyt opredelenija pulsacii pokazatelja prelomlenija, c usredneniem izmerenij vo vremeni / Tikasz, E. 1.4. Fisičeskie osnovy slučajnych izmenenij uglov optičeskoj refrakcii v zemnoj atmosfere / Alekaeev, A. u.a. 1.5. Issledovanie refrakcii optičeskich voln v prizemnom sloe atmosfery / Alekseev, A. u.a. 2.1. Der Refraktionseinfluß auf Visuren bis 250 m Länge / Bahnert, G. 2.2. Trigonometrisches Nivellement im Testnetz der TH Praha / Hauf, M. 2.3. Bestimmung der Refraktion bei dem trigonometrischen Nivellement / Blazek, R. 2.4. Refraktionseinfluß auf trigonometrische Nivellements hoher Präzision / Milev, G. 2.5. Bestimmung der Refraktion bei der dreidimensionalen Triangulation insbesondere im Gebirge / Hradilek, L. 2.6. Neuere Untersuchungen in Refraktionsforschungen in Ungarn / Horvath, K. 2.7. Geodeziko-meteorologičeskij metod opredelenija bokovoj refrakcii / Djankov, I. 2.8. Issledovanija vlijanija fluktuacij sobstvennogo izlučenija lazerov i atmosfery na točnost' dispersionnogo metoda izmerenija refrakcii / Suškov, A. 2.9. Issledovanie vozmožnosti ispolzovanija predvestnika dlja oslablenija vlijanija atmosfery na geodezičeskie izmerenija / Galkin, J., Genike, A. 2.10. Brechungsindexschwankungen und die Interferenzerscheinung im Väisälä-Interferometer / Rauhut, J. 2.11. Zur Brechungsindexbestimmung mittels selbstregistrierender Luftrefraktometer auf der Standardbasis Potsdam / Kühne, K. 2.12. Erfassung des Refraktionseinflusses bei geodätischen Interferenzlängenmessungen mittels der Luftdispersion / Schüler, R. 3.1. Theoretische und experimentelle Untersuchungen zur Ermittlung des vertikalen Tagesganges der bodennahen Refraktion zur Ableitung von Einsatzkriterien für Laserleitstrahlsysteme / Hübner, E. 3.2. Erfahrungen über die erreichbare Fluchtungsgenauigkeit mit Lasergeräten im Gelände / Freitag, P., Zschiesche, K. 3.3. Studium der Vibration und der Refraktion durch den Laser / Tlusty, J. 3.4. Beitrag zum Einfluß des systematischen Anteils der Luftturbulenz auf die Richtungsstabilität eines He-Ne-Laserstrahles in Erdbodennähe / Hübner, E. Empfehlungen , Beiträge zum Teil in deutscher, zum Teil in russischer Sprache , Text zum Teil in kyrillischer Schrift
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  • 7
    Call number: Q 2435/39 ; ZSP-319/C-39
    In: Geodätische und Geophysikalische Veröffentlichungen : Reihe 3, Physik der festen Erde, 39
    Type of Medium: Series available for loan
    Pages: 180 Seiten , Illustrationen
    ISSN: 0435-6187
    Series Statement: Geodätische und Geophysikalische Veröffentlichungen : Reihe 3, Physik der festen Erde 39
    Language: German , English
    Note: Inhalt Vorwort 1. Beiträge zu den geologisch orientierten Arbeitsgruppen 4, 7, 9 1.1. OLSZAK, G.: Zur strukturellen Umformung der Erdkruste bei der Entwicklung regionaler tektonischer Elemente 1.2. PAECH, H.-J.: Kurzer Tätigkeitsbericht über geologische Arbeiten in der westlichen Antarktis (Shackleton Range) 1.3. JUBITZ, K.-B.: Die Entwicklung des Amadeus-Beckens in Zentralaustralien - Beckendynamik im Bereich alter Tafeln 1.4. TESCHKE, H.-J.: Sarmato-Turan-Lineament 1.5. SCHROEDER, E.: Probleme der Entwicklung und des Baues der Varisziden in Mitteleuropa und im Gebiet der UdSSR 1.6. SOHROEDER, E.: Beiträge zur vergleichenden Analyse tektonischer Strukturen im Variszikum des Südurals und Mitteleuropas 1.7. SCHWAB, G.; BENEK, R.; BRÜCKNER, W.; JUBITZ, K.-B.; LUDWIG, A.; MEIER, R.; NÖLDEKE, W.; STOLL, A.; TESCHKE, H.-J.: Beckendynamik der Norddeutsch-Polnischen Senke - Paläomobilität im Bereich einer jungen Tafel (Fortschrittsbericht) 1.8. JUBITZ, K.-B.; TESCHKE, H.-J.: Das IGCP-Projekt 86 "SW-Rand der Osteuropäischen Tafel" und seine Beziehungen zum Geodynamik-Projekt 1.9. KRAUSS, M.: Ein Beitrag zur paläotektonischen Abgrenzung, Gliederung und Entwicklung des westlichen Teils der Osteuropäischen Plattform während des Paläozoikum (Gebiet Dänemark - Baltikum) 1.10. LÜTZNER, H.: Sedimentation, Vulkanismus und Tektonik der variazischen Innenmolasse im Thüringer Wald - Studien zur Paläomobilität im Übergangsstockwerk zwischen Geosynklinal- und Tafeletappe im Gebiet der DDR 1.11. LÄCHELT, S.: Geologisch-tektonisch-magmatische Entwicklung und metallogenetische Prozesse 1.12. KRAMER, W.: Zu einigen basischen magmatischen Formationen im Gebiet der DDR und deren geotektonischer sowie metallegenetischer Bedeutung 1.13. RÖSLER, H.J.; WERNER, C.-D.: Variazische Initialmagmatite Mitteleuropas 1.14. BENEK, R.: Vulkanit-Formationen als Indikatoren der Krustenfelderung bzw. unterschiedlichen Mobilitätsverhaltens 1.15. BANKWITZ, P.: Überblick über Magmatismus und Metamorphose im Altpaläozoikum Mittel- und Westeuropas 1.16. LÄCHELT, S.: Beziehungen zwischen der Blocktektonik, dem Magmatismus und der endogenen Metallogenie im mitteleuropäischen Raum 1.17. PAECH, H.-J.: Zum Ablauf tektogener Deformationen im mitteleuropäischen Variszikum 1.18. BANKWITZ, P.; BANKWITZ, E.; FRISCHBUTTER, A.: Zur Tektonik des Präkambriums der Elbezone und ihres Rahmens 1.19. BENEK, R.; FRISCHBUTTER, A.; NEUMANN, W.: Methodische Arbeiten im Kristallin des Baikal-Riftes 1.20. NEUMANN, W.: Paläogeographie und Paläotektonik des Nossen-Wilsdruffer Schiefergebirges (Saxothuringikum im Bereich des Zentralsächsischen Lineamentes) 1.21. LUDWIG, A.O.: Paläogeographie und Paläotektonik des Saxen von Mitteleuropa 1.22. MEIER, R.: Halogenese und Beckendynamik 1.23. BANKWITZ, P.; BANKWITZ, E.: Geologische Interpretation rezenter Krustenbewegungen Osteuropas 1.24. LUDWIG, A.O.: Zum gegenwärtigen Stand der Quartärforschung im südlichen Ostseeraum - Paläogeographie, Neotektonik, Aussagen zur Paläotektonik 1.25. ELLENBBRG, J.; FALK, F.; GRUMBT, E.; LÜTZNER, H.: Methodik der Untersuchungen von Molassen 1.26. NEUMANN, W.: Geologisches Modell zur Interpretation des tiefenseismischen NW - SE-Profils zwischen Granulit- und Erzgebirge 2. Beiträge zu der geophysikalisch-geodätisch orientierten Arbeitsgruppe 5 2.1. BÖLSCHE, J.; KRESSER, K.-D.: Erste Ergebnisse reflexionsseismischer Tiefenerkundung auf einem Profil von 30 km Länge im Süden der DDR 2.2. GRÄSSL, S.; HURTIG, E.; GRÜNTHAL, G.: Untersuchungen zum Bau der Erdkruste mit Hilfe seismischer Dreikomponentenregistrierungen 2.3. SCHULZE, A.: Untersuchungen zur Auflösung von Interferenzstrukturen seismischer Wellen mit Hilfe von Polarisationsfiltern 2.4. GROSSER, H.: Einfluß der Geometrie seismischer Punktwellen auf den Spektralinhalt des Wellenfeldes 2.5. STILLER, H.; WAGNER, F.C.; VOLLSTÄDT, H.: Die Geschwindigkeiten elastischer Wellen im klüftigen Gestein und in Erdbebengebieten 2.6. GRÜNTHAL, G.; HURTIG, E.: Zur .makroseismischen Auswertung des Friaul-Erdbebens vom 6. Mai 1976 auf dem Territorium der DDR 2.7. NEUNHÖFER, H.: Observation of microearthquakes in the Vogtland region since 1962 2.8. MAAZ, R.: Zur Statistik von Erdbeben 2.9. ELSTNER, CL.; HARNISCH, G.; ALTMANN, W.: Präzisionsgravimetrische Messungen auf der W - E-Linie der DDR 1970-76 2.10. FISCHER, H.; NEUBERT, R.: Instrumentelle Entwicklungen auf dem Gebiet der Laser-Satellitenentfernungsmessung 2.11. MONTAG, H.; GENDT, G.: Zur Untersuchung geodynamischer Parameter mit Hilfe von Satellitenbeobachtungen 2.12. JOCHMANN, H.: Betrachtungen zur Variation einiger Parameter der Polbewegung 2.13. HÖPFNER, J.: Untersuchungen von Amplituden- und Phasenänderungen der CHANDLER-, Jahres- und Halbjahreswelle 2.14. ARNOLD, K.: Einige Betrachtungen zum Auftreten und zur Bedeutung von Lateralinhomogenitäten der Dichte im Erdinneren 2.15. WALZER, U.: Report on mantle convection 2.16. SEIPOLD, U.: Messungen der thermischen Eigenschaften von Gesteinen unter extremen Bedingungen 2.17. ULLMANN, W.: Thermische Zustandsgleichung und GRÜNEISEN-Parameter zur Erforschung des tiefen Erdinneren 2.18. DITTFELD, H.-J.: Experimentelle Aussagen zum dynamischen Effekt des flüssigen Erdkerns 2.19. KOWALLE, G.: Untersuchung zur Dämpfung seismischer Wellen im Erdkern 2.20. DONNER, F. ; GÖTHE, W.; KNOTHE, C.; OELSNER, C.; PORSTENDORFER, G.:Beiträge der Tiefenelektromagnetik, Tiefenseismik und Geothermie zum Geodynamik-Projekt 2.21. HURTIG, E.; STROMEYER, D.: Temperatur-Tiefenverteilung und Viskosität im oberen Erdmantel unter Europa 2.22. OELSNER, C.: Eine Wärmestromanomalie im Gebiet von Freiberg (Sachsen) (in memorian Ferdinand Reich) 2.23. STROMEYER, D.: Studien zur Inversion geothermischer Daten 2.24. MAYER, P.: Einige Ergebnisse magnetisoher Messungen· im Nordatlantik 2.25. MENNING, M.: Tektonische Untersuchungen mit Hilfe der paläomagnetischen Bearbeitung von Bohrkernen 2.26. ROTHER, K.; WIEGANK, F.: Zur Interpretation paläomagnetischer Daten von Europa 2.27. MUNDT, W.: Zum Nachweis lokaler Säkularvariationsanomalien im Gebiet der DDR 2.28. MUNDT, W.; PORSTENDORFER, G.: Mögliche Zusammenhänge zwischen einer elektrischen Leitfähigkeitsanomalie im Erdmantel und anomalen magnetischen Säkularvariationen in Mitteleuropa 2.29. RITTER, E.: Zum Problem geoelektrischer Leitfähigkeitsanomalien und Tiefenbau von Kruste und oberem Mantel 2.30. HARWARDT, H.: Aufbau einer Strainmeteranlage in der Untertagestation Tiefenort 2.31. HARNISCH, G.: Zur Autokorrelationsfunktion der rezenten vertikalen Krustenbewegungen 2.32. THURM, H.; BANKWITZ, P.; HARNISCH, G.: Rezente horizontale Deformationen der Erdkruste im Südostteil der Deutschen Demokratischen Republik 2.33. KAUTZLEBEN, H.: Zur geophysikalischen Interpretation der planetaren Dynamik der Erde 3. Ergänzende Literatur 3.1. Untersuchung zur Geologie und Geophysik von Meeresböden (WG 4) 3.2. Rezente Erdkrustenbewegungen (WG 5) 3.3. Beziehungen zwischen Metamorphose und Tektonik (WG 9) 4. Autorenverzeichnis , Beiträge teilweise in deutscher, teilweise in englischer Sprache
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  • 8
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    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-201-76/34
    In: CRREL Report, 76-34
    Description / Table of Contents: Some physical characteristics of two grounded floebergs (fragments of multi-year pressure ridges) near Prudhoe Bay, Alaska, are described. Cross-sectional profiles of the sails and keels of both floebergs were obtained. A sail to keel ratio of 1 to 3.38 obtained with one floeberg was found to be in good agreement with previous investigations. A survey of the sea floor for evidence of scoring induced during grounding yielded a maximum depth of gouging of 1.1m. Additional studies included investigations of the internal structure of the floebergs, and a brief examination of the organic and sedimentary debris found entrained within the floebergs. The grounding of ice on the continental shelves of the Arctic is of considerable interest to those concerned with the development and impact of development of these continental shelves. The field study reported here provides information useful in assessing the nature and characteristics of interactions between floebergs and the sea bed on which they are grounded.
    Type of Medium: Series available for loan
    Pages: iii, 13 Seiten , Illustrationen
    Series Statement: CRREL Report 76-34
    Language: English
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  • 9
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    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-201-95/11
    In: CRREL Report, 95-11
    Description / Table of Contents: A pavement joint seal prevents the passage of liquids into the pavement base and the intrusion of solids into the joint. The primary mechanical requirements of a pavement seal are that it respond elastically or viscoelastically to any movement of the joint without failure and that it withstand indentation of hard objects like rocks. Because pavement joint movements and seal deformations can be large, elastomeric sealants are often used to form seals. Winter conditions are recognized as the most critical for a seal because of the possibility that failure stresses will be reached as the joint opens to a maximum and the material stiffens in response to the temperature reduction. This report reviews the specific problems and requirements that cold climates create for the performance of elastomeric seals. Emphasis is placed on the material response behavior that can lead to failure of a seal. In an attempt to clarity the mechanics of sealant and seal performance associated with low-temperature pavement applications and to address the issue of low-temperature stiffening That should be a dominant factor in the selection of a sealant, this report presents background information on the formulation and mechanical properties of elastomeric seal materials and the structural behavior of field-molded joint and crack seals.
    Type of Medium: Series available for loan
    Pages: iv, 20 Seiten , Illustrationen
    Series Statement: CRREL Report 95-11
    Language: English
    Note: CONTENTS Page Preface Introduction Elastomers and sealant formulations Mechanical behavior of sealants Phenomenological behavior of rubbers and elastomers Hyperelastic constitutive model Examples of sealant behavior Mechanical response of seals Basic structural geometry and loading configurations of seals Conventional performance testing for studying the load and deformation response of joint and crack seals Response of seals to joint movements Summary and recommendations Literature cited Abstract
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  • 10
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    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-201-76/36
    In: CRREL Report, 76-36
    Description / Table of Contents: In the past decade, various workers have investigated the use of high-frequency electromagnetic radiation for breaking and excavating rock and frozen ground. This report reviews the high-frequency dielectric properties of these materials, the physics of heating, and the existing literature on these subjects. The high-frequency dielectric properties of rocks and soils, and the absorption of energy by these materials, are mainly determined by their liquid water contents. Computer modeling was used to calculate absorption energy as a function of distance behind irradiated faces of earth materials. The resulting computations showed that most energy is absorbed in the first few centimeters of frozen ground and weak soils. However, in hard rocks of low water content, electromagnetic waves penetrate more deeply, and significant amounts of energy are also absorbed tens of centimeters behind the irradiated faces. Test results showed that electromagnetic rock breakage is feasible only for excavations in hard rock; test results from the use of electromagnetic radiation for excavating tunnels in weak rocks and frozen ground are not promising.
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    Pages: iii, 23 Seiten , Illustrationen
    Series Statement: CRREL Report 76-36
    Language: English
    Note: CONTENTS Preface Introduction Sorption and desorption of organic contaminants Decontamination methods Aqueous cleaning methods Cleaning or rinsing with organic solvents Chemical neutralization methods Current protocols to decontaminate groundwater sampling devices Variations in methodology Special instructions for cleaning pumps Effectiveness of various decontamination methods Low-temperature considerations Conclusions Literature cited
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