Signatur:
ZSP-201-86/13
In:
CRREL Report, 86-13
Beschreibung / Inhaltsverzeichnis:
Stress-deformation data for six granular soils ranging from sandy silt to dense-graded crushedstone were obtained from in-situ tests and laboratory tests. Surface deflections were measured in the in-situ tests, with repeated-load plate-bearing and falling-weight deflectometer equipment, when the six granular soils were frozen, thawed, and at various stages of recovery from thaw weakening. The measured deflections were used to judge the validity of procedures developed for laboratory triaxial tests to determine nonlinear resilient moduli of specimens in the frozen, thawed, and recovering states. The validity of the nonlinear resilient moduli, expressed as functions of externally applied stress and moisture tension, was confirmed by using the expressions tocalculate surface deflections that were found to compare well with deflections measured in the in-situ tests. The tests on specimens at various stages of recovery are especially significant because they show a strong dependence of the resilient modulus on moisture tension, leading to the conclusion that predictions or in-situ measurements of moisture tension can be used to evaluate expected seasonal variation in the resilient modulus of granular soils.
Materialart:
Schriftenreihen ausleihbar
Seiten:
iv, 148 Seiten
,
Illustrationen
Serie:
CRREL Report 86-13
URL:
http://hdl.handle.net/11681/9463
Sprache:
Englisch
Anmerkung:
CONTENTS
Abstract
Preface
Introduction
Test sections
Installing instruments and sampling
Laboratory tests
Asphalt concrete
Base, subbase and subgrade soils
Data analysis for base, subbase and subgrade soils
Field tests
Analysis of plate loading tests
Analytical approach
Results
Discussion
Conclusions
Literature cited
Appendix A: Field data
Appendix B: Ground temperatures, moisture tension, water table and freezing iso-therms prevailing during plate loading tests
Appendix C: Measured surface deflections compared with deflections calculated by NELAPAV
Appendix D: Resilient moduli and supporting data calculated by NELAPA V at radius 0.0, taxiways A and B.
Standort:
AWI Archiv
Zweigbibliothek:
AWI Bibliothek
