Eighth International Conference on Case Histories in Geotechnical Engineering
Cyclic Triaxial Tests on Crushed Limestone for Base Layers
Publication: Geo-Congress 2019: Geotechnical Materials, Modeling, and Testing (GSP 310)
ABSTRACT
Unbound aggregate utilized in base and subbase layers distribute the imposed load induced stresses to protect subgrade. Although the percentage of fines content in aggregates used for these layers rarely exceeds 20%, however, the behavior of aggregate skeleton is significantly influenced by the fines content characteristics. In this study, the effect of fines content (from 5% to 12%), plasticity index (from 5% to 9%), and dust ratio (from 0.4 to 1.0) of crushed limestone aggregate matrix on cyclic behavior of base and subbase layers are investigated. Cyclic tests are conducted to identify the resilient modulus, recoverable and permanent deformation of crushed limestone samples prepared at optimum moisture content with Illinois dense-graded standard gradation, i.e., CA 6. It is observed that fines content 12% is sensitive to permanent deformation and resilient modulus when the dust ratio is 0.4 and 0.6. However, at dust ratio 1.0, fines content 12% also showed effective response against permanent deformation and resilient modulus. With an increase of fines content from 5% to 12%, the permanent deformation increased and resilient modulus decreased when the dust ratio was 0.4 and 0.6, however, it behaved completely opposite at dust ratio of 1.0.
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ACKNOWLEDGEMENTS
This publication is based on the results of R27-157, Plasticity Requirement of Aggregate used in Base and Sub-base. ICT R27-157 was conducted in cooperation with the Illinois Center for Transportation; the Illinois Department of Transportation, Office of Program Development, and the US Department of Transportation, Federal Highway Administration. The authors would like to acknowledge the members of IDOT Technical Review (TRP) for their useful advice at different stages of research. The contents of this paper reflect the views of the authors only.
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Information & Authors
Information
Published In
Geo-Congress 2019: Geotechnical Materials, Modeling, and Testing (GSP 310)
Pages: 259 - 267
Editors: Christopher L. Meehan, Ph.D., University of Delaware, Sanjeev Kumar, Ph.D., Southern Illinois University Carbondale, Miguel A. Pando, Ph.D., University of North Carolina Charlotte, and Joseph T. Coe, Ph.D., Temple University
ISBN (Online): 978-0-7844-8212-4
Copyright
© 2019 American Society of Civil Engineers.
History
Published online: Mar 21, 2019
Published in print: Mar 21, 2019
ASCE Technical Topics:
- Base course
- Cyclic tests
- Dust
- Engineering fundamentals
- Engineering materials (by type)
- Environmental engineering
- Geomechanics
- Geotechnical engineering
- Infrastructure
- Laboratory tests
- Limestone
- Load tests
- Material tests
- Materials engineering
- Pavements
- Pollutants
- Soil dynamics
- Soil mechanics
- Stones
- Tests (by type)
- Transportation engineering
- Triaxial loads
- Triaxial tests
Authors
Metrics & Citations
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