BCD: A Soil Modulus Device for Compaction Control
There is a trend toward using the modulus as an alternative to dry density in compaction control because of the undesirable nuclear source in the current field density gage and because a modulus is often used in the design of roadway bases and compacted fills. The Briaud compaction device (BCD) is a new instrument used to obtain a soil modulus in only a few seconds; it consists of leaning on a rod equipped with a thin circular metal plate at the bottom end and recording the bending of that plate under a standard load. This article describes the theory and the experiments that have been performed to validate the new instrument. This validation is based on a comparison to a simple plate test and on a numerical simulation of the BCD test. A recommended procedure is outlined in the conclusions. The BCD is used in the lab on top of the soil in the Proctor mold to obtain the lab modulus versus water content curve and select a target value. Then the BCD is used in the field to verify that the target modulus has been achieved.
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Availability:
- Find a library where document is available. Order URL: http://worldcat.org/oclc/3519342
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Authors:
- Briaud, Jean-Louis
- Li, Yanfeng
- Rhee, Keunyoung
- Publication Date: 2006-1
Language
- English
Media Info
- Media Type: Print
- Features: Figures; Photos; References;
- Pagination: pp 108-115
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Serial:
- Journal of Geotechnical and Geoenvironmental Engineering
- Volume: 132
- Issue Number: 1
- Publisher: American Society of Civil Engineers
- ISSN: 1090-0241
- Serial URL: http://ojps.aip.org/gto
Subject/Index Terms
- TRT Terms: Compaction; Laboratory tests; Measuring instruments; Modulus of elasticity; Moisture content; Plate bearing test; Soil compaction; Soil water; Validation
- Uncontrolled Terms: Numerical simulations; Soil modulus
- Subject Areas: Geotechnology; Highways; I42: Soil Mechanics;
Filing Info
- Accession Number: 01022759
- Record Type: Publication
- Files: TRIS
- Created Date: Apr 13 2006 2:09PM