The Significance of Cap and Base Restraint

by James Michael Duncan,
Peter Dunlop,

Serial Information: Journal of the Soil Mechanics and Foundations Division, 1968, Vol. 94, Issue 1, Pg. 271-290

Document Type: Journal Paper

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Techniques for reducing cap and base restraint are discussed, and a method for assuring effective elimination of restraint with lubricated caps and bases is presented. The effects of cap and base restraint on specimen deformation, stress-strain behavior, compression strength, strength parameters, pore pressures, and volume changes are examined. In general, the effects of cap and base restraint are not significant; the use of lubricated caps and bases is mandatory only when volume changes in drained tests must be measured with very high accuracy.

Subject Headings: Compressive strength | Deformation (mechanics) | Parameters (statistics) | Pore pressure | Volume measurement | Stress strain relations | Drainage

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