Void Ratio and Shear Strength of Two Compacted Crushed Stones, Progress Report, HR-99

(1966) Void Ratio and Shear Strength of Two Compacted Crushed Stones, Progress Report, HR-99. Transportation, Department of

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Abstract

Triaxial compression tests of two crushed limestones of differing highway service records indicate a fundamental difference in their shear strength -- void ratio relationship. Analyses were based on stress parameters at minimum sample volume, i.e., before there was significant sample dilation due to shear. The better service record sample compacted to higher density, and had a high effective angle of internal friction and zero effective cohesion. The other sample compacted to lower density and had a lower friction angle, but gained significant stability from effective cohesion. Repeated loading-unloading cycles reduced the cohesion, apparently due to modification of the sample structure. Extrapolations of the results to zero void ratio agree with sliding friction data reported on calcite, or with triaxial parameters reported on carbonate rocks.

Item Type: Departmental Report
Keywords: Calcites, Crushed limestone, Data analysis, Laboratory tests, Shear strength, Shear tests, Sliding friction, Triaxial shear tests, Void ratios
Subjects: Transportation > Pavements
Transportation
Transportation > Materials
Transportation > Roads and highways
Transportation > Research
Transportation > Data and Information Technology
ID Code: 17235
Deposited By: Iowa DOT Library
Deposited On: 16 Jun 2014 14:23
Last Modified: 19 Jun 2017 21:19
URI: http://publications.iowa.gov/id/eprint/17235