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Title: Properties of Cedar City tonalite
Authors: United States. Defense Atomic Support Agency.
Saucier, K. L.
Keywords: Cedar City tonalite
Mine Shaft (Series)
Rock properties
Rock tests
K. L. Saucier
Issue Date: Jun-1969
Publisher: Concrete Laboratory (U.S.)
Engineer Research and Development Center (U.S.)
Series/Report no.: Miscellaneous paper (U.S. Army Engineer Waterways Experiment Station) ; C-69-9.
Description: Miscellaneous paper
Abstract: Laboratory tests were conducted on rock core samples received from the MINE SHAFT test site near Cedar City, Utah, to determine the integrity and mechanical behavior of the material. The results were to be used in formulating a constitutive model for code calculations of earth motions and stresses induced by the blast loadings. The area selected for the tests appeared to consist of a relatively uniform, somewhat weathered rock, identified as tonalite. The following physical property results were typical of the material behavior in the sub-kilobar pressure regime. Specific gravity 2.6 Porosity, percent 5.0 Tensile strength, psi 900 Shear strength intercept, psi 2,400 Unconfined compresfilve strength, psi 15,000 Compression wave velocity, fps 13,000 Shear wave velocity, fps 7,500 Loading Young's modulus (unconfined), 106 psi 3.0 Loading Young's modulus (confined), 106 psi 5.0 Initial loading bulk modulus, 106 psi 1.0 Poisson's ratio 0.2 Initial angle of shearing resistance (intact samples), degrees 45 Initial angle of shearing resistance (jointed samples), degrees 37 The "elastic" constants listed above do not necessarily correlate with one another; they only represent typical values from various test results. In general, all stress-strain behavior of the material was nonlinear and inelastic (hysteretic).
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