GeoTesting Express is a provider of Rock Testing Services – ASTM D, Standard Test Method for Unconfined Compressive Strength of Intact Rock Core . All the Controls products ASTM D standard. Enter now!. ASTM D “Standard Test Method for Unconfined ASTM D “ Standard Test Methods for Compressive Strength and.

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No further reproductions authorized. Remember me for one month. The right to access the electronic files of ASTM Standards is for purposes of viewing for individual use only. Register for a trial account. Specimens shall be free from abrupt irregularities that can generate stress concentrations.

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Enter your personal account email address to request asm password reset: Sample Size Requirements Rock samples are grouped on the basis of both rock type and estimated strength. Specimens in the form of core are preferred for a more precise classification.


Size and shape requirements for diametral, axial, block, or irregular lump testing are presented in the test method. The electronic file may not be reproduced in any way.

When testing core or block specimens at least ten specimens are selected. Content only available by subscription.

The failure load is used to calculate the point astj strength index and to estimate the uniaxial compressive strength. When testing irregular-shaped specimens obtained by other means at least 20 specimens are selected. No items in cart.

Are you sure you want to empty the cart? When extensive testing is required for preliminary and reconnaissance information, alternative tests such as the point load test can be used in the field or laboratory asfm reduce the time and cost of compressive strength tests.

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The concentrated load is applied through coaxial, truncated conical platens. The point load test allows testing of rock specimens that do not meet the dimensional requirements of the uniaxial compression test.


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Please login to your authorized staff account to use this feature. ASTM grants you a license as follows: The uniaxial compression test see ASTM D is used to determine compressive strength of rock specimens, but it is a time-consuming and expensive test that requires specimen preparation.