ASTM D7012 – 10 PDF

1 Jan Buy ASTM D TEST METHOD FOR COMPRESSIVE STRENGTH AND ELASTIC MODULI OF INTACT ROCK CORE SPECIMENS. 5 Aug UNCONFINED COMPRESSIVE STRENGTH of INTACT ROCK CORE SPECIMENS. ASTM D Method C SOP S CLIENT: CLIENT. ASTM D Standard Test Methods for Compressive Strength and Elastic if the difference in elastic moduli in two orthogonal directions is greater than

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By definition the tensile strength is obtained by testing direct uniaxial tension, but this trial has difficulties operating its applicability and cost generated, thus determining the tensile strength in the specimen is more practical if performed by the indirect tensile test or Brazilian, mainly operating and cost issues.

Laboratory Tests on Rock – List of Tests – Tonon USA

However, this remains a theoretical proposal based on non-destructive methods that need data during the advance poll. To further specify the present invention, are presented below defining some related concepts:. ISRM suggested method for determination of the Schmidt hammer rebound hardness: Generally speaking with respect to stress components or rr and OEE is appreciated that the variation of the stress state for the component or “within the central area of the disc is increased by about 10 times but is maintained under tension between both the variation of the stress state for OQQ component increases but less provide approximately only twice, maintaining the compression state for this component.

Thus the present invention allows an optimized use of the specimen recovered, ensuring the production of mechanical parameters by full unconfined compression of the sample, when this is subjected to a load of diametral type, the geometry of the specimen has a similarity to ASTM D used in the standard. It should ensure a fine surface on the peripheral surface of ast, disc, and should lubricate the contact region confining the jaws.

The method and apparatus of the document US are used to determine the compressibility of the pore volume, porosity effort and changing the relative porosity of rock samples from a rock deposit.


Patent CA 18 presents a technique to determine directly x7012 compressive strength of a sample of rock formation by indentation technique, with which one can determine the mechanical properties of rock fragments.

The invention may be practiced in real time by using measurement techniques while drilling or after drilling by using the recorded data or measurement data polling openhole.

Tensile strength, mechanical parameter obtained from subjecting the specimen astk a system load trying to separate their structure, these loads are applied in opposite directions, until sample failure occurs, materials such as rocks and simple concrete have relatively low tensile strength.

ASTM D4555:10

To determine the resistance of rock specimens, the tests specified above are used. The results showed a marked decrease in the concentration part when an effective height 23 of 5mm is had.

The compressive strength of the rock is used in many design formulas and is sometimes used as an index property to select appropriate excavation astmm. This document also corresponds to a theoretical proposal that requires the recording of data during the drilling.

To achieve the above objectives proposed, jaw model containment and a method to characterize the specimens of materials through the application of unconfined compression disc-shaped samples and subjected to loads distributed diametrically developed. Country of ref document: Indirect tensile strength, mechanical to determine the tensile strength, by applying compressive loads concentrated in a disk-shaped specimen parameter, in which the stress field generated voltage exceeds compressions; therefore it fails the sample through an induced voltage more not direct.

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This is one of the simplest tests in rock mechanics and which are generated in the specimen large stress fields that induce failure of the sample voltage. Therefore, the developed jaws comprise the following characteristics: The internal stress state of a disc under diametral loads presents a complex distribution that varies significantly depending on the type of applied load.

The invention EP document is directed to the use of systems and methods that determine the geological properties using acoustic analysis. To this end, the representation of the stress distribution can be made from lines of the same level of effort.


To perform the test, the sample material 15 is held by an upper support sstm and a lower 17 which are connected with the rollers 1 1 of the compression system. A device for determining the resistance to unconfined compressive rock samples or other materials disc shaped and subjected to diametral load, consisting of a compression system rollers 1 1a load frame 12a strain gage 13 placed in a fixed area 14 assembly and a sample of material shaped disc 19 fastened by means of brackets attached to the rollers 1 1 of the compression system.

Field of the Invention The present invention is applicable within the field of geotechnical and more specifically awtm the analysis of samples of rock materials for exploration geomechanical characterization also can expand its application to the field of strength of materials.

The jaws should be available in greased and be axially aligned to prevent deformation of the fins during contact with the disk rock core. Start Webshop Product catalog Product presentation.

Standards – APS – Wille Geotechnik

However this is a theoretical proposal based on non-destructive methods. The test specimen must have a minimum diameter corresponding to a drill bit NX series, with an effective sample of 54mm Numeral 3. Single fracture method and apparatus for simultaneous measurement of in-situ earthen stress state and material properties.

The characterization method comprises the following steps:. Specifically for exploration in xstm using drills and robust rigs make sometimes wasteful maneuvers obtaining cores, also the operator’s experience has a significant impact on the specimens obtained are suitable for carrying out the minimum laboratory tests.

These recovered specimens d77012 subjected to various laboratory tests with the aim of finding the mechanical properties of the material and make integral part of the development of a civil work. ast

Detailed Description of the Preferred Embodiments.