GeoTesting Express is a provider of Rock Testing Services – ASTM D – Sliding Friction,(Rock Sliding Friction) Standard Test Method for Performing. GeoTesting Express is a provider of Rock Testing Services – ASTM D – Direct Shear,(Rock Direct Shear) Standard Test Method for Performing Laboratory. Lab ID: ASTM D Use. This test method establishes requirements and laboratory procedures for performing direct shear strength tests on rock specimens.
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Examples of an artificial discontinuity include a rock-concrete interface or a lift line from a concrete pour. It includes procedures for both intact rock strength and sliding friction tests which can be performed on specimens that are homogeneous or have planes of weakness, including natural or artificial discontinuities. Relationships derived from the test data include shear strength versus normal stress and shear stress versus shear displacement shear stiffness. In situ direct shear testing limits the inherent scale effects found in rock mechanics problems where the laboratory scale may not be representative of the field scale.
It is beyond the scope of these test methods to consider significant digits used in analysis methods for engineering design. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. Users of this standard are cautioned that compliance with Practice D does not in itself assure reliable results. The test is usually conducted in the undrained state with an applied constant normal load.
Therefore, it may be necessary to handle specimens in accordance with Practice D and to document moisture conditions in some manner in the data collection. Relationships derived from the test data include shear strength versus normal stress and shear stress versus shear displacement shear stiffness. Order Form 2 Email complete form to contact listed below. For more info please refer to Releted Products below and Accessories section. Report of direct shear strengths five to nine pages depending on sample type including the following:.
It is a simple and practical method of determining the strength and slope stability of rock, both in the field and in the laboratory. Note 1—The term “normal force” is used in the title instead of normal stress because of the indefinable area of contact and the minimal relative displacement between upper and lower halves asfm the specimen during testing.
Active view current version of standard. However, a clean, open discontinuity may be free draining, and, therefore, a test on a clean, open discontinuity could be considered a drained test. This test method d55607 requirements and laboratory procedures for performing direct shear strength tests on rock specimens. Therefore, the precise prediction of rock mass behavior is difficult.
Historical Version s awtm view previous versions of standard. Therefore nominal area is used for loading purposes and calculations. Discontinuities may be open, partially or completely healed or filled that is, clay fillings and gouge. When the normal force is not sufficient to restrain dilation, the shear mechanism consists of the overriding of the asperities.
The quality of the result produced by this standard is dependent on the competence of the personnel performing it, and the suitability of the equipment and facilities used.
Pervasive discontinuities joints, bedding planes, shear zones, fault zones, schistosity in a rock mass, and genesis, crystallography, texture, fabric, and other factors can cause the rock mass to behave as an anisotropic and heterogeneous discontinuum. Only one discontinuity per specimen can be tested.
The values given in parentheses are mathematical conversions to inch-pound units, which are provided for information only and are not considered standard. Reliable results depend on many factors, Practice D provides a means of evaluating some of those factors.
Rock shear box apparatus
The actual contact areas during testing change, but the actual total contact surface is unmeasurable. Samples should be sealed in a plastic wrap inside their shipping container, protected against air, moisture, and direct sunlight.
However, a clean, open discontinuity may be free draining, and, therefore, a test on a clean, open discontinuity could be considered a drained test. When the normal load is large enough to completely restrain dd5607, the shear mechanism consists of the shearing off of the asperities.
Please contact a CTLGroup d5670 services representative or Project Manager to discuss your individual project needs and testing response times.
Samples should be concrete or rock cores with a diameter no greater than The constant normal load boundary condition is appropriate for problems where the normal stress is constant along the discontinuity. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
In addition, they are representative of the significant digits that generally should atsm retained. The x5607 consists of a shear box designed to accept samples not larger than x mm, or alternatively cores up to mm dia.
SET OF 4 DIAL GAUGES TO ASTM D | Matest
Discontinuities may be open, partially or completely healed or filled that is, clay fillings and asfm. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.
Reporting of test results in units other than SI shall not be regarded as nonconformance with this test method. Two set of cables are d560. ASTM D Use This test method establishes requirements and laboratory procedures for performing direct shear strength tests on rock specimens. Clearly label the sample with source, date r5607, intact or sliding friction, and a short, unambiguous, identification code. Since this test method makes no provision for the measurement of pore pressures, the strength values determined are expressed in terms of total stress, uncorrected for pore pressure.