完整岩心试样张裂抗拉强度的标准试验方法

详细信息   

• 中文主题词：岩石 ; 抗拉强度 ; 试样 ; 施工材料 ; 天然石料 ; 石 ; 试验 ; 建筑
• 标准号：ASTM D3967-2005
• 发布日期：2005
• 英文题名：Standard Test Method for Splitting Tensile Strength of Intact Rock Core Specimens
• 英文主题词：compression testing ; indirect tensile strength ; loading tests ; rock ; splitting tensile strength ; tension (tensile) properties/tests
• 标准状态：现行
• 发布单位：US-ASTM
• 国际标准分类号：93.020 (Earth works. Excavations. Foundation construction. Underground works)
• 载体形态：3P.;A4
• 中国标准分类号：P13
• 国别：美国材料与试验协会

文摘

By definition the tensile strength is obtained by the direct uniaxial tensile test. But the tensile test is difficult and expensive for routine application. The splitting tensile test appears to offer a desirable alternative, because it is much simpler and inexpensive. Furthermore, engineers involved in rock mechanics design usually deal with complicated stress fields, including various combinations of compressive and tensile stress fields. Under such conditions, the tensile strength should be obtained with the presence of compressive stresses to be representative of the field conditions. The splitting tensile strength test is one of the simplest tests in which such stress fields occur. Since it is widely used in practice, a uniform test method is needed for data to be comparable. A uniform test is also needed to insure positively that the disk specimens break diametrally due to tensile pulling along the loading diameter.

Note 28212;Notwithstanding the statements on precision and bias contained in this test method; the precision of this test method is dependent on the competence of the personnel performing it, and the suitability of the equipment and facilities used. Agencies that meet the criteria of Practice D 3740 are generally considered capable of competent and objective testing. Reliable testing depends on many factors; Practice D 3740 provides a means of evaluating some of these factors.

1.1 This test method covers testing apparatus, specimen preparation, and testing procedures for determining the splitting tensile strength of rock by diametral line compression of a disk.

Note 1

The tensile strength of rock determined by tests other than the straight pull test is designated as the "indirect" tensile strength and, specifically, the value obtained in Section of this test is termed the "splitting" tensile strength.

1.2 The values stated in SI units are to be regarded as the standard.

1.3 All dimension and force measurements, and stress calculations shall conform to the guidelines for significant digits and rounding established in Practice D 6026.

1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. 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.