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Description of ASTM-D5335 1999ASTM D5335-99Historical Standard: Standard Test Method for Linear Coefficient of Thermal Expansion of Rock Using Bonded Electric Resistance Strain GagesASTM D5335Scope 1.1 This test method covers the laboratory determination of the linear (one-dimensional) coefficient of thermal expansion of rock using bonded electric resistance strain gages. 1.2 This test method is applicable for unconfined pressure conditions over the temperature range from 68 to 500°F (20 to 260°C). Note 1-Unconfined tests performed at elevated temperatures may alter the mineralogy or grain structure of the test specimen. This alteration may change the physical and thermal properties of the test specimen. Note 2-The strain gages are mounted with epoxy. Most commercially available high temperature epoxies require elevated temperature curing. The elevated temperature required for this curing may alter the physical and thermal properties of the test specimen. Epoxy should be selected based upon the maximum expected test temperature. Room temperature curing epoxy should be used whenever possible.1.3 The test specimens may be either saturated or dry. If saturated specimens are used, then the test temperature must be at least 5°C less than the boiling point of the saturating fluid in order to minimize vaporization of the fluid. Note 3-When testing a saturated specimen, the moisture content of the specimen may change unless special precautions are taken to encapsulate the test specimen. Refer to 7.4.1.4 For satisfactory results in conformance with this test method, the principles governing the size, construction, and use of the apparatus described in this test method should be followed. If the results are to be reported as having been obtained by this test method, then all pertinent requirements prescribed in this test method shall be met. 1.5 It is not practicable in a test method of this type to aim to establish details of construction and procedure to cover all contingencies that might offer difficulties to a person without technical knowledge concerning the theory of heat flow, temperature measurement, and general testing practices. Standardization of this test method does not reduce the need for such technical knowledge. It is recognized also that it would be unwise, because of the standardization of this test method, to resist in any way the further development of improved or new methods or procedures by research workers. 1.6 The values stated in inch-pound units are to be regarded as the standard. The SI units given in parentheses are for information only. 1.7 This standard does not purport to address all of the safety problems, 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. Keywords Electric resistance strain gages; Heating tests-soil/rock; Linear coefficient of thermal expansion; Strain gages; Temperature tests-soil/rock/related materials; Thermal expansion/contraction; Thermal properties; rock-linear coefficient of thermal expansion, using bonded electric; resistance strain gages, test ICS Code ICS Number Code 93.020 (Earth works. Excavations. Foundation construction. Underground works) DOI: 10.1520/D5335-99 The following editions for this book are also available...This book also exists in the following packages...Subscription InformationMADCAD.com ASTM Standards subscriptions are annual and access is unlimited concurrency based (number of people that can access the subscription at any given time) from single office location. For pricing on multiple office location ASTM Standards Subscriptions, please contact us at info@madcad.com or +1 800.798.9296.
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About ASTMASTM International, formerly known as the American Society for Testing and Materials (ASTM), is a globally recognized leader in the development and delivery of international voluntary consensus standards. Today, some 12,000 ASTM standards are used around the world to improve product quality, enhance safety, facilitate market access and trade, and build consumer confidence. ASTM’s leadership in international standards development is driven by the contributions of its members: more than 30,000 of the world’s top technical experts and business professionals representing 150 countries. Working in an open and transparent process and using ASTM’s advanced electronic infrastructure, ASTM members deliver the test methods, specifications, guides, and practices that support industries and governments worldwide. |
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