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Description of ASTM-C1959/C1959M 2026ASTM C1959/C1959M-26Active Standard: Standard Test Method for Non-Contact Measurement of Resonant Frequencies of Concrete CylindersASTM C1959/C1959MScope 1.1 This is a test method for measuring resonant frequencies of a concrete cylinder by recording the airborne sound emitted by the cylinder after being struck by an impactor. The sound is recorded through the microphone of a smartphone or tablet computer. The recorded sound signal is converted to the frequency domain, and the resonant frequency for a specific mode of vibration is determined from the amplitude spectrum. The measured resonant frequencies can be used to calculate the dynamic Young’s modulus of elasticity as described in Test Methods C215 or E1876. Note 1: The resonant frequencies of cylinders made from a given concrete mixture may be used for estimating to estimate the compressive strength of the cylinders using a pre-established relationship. Guidance about estimating compressive strength based on resonant frequency is provided in Appendix X2. 1.2 References to smartphones or tablet computers in this test method do not preclude the use of other computing devices capable of performing the required data acquisition and processing functions. 1.3 The text of this standard refers to notes and footnotes that provide explanatory material. These notes and footnotes (excluding those in tables and figures) shall not be considered as requirements of the standard. 1.4 The values stated in either SI units or inch-pound units are regarded separately as standard. The values stated in each system are not necessarily exact equivalents; therefore, to ensure conformance with the standard, each system shall be used independently of the other, and values from the two systems shall not be combined. 1.5 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.6 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee. Keywords acoustic resonance; cylinder; frequency analysis; fundamental frequency; impact response; impulse excitation; modes of vibration; nondestructive testing; ICS Code ICS Number Code n/a DOI: 10.1520/C1959_C1959M-26 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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