ASTM C1419-14(R2020) pdf free download

ASTM C1419-14(R2020) pdf free download.Standard Test Method for Sonic Velocity in Refractory Materials at Room Temperature and Its Use in Obtaining an Approximate Young’s Modulus
1. Scope
1.1 This test method describes a procedure for measuring the sonic velocity in refractory materials at room temperature. The sonic velocity can be used to obtain an approximate value for Young’s modulus. 1.2 The sonic velocity may be measured through the length, thickness, and width of the specimen. 1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 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 appro- priate safety, health, and environmental practices and deter- mine the applicability ofregulatory limitations prior to use. 1.5 This international standard was developed in accor- dance with internationally recognized principles on standard- ization established in the Decision on Principles for the Development of International Standards, Guides and Recom- mendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
3. Terminology
3.1 Definitions ofTerms Specific to This Standard: 3.1.1 longitudinal sonic pulse, n—a sonic pulse in which the displacements are in the direction of propagation of the pulse. 3.1.2 pulse travel time, (T t ), n—the total time, measured in microseconds, required for the sonic pulse to traverse the specimen being tested, and for the associated electronic signals to traverse the circuits of the pulse propagation circuitry. 3.1.3 zero time, (T o ), n—the travel time (correction factor), measured in microseconds, associated with the electronic circuits in the pulse-propagation system.
4. Summary of Test Method
4.1 The velocity of sound waves passing through the test specimen is determined by measuring the distance through the specimen and dividing by the time lapse between the transmit- ted pulse and the received pulse. 3,4 An approximate value for Young’s modulus can be obtained as follow.
7. Test Specimen
7.1 Specimens may be prisms of any desired length with parallel smooth surfaces. Opposite surfaces across the length, width, and thickness shall be parallel. The smallest dimension shall be greater than five times the diameter of the largest aggregate in the refractory. The surface on which the transduc- ers will be located must have a width of at least 1.5 times the diameter of the transducer being used. 7.2 Dry the specimens in an oven at 110 °C for a minimum of5 h. Cool to room temperature. Test for sonic velocity within 5 h of drying. 7.3 Measurement ofDensity and Dimensions—Calculate the density of the specimens by Test Methods C134 and determine the specimen lengths by either Test Methods C134 or C179.
8. Procedure
8.1 Assemble and connect the apparatus as shown in Fig. 1 and refer to the equipment manufacturer’s instructions for hook-up precautions. If using commercially available equip- ment designed to measure sonic velocity, refer to the manu- facturer’s set-up and operating instructions. Allow adequate time for the test apparatus to warm up and stabilize. 8.2 Provide a suitable coupling medium on the transducer faces. N OTE 1—Petroleum jelly or grease couple well but may be difficult to remove for subsequent tests on the same specimen.8.3 Bring the transducer faces into intimate contact, but do not exceed the manufacturer’s recommended contact pressure. 8.4 Determine T o , the zero time (zero correction) measured in microseconds associated with the electronic circuits in the pulse-propagation instrument and coupling. Alternately, if a commercially available apparatus is used which utilizes a zero offset and a supplied calibration standard, the instrument can be zeroed using the standard and T o does not have to be determined or used in the final calculation. 8.5 Measure and weigh and calculate the density of the test specimen as in 7.3. 8.6 Lightly coat the faces ofthe test specimen that will be in contact with the transducers with the coupling medium. Posi- tion the transducers on opposite surfaces so that they provide a mirror image and that the distance between the input transducer and the output transducer is equal to the dimension through which the measurement is performed. Place the transducers against the test specimen. Apply firm pressure until the pulse travel time stabilizes.