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Objective To determine the pulse velocity of propagation of compressional waves in concrete, for ... more Objective To determine the pulse velocity of propagation of compressional waves in concrete, for the purpose of comparatively determining the condition of concrete. Reference ASTM Designation : C 597 Apparatus A set of Portable Ultrasonic Non-destructive Digital Indicating Tester (PUNDIT) (a) Pulse Generator Circuit and Transducer (b) Receiving Circuit and Transducer (c) Time Measuring Circuit and Display Unit Significance and Use 1. This method covers the determination of the pulse velocity of propagation of compressional waves in concrete. For the purpose of comparatively determining the condition of the concrete. This method can also be used to advantage to access the uniformity of field concrete, to indicate changes in characteristics in concrete, and in the survey of field structures to estimate the severity of deterioration, cracking or both. 2. The results obtained by the use of this method should not be considered as a means of measuring strength nor as an adequate test for establishing the compliance of the modulus of elasticity of the field concrete with that assumed in design. The procedure is applicable in both field and laboratory testing regardless of size or shape of the specimen, within the limitations of available pulse energy sources. 3. The method concerns itself with the measurement of the velocity to propagation of groups of compressional waves in concrete and does not apply to the propagation of other vibrations within the material. The pulse velocity is independent of the dimension of the body provided that reflected waves from boundaries do not complicate the determination of the arrival time of the directly transmitted pulse.
Objective To determine the pulse velocity of propagation of compressional waves in concrete, for ... more Objective To determine the pulse velocity of propagation of compressional waves in concrete, for the purpose of comparatively determining the condition of concrete. Reference ASTM Designation : C 597 Apparatus A set of Portable Ultrasonic Non-destructive Digital Indicating Tester (PUNDIT) (a) Pulse Generator Circuit and Transducer (b) Receiving Circuit and Transducer (c) Time Measuring Circuit and Display Unit Significance and Use 1. This method covers the determination of the pulse velocity of propagation of compressional waves in concrete. For the purpose of comparatively determining the condition of the concrete. This method can also be used to advantage to access the uniformity of field concrete, to indicate changes in characteristics in concrete, and in the survey of field structures to estimate the severity of deterioration, cracking or both. 2. The results obtained by the use of this method should not be considered as a means of measuring strength nor as an adequate test for establishing the compliance of the modulus of elasticity of the field concrete with that assumed in design. The procedure is applicable in both field and laboratory testing regardless of size or shape of the specimen, within the limitations of available pulse energy sources. 3. The method concerns itself with the measurement of the velocity to propagation of groups of compressional waves in concrete and does not apply to the propagation of other vibrations within the material. The pulse velocity is independent of the dimension of the body provided that reflected waves from boundaries do not complicate the determination of the arrival time of the directly transmitted pulse.