ASTM C1383 PDF

This standard is issued under the fixed designation C ; the number 1 This test method is under the jurisdiction of ASTM Committee C-9 on Concrete. Purchase your copy of ASTM C – 15 as a PDF download or hard copy directly from the official BSI Shop. All BSI British Standards available. mm. Thickness Measurement by ASTM C Accurate measurement of thickness requires knowledge of the in-place P- wave speed. ASTM C, “Test .

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The DOCter is a versatile, portable system based on the impact-echo method, and can be used for the asm applications: Olson offers Impact Echo systems for use with three different platforms as shown in the chart below.

It is available on a consulting basis through our sister company, Olson Engineering. A sensitive displacement transducer next to the impact point picks up the disturbance due to the arrival of the P-wave.

You may delete a document from your Alert Ast at any time. The upper plot in this example shows the surface displacement waveform obtained from a test of a solid concrete slab.

The Spider is placed adjacent to the Mark IV transducer as shown in the photo. A short-duration stress pulse is introduced into the member by mechanical impact. This makes the impact-echo method inherently powerful for detecting air interfaces, such as those due to delaminations, cavities, and honeycombed concrete.

The following lists the reflection coefficients of a P-wave travelling through concrete and incident normal to an interface with air, water, soil, or steel: This assumes that the same P-wave speed is applicable at all test points. The peak at All of Olson Instruments have been researched, tested, and used on-site daily by our sister company, Olson Engineeringworld reknowned for NDT consulting.

ASTM C1383 – 15

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.

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The DOCter is a versatile, portable system based on the impact-echo method, and can be used for the following applications:. Lastly, the IE method will provide information on the depth of a flaw or defect, in addition to mapping its lateral location and extent. Thus the P-wave undergoes multiple reflections between the two surfaces. We have no amendments or corrections for this standard.

As the voice of the U. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. Already Subscribed to this document.

The thickness is calculated from this measured frequency and the P-wave speed obtained from Procedure A. Link to Active This link will always route to the current Active version of the standard. These minimum lateral dimensions are necessary to prevent other modes 3 of vibration from interfering with the identification of the thickness mode frequency in the amplitude spectrum.

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.

Example The upper plot in this example shows the surface displacement waveform obtained from a test of a solid concrete slab. No other units of measurement are included in this standard.

Your Alert Profile lists the documents that will be monitored. Detection of Internal Defects The P-wave generated by impact will reflect at interfaces within the concrete where there is a change in acoustic impedancewhich is defined as the product of the density and wave speed of a material. The LONGSHIP transducers are placed on opposite sides of the crack as shown in the sketch to the right and impact is generated on the line passing through the transducers.

ASTM C Standard

If the area of the reflecting interface is large, f1383 impact-echo response will be similar to that of a solid plate except that the thickness frequency will be shifted to the higher value corresponding to the depth of the interface. These drawbacks are eliminated by using the impact-echo method, which requires access to only one surface. The DOCter can also be used to measure the depth of surface-opening asstm, using a time domain analysis. The P-wave generated by impact will reflect at interfaces within the concrete where there is a change in acoustic impedancewhich is defined as the product of the density and wave speed of a material.

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The absolute systematic error depends on the plate thickness, the sampling interval, and the sampling period. The time of arrival of the P-wave at each transducer is determined as the point when the signal for each transducer rises above the background value.

Besides thickness determination and flaw detection, the DOC can be used to estimate the depth of d1383 cracks. Interface Reflection Coefficient Concrete-air The P-wave speed is determined by testing over a solid portion of a plate with known thickness. The same principle applies to reflection from an internal defect delamination or void. Furthermore, it is not possible to determine the depth to asm.

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The distance L mm between the transducers, is divided by time difference t between arrival of the P-wave at asttm second and first transducers. The explanation for this 0.

This standard is also available to be included in Standards Subscriptions. The Viking software allows the user to place cursors at the points corresponding to the P-wave arrivals, and calculates the value of Cp.

Depth of Surface-Opening Cracks The DOCter can also be used to measure the depth of surface-opening cracks, using a time domain analysis. A negative reflection coefficient means that the stress changes asrm when the stress wave is reflected; for example, a compressive stress would be reflected as a tensile stress.

Training may be available at your location by one of our agents upon special arrangement. The following lists the reflection coefficients of a P-wave travelling through concrete and incident normal to an interface with air, water, soil, or steel:.