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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Need more than one copy? Example The upper plot in this ast, shows the surface displacement waveform obtained from a test of a solid concrete slab. P-Wave Speed MeasurementThis procedure measures the time it takes for the P-wave generated by a short-duration, point impact to travel between two transducers positioned a known distance apart along the surface of a structure.

ASTM C Standard

Measurement of P-wave Speed The figure is an example of the measurement of P-wave speed by using two transducers a known distance apart. Complete Docter Brochure Docter Publications. Link to Active This link will always route to the current Active version of the standard. These notes and footnotes excluding those in tables and figures shall not be considered as requirements of the standard.

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The recorded waveform of surface displacement has a periodic pattern that is related to the thickness of the member and the wave speed. The DOCter comes in two versions: By positioning the cursor at the frequency associated with the flaw, the flaw depth is shown by the Viking software. The system includes a laptop computer, a data acquisition module, one Mark IV transducer with impactors, and software.

ASTM C1383

Training may be available at your location by one of our agents upon special arrangement. 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 distance L mm between the transducers, is divided by time difference t between arrival of the P-wave at the second and first transducers. The same principle applies to reflection from an internal defect delamination or void. This standard is not included in any packages. It is available on a consulting basis through our sister company, Olson Engineering.

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 P-wave speed is uniform with depth. Thus the correct equation for thickness calculation is: It is the responsibility of the user of this standard to establish appropriate safety and health practices and ast the applicability of regulatory limitations prior to use.

CTG-2 requires Windows Device. All of Olson Instruments have been researched, tested, and used on-site daily by our sister company, Olson Engineeringworld reknowned for NDT consulting. This standard is also available to be included in Standards Subscriptions. Impact Echo IE investigations are performed to assess the condition or thickness of slabs, beams, columns, walls, pavements, runways, tunnels, and dams.

It is seen that at a concrete-air interface, there is complete reflection of the P-wave. Impact-Echo TestThis procedure measures the frequency at which the P-wave generated by a short-duration, point impact is reflected between the parallel opposite surfaces of wstm plate.

Powered by WordPress Theme Designed by: No other units of measurement are included in this standard. C1338 the interface between the concrete and subgrade is rough, the amplitude spectrum will have a rounded peak instead of a adtm peak associated with a flat surface.

Docter | GERMANN

The Spider multiple impactor unit can be purchased qstm an option to increase the operating range of the systems. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as c13383 of the standard.

The figure below the waveform is the amplitude spectrum obtained by transforming the waveform into the frequency domain. The explanation for this 0. 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. The DOCter is a versatile, portable system based on the impact-echo method, and can be used for the following applications:.

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Please first verify your email before subscribing to alerts. Besides thickness determination and flaw detection, the DOC can be used to estimate the depth of surface-opening cracks. The DOCter is a versatile, portable system based on the impact-echo method, and can be used for the following applications: Link to Active This link will always route to the current Active version of the standard.

If test equipment is assembled by the user, thickness limitations shall be established and documented.

A short-duration stress pulse is introduced into the member by mechanical impact. Detection of delaminations and honeycomb in sewer pipe.

If these conditions are not satisfied, the waveform will cc1383 of low amplitude and the asfm spectrum will not include a dominant peak at the frequency corresponding to the thickness Eq 2.

Measure the thickness of pavements, asphalt overlays, slabs-on-ground and walls Detect the presence and depth of voids and honeycombing Detect voids below slabs-on-ground Evaluate the quality of grout injection in post-tensioning cable ducts Integrity of a membrane below an asphalt overlay protecting structural concrete Delamination surveys of bridge decks, piers, cooling towers and 1c383 Detect debonding of overlays and patches Detect ASR damage and freezing-and-thawing damage Measure the depth of surface-opening cracks Estimate early-age strength development with proper correlation Principle A short-duration stress pulse is introduced into the member by mechanical impact.

When the P-wave reaches the back side of the member, it is reflected and travels back to the surface where the impact was generated.