6 Apr 1This FOP is based on ASTM C and has been modified per WSDOT standards. To view the redline modifications, contact the. WSDOT. ASTM Cpdf – Download as PDF File .pdf), Text File .txt) or read online. Qty. Model, Description. 1, Choose One: HH, Humboldt concrete rebound hammer. H, Standard concrete test hammer, type n. HLM, Light.

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If more than one instrument is to be used, perform comparative tests on a range of typical concrete surfaces so as to determine the magnitude of astm c805 differences astn be expected in the readings of different instruments.

ASTM C – 97 Standard Test Method for Rebound Number of Hardened Concrete NO_PDF

Therefore, tests should be made with the same instrument in order to compare results. Select test locations so that a astm c805 range of rebound numbers in the structure is obtained.

It astm c805 the responsibility of the user of this standard to establish appropriate safety and health astm c805 and determine the applicability of regulatory limitations prior to use. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Historical Version s – view previous versions of standard.

If the rebound number if affected by the orientation of the instrument during testing, the strength relationship is applicable for the same orientation astm c805 used to obtain the correlation date see Note 3. Combining values from astm c805 two systems may result in non-conformance with the standard.

astm c805 To use this test method to estimate strength, it is necessary to establish a relationship between strength and rebound number for a given concrete and given apparatus see Note 1.

C8055 functionality of the rebound hammer shall have been astm c805 in accordance with 6. At least two replicate cores shall be taken from at least six locations with different rebound numbers.

Work Item s – proposed revisions of this standard. Note 2 — The use of molded test specimens to develop a correlation may not provide a reliable astm c805 because the surface astm c805 and depth of carbonation of molded specimens are not usually representative of the in-place concrete.

ASTM C Standard

Link to Active This link will always route to the current Active version of the standard. Locations where strengths are astm c805 be estimated using the developed correlation shall have similar surface texture and shall have been exposed to similar conditions as the astm c805 where correlation cores were taken.

Note 3 — The use of correction factors to account for instrument orientation may reduce the reliability of astm c805 estimates if the correlation asm developed for a astm c805 orientation than used for testing. These factors need to be considered astm c805 interpreting rebound numbers. Establish the relationship by correlating rebound numbers measured on the structure with the measured strengths of cores taken from corresponding locations asfm Note 2.

Note 1 — See ACI Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.