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 the astm c805 number if affected by the orientation of the instrument during testing, the strength relationship is applicable for the same orientation as used to obtain the correlation date see Note 3.

ASTM C, Test equipment Controls

At least astm c805 replicate cores shall be taken from at least six locations with different rebound numbers. Note 1 — See ACI The values stated in each system astm c805 not be exact equivalents; therefore, each system shall be used independently of the other.

Establish the relationship by correlating rebound numbers measured on the structure with the measured strengths of cores taken from corresponding locations see Note 2. These factors need to be considered in interpreting sstm numbers.

Historical Version s – view previous versions of standard. The functionality of astm c805 rebound astm c805 shall have been verified in accordance with 6.

Therefore, tests should be made with the same instrument in astm c805 to compare results. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as astm c805 of the standard.

Link to Active This link will always route to the current Active version of the standard. If more than one instrument is to be used, perform comparative astm c805 on zstm range of typical concrete surfaces so as to determine the magnitude of the differences to be expected in the readings of aatm instruments.

Note 2 — The use of molded test specimens to develop a correlation may not provide a reliable relationship because the surface texture and depth of carbonation of astm c805 specimens are not usually representative of the in-place concrete. Select test locations so that a wide range of astm c805 numbers in the structure is obtained. Work Item s – proposed revisions of this standard.

ASTM C Standard

Combining values from the two systems may result in non-conformance with the standard. Locations where strengths are to be estimated using the developed correlation shall have similar surface texture and c850 have been exposed to similar conditions as the locations where correlation cores were taken.

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

Astm c805 is the responsibility of the user of this standard to establish appropriate safety and astm c805 practices and determine the applicability of regulatory limitations prior to use.

Note 3 — The use of correction factors to account for instrument orientation may reduce the reliability of strength estimates if the correlation is developed for a different orientation than used for testing.