ASTM A 981/A981M : 2011 : R2016

1.1This test method describes procedures to establish the relative bond strength of 0.600-in. [15.24-mm] diameter, Grade 270 [1860] steel prestressing strand in cement grout as used in prestressed ground anchors for the purpose of evaluating the effects of manufacturing practices on bond strength.

1.2The bond strength values obtained are not intended to be used to design the bond length of ground anchors that depend on field conditions.

1.3This test method is not intended to be used as a bond test for prestressed concrete applications.

1.4The values stated in either inch-pound or SI units are to be regarded as standard. Within the text, the SI units are shown in brackets. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard.

1.5This standard does not purport to address all of the safety concerns, if any, associated with its use. 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.