Evaluating Bond Strength for 0.600-in. Diameter Steel Prestressing Strand, Grade 270, Uncoated, Used in Prestressed Ground Anchors
ASTM A981/A981M
This 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.
RJ Peterman & Associates has conducted ASTM A981 pullout tests on strands from 4 different manufacturing plants. Furthermore, we have conducted this test for both strand manufacturing plants and a ground anchor installation contrator.
We have also utilized this test methodology to determine the difference in bond that can occur when utilizing different sources of cement (including Type IL Cement) and the use of water-reducing admixtures.
