This test method describes the workability measurement of hydraulic-cement concrete in slip formed paving applications, both in the laboratory and in the field. The values stated in either inch-pound units or SI units are to be regarded separately as the standard. Within the text, the SI units are shown in parentheses. The values stated in each system are not exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in nonconformance with the standard. This standard was formerly designated as provisional method of test TP 137.