ASTM C1170/C1170M-20 PDF Download

The ASTM C1170/C1170M-20 standard is a test method used to determine the consistency and density of roller-compacted concrete using a vibrating table. This test method is specifically designed for stiff to extremely dry concrete mixtures commonly used in roller-compacted concrete construction.

To accommodate the unique consistency of roller-compacted concrete, the standard Vebe test method, which involves rodding the specimen in a slump cone, is replaced by Procedures A and B. Procedure A uses a 22.7 kg (50 lb) surcharge and is suitable for very stiff to extremely dry concrete. Procedure B uses a 12.5 kg (27.5 lb) surcharge and is used for stiff to very stiff concrete, but not extremely dry.

The standard is applicable to freshly mixed concrete with a nominal maximum size aggregate of 50 mm (2 in.) or less. If the aggregate size is larger, the test method can still be used by performing the test on the fraction passing the 50-mm (2-in.) sieve, after removing the larger aggregate in accordance with Practice C172.

While primarily intended for roller-compacted concrete, this test method may also be applicable to other types of concrete, such as cement-treated aggregate and mixtures similar to soil-cement.

It is important to note that the standard includes explanatory notes and footnotes, which provide additional information and clarification. However, these notes and footnotes (excluding those in tables and figures) do not constitute requirements of the standard.