ASTM C1611/C1611M-21 pdf free download.Standard Test Method for Slump Flow of Self-Consolidating Concrete.
1 .1 This test method covers the determination of slump flow of self-consolidating concrete (SCC).
1.2 The values stated in either SI units or inch-pound units are to he regarded separately as standard. The values stated in each system may not he 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 .3 The text of this standard references notes and footnotes that provide explanatory material. These notes and footnotes (excluding those in tables and figures) shall not be considered as requirements of the standard. (Warning—Fresh hydraulic cementitious mixtures are caustic and may cause chemical burns to skin and tissue upon prolonged exposure).
5. Significance and Use
5.1 This test method provides a procedure to determine the slump flow of self-consolidating concrete in the laboratory or the field.
5.2 This test method is used to monitor the consistency of fresh, unhardcncd self-consolidating concrete and its unconfined flow potential.
5.3 It is difficult to produce self-consolidating concrete that is both flowable and nonsegregating using coarse aggregates larger than 25 mm [1 in.]. Therefore, this test method is considered applicable to self-consolidating concrete having coarse aggregate up to 25 mm [1 in.] in size. Appendix XI provides non-mandatory visual rating criteria that may be used to classify the ability of a self-consolidating concrete mixture to resist segregation (stability).
5.4 The rate at which the concrete spreads is related to its viscosity. Appendix XI provides a non-mandatory procedure that may he used to provide an indication of relative viscosity of self-consolidating concrete mixtures.
6. Apparatus
6.1 Mold—The mold used in this test method shall conform to that described in Test Method Cl43/C143M.
6.2 Base Plate—A nonabsorbent. smooth, rigid plate having a minimum diameter of 9 15 mm [36 in.] (see Note I).
6.3 Strike-off Bar—As described in Test Method C 173/ C173M.
6.4 Measuring Device—A ruler, metal roll-up measuring tape, or similar rigid or semi-rigid measuring instrument marked in increments of 5 mm [1/4 in.] or less.
6.5 Sample Receptacle—A pan or wheelbarrow that is water-tight, has a nonabsorbent surface, and is large enough to allow both remixing of the entire sample and retain a volume of concrete sufficient to fill the mold.
6.6 Other Tools—Items such as shovels and scoops capable of remixing the concrete in the sample receptacle, filling the pouring vessel, or both.
7. Sample
7.1 Obtain a sample of freshly-mixed self-consolidating concrete in accordance with Practice C172/C172M in the field, or Practice C192/C192M in the laboratory, and place it in the sample receptacle.
8. Procedure
8. 1 Perform this test on a flat, level, nonabsorbent work surface such as a concrete floor or base plate.ASTM C1611/C1611M pdf download.