AASHTO T119:2013 Standard Method of Test for Slump of Hydraulic Cement Concrete.
4.1. This test method is intended to provide the user with a procedure to determine the slump of plastic hydraulic cement concretes.
Note 1 -This test method was originally developed to provide a technique to monitor the consistency of unhardened concrete. Under laboratory conditions, with strict control of all concrete materials, the slump is generally found to increase proportionally with the water content of a given concrete mixture and thus to be inversely related to concrete strength. Under field conditions, however, such a strength relationship is not clearly and consistently shown. Care should therefore be taken in relating slump results obtained under field conditions to strength.
4.2. This test method is considered applicable to plastic concrete having coarse aggregate up to
37.5 mm [1.5 in.]. If the coarse aggregate is larger than 37.5 mm [1.5 in.] in size, the test method is applicable when it is performed on the fraction of concrete passing a 37.5-mm [1.5-in.] sieve, with the larger aggregate being removed in accordance with the section titled “Additional Procedures for Large Maximum Size Aggregate Concrete” in R 60.
4.3. This test method is not considered applicable to nonpiastic and noncohesive concrete. Note 2—Concretes having slumps less than 15 mm [0.5 in.] may not be adequately plastic and concretes having slumps greater than about 230 mm [9 in.] may not be adequately cohesive for this test to have significance. Caution should be exercised in interpreting such results.
5.1. Mold—The test specimen shall be formed in a mold made of metal not readily attacked by the cement paste. The metal shall not be thinner than 1.5 mm [0.060 in.] and, if formed by the spinning process, there shall be no point on the mold at which the thickness is less than 1.15 mm [0.045 in.]. The mold shall be in the form of the lateral surface of the frustum of a cone with the base 203 mm [8 in.] in diameter, the top 102 mm [4 in.] in diameter, and the height 305 mm [12 in.]. Individual diameters and heights shall be within ±3.2 mm [0.125 in.] of the prescribed dimensions. The base and the top shall be open and parallel to each other and at right angles to the axis of the cone. The mold shall be provided with foot pieces and handles similar to those shown in Figure 1. The mold shall be constructed without a seam. The interior of the mold shall be relatively smooth and free from projections. A mold that clamps to a nonabsorbent base plate is acceptable instead of the one illustrated, provided the clamping arrangement is such that it can be fully released without movement of the mold and the base is large enough to contain all of the slumped concrete in an acceptable test.AASHTO T119 pdf download.