لخّصلي

Place the mixing pan on the floor and moisten it with some water.If, in the repeat test also, the specimen shears, the slump should be measured and the fact that the specimen sheared, should be recorded.After the concrete stabilizes, measure the slump-height by turning the slump cone upside down next to the sample, placing the tamping rod on the slump cone and measuring the distance from the rod to the original displaced center.Any slump specimen, which collapses or shears off laterally gives incorrect result and if this occurs, the test should be repeated with another sample.Remove excess concrete from the opening of the slump cone by using tamping rod in a rolling motion until flat.The slump measured should be recorded in mm of subsidence of the specimen during the test.Firmly hold the slump cone in place using the 2 foot holds.46.

Place the mixing pan on the floor and moisten it with some water. Make sure it is damp but no free water is left. The internal surface of the mould is thoroughly cleaned and applied with a light coat
of oil. Firmly hold the slump cone in place using the 2 foot holds.
46. Fill one-third of the cone with the concrete mixture. Then tamp the layer 25 times using the steel rod in a circular motion, making sure not to stir. Add more concrete mixture to the two-thirds mark. Repeat tamping for 25 times
again. Tamp just barely into the previous layer. Fill up the whole cone up to the top with some excess concrete coming out of top,
then repeat tamping 25 times. (If there is not enough concrete from tamping compression, stop tamping, add more, then continue tamping at previous number). Remove excess concrete from the opening of the slump cone by using tamping rod in a rolling motion until flat. Slowly and carefully remove the cone by lifting it vertically (5 seconds +/- 2 seconds), making sure that the concrete sample does not move. Wait for the concrete mixture as it slowly slumps. After the concrete stabilizes, measure the slump-height by turning the slump cone upside down next to the sample, placing the tamping rod on the slump cone and
measuring the distance from the rod to the original displaced center. The slump measured should be recorded in mm of subsidence of the specimen during
the test. Any slump specimen, which collapses or shears off laterally gives incorrect result and if this occurs, the test should be repeated with another sample. If, in the
repeat test also, the specimen shears, the slump should be measured and the fact that the specimen sheared, should be recorded.