![]() ![]() Raise the mould from the concrete immediately and slowly in vertical direction.Clean away the mortar or water leaked out between the mould and the base plate.Remove the excess concrete and level the surface with a trowel.For the subsequent layers, the tamping should penetrate into the underlying layer. Tamp each layer with 25 strokes of the rounded end of the tamping rod in a uniform manner over the cross section of the mould.Fill the mould with the prepared concrete mix in 4 approximately equal layers.Place the mould on a smooth horizontal non- porous base plate.Clean the internal surface of the mould and apply oil.The tamping rod is of steel 16 mm diameter and 60cm long and rounded at one end.Ī concrete mix (M15 or other) by weight with suitable water/ cement ratio is prepaid in the laboratory similar to that explained in 5.9 and required for casting 6 cubes after conducting Slump test.įigure-1: Measuring Slump of Concrete Procedure for Concrete Slump Cone Test The mold for the test is in the form of the frustum of a cone having height 30 cm, bottom diameter 20 cm and top diameter 10 cm. slump cone, non porous base plate, measuring scale, temping rod. Time since mixing of concrete at the time of testing.Įquipments Required for Concrete Slump Test.The amount of free water in the concrete, and.Sampling of concrete, slump-testing technique and the condition of test equipment,.Concrete batching, mixing and transporting methods and equipment,.Chemical admixtures dosage, type, combination, interaction, sequence of addition and its effectiveness,.Material properties like chemistry, fineness, particle size distribution, moistureĬontent and temperature of cementitious materials. Size, texture, combined grading, cleanliness and moisture content of the aggregates,.Equipments Required for Concrete Slump Testįactors which influence the concrete slump test:.Factors which influence the concrete slump test:. ![]()
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