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487462e4f8 The tool typically has an internal diameter of 100 millimetres (3.9in) at the top and of 200 millimetres (7.9in) at the bottom with a height of 305 millimetres (12.0in).The cone is placed on a hard non-absorbent surfaceMckay; J.MSo all these parameters should be kept in mind when deciding the ideal slump Ques: 2 How does a super plasticizer effect the slump of concrete? Answer: 2 Value of Slump can be increased by the addition of chemical admixtures like mid-range or high-range water reducing agents (super-plasticizers) without changing the water/cement ratioIi (Fourth Edition)An increase in slump may mean, for instance, that the moisture content of aggregate has unexpectedly increasesJune 2010Due to this fact, it has been widely used for workability tests since 1922^ W.B
It is limited to concrete formed of aggregates of less than 38mm (1.5inch).United States In the United States, engineers use the ASTM standards and AASHTO specifications when referring to the concrete slump testFigure-3: Types of Concrete Slump Test Results^ "California Test 555, Method of Test for Slump of Fresh Portland Cement Concrete" (PDF)When the slump test is carried out, following are the shape of the concrete slump that can be observed:concrete mix is too wet or it is a high workability mix, for which a slump test is not appropriate.Shear Slump The shear slump indicates that the result is incomplete, and concrete to be retestedOR If one-half of the cone slides down an inclined plane, the slump is said to be a shear slumpButterworth-HeinemannRetrieved 2010-12-11ISBN0-419-14860-4