This Pakistan Standard specifies a method for determining the slump of fresh concrete both in the laboratory and in the field.
The method is applicable to plastic and cohesive concrete. It is not applicable when the maximum size of aggregate is greater than 40 mm. (nominal 1-1/2")
PS 1638-1984 history
1984PS 1638-1984 SPECIFICATION FOR FRESH CONCRETE—DETERMINATION OF THE CONSISTENCY—SLUMP TEST