Standard Consistency Test

The standard consistency of cement is that consistency, which permit the vicat plunger to penetrate to a point 5 to 7mm from the bottom of the vicat mould when tested. Procedure to determine the quantity of water required to produce a cement paste of standard  consistency  is described below. Determination of Standard Consistency of Cement Apparatus for Standard Consistency 1.  Vicat Apparatus The vicat apparatus consists of a frame having a movable rod with a cap at one end and at the other end any one of the following attachment, which are interchangeable: Needle for determining the initial setting time Needle for determining the final setting time Plunger for determining the standard consistency 2.  Needles Needle for Initial Setting Time The needle is having a cross sectional area of 1mm 2 . The end of the needle is flat. Needle for FInal Setting Time The needle is circular having a cross sectional area of 1mm 2 . The needle is fitte...