On shaking the basin gently we can differentiate the clay preparations moved for which the water content was above a certain limit. The water content at which two halves could just be caused to contact was called by him as flow limit. In the second method the bodies were rolled out into threads at successively lower water contents until they started to grumble.
The lowest water content at which continuous threads could still be made was termed by Atterberg the Rolling limit. If the difference between the flow limit and the rolling limit is greater then the clay or the clay body is termed as more plastic. This method does not tell us the most suitable water content for preparation of clay body, however it gives a good idea for the range of plasticity.
To be contd………….
