Laboratory engineer II, Texas Department of Transportation, Austin, TX
Laboratory technician III, Texas Department of Transportation, Division of Materials and Tests, Austin, TX
A rolling device was developed in order to obtain plastic limits in a more expeditious and uniform fashion. The device enables the operator to perform the test on four to five specimens simultaneously. It also dictates that the very strict specification for rolling the soil threads into diameters of 3.2 ± 0.5 mm (0.125 ± 0.020 in.) is met. It removes all subjectivity from the plastic limit determination by governing the diameter of the threads as well as removing any error that may be introduced due to the uniqueness of the human hand. The design and operation of the device are detailed in this paper.
Paper ID: GTJ10025J