This standard specifies the requirements for the equipment used in determining the shrinkage factors of soils, such as shrinkage limit, shrinkage ratio, and volumetric shrinkage. It details the dimensions, materials, and construction of apparatus like the shrinkage dish, glass cup, and pronged glass plate.
equipment for determination of shrinkage factors
Quick Reference Values
Shrinkage dish internal diameter45 mm
Shrinkage dish internal height15 mm
Glass cup internal diameter at top50 mm
Glass cup internal height25 mm
Glass plate with prongs size75 x 75 x 3 mm
Balance sensitivity0.01 g
Practical Notes
The test involves mercury, which is hazardous. All handling must be done with extreme caution in a well-ventilated area following strict safety protocols.
Ensure the inside of the shrinkage dish is smooth and clean to prevent the soil pat from sticking, which would lead to inaccurate results.
The volume of the shrinkage dish must be accurately calibrated before use, as this value is fundamental to all subsequent calculations.