The reduction of particles within the soil mass is necessary for a number of tests. For most purposes crushing of individual particles must be avoided. This reduction process is best achieved using a porcelain mortar and rubber headed pestle.
Thick walled porcelain mortar; 107mm internal diameter and porcelain pestle. ...
Specially made for gently grinding soils without breaking the individual particles. Suitable for BS 1377, 1924; ASTM D421; AASHTO T87. ...
