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.

Mortar and Pestle Porcelain.

Thick walled porcelain mortar; 107mm internal diameter and porcelain pestle.

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Rubber Headed Pestle.

Specially made for gently grinding soils without breaking the individual particles. Suitable for BS 1377, 1924; ASTM D421; AASHTO T87.

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