Building Construction Handbook, Eighth Edition

Silt Test for Sand ~ the object of this test is to ascertain the

cleanliness of sand by establishing the percentage of silt present in

a natural sand since too much silt will weaken the concrete

Obtaining Samples for Laboratory Testing ~ these tests may be

required for checking aggregate grading by means of a sieve test,

checking quality or checking for organic impurities but whatever

the reason the sample must be truly representative of the whole:-

Materials Testing