BS 1377-4:1990 PDF

What is BS 1377-4 - Soils for civil engineering purposes about? BS 1377-4  on soils for civil engineering purposes describes methods of test for determining characteristics related to the compaction of soils, which can be used as a basis for specifying requirements for soils compacted in the field. BS 1377-4  also includes a method for assessing an empirical strength criterion (the CBR value) of a compacted or undisturbed soil used as a sub-grade material for pavement construction. Reference is made to some of the classification tests described in BS 1377-2 and to BS 1377-1 for general requirements that are relevant to all parts of this standard, and for methods of preliminary preparation of soil for testing. What does BS 1377-4 -   Soils for civil engineering purposes  cover ? The following methods of test have been  included in this edition of BS 1377-4 on   soils for civil engineering purposes:

Determination of the maximum and minimum densities of granular soils Determination of the moisture condition value Determination of the chalk crushing value

In the dry density/moisture relationship tests, and the California Bearing Ratio (CBR) test, sample preparation procedures have been set out in more detail than before, with explanatory flow diagrams.