Edinburgh Napier University

  Brandl (1977) presents the grading curve results of an investigation of particle disintegration of natural sandy gravel and crushed stone bedding courses due to in situ compaction and the action of construction traffic in different civil engineering applications. The work also includes a method to predict the disintegration behaviour of these materials, on the basis of simple laboratory investigations. The concerning compaction are presented in terms of grading curves. The entropy coordinates were computed for the grading curves, before and after compaction. According to the results, the base entropy So, which is a kind of dimensionless mean log diameter, is decreasing during compaction, the entropy increment is increasing according to the entropy principle. Since the grading curve difference and entropy path depend on the grain material and the compaction work, the latter can be characterized if the formers are known