EFFECT OF INTRAGRANULAR POROSITY ON COMPACTION

The writer notes some ambiguities in the terms defined and the expression derived in the paper. The term "intragranular porosity, N sub agg" is not defined in the text. Referring to Figure (b), N sub agg equals the volume of intragranular pores over the volume of solids having intragranular pores. The preceding expression is not the definition of porosity but conforms to the definition of void ratio. It is not clear how the formula for minimum dry density for compacted limestone fills has been derived. Though the authors have attempted to correlate the intragranular porosity with maximum dry density, they have not given any method by which the intragranular porosity can be estimated. Billam has suggested a technique for estimating the intragranular porosity, but even this method can be accurate for large intraparticle voids only. The size of intragranular pores can be very small (in the silt to day size range) in calcareous soils and a satisfactory method for estimating their volume is yet to be found. There is a great need for evolving a suitable method because intragranular poere affect the maximum dry density and the crushability of the soil that in turn effects its engineering behavior.

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00196156
  • Record Type: Publication
  • Report/Paper Numbers: ASCE 14599 Proceeding
  • Files: TRIS
  • Created Date: Oct 17 1979 12:00AM