Journal Published Online: 08 July 2022
Volume 45, Issue 5

Scalp-and-Replacement of Oversize Particles: Laboratory Permeameter Testing

CODEN: GTJODJ

Abstract

A reanalysis is made of 24 rigid-wall permeameter tests on eight widely-graded sand-gravel mixtures, using empirical methods that post-date the original study by Jones in 1955. The reanalysis is conducted to better understand the consequences of the scalp-and-replacement method of removing oversize particles in laboratory permeameter testing. A necessary requirement of the scalp-and-replacement method is that the porosity, hydraulic conductivity, and susceptibility of the test gradation to internal instability be largely unchanged. The reanalysis provides a framework for such considerations and serves to identify the consequences of excessive scalping such as increased porosity and hydraulic conductivity. The results show that scalp-and-replacement to 35 % of the gradation curve imparts no significant change to the porosity and hydraulic conductivity of an internally stable gradation.

Author Information

Vinoth, Ganapathiraman
Department of Civil Engineering, The University of British Columbia, Vancouver, BC, Canada
Fannin, R. Jonathan
Department of Civil Engineering, The University of British Columbia, Vancouver, BC, Canada
Pages: 7
Price: $25.00
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Details
Stock #: GTJ20210282
ISSN: 0149-6115
DOI: 10.1520/GTJ20210282