TY - GEN
T1 - Influence of phosphate dispersing agents on particle size distribution of soil fines
AU - Kaur, A.
AU - Fanourakis, G. C.
N1 - Publisher Copyright:
© 2016 Australian Geomechanics Society.
PY - 2016
Y1 - 2016
N2 - The particle size distribution of the fine portion of soils is usually determined using sedimentation principles and the hydrometer method. Some hydrometer test methods, such as the South African Standard (SANS3001, 2014) and Guidelines laid by International Soil Reference and Information Centre (ISRIC, 2002) make provision for the effect of the dispersing agent in the solution on readings recorded during the test. Test methods that do not make such provision may be incorrectly yielding inflated fines (including clay) contents. This paper discusses the results of an investigation into the effect of dispersants when applying the TMH1 (1986) test method. The results have been compared using phosphate dispersants such as Calgon, sodium pyrophosphate decahydrate and sodium tetra pyrophosphate in various concentrations. The use of dispersants in higher concentrations produced anomalous increases in the hydrometer readings and the results indicated the importance of understanding the effect of dispersants on the fine soil particle size distribution analyses.
AB - The particle size distribution of the fine portion of soils is usually determined using sedimentation principles and the hydrometer method. Some hydrometer test methods, such as the South African Standard (SANS3001, 2014) and Guidelines laid by International Soil Reference and Information Centre (ISRIC, 2002) make provision for the effect of the dispersing agent in the solution on readings recorded during the test. Test methods that do not make such provision may be incorrectly yielding inflated fines (including clay) contents. This paper discusses the results of an investigation into the effect of dispersants when applying the TMH1 (1986) test method. The results have been compared using phosphate dispersants such as Calgon, sodium pyrophosphate decahydrate and sodium tetra pyrophosphate in various concentrations. The use of dispersants in higher concentrations produced anomalous increases in the hydrometer readings and the results indicated the importance of understanding the effect of dispersants on the fine soil particle size distribution analyses.
UR - http://www.scopus.com/inward/record.url?scp=85015164677&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:85015164677
T3 - Proceedings of the 5th International Conference on Geotechnical and Geophysical Site Characterisation, ISC 2016
SP - 559
EP - 564
BT - Proceedings of the 5th International Conference on Geotechnical and Geophysical Site Characterisation, ISC 2016
A2 - Acosta-Martinez, Hugo E.
A2 - Lehane, Barry M.
A2 - Kelly, Richard
PB - Australian Geomechanics Society
T2 - 5th International Conference on Geotechnical and Geophysical Site Characterisation, ISC 2016
Y2 - 5 September 2016 through 9 September 2016
ER -