Proposed procedure for identification of dispersive soils by chemical testing : : technical paper

Abstract

Dispersion influences the erodibility of soils as well as the susceptibility to piping of earth embankments. Although the causes and consequences of dispersion are well understood, the identification of dispersive soils remains a problem. Various physical and physico-chemical methods of identification have been proposed by different authors, but none have been entirely successful. The main objective of this paper is to evaluate the methods currently used for the determination of the dispersiveness of a soil and to single out a procedure that could be applied with confidence for the identification of dispersive soils. Dispersie beinvloed die erodeerbaarheid van grond, asook die stabiliteit van grondwalle. Alhoewel die oorsake en gevolge van die verskynsel goed begryp word, is positiewe identifikasie nog 'n probleem. Verskeie fisiese en fisies-chemiese metodes is deur verskillende outeurs voorgestel. Tot op hede egter was nog nie een van hierdie metodes heeltemal aanvaarbaar nie. Die belangrikste doelwit van hierdie navorsing was om die verskillende metodes wat gebruik word, te evalueer en om 'n metode daar te stel waarmee die dispersiepotensiaal met 'n groot mate van sekerheid geidentifiseer kan word.