Aspects on Some Problems of Geotechnical Chemistry
Titel:
Aspects on Some Problems of Geotechnical Chemistry
Auteur:
Soderblom, Rolf
Verschenen in:
GFF
Paginering:
Jaargang 81 (1959) nr. 4 pagina's 727-732
Jaar:
1959-12-01
Inhoud:
An examination has been made of the influence of different chemicals on certain natural Swedish clays. It was found that, besides the mineral salts, dispersing agents play an especially important role in the mechanical properties of a clay. An attempt was made to isolate dispersing agents from clays, and it was found that in the cases Investigated the quick clay contained a mixture of sodium-magnesium carbonate, and that these salts together have a strong dispersing effect on certain actual clays. Note added in proof: After the writing of this report further work has given additonal results. Thus it is possible to isolate a peptizing agent from a natural mud desposit by treating it with diluted sodium hydroxide solution. Such a dispersing agent was found in a clay situated below a mud desposit. It was also possible to convert non-peptizable clays in peptizable. A non-peptizable clay was dispersed in MgCl2, CaCl2 or FeCl3, the solution filtered off and the resulting clay tested the resultant properties were different in all three cases. The Mg-clay was not peptizable, the Ca-clay slightly peptizable, and the Fe-clay strongly peptizable. The effect of Fe3+-ions seems to play a very important role, especially in oxidized sulphide clays and also in many Swedish quick clays. Further information will be reported later.
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