DISCUSSION THE BENTONITE TUNNELLING MACHINE
The bentonite tunnelling machine J V BARTLETT A R BIGGART 8t R L TRIGGS Mr J V Bartlett The bentonite tunnelling machine was a complex example of systems engineering however much one may dislike the term The substitution of an industrial process for a skilled craft does not always meet with approval but in this case the soft
Geochemical characteristics and mapping of Reşadiye Tokat
Bentonite is a group of clays that are produced when volcanic glass or minerals like mica feldspar olivine augite and hornblende in pyroclastic and volcanic rocks undergo hydrothermal alteration or diagenetic weathering Kadir et al 2021 and references therein The minerals known as bentonite clay namely kaolinite/smectite illite and montmorillonite have