Clay dispersion:

مرکز و کتابخانه مطالعات اسلامی به زبان های اروپایی

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" Clay dispersion: "
M. A. Ijhaish S. C. Cheung

Document Type	:	Latin Dissertation
Language of Document	:	English
Record Number	:	1113119
Doc. No	:	TLpq304090170
Main Entry	:	M. A. Ijhaish
	:	S. C. Cheung
Title & Author	:	Clay dispersion:\ M. A. IjhaishS. C. Cheung
College	:	Concordia University (Canada)
Date	:	1993
student score	:	1993
Degree	:	M.A.Sc.
Page No	:	196
Abstract	:	The long-term performance of clay barriers is of great importance in geo-environmental projects dealing with the disposal of high-level radioactive waste. The main objective of this thesis is to address the long-term performance of clay barrier proposed for use in the Canadian Nuclear Fuel Waste Management Program. To achieve this objective, it is necessary to accomplish two primary objectives. In addition, concepts in clay colloid chemistry of relevance to this study are reviewed. The first primary objective is to study the effect of pore water chemistry on the flocculation/deflocculation of clay particles at clay water interface. This is accomplished experimentally by comparing the results of critical coagulation concentrations and sediment volumes of a 2% bentonite clay suspension in NaCl & CaCl2 and synthetic solutions used in the sedimentation tests. The second primary objective is to study the rate of release of clay particles from the expanding clay in various solutions. This is accomplished by measuring the concentration profiles as a function of time from the expanding clay in various solutions. Results obtained from the above two achieved objectives suggest that the bentonite gel is flocculated and the amount of particles released is insignificant. The unexpected result of no particle release from the gel in the distilled water is attributed to the presence of residual salt in the clay. The results also support the long-term performance of the bentonite clay barrier proposed for use in the Canadian Nuclear Fuel Waste Management Program.
Subject	:	Applied sciences
	:	Civil engineering