نوع مقاله : یادداشت فنی
نویسندگان
1 دانشکدهی فنی و مهندسی، دانشگاه بوعلیسینا، همدان
2 دانشگاه آزاد اسلامی واحد همدان
چکیده
کلیدواژهها
عنوان مقاله [English]
نویسندگان [English]
Bentonite is commonly used as a buffer material in high level nuclear waste (HLW) repositories due to its swelling and water adsorption properties. The stability of the engineering and rheological properties of bentonite is an essential factor in radioactive waste disposal projects. Such a change in properties might occur, due to the high temperature in HLW repositories. In spite of much research conducted on the stability of mechanical properties of bentonite, there has not been enough attention paid to the temperature impact on the stability of these properties. Therefore, the main objective of this paper is to focus attention on the stability of the engineering and rheological properties of bentonite, due to temperature variations in radioactive waste disposal. To achieve this objective, a series of mechanical and geo-environmental experiments were performed. These include Atterberg limit testing, suction experiments, XRD, viscosity measurement, and the swelling experiment. These experiments were performed after curing samples under different temperature conditions. The smectite soil used in this research was provided by the Iran Barit Company. The engineering analyses were conducted using the procedures described in the laboratory manual of the Geotechnical Research Center of McGill University and in the manual of EPA. The experimental results of this paper show that an increase in temperature will change the initial properties of bentonite. These changes mainly occur if the temperature goes above 100 C
کلیدواژهها [English]
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