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2021 | OriginalPaper | Chapter

Influence of Sand on the Behavior of Buffer Material Used for the Nuclear Waste Disposal

Authors : Padavala Hari Krishna, Adla Nandini

Published in: Advances in Sustainable Construction and Resource Management

Publisher: Springer Singapore

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Abstract

Clay–sand mixtures are being planned for use as buffer materials for high-level nuclear waste disposal. These mixtures are attracting greater attention as buffer materials because they offer properties of low volumetric shrinkage and high swelling. The influence of sand on the behavior of clay–sand mixtures was investigated by many researchers through a series of laboratory experiments. The study illustrates the role of coarser fraction in controlling swelling and shrinkage of clay–sand mixtures. In the present study, experiments were conducted using oedometer tests to investigate swelling and shrinkage properties at different sand contents by experimentation. The clay–sand mixtures were prepared with sand contents of 0%, 10%, 30%, and 50% by weight of clayey soil. The study showed a decrease in swelling potential and volumetric shrinkage with increase in the amount of sand. An increase in dry unit weight and a decrease in respective moisture content by an increase in the amount of sand were observed in the compaction tests. In addition, attempts were also made to find the influence of varying proportions of coarse sand and fine sand mixtures on swelling and shrinkage properties of these mixtures.

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Metadata
Title
Influence of Sand on the Behavior of Buffer Material Used for the Nuclear Waste Disposal
Authors
Padavala Hari Krishna
Adla Nandini
Copyright Year
2021
Publisher
Springer Singapore
DOI
https://doi.org/10.1007/978-981-16-0077-7_41