Geotechnical Assessment of Compacted Sand Bentonite Mixtures to be Utilized in Underground Nuclear Waste Repositories and Barrier Design

AKGÜN H., Ada M., Kockar M. K.

TEKNIK DERGI, cilt.27, sa.3, ss.7477-7496, 2016 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 27 Sayı: 3
  • Basım Tarihi: 2016
  • Dergi Adı: TEKNIK DERGI
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, TR DİZİN (ULAKBİM)
  • Sayfa Sayıları: ss.7477-7496
  • Anahtar Kelimeler: Sand bentonite mixture, nuclear waste disposal, barrier design, HYDRAULIC CONDUCTIVITY, SWELLING CHARACTERISTICS, CLAY, PERMEABILITY, PERFORMANCE, DISPOSAL, BACKFILL, LINERS, PLUGS
  • Hacettepe Üniversitesi Adresli: Hayır

Özet

This study assesses the mechanical and hydrological performance of compacted sand bentonite mixtures to be utilized in sealing underground nuclear waste repositories. In order to assess the performance of this material and to obtain an optimum sand bentonite mixture, a variety of laboratory tests, namely, compaction, falling head permeability, swelling, unconfined compression and shear strength tests were performed on sand bentonite mixtures possessing bentonite contents ranging from 5% to 15%. Sand bentonite barrier design was performed for the optimum seal selected as a function of the axial stress applied to the barrier and barrier length-to-radius ratio (L/a).