Compaction and volumetric shrinkage of bentonitic mixtures

ÖREN A. H., Kaya A.

PROCEEDINGS OF THE INSTITUTION OF CIVIL ENGINEERS-GEOTECHNICAL ENGINEERING, cilt.167, sa.1, ss.51-61, 2014 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 167 Sayı: 1
  • Basım Tarihi: 2014
  • Doi Numarası: 10.1680/geng.11.00043
  • Dergi Adı: PROCEEDINGS OF THE INSTITUTION OF CIVIL ENGINEERS-GEOTECHNICAL ENGINEERING
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.51-61
  • Anahtar Kelimeler: geotechnical engineering, landfill, materials technology, NATURAL ZEOLITES, CLAY, DESICCATION, SURFACE, WASTE
  • Dokuz Eylül Üniversitesi Adresli: Evet

Özet

This study presents compaction and volumetric shrinkage results for zeolite-bentonite mixtures and sand-bentonite mixtures in terms of bentonite content, zeolite particle size and mixture type. Based on the results obtained, the zeolite-bentonite mixtures had significantly lower dry unit weights and higher compaction water contents than those of the sand-bentonite mixtures. The volumetric shrinkage strains of bentonitic mixtures changed only slightly up to 30% bentonite content, but increased considerably when 50% bentonite content was used in the mixtures. The effect of zeolite particle size on the volumetric shrinkage of zeolite-bentonite mixtures was also determined. The measurements showed that the zeolite-bentonite mixtures prepared with fine zeolite were able to shrink more than those prepared with granular zeolite. However, there were comparable volumetric shrinkage strains between granular zeolite-bentonite mixtures and sand-bentonite mixtures. Two-way analysis of variance was conducted to evaluate whether zeolite particle size, bentonite content and mixture type have statistically significant effects on the volume shrinkage strains of bentonitic mixtures.