| Evaluation of Different Fly Ash-Blast Furnace Slag
Formulations for Design of Geopolymers in Radioactivity
Disposal Applications |
Ritu Dharmendra Ambashta,1, 2, † Thomas C Alex,3, † Rashmi Singla,3, * Durga Prashanna Sahoo,3
Partha Sarathi Sarkar,1, 2 Rakesh Kumar Bajpai,1, 2 Yelemane Channabasappa Shivakumar,1
Smitha Manohar1 and Sanjay Kumar3
Pages : 178-187
DOI : 10.1080/0371750X.2024.2386521 |
| Abstract |
| Geopolymers in radioactive waste management have in recent times gained
dominance in disposal module acceptance. Here is a comparative study on
formulations prepared from industrial wastes to be utilized as radionuclide disposal
barriers in near surface disposal facilities (NSDFs). Different tools such as
isocalorimetry, compressive strength, chemical durability were utilized for screening
the formulations. Water leaching of the samples shows that the release of the ions to
the leachant is minimal. Durability studies in acids (H2SO4, HCl and HNO3) show that
the samples are mostly acid resistant. X-ray tomography suggests low pore volume
change over a period of 2 years. The study concludes that the NSDF requirement of
low permeability of water and better chemical durability criterion is met by the
optimized geopolymerization formulation.
[Keywords: Compressive strength, Geopolymer, Leaching, Nuclear waste immobilization,
X-ray tomography] |
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