Immobilization of low and intermediate level of organic radioactive wastes in cement matrices

Evaluation of the Properties of Cemented Liquid Scintillator Wastes under Flooding Scenario in Various Aqueous Media

“…Migration of moisture through pore structure of the cement matrix can induce buildup of internal hydraulic pressure, which causes cracking in the composite and consequently can affect negatively on the physicomechanical properties. The refinement of pore structure in the FWF by adding clay leads to reduce the permeability of the hardened cement composite and can dispose retardation in moisture migration through a cement matrix so that physicomechanical properties would be enhanced [19]. Additional changes in the cement structure can occur due to crystallization processes within a pore system by adding clay as admixture leading to enhancement of the physicomechanical properties [20].…”

Dynamic immobilization of simulated radionuclide 133 Cs in soil by thermal treatment/vitrification with nanometallic Ca/CaO composites

“…Cement-based low cost and readily available materials including ordinary Portland cement (OPC), cementepolymer composites and other alternative binding systems are among the most widely used inert binders for the encapsulation of low and intermediate level radioactive wastes (Santanu and Pak, 2006;Evans, 2008;Eskander et al, 2011;Bayoumi, 2009). However, most cement-based materials are porous and relatively easily leached (Malviya and Chaudhary, 2006;Zhou et al, 2006;Ojovan et al, 2011).…”

Effects of gamma-ray irradiation on leaching of simulated 133 Cs + radionuclides from geopolymer wasteforms

“…Safe disposal of these wastes aims to effectively isolate radioactive contamination from the biosphere, normally [4][5][6][7], inert materials are used to retardation of radionuclide mobility during long-term storage and disposal [5,[8][9][10][11][12]. Encapsulation of low-and intermediate-level radioactive wastes via cementation has been performed for many years because of the low cost and readily available materials [10,[13][14][15].…”