Immobilization of low and intermediate level of organic radioactive wastes in cement matrices
| Autor: | M.I. Sayed, S.B. Eskander, Hamdy El-Didamony, S.M. Abdel Aziz |
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| Rok vydání: | 2011 |
| Předmět: |
Thermogravimetric analysis
Environmental Engineering Absorption of water Materials science Construction Materials Health Toxicology and Mutagenesis Composite number Mineralogy Microstructure Pollution Refuse Disposal Compressive strength Chemical engineering Differential thermal analysis Radioactive Waste Freezing Environmental Chemistry Clay Scintillation Counting Frost (temperature) Aluminum Silicates Organic Chemicals Porosity Waste Management and Disposal |
| Zdroj: | Journal of hazardous materials. 190(1-3) |
| ISSN: | 1873-3336 |
| Popis: | The adequacy of cement-clay composite, for solidification/stabilization of organic radioactive spent liquid scintillator wastes and its resistance to frost attack were determined by a freezing/thawing (F/T) test. Frost resistance is assessed for the candidate cement-clay composite after 75 cycles of freezing and thawing by evaluating their mass durability index, compressive strength, apparent porosity, volume of open pores, water absorption, and bulk density. Infrared (IR), X-ray diffraction (XRD), differential thermal analysis (DTA), thermal gravimetric analysis (TGA) and scanning electron microscopy (SEM) were performed for the final waste form (FWF) before and after the F/T treatment to follow the changes that may take place in its microstructure during the hydration regime. The results were obtained indicate that the candidate composite exhibits acceptable resistance to freeze/thaw treatment and has adequate suitability to solidify and stabilize organic radioactive spent liquid scintillator wastes even at very exaggerating conditions (-50°C and +60°C). |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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