
TOPICS
1/ Methods of production of cement-waste forms
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Performance requirements and implementation methods
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Formulation for various kinds of wastes (metallic wastes, ashes, spent sorbents including ion exchange resins and zeolites, coprecipitation sludges, evaporator concentrates and other saline solutions, organic-containing wastes)
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Formulation methodologies
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Processes involved: mixing device designs, packaging options ; engineering feasibility and implementation in real site
2/ Physico-chemical processes occurring in cement-waste forms at early age
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Cement-waste interactions
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Factors influencing rheology, setting, hardening, hydration rate, heat production, pH and pore solution evolution
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Evolution of mineralogy and microstructure
3/ Emerging and alternative cementitious systems
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Low pH cements
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Calcium aluminate and sulfoaluminate cements
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Geopolymers
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Phosphate cements (magnesium, calcium…)
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Interactions between new binders and conventional construction materials NEW !
4/ Influence of internal factors on long-term properties of cement-waste packages
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Waste / cement / aggregate interactions
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Differed ettringite formation
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Effect of bg and a irradiation: radiolytic gas production, stability of cement hydrates and admixtures
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Corrosion of metallic waste
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Gas evacuation
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Micro and macro-cracking
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Chemo-mechanical modelling NEW !
5/ Influence of external factors on long term properties of cement-waste packages and cement barriers
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Leaching by aggressive solutions (chloride, sulfate…), carbonation
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Effect of temperature
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Redox state evolution
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Radionuclides retention
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Liquid, gas, and contaminant transport under unsaturated or saturated conditions
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Interactions with other cement barriers
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Modelling of long-term behavior - saturated versus unsaturated transport
6/ Monitoring of cemented waste packages and cement barriers NEW !
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Monitoring techniques, remote monitoring, potential of robotics for monitoring condition of waste packages and waste forms
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Methods for detecting and quantifying concrete contamination
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Methodology for service life extrapolation
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Methods for reworking non-compliant cement waste forms