TOPICS

1/ Methods of production of cement-waste forms
 

• Performance requirements and implementation methods

• 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)

• Formulation methodologies

• Processes involved: mixing device designs, packaging options ; engineering feasibility and implementation in real site

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2/ Physico-chemical processes occurring in cement-waste forms at early age

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• Cement-waste interactions

• Factors influencing rheology, setting, hardening, hydration rate, heat production, pH and pore solution evolution

• Evolution of mineralogy and microstructure

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3/ Emerging and alternative cementitious systems
 

• Low pH cements

• Calcium aluminate and sulfoaluminate cements

• Geopolymers

• Phosphate cements (magnesium, calcium…)

• 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

• Differed ettringite formation

• Effect of bg and a irradiation: radiolytic gas production, stability of cement hydrates and admixtures

• Corrosion of metallic waste

• Gas evacuation

• Micro and macro-cracking

• Chemo-mechanical modelling NEW ! 

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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 

• Effect of temperature 

• Redox state evolution

• Radionuclides retention 

• Liquid, gas, and contaminant transport under unsaturated or saturated conditions

• Interactions with other cement barriers

• Modelling of long-term behavior - saturated versus unsaturated transport

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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

• Methods for detecting and quantifying concrete contamination

• Methodology for service life extrapolation

• Methods for reworking non-compliant cement waste forms