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 ! 

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

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