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1CSTB, 84 avenue Jean Jaurès, Champs sur Marne, 77421 Marne la Vallée cedex 2, France
2ENS de Cachan, 61 avenue du Président Wilson, 94235 Cachan Cedex, France
3BFRL NIST, 100 Bureau Drive Stop 8621, Gaithersburg MD 20899-8621, USA
This work falls within the scope of a general problem regarding the assessment of concrete manufactured from waste materials. The main objective is to study the long-term evolution of these materials during the leaching process, using the cellular automaton based hydration model developed at the National Institute of Standards and Technology. The work is based on the analysis of mortars and cement pastes containing experimental waste: Municipal Solid Waste Incineration fly ash (MSWI fly ash). The study therefore aims to develop a methodology for assessing concrete manufactured from waste, and not to study a process or a formulation enabling the incorporation of the waste in concrete. The physical, chemical and mineralogical characteristics of MSWI fly ash were first analysed to introduce them into the model. A simplified quantitative mineralogical composition of the ash was proposed. The performance characteristics (setting times, compressive strengths, shrinkage, etc.) for mortars containing ash were then studied.
Keywords: Fly ash; Characterization; Hydation products; Waste management