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Home > Publications > International Concrete Abstracts Portal
The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.
Title: Optimized Solidification of Mixtures of MSWI Fly Ash and Blast Furnace Slag: Use of the Statistical Design of Experiments
Author(s): S. Morel, P. Clastres, D. Mathieu and A. Pellequer
Publication: Special Publication
Appears on pages(s): 287-306
Keywords: blast furnace slag; fly ash; mechanical strength; optimization.
Abstract:This study proposes a new method for a process development based on specific planning and use of experiments. The ‘Statistical Design Of Experiments’ method comprising the selection of experiments in manner where the results derived from these experiments can be used for the calculation of values to be analysed. Ash produced from the Incineration of Municipal Solid Wastes requires to be solidified and stabilised prior to landfilling. MSWI fly ash is a powdery material. It comprises hydraulic and toxic elements. Ground granulated blast furnace slag is a suitable hydraulic binder to stabilise this ash and MSWI ash can activate the slag hydraulicity. A preliminary study was undertaken on artificial MSWI ash to analyse the influence of the variation of the content of (Ca(OH)2 , CaCIOH, CaS04 ) ash components, while taking into account their interactions effects. It was demonstrated that CaClOH content significantly influences the behaviour of the material. Empirical laws were also developed to determine the mechanical and physical behaviour of mixtures of industrial MSWI ash and slag. The parameters of these models were A/S, W/(A+S), and the water temperature. Then, using the various models developed, an optimum formulation of the MSWI ash and slag mixture was developed, which fulfils the requirements of French Regulations.
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