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Experimental study on alinite ecocement clinker preparation from municipal solid waste incineration fly ash

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Abstract

This paper presents the laboratory scale study on the preparation of ecocement clinkers, whose main mineral is alinite, from municipal solid waste incineration fly ash. X-ray diffraction technique was used to monitor the phase formation during the burning of raw mixes. Effects of compositions, firing time and firing temperature on the properties of clinkers have been investigated. The hydration behaviour of the ecocement obtained from the optimized clinkers was also studied. From the results it is observed that the characteristics of the clinkers are strongly dependent on the raw mix compositions and firing temperature but not so much on firing time. The desirable clinkers can be obtained by firing the raw mix at 1,200°C for 1 h and controlling the compositional parameters KH (lime saturation moduli) around 1.02, a (silica-alumina ratio) around 4.50, Cl (Chlorides content) around 7.6% and m (MgO content) around 1.40%. Results also show that the ecocement exhibit a faster hydration kinetics than Ordinary Portland Cement.

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Acknowledgments

The authors acknowledge the financial support of the National High-tech R&D Program (863 Program) (2006AA06Z363) of China, the National Natural Science Foundation of China (51172164), and Special research funding for public benefit industries from National Ministry of Environmental Protection of the People’s Republic of China (201209026).

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Authors and Affiliations

  1. Key Laboratory of Advanced Civil Engineering Materials (Tongji University), Ministry of Education, 4800 Caoan Road, Shanghai, 201804, China

    Kai Wu, Huisheng Shi & Xiaolu Guo

  2. Department of Structural Engineering, Magnel Laboratory for Concrete Research, Ghent University, Technologiepark-Zwijinaarde 904, Ghent, 9052, Belgium

    Kai Wu & Geert De Schutter

  3. Microlab, Faculty of Civil Engineering and Geosciences, Delft University of Technology, Stevinweg 1, 2628 CN, Delft, The Netherlands

    Guang Ye

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  1. Kai Wu
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  2. Huisheng Shi
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  3. Geert De Schutter
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  4. Xiaolu Guo
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  5. Guang Ye
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Correspondence to Huisheng Shi.

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Wu, K., Shi, H., De Schutter, G. et al. Experimental study on alinite ecocement clinker preparation from municipal solid waste incineration fly ash. Mater Struct 45, 1145–1153 (2012). https://doi.org/10.1617/s11527-012-9822-5

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  • DOI: https://doi.org/10.1617/s11527-012-9822-5

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