Skip to main content
Log in

Sintered coal ash/flux materials for building materials

  • Published:
Materials and Structures Aims and scope Submit manuscript

Abstract

An Illinois coal ash, which has metals and a large amount of iron, is considered to be an especially difficult waster for disposal. In the process described in this paper, the high iron and metal content is used to create a building material with special properties. The metals are sequestered. The metals allow a process that creates valueadded products, building materials.

The products are inexpensively prepared colored, strong, lightweight insulative structural panels. By either sintering in an oven at 725°C or by adding a flux and sintering at 525°C, panels are produced which will not leach metals from the ash. The use of an acid with the fly ash as a flux was investigated in comparison with fly ash control samples. The effects of sintering samples at different temperatures and with or without vacuum were also observed. Properties of the samples, including values for strength, water absorption, insulation, and color, are presented from this study.

Résumé

Une cendre de charbon de l'Illinois, qui a des métaux et une grande quantité de fer, est considérée comme un déchet particulièrement difficile à éliminer. Dans le processus décrit par cette étude, la teneur élevée en fer et en métal est utilisée pour créer un matériau de construction avec des propriétés spéciales. Les métaux sont isolés. Les métaux permettent un processus qui crée de la valeur ajoutée.

Les produits sont des panneaux structuraux isolés, colorés, forts et légers qui sont préparés à peu de frais. On produit des panneaux qui ne lixivieront pas les métaux de la cendre par une concrétion dans un four à 725 degrés Celsius, ou bien par une concrétion à 525 degrés Celsius, en ajoutant un flux. L'utilisation d'un acide avec la cendre en l'air comme flux a été étudiée en comparaison avec des échantillons témoins de cendres flottantes dans l'air. On a également observé les effets de concrétionnement des échantillons à différentes températures avec ou sans vide. Les propriétés des échantillons, y compris les indices pour la solidité, l'absorption de l'eau, l'isolation, et la couleur, sont présentées dans cette étude.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Similar content being viewed by others

References

  1. Valenti, M., ‘Using fly ash for construction,’Mechanical Engineering 117 (5) (1995) 82–86.

    Google Scholar 

  2. Wei, L., Naik, T.R. and Golden, D.M., ‘Construction materials made with coal combustion by-products’,Cement, Concrete and Aggregates 16 (1) (1994) 36–42.

    Article  Google Scholar 

  3. Beretka, J., Cioffi, R., Santoro, L. and Valenti, G., ‘Cementitious mixtures containing industrial process wastes suitable for the manufacture of preformed building elements’,Journal of Chemical Technology and Biotechnology 59 (3) (1994) 243–247.

    Article  Google Scholar 

  4. Askhedkar, R.D. and Modak, J.P., ‘Hypothesis for the extrusion of lime-fly ash-sand bricks using a manually driven brickmaking machine’,Building Research and Information 22 (1) (1994) 47–54.

    Google Scholar 

  5. Sevelius, D., ‘Bricks by recycling-product design based on waste’,Key Engineering Materials 132–136 (3) (1997) 2272–2275.

    Article  Google Scholar 

  6. Freidin, K. and Erell, E., ‘Bricks made of coal fly ash and slag, cured in open air’,Cement & Concrete Composites 17 (4) (1995) 289–300.

    Article  Google Scholar 

  7. Yildirim, M.S., Bicer, Y. and Yildiz, C., ‘Utilization of fly ash and polypropylene wastes in the production of a new porous composite material’,Journal of Porous Materials 3 (3) (1996) 189–191.

    Article  Google Scholar 

  8. Alkan, C., Arslan, M., Cici, M., Kaya, M. and Aksoy, M., ‘Study on the production of a new material from fly ash and polyethylene’,Resources Conservation & Recycling 13 (3–4) (1995) 147–154.

    Article  Google Scholar 

  9. Li, Y., White, D.J. and Peyton, R.L., ‘Composite material from fly ash and post-consumer PET’,Resources Conservation & Recycling 24 (2) (1998) 87–93.

    Article  Google Scholar 

  10. Joshi, R.C., Thomas, J.O. and Adam, R.B., ‘Properties of gypsum wallboards containing fly ash’,Journal of Materials in Civil Engineering 4 (2) (1992) 212–225.

    Google Scholar 

  11. Dry, C., ‘Characterization of two sintered fly ash/acid composites’,Canadian Ceramics Quarterly/Journal of the Canadian Ceramic Society 63 (1) (1994) 54–58.

    Google Scholar 

Download references

Author information

Authors and Affiliations

Authors

Rights and permissions

Reprints and permissions

About this article

Cite this article

Dry, C., Meier, J. & Bukowski, J. Sintered coal ash/flux materials for building materials. Mat. Struct. 37, 114–121 (2004). https://doi.org/10.1007/BF02486607

Download citation

  • Received:

  • Accepted:

  • Issue Date:

  • DOI: https://doi.org/10.1007/BF02486607

Keywords

Navigation