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Influence of granule properties and concentration on cork-cement compatibility

Einfluss der Eigenschaften und des Anteils von Korkgranulat auf die Kork-Zement-Kompatibilität

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Abstract

Cork granules are produced as by-products and waste by the cork processing industries that make ‘bottle stoppers’ as a main product. These granules are of low density and could be used as lightweight aggregates for making concrete. This paper describes an investigation carried out to assess the compatibility of cork granules with cement for the manufacture of lightweight cementitious composites. Five different grades of cork granules varying in terms of size and density were investigated. The effects of extractives, particle size and density of the cork granules were studied. The results indicate that these parameters affect cement hydration in a complex way. At lower concentrations of cork (10%), only the extractives have an influence on hydration behaviour. At higher cork concentrations (20% and 30%), however, particle size and density also affect the compatibility. Nevertheless, cork granules are found to be compatible with cement.

Zusammenfassung

Korkgranulat entsteht in der korkverarbeitenden Industrie als Neben- und Abfallprodukt bei der Herstellung von Flaschenkorken. Korkgranulat hat eine geringe Dichte und könnte als Leichtzuschlagstoff für die Herstellung von Beton verwendet werden. In diesem Artikel werden die Ergebnisse einer Untersuchung zur Beurteilung der Kompatibilität von Korkgranulat und Zement zur Herstellung von zementgebundenen Verbundwerkstoffen vorgestellt. Unter Verwendung von fünf Korkgranulatarten unterschiedlicher Grösse und Dichte wurde die Wirkung von Extraktstoffen, der Partikelgrösse und der Dichte untersucht. Es zeigte sich, dass sich diese Parameter in komplexer Weise auf die Zementhydration auswirken. Bei geringem Korkanteil (10%) wirken sich nur die Extraktstoffe auf das Hydrationsverhalten aus. Bei höheren Korkanteilen (20 und 30%) beeinflussen jedoch auch die Partikelgrösse und die Dichte die Kompatibilität. Insgesamt gesehen erwies sich Korkgranulat als mit Zement kompatibel.

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Authors and Affiliations

  1. OBM Division, Central Building Research Institute, Roorkee, 247667, India

    Sukhdeo R. Karade

  2. Ecole Supérieure du Bois, B.P. 10605, Rue Christian Pauc, 44306, Nantes Cedex 3, France

    Mark Irle

  3. Forest Products Research Centre, Buckinghamshire Chilterns University College, High Wycombe, Buckinghamshire, HP11 2JZ, UK

    Kevin Maher

Authors
  1. Sukhdeo R. Karade
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  2. Mark Irle
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  3. Kevin Maher
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Correspondence to Mark Irle.

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Karade, S., Irle, M. & Maher, K. Influence of granule properties and concentration on cork-cement compatibility. Holz Roh Werkst 64, 281–286 (2006). https://doi.org/10.1007/s00107-006-0103-2

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