Tafraoui Ahmed

Publications (2)0 Total impact

• Article: Valorization of the Sand of Dune of the Western Erg (Algeria) in the Formulation of the UHPC

  Tafraoui Ahmed, Lebaili Soltane
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  ABSTRACT: The present study deals with the use and the valorization of the sand of dune of the Western erg of the western south of Algeria in the development of the formulation of the Concretes with ultra high performance UHPC. Mainly, if we think that meadows of 6% of the surface of the Algerian Sahara are covered by its sands.
  Journal of Applied Sciences. 01/2006;
• Article: Design of Tools for Stamping in Reactive Powder Concrete for Thin Sheets

  Tafraoui Ahmed, Lebaili Soltane
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  ABSTRACT: We proposed to produce tools for stamping out of reactive powder concrete which substitutes the resin concrete tools covered with a resin with cast (freezing-coat) for the prototype parts (< 100 parts), in order to decrease the deadlines, to simplify the manufacturing process and to reduce the costs in the automobile body. A bench of abrasive wear was developed to determine the dynamic coefficient of friction concrete/metal sheet. We could show that the fact of not using any product of dismantling makes it possible to have a smooth surface, without any bubble on the working surface of the tool. This study showed that the tools for stamping in reactive powder concrete are an interesting alternative to the realization of small series and that this technique can apply already to the realization of prototype parts (< 100 units).
  Journal of Applied Sciences. 01/2006;