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    Concrete with metal fibers and a cement matrix
    43.
    发明专利
    Concrete with metal fibers and a cement matrix 未知

    公开(公告)号：FR2771406A1

    公开(公告)日：1999-05-28

    申请号：FR9714928

    申请日：1997-11-27

    Applicant: BOUYGUES SA

    Inventor： CHEYREZY MARCEL HUBERT ,  DUGAT JEROME ,  CLAVAUD BERNARD ,  ORANGE GILLES ,  FROUIN LAURENT

    IPC: C04B28/04 ,  C04B14/20 ,  C04B14/48 ,  C04B28/02 ,  C04B111/20 ,  C04B28/00

    Abstract: Concrete consists of a strong cement matrix in which metallic fibers are dispersed. The concrete is obtained by mixing with water a composition comprising: (a) cement; (b) granular components with maximum grain size (D) no more than 2 mm, preferably no more than 1 mm; (c) 'slag' type fillers with particle size no more than 1 microns , preferably no more than 0.5 microns ; (d) components capable of improving the tenacity of the matrix selected from those with average size of no more than 1 mm; and (e) at least one dispersing agent. The concrete meets the following conditions: (f) ratio of water (E) to components (a) and (c) = 8-24 wt.%; (g) fibers have individual lengths (l) of at least 2 mm and l/d ratio (d = diameter) of at least 20; (h) ratio (R) of average fiber length to maximum grain size of granular components = at least 10; and (i) volume of fibers is preferably less than 3.5% volume of concrete. An Independent claim is also included for a pre-mixture for making the concrete.

    45.
    发明专利
    未知

    公开(公告)号：DE69407553D1

    公开(公告)日：1998-02-05

    申请号：DE69407553

    申请日：1994-06-30

    Applicant: BOUYGUES SA

    Inventor： RICHARD PIERRE ,  CHEYREZY MARCEL ,  DUGAT JEROME

    IPC: C04B28/02 ,  C04B14/06 ,  C04B14/48 ,  C04B18/14 ,  C04B28/04 ,  C04B28/18 ,  C04B40/02 ,  C04B111/20

    Abstract: A method and composition for preparing concrete elements comprising the steps of mixing a composition comprising the following components expressed in parts by weight (p): a) 100 p of Portland cement; b) 30 p to 100 p or better 40 p to 70 p of fine sand having a grain size of at least 150 micrometers; c) 10 p to 40 p or better 20 p to 30 p of amorphous silicon having a grain size of less than 0.5 micrometers; d) 20 p to 60 p or better 30 p to 50 p of ground quartz having a grain size of less than 10 micrometers; e) 25 p to 100 p, or better 45 p to 80 p of steel wool; f) a dispersing agent; g) 13 p to 26 p or better 15 p to 22 p of water; and after setting, curing the concrete at a temperature of 250 DEG C. or higher, for a length of time sufficient to transform cement hydration products into crystalline hydrates of the xonotlite type; thus eliminating substantially all of the free water and at least the main part of the adsorbed and chemically bonded water.

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