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    Method for new concrete from old concrete
    3.
    发明授权
    Method for new concrete from old concrete 失效
    旧混凝土新混凝土的方法

    公开(公告)号：US06231663B1

    公开(公告)日：2001-05-15

    申请号：US09641133

    申请日：2000-08-16

    申请人： Robert L. Catterton ,  Tony H. Harris

    发明人： Robert L. Catterton ,  Tony H. Harris

    IPC分类号： C04B1804

    CPC分类号： C04B28/02 ,  Y02W30/92 ,  Y02W30/95 ,  Y02W30/96 ,  C04B18/08 ,  C04B18/16 ,  C04B18/18 ,  C04B20/0076

    摘要： A method is described for making concrete mixture by blending new batch cement and fly ash with recycled concrete material (curb & gutter, sidewalk, brick, block, asphalt & various other concrete items). This new process will enable discarded concrete materials to be reused as a valuable product.

    摘要翻译： 描述了通过将新的批量水泥和飞灰与回收的混凝土材料（路缘石，沟槽，人行道，砖，块，沥青和各种其他具体物品）混合来制备混凝土混合物的方法。 这个新工艺将使废弃的混凝土材料被重新使用作为有价值的产品。

    Carbon removal through partial carbon burn-out from coal ash used in concrete
    5.
    发明授权
    Carbon removal through partial carbon burn-out from coal ash used in concrete 有权

    公开(公告)号：US06783585B2

    公开(公告)日：2004-08-31

    申请号：US10272671

    申请日：2002-10-15

    申请人： Philip Souza Zacarias ,  David Bridson Oates

    发明人： Philip Souza Zacarias ,  David Bridson Oates

    IPC分类号： C04B1804

    CPC分类号： C04B28/02 ,  C04B18/08 ,  C04B2111/1087 ,  Y02W30/92 ,  Y10S106/01 ,  C04B20/04 ,  C04B18/06 ,  C04B2103/304

    摘要： Concrete's durability to freeze-thaw cycles is dependent on its level of air entrainment, the appropriate level of which is achieved with the aid of surface active or air entraining agents. These agents promote the fragmentation of large air voids into smaller ones and stabilize air voids in the concrete. The carbon matter found in fly ash when used as a pozzolanic component of concrete, adsorbs the air entraining agents, reduces the air voids and concrete's ability to withstand many freeze-thaw cycles. This invention teaches a process for a partial removal of the carbon from the coal ash, used in concrete, through a partial combustion of only a fine carbon fraction of the carbon residue of the coal ash responsible for adsorbing the air entraining agents, in a reactor with a controlled ignition system. The process of the invention thus limits the adsorption of the air entraining agents and improves the freeze-thaw properties of the concrete produced.