Ultra high strength fiber-reinforced cement composition, ultra high strength fiber-reinforced mortar or concrete and ultra high strength cement additives
    1.
    发明申请
    Ultra high strength fiber-reinforced cement composition, ultra high strength fiber-reinforced mortar or concrete and ultra high strength cement additives 有权
    超高强度纤维增强水泥组合物,超高强度纤维增强砂浆或混凝土和超高强度水泥添加剂

    公开(公告)号:US20090071378A1

    公开(公告)日:2009-03-19

    申请号:US11918626

    申请日:2006-03-30

    IPC分类号: C04B14/48

    摘要: Therefore, the problem to be solved by the present invention is to provide highly general purpose ultra high strength fiber-reinforced mortar or concrete that shows a higher fluidity (workability) at the fresh state, a higher bending strength with a less content of metal fiber by enhancing both the absolute value of the compressive strength of mortar -matrix excluding metal fiber and the ratio of the bending strength relative to the compressive strength simultaneously at the hardened state, and acceptability of fine aggregate being used in ordinary ready-mixed concrete. An ultra high strength fiber-reinforced cement composition is characterized in that it contains cement, silica fume, coal gasification fly ash, gypsum and metal fiber and that the mass ratio of silica fume : coal gasification fly ash is 95 through 50 portions: 5 through 50 portions. Ultra high strength fiber-reinforced mortar or concrete contains such a cement composition and fine aggregate. An ultra high strength cement additives is characterized in that it contains silica fume, coal gasification fly ash and gypsum as principal ingredients and the mass ratio of silica fume: coal gasification fly ash is 95 through 50 portions: 5 through 50 portions.

    摘要翻译: 因此,本发明要解决的问题是提供高通用超高强度纤维增强砂浆或混凝土,其在新鲜状态下具有较高的流动性(可加工性),较高的弯曲强度,较少的金属纤维含量 通过在硬化状态下同时提高砂浆基质的抗压强度的绝对值,同时提高硬化状态下的抗压强度与抗压强度的比值,以及普通的预拌混凝土中使用的细骨料的可接受性。 超高强度纤维增强水泥组合物的特征在于含有水泥,硅灰,煤气化飞灰,石膏和金属纤维,硅灰质量比:煤气化飞灰为95〜50份:5〜 50份。 超高强度纤维增强砂浆或混凝土含有这种水泥组合物和细骨料。 超高强度水泥添加剂的特征在于含有硅灰,煤气化粉煤灰和石膏作为主要成分,硅灰质量比:煤气化飞灰为95〜50份:5〜50份。

    Method of supplying electric current to prestressed concrete
    4.
    发明授权
    Method of supplying electric current to prestressed concrete 有权
    向预应力混凝土供电的方法

    公开(公告)号:US06524465B1

    公开(公告)日:2003-02-25

    申请号:US09763859

    申请日:2001-02-28

    IPC分类号: C04B4100

    摘要: A method of electrochemical treatment of prestressed concrete which comprises supplying a direct current between a steel embedded in the prestressed concrete as a cathode and an anode on the surface or inside of the concrete at a voltage higher than the hydrogen evolution potential, wherein an effective tensile force acting on the PC steel tendon embedded in the concrete is not greater than 80 % of the tensile strength of the PC steel tendon, and a method of electrochemical treatment of prestressed concrete which comprises supplying a direct current between a steel tendon embedded in the prestressed concrete as a cathode and an anode on the surface or inside of the concrete at a voltage higher than the hydrogen evolution potential, wherein the voltage is adjusted to less than the hydrogen evolution potential at least once during electrochemical treatment.

    摘要翻译: 一种预应力混凝土的电化学处理方法,包括在嵌入在预应力混凝土中的钢作为阴极,在混凝土表面或内部以高于析氢电位的电压提供直流电流,其中有效拉伸 作用在混凝土中的PC钢筋的力不大于PC钢筋的抗拉强度的80%,以及预应力混凝土的电化学处理方法,包括在嵌入在预应力钢筋中的钢筋之间提供直流电 混凝土作为阴极和阳极,在高于析氢电位的电压下在混凝土的表面或内部,其中在电化学处理期间将电压调节至小于析氢电位至少一次。