Quick binder for self compacting concrete, use and application of same
    32.
    发明授权
    Quick binder for self compacting concrete, use and application of same 失效
    快速粘合剂用于自密实混凝土,使用和应用

    公开(公告)号:US07029527B2

    公开(公告)日:2006-04-18

    申请号:US10311865

    申请日:2001-06-19

    IPC分类号: C04B28/04 C04B24/00

    摘要: A binder for self-compacting concrete includes, in dry weight of the-binder, 70 to 90% of Portland cement, 4 to 16% of calcium aluminate, 4 to 14% of calcium sulphate, an accelerator and a retarder, 0 to 2% of Ca(OH)2 and at least an additive with a water reducer. The calcium sulphate is in the form of anhydrite and the water reducer has at least a superplasticizer consisting of a water soluble or water dispersible organic compound, having at least an amino-di(alkylene-phosphonic) group and at least a polyoxyalkylated chain or at least one of its salts.

    摘要翻译: 用于自密实混凝土的粘合剂包括粘合剂的干重为70〜90%的波特兰水泥,4〜16%的铝酸钙,4〜14%的硫酸钙,加速剂和缓凝剂,0〜2 %的Ca(OH)2和至少一种具有减水剂的添加剂。 硫酸钙是无水石膏的形式,并且减水剂具有至少一种由水溶性或水分散性有机化合物组成的超增塑剂,其具有至少一个氨基 - 二(亚烷基 - 膦酸)基团和至少一个聚氧烷基化链或在 至少一种盐。

    Method for monitoring thixotropy in concrete mixing drum
    40.
    发明授权
    Method for monitoring thixotropy in concrete mixing drum 有权
    监测混凝土搅拌筒触变性的方法

    公开(公告)号:US08764272B2

    公开(公告)日:2014-07-01

    申请号:US12933947

    申请日:2008-04-07

    摘要: The invention provides ‘thixotropy’ monitoring, by measuring the reversible, time-dependent reduction in viscosity occurring when concrete is subjected to mixing, and employs a mixing drum and conventional slump monitoring equipment as used on ready-mix trucks. In one embodiment, the drum is rotated until concrete is completely mixed; the speed is altered, such as by increasing it to a predetermined level; and the energy required to rotate the drum (ER) is monitored; the maximum (ER-MAX) and minimum (ER-MIN) values are recorded in computer memory; and these values are compared to pre-determined (target) values. Rheology factors (including viscosity, yield stress, and/or thixotropy) can be adjusted accordingly by adding liquid component(s) into the mix. This method, suitable for delivery of highly fluid concrete speed such as SCC, can involve transit and placement rheology targets during monitoring.

    摘要翻译: 本发明通过测量当混凝土混合时发生的粘度的可逆的时间依赖性降低,并采用混合罐和常规坍落度监测设备(如混合动力车上使用)来提供“触变性”监测。 在一个实施例中,滚筒旋转直到混凝土完全混合; 速度被改变,例如通过将其增加到预定水平; 并监测旋转鼓(ER)所需的能量; 最大(ER-MAX)和最小(ER-MIN)值被记录在计算机存储器中; 并将这些值与预定(目标)值进行比较。 流变因子(包括粘度,屈服应力和/或触变性)可以通过向混合物中加入液体组分来进行调节。 适用于输送高流体混凝土速度(如SCC)的方法可以在监测过程中涉及运输和放置流变目标。