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    Aluminate-enhanced type I Portland cements with short setting times and cement boards produced therefrom
    113.
    发明授权
    Aluminate-enhanced type I Portland cements with short setting times and cement boards produced therefrom 有权

    公开(公告)号：US11180412B2

    公开(公告)日：2021-11-23

    申请号：US16801083

    申请日：2020-02-25

    Applicant: UNITED STATES GYPSUM COMPANY

    Inventor： Qinghua Li ,  Yanfei Peng

    IPC: C04B7/19 ,  C04B7/42 ,  C04B14/06 ,  C04B14/10 ,  C04B14/20 ,  C04B14/28 ,  C04B14/36 ,  C04B18/08

    Abstract: Aqueous cementitious slurries including predominantly Type I Portland cement containing an aluminate additive. The aluminate additive is an aluminate salt other than calcium aluminate or calcium sulfoaluminate, preferably sodium aluminate. Cementitious reactive powders of the slurry include the Type I Portland cement and 0.1-10 wt. % of the aluminate additive as an accelerator. The slurries may have a set time of about 10 minutes or less. Due to the short set time, the cementitious reactive powders may facilitate cement board fabrication by continuous manufacturing processes. Methods for making cement boards may include disposing the aqueous cementitious slurry including the cementitious reactive powders in a continuous layer, preferably upon a porous support, and setting the aqueous cementitious slurry with a set time of about 10 minutes or less.

    COMPOSITE GYPSUM BOARD FORMED FROM HIGH-SALT STUCCO AND RELATED METHODS
    117.
    发明申请
    COMPOSITE GYPSUM BOARD FORMED FROM HIGH-SALT STUCCO AND RELATED METHODS 有权

    公开(公告)号：US20210198148A1

    公开(公告)日：2021-07-01

    申请号：US16904779

    申请日：2020-06-18

    Applicant: United States Gypsum Company

    Inventor： Qinghua Li ,  Mark K. Hemphill ,  Brian J. Christ ,  Curtis B. Loring

    IPC: C04B28/14 ,  B32B13/08 ,  B32B43/00 ,  B32B38/00

    Abstract: Disclosed are a composite gypsum board and a method of preparing gypsum board. The board contains at least one set gypsum layer sandwiched between face and back cover sheets. The set gypsum layer is formed from at least stucco and water. The stucco material generally includes a high salt impurity content, for example, when the stucco is calcined from certain sources of low-quality synthetic gypsum. For example, in some embodiments, the salts are chloride salts, e.g., sodium chloride (NaCl), potassium chloride (KCl), magnesium chloride (MgCl2), and/or calcium chloride (CaCl2). The board and methods improve the bond between the gypsum layer(s) and at least one of the cover sheets (e.g., the back cover sheet). Also provided are methods and systems relating to drying gypsum board.

    Wallboard score, snap and edge appearance test procedure
    118.
    发明授权
    Wallboard score, snap and edge appearance test procedure 有权

    公开(公告)号：US11029139B2

    公开(公告)日：2021-06-08

    申请号：US16375670

    申请日：2019-04-04

    Applicant: UNITED STATES GYPSUM COMPANY

    Inventor： Jerry D. Wonderlich ,  John A. Koch ,  Charles W. Cochran ,  Tim Lucas ,  Jenner Omodt

    IPC: G01B5/28 ,  B26F3/00 ,  G01B5/14

    Abstract: A procedure is provided for evaluating the score, snap and edge appearance of wallboard panels, and includes scoring a wallboard panel with a knife at a constant and known force using a benchtop board scoring device; snapping the scored panel in a Universal Board Testing Machine to measure the breaking force, forming a snapped panel edge; measuring a cleanliness of the snapped panel edge by placing a straight edge against the snapped panel edge and measuring gaps between the snapped panel edge and the straight edge in a plurality of locations on a face of the panel, and a plurality of locations on a back of the panel; and averaging all of the measured gaps to create an Index Score.

    VARIABLE HEIGHT FILL STATION FOR READY MIXED COMPOSITIONS
    119.
    发明申请
    VARIABLE HEIGHT FILL STATION FOR READY MIXED COMPOSITIONS 有权

    公开(公告)号：US20210114857A1

    公开(公告)日：2021-04-22

    申请号：US16657829

    申请日：2019-10-18

    Applicant: UNITED STATES GYPSUM COMPANY

    Inventor： Brent MILLER ,  Steven A. Harper ,  Roger Tarolli

    IPC: B67C3/26 ,  B65B1/12 ,  B65D88/28

    Abstract: A variable height fill station for filling containers with ready mixed compositions, includes a hopper, a dispensing nozzle in fluid communication with the hopper, an inner tube having a first inner end, and an opposite second inner end, an outer tube having a first outer end telescopingly receiving the second inner end of the inner tube, and an opposite second outer end, a support frame supporting the second outer end, and providing an actuator mounting point, and a linear actuator connected at a work end to the second inner end, and at an opposite end to the support frame, so that linear reciprocation of the actuator moves the inner tube relative to the outer tube, thus adjusting an operational height of the dispensing nozzle.

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