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    • 1. 发明申请
    • Method for testing setting time of cement-based material
    • 水泥基材料凝固时间测试方法
    • US20140130620A1
    • 2014-05-15
    • US14131748
    • 2011-12-30
    • Qian TianJiaping LiuHang ZhangYujiang WangFei GuoJianye Zhang
    • Qian TianJiaping LiuHang ZhangYujiang WangFei GuoJianye Zhang
    • G01N33/38
    • G01N33/383G01N11/00G01N2013/0208G01N2203/0092
    • Disclosed is a method for testing the setting time of a cement-based material: testing the capillary negative pressure of a non-bleeding cement-based material, with the time at which the capillary negative pressure reaches a threshold value A as the initial setting time, and/or the time at which the capillary negative pressure reaches a threshold value B as the final setting time, wherein threshold value A is 8-10 kPa, and threshold value B is 54-56 kPa. Alternatively, threshold value A and threshold value B are determined by the following method: formulating a cement-based material for the determination of threshold values with the same raw materials at the same formulation ratio; after vibration-compaction, placing a portion into a measuring mold; after vibration-compaction, testing the capillary negative pressure of the non-bleeding cement-based material placed in the measuring mold; under the same conditions, synchronously testing and determining the initial setting time and final setting time of the cement-based material for the determination of threshold values by a penetration resistance method; the capillary negative pressure corresponding to the initial setting time and final setting time of the cement-based material for the determination of threshold values are respectively threshold value A and threshold value B. The method can not only be used in standard tests for a laboratory cement setting time under standard temperature conditions, but can also be used to realize remote, automatic, and continuous in situ monitoring for the setting time of a cast-in-situ concrete structure.
    • 公开了一种用于测试水泥基材料的凝固时间的方法:测试非渗出水泥基材料的毛细管负压,其中毛细管负压达到阈值A的时间为初始凝固时间 ,和/或毛细管负压达到阈值B作为最终凝固时间的时间,其中阈值A为8-10kPa,阈值B为54-56kPa。 或者,通过以下方法确定阈值A和阈值B:配制用于以相同配制比的相同原料测定阈值的水泥基材料; 在振动压实之后,将一部分放置在测量模具中; 振动压实后,测试放置在测量模具中的不渗出水泥基材料的毛细管负压; 在相同条件下,通过渗透阻力法同步测试和确定水泥基材料的初始凝固时间和最终凝固时间,以确定阈值; 用于确定阈值的水泥基材料的初始凝固时间和最终凝固时间的毛细管负压分别为阈值A和阈值B.该方法不仅可用于实验室水泥的标准试验 在标准温度条件下凝固时间,也可用于对现浇混凝土结构的凝固时间进行远程,自动和连续的现场监测。
    • 2. 发明授权
    • Method for testing setting time of cement-based material
    • 水泥基材料凝固时间测试方法
    • US09389216B2
    • 2016-07-12
    • US14131748
    • 2011-12-30
    • Qian TianJiaping LiuHang ZhangYujiang WangFei GuoJianye Zhang
    • Qian TianJiaping LiuHang ZhangYujiang WangFei GuoJianye Zhang
    • G01N33/38G01N11/00G01N13/02
    • G01N33/383G01N11/00G01N2013/0208G01N2203/0092
    • Disclosed is a method for testing the setting time of a cement-based material: testing the capillary negative pressure of a non-bleeding cement-based material, with the time at which the capillary negative pressure reaches a threshold value A as the initial setting time, and/or the time at which the capillary negative pressure reaches a threshold value B as the final setting time, wherein threshold value A is 8-10 kPa, and threshold value B is 54-56 kPa. Alternatively, threshold value A and threshold value B are determined by the following method: formulating a cement-based material for the determination of threshold values with the same raw materials at the same formulation ratio; after vibration-compaction, placing a portion into a measuring mold; after vibration-compaction, testing the capillary negative pressure of the non-bleeding cement-based material placed in the measuring mold; under the same conditions, synchronously testing and determining the initial setting time and final setting time of the cement-based material for the determination of threshold values by a penetration resistance method; the capillary negative pressure corresponding to the initial setting time and final setting time of the cement-based material for the determination of threshold values are respectively threshold value A and threshold value B. The method can not only be used in standard tests for a laboratory cement setting time under standard temperature conditions, but can also be used to realize remote, automatic, and continuous in situ monitoring for the setting time of a cast-in-situ concrete structure.
    • 公开了一种用于测试水泥基材料的凝固时间的方法:测试非渗出水泥基材料的毛细管负压,其中毛细管负压达到阈值A的时间为初始凝固时间 ,和/或毛细管负压达到阈值B作为最终凝固时间的时间,其中阈值A为8-10kPa,阈值B为54-56kPa。 或者,通过以下方法确定阈值A和阈值B:配制用于以相同配制比的相同原料测定阈值的水泥基材料; 在振动压实之后,将一部分放置在测量模具中; 振动压实后,测试放置在测量模具中的不渗出水泥基材料的毛细管负压; 在相同条件下,通过渗透阻力法同步测试和确定水泥基材料的初始凝固时间和最终凝固时间,以确定阈值; 用于确定阈值的水泥基材料的初始凝固时间和最终凝固时间的毛细管负压分别为阈值A和阈值B.该方法不仅可用于实验室水泥的标准试验 在标准温度条件下凝固时间,也可用于对现浇混凝土结构的凝固时间进行远程,自动和连续的现场监测。