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以往常用维卡仪测定水泥凝结时间,使用这种仪器时,事先在搅拌容器内搅拌好材料,然后倒入试模中,这一过程需要较长时间,对于加入速凝剂而很快凝结的材料是不适宜的。 维也纳一研究单位开发出一种现代的试验仪器,该仪器与维卡仪一样也是以贯入原理为基础的,它适合于喷混凝土快凝材料凝结时间的试验。
In the past, Vicats were commonly used to determine the setting time of cement. When using this instrument, the material was stirred in a mixing vessel in advance and then poured into a test mold. This process required a long time and was quickly condensed by the addition of a quick-setting agent. Material is not suitable. A research unit in Vienna developed a modern test instrument. The instrument, like Vicat, is based on the penetration principle. It is suitable for the test of the setting time of shotcrete fast setting materials.