石膏粉的凝结时间分为初凝时间及终凝时间。前者是在标准稠度的用水量下，石膏粉与水拌合直到混合料浆失去流动性开始变稠时所经过的时间；后者是在标准稠度用水量下，石膏粉与水拌合到混合料浆固化时所经过的时间。那么如何检测其石膏粉的凝结时间？石膏粉生产厂家带大家来了解一下。

　　The setting time of gypsum powder is divided into initial setting time and final setting time. The former refers to the time elapsed when gypsum powder is mixed with water at a standard consistency of water until the mixture loses its fluidity and begins to thicken; The latter refers to the time it takes for gypsum powder and water to solidify when mixed with water at standard consistency. So how to detect the setting time of its gypsum powder? Gypsum powder manufacturers will take you to learn more.

　　要知道合适的凝结时间是石膏粉生产时能否正常使用的重要因素。其初凝时间过短或者终凝时间过长都会影响正常生产。所以事先检测石膏粉的凝结时间是非常有必要的。

　　It should be noted that the appropriate setting time is an important factor in the normal use of gypsum powder during production. If the initial setting time is too short or the final setting time is too long, it will affect normal production. So it is very necessary to check the setting time of gypsum powder in advance.

　　通常检测石膏粉凝结时间的方法有划痕法、维卡仪法两种。其中划痕法是使用比较普遍的一种检测方法。其步骤如下：

　　There are usually two methods for detecting the setting time of gypsum powder: scratch method and Vicat apparatus method. The scratch method is a commonly used detection method. The steps are as follows:

　　1、将100毫升水倒入500毫升容器中，再将石膏粉试样在1分钟之内均匀的撒在水中，静置30秒后，快速搅拌30秒，之后把石膏浆体倒入放置在在表面擦匀麻油的玻璃板上的铜管内，之后慢慢垂直向上提起铜管到20毫米处，让石膏浆体平铺成直径100毫米-120毫米，厚度在5毫米的试饼。

　　1. Pour 100 milliliters of water into a 500 milliliter container, then evenly sprinkle the gypsum powder sample in the water within 1 minute, let it stand for 30 seconds, quickly stir for 30 seconds, and then pour the gypsum slurry into a copper tube placed on a glass plate with evenly brushed sesame oil on the surface. Slowly lift the copper tube vertically up to 20 millimeters, and let the gypsum slurry spread evenly into a test cake with a diameter of 100-120 millimeters and a thickness of 5 millimeters.

　　2、用5毫米直径的玻璃棒每隔30秒划割1次，且每次划后需用软布将玻璃棒擦拭干净。一直到划痕两边的料浆不再合拢时即为初凝。其初凝时间通常从石膏粉撒入水中开始算起，直到不再合拢。

　　2. Use a 5mm diameter glass rod to cut every 30 seconds, and wipe the glass rod clean with a soft cloth after each cut. The initial setting is when the slurry on both sides of the scratch no longer closes. The initial setting time is usually calculated from the moment gypsum powder is sprinkled into water until it no longer closes.

　　3、测定初凝后的试饼上用大拇指每隔10秒按压1次，当按压到印痕边缘没有水分出现即为终凝。其终凝时间通常由石膏粉撒入水中开始算起，直到边缘没有水分结束。

　　3. Press the test cake with your thumb every 10 seconds after initial setting. When no moisture appears at the edge of the imprint, it is considered final setting. The final setting time is usually calculated from the moment gypsum powder is sprinkled into water until there is no moisture at the edge.

　　本文由  济南石膏粉  友情奉献.更多有关的知识请点击  https://www.jnfhjc.com/   真诚的态度.为您提供为全面的服务.更多有关的知识我们将会陆续向大家奉献.敬请期待.

　　This article is a friendly contribution from Jinan gypsum powder For more related knowledge, please click https://www.jnfhjc.com/ Sincere attitude To provide you with comprehensive services We will gradually contribute more relevant knowledge to everyone Coming soon.