What are the factors influencing the setting speed of gypsum powder?

有熟石膏粉的质量、熟石膏粉与水调合的比例不当、搅拌的时间和速度、水温。

There are the quality of gypsum powder, improper proportion of gypsum powder and water, mixing time and speed, and water temperature.

熟石膏操作注意： 1.石膏粉与水调合后，若发现水粉比例不合适时，应重取量调和。 2.搅拌的速度不宜过快，以免人为带入气泡，形成过多的结晶，导致石膏膨胀，强度降低。 3.灌注模型时应从一侧逐渐到另一侧，震荡灌注，排除气泡，注满各细微部分。 4. 石膏在凝固过程中存在体积膨胀。

Notes for plaster of Paris operation: 1 After mixing gypsum powder with water, if the proportion of water powder is found to be inappropriate, it shall be re measured and mixed. 2. the mixing speed should not be too fast, so as to avoid artificially bringing in bubbles and forming too many crystals, resulting in gypsum expansion and strength reduction. 3. pour the model gradually from one side to the other side, vibrate and pour, eliminate bubbles, and fill each fine part. 4. there is volume expansion of gypsum during solidification.

不过让石膏凝固速度降慢的方法是在把石膏粉加水的时候使用温度较低的凉水 水越凉凝固速度就越慢 反之用热水就会很快。 是根本不用参任何东西的。如果觉得这个办法不行还可以加入柠檬酸或者先在石膏粉里掺好腻子粉，在水里掺上108胶白乳胶和纤维素，再调和。石膏的凝固时间一般取决与石膏粉的标号标号高的一般就凝结的快。

However, the way to slow down the setting speed of gypsum is to use cold water with lower temperature when adding water to gypsum powder. The cooler the water is, the slower the setting speed will be. On the contrary, using hot water will be very fast. There is no need to participate in anything at all. If you think this method is not feasible, you can also add citric acid or add putty powder into gypsum powder, add 108 glue white emulsion and cellulose into water, and then mix. The setting time of gypsum generally depends on the grade of gypsum powder. High grade generally sets fast.

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The wonderful contents of this article are provided by Jinan gypsum powder. There are many wonderful contents on this website. You can click to enter more contents: https://www.jnfhjc.com We have special customer service to answer your questions