石膏粉是以石膏为主要原料加工而成的一种粉状材料，以下是关于它的相关知识介绍：

Gypsum powder is a powdery material processed from gypsum as the main raw material. The following is an introduction to its related knowledge:

主要成分与分类

Main components and classification

主要成分：主要成分是硫酸钙的水合物，根据所含结晶水的不同，可分为二水石膏、半水石膏和无水石膏。

Main components: The main component is the hydrate of calcium sulfate, which can be divided into dihydrate gypsum, hemihydrate gypsum, and anhydrous gypsum according to the different crystal water contained.

常见分类

Common Categories

建筑石膏粉：通常是半水石膏，由天然二水石膏经过煅烧、磨细而成，颜色一般为白色，也有灰色或其他颜色。

Architectural gypsum powder: usually semi hydrated gypsum, made by calcining and grinding natural dihydrate gypsum, with a color generally white, but also gray or other colors.

模型石膏粉：一般选用纯净的石膏矿石或化学石膏为原料，经过特殊加工制成，具有较高的纯度和细度，颗粒细小均匀，适用于制作各种模型。

Model gypsum powder: Pure gypsum ore or chemical gypsum is generally used as raw materials, which are processed through special methods to produce high purity and fineness, with small and uniform particles, suitable for making various models.

高强石膏粉：是将天然二水石膏在高温高压下蒸煮，脱水生成的 α 型半水石膏，具有较高的强度和硬度。

High strength gypsum powder: It is an alpha type hemihydrate gypsum produced by steaming and dehydrating natural dihydrate gypsum under high temperature and pressure, with high strength and hardness.

粉刷石膏粉：以建筑石膏为主要原料，添加多种添加剂和辅料制成，用于墙面、顶棚等的抹灰和粉刷。

Gypsum powder for plastering: made from building gypsum as the main raw material, with various additives and auxiliary materials added, used for plastering and painting walls, ceilings, etc.

特性

characteristic

凝结硬化快：在加水搅拌后，能在较短时间内凝结硬化，一般初凝结时间在 6 分钟至 30 分钟左右，终凝时间在 30 分钟至 60 分钟左右，方便快速施工。

Fast setting and hardening: After mixing with water, it can set and harden in a relatively short time. Generally, the initial setting time is about 6 minutes to 30 minutes, and the final setting time is about 30 minutes to 60 minutes, which is convenient for rapid construction.

强度较高：硬化后的石膏制品具有一定的强度，高强石膏的强度更高，其抗压强度可达到 25MPa 至 40MPa，能满足不同应用场景的强度要求。

High strength: The hardened gypsum products have a certain strength, and the strength of high-strength gypsum is even higher. Its compressive strength can reach 25MPa to 40MPa, which can meet the strength requirements of different application scenarios.

防火性能好：石膏粉在遇火时，二水石膏中的结晶水会蒸发，吸收大量热量，同时在表面形成一层水蒸气隔膜，阻止火势蔓延，具有良好的防火性能。

Good fire resistance: When gypsum powder encounters fire, the crystalline water in dihydrate gypsum evaporates, absorbing a large amount of heat, and forming a layer of water vapor membrane on the surface to prevent the spread of fire, with good fire resistance.

保温隔热：石膏制品的孔隙率较高，空气在孔隙中不易流动，使其具有较好的保温隔热性能，能有效降低建筑物的能耗。

Thermal insulation: Gypsum products have a high porosity, making it difficult for air to flow through the pores, which gives them good thermal insulation performance and can effectively reduce the energy consumption of buildings.

吸音性能佳：石膏板等石膏制品能够吸收和反射声音，减少声音的传播，可用于对隔音要求较高的场所，如会议室、录音室等。

Excellent sound absorption performance: Gypsum products such as gypsum boards can absorb and reflect sound, reducing the propagation of sound, and can be used in places with high requirements for sound insulation, such as conference rooms, recording studios, etc.

装饰性好：具有良好的可塑性，可制成各种形状和图案的装饰构件，表面光滑细腻，能满足不同的装饰需求。

Good decorative properties: It has good plasticity and can be made into various shapes and patterns of decorative components. The surface is smooth and delicate, which can meet different decorative needs.

环保无毒：主要成分是天然石膏或化学石膏，不含有害物质，对人体和环境无害，符合环保要求。

Environmentally friendly and non-toxic: The main ingredient is natural gypsum or chemical gypsum, which does not contain harmful substances and is harmless to human health and the environment, meeting environmental protection requirements.

应用领域

application area 

建筑领域

Construction field

墙体材料：用于制作石膏板、石膏砌块等墙体材料，具有质轻、防火、隔音、保温等优点，可用于建筑物的内隔墙、吊顶等。

Wall material: Used for making wall materials such as gypsum board and gypsum blocks, it has the advantages of light weight, fire resistance, sound insulation, and thermal insulation, and can be used for interior partitions, ceilings, etc. of buildings.

墙面装饰：粉刷石膏可用于墙面的找平、打底和装饰，能使墙面平整光滑，提高墙面的美观度。

Wall decoration: Gypsum plastering can be used for leveling, priming, and decorating walls, making them smooth and enhancing their aesthetic appeal.

地面找平和自流平：在一些地面施工中，石膏基自流平材料可用于地面的找平，具有施工速度快、平整度高的特点。

Ground leveling and self leveling: In some ground construction, gypsum based self leveling materials can be used for ground leveling, which has the characteristics of fast construction speed and high flatness.

工业领域

Industrial sector

模具制造：模型石膏粉和高强石膏粉常用于制造各种模具，如塑料模具、橡胶模具、陶瓷模具等，因其具有良好的成型性能和尺寸稳定性。

Mold manufacturing: Model gypsum powder and high-strength gypsum powder are commonly used to manufacture various molds, such as plastic molds, rubber molds, ceramic molds, etc., due to their good molding performance and dimensional stability.

造纸工业：可作为纸张的填料，能提高纸张的白度、平滑度和印刷适应性。

Paper industry: can be used as a filler for paper, which can improve the whiteness, smoothness, and printing adaptability of paper.

化工原料：是生产硫酸、硫酸铵等化工产品的重要原料。

Chemical raw materials: are important raw materials for the production of chemical products such as sulfuric acid and ammonium sulfate.

艺术领域

The arts

雕塑创作：艺术家常用石膏粉制作雕塑作品，它易于雕刻和塑形，能够快速成型，可用于制作各种艺术造型。

Sculpture creation: Artists often use gypsum powder to create sculptures, which are easy to carve and shape, can be quickly formed, and can be used to create various artistic forms.

工艺品制作：在工艺品制作中，石膏粉可用于制作各种工艺品的模具，也可直接制作一些小型的石膏工艺品。

Craft production: In craft production, gypsum powder can be used to make molds for various crafts, and can also be directly used to make some small gypsum crafts.

储存与使用注意事项

Storage and usage precautions

储存：应储存在干燥、通风良好的仓库内，避免受潮。储存时要注意防潮，垛底应垫高 100mm 以上，垛与垛之间应保持适当的距离，以便通风。

Storage: It should be stored in a dry and well ventilated warehouse to avoid moisture. When storing, attention should be paid to moisture prevention. The bottom of the stack should be raised by more than 100mm, and an appropriate distance should be maintained between stacks for ventilation.

使用

use

施工环境：施工环境温度应在 5℃至 35℃之间，避免在高温、低温或潮湿的环境下施工，以免影响石膏粉的性能。

Construction environment: The temperature of the construction environment should be between 5 ℃ and 35 ℃, avoiding construction in high, low, or humid environments to avoid affecting the performance of gypsum powder.

搅拌均匀：在使用时，应按照规定的水灰比加水搅拌，搅拌要均匀，避免出现结块现象。

Mixing evenly: When using, water should be added according to the specified water cement ratio and mixed evenly to avoid clumping.

注意凝结时间：由于石膏粉凝结硬化快，在搅拌后应尽快使用，避免因凝结而造成浪费。

Pay attention to setting time: Due to the fast setting and hardening of gypsum powder, it should be used as soon as possible after mixing to avoid waste caused by setting.

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