装修和工地里，石膏粉常被当成“几块钱一斤的辅料”，等墙面空鼓、自流平开裂、吊顶接缝半年就崩，才回头骂施工——其实很多时候，底子从一袋石膏粉就开始偏了。

In decoration and construction sites, gypsum powder is often regarded as a "few yuan per kilogram of auxiliary material". When the wall is hollow, self leveling cracks, and the ceiling joints collapse within six months, they will turn back to criticize the construction - in fact, many times, the foundation starts to deviate from a bag of gypsum powder.

先分清三类别，别混着用：

First, distinguish the three categories and don't mix them up:

找平石膏（粗粉）：颗粒粗、填料多，适合墙面大面积厚找平，不能拿来做精细收口；

Leveling gypsum (coarse powder): With coarse particles and a large amount of filler, it is suitable for leveling large areas of thick walls and cannot be used for fine finishing;

嵌缝石膏：柔性和粘结力是核心，吊顶石膏板拼缝、线槽补缝用它，普通腻子粉代替=后期必裂；

Jointing gypsum: Flexibility and bonding strength are key, used for ceiling gypsum board jointing and wire slot filling, replaced by ordinary putty powder, which will inevitably crack in the later stage;

轻质抹灰石膏：替代传统水泥砂浆上墙，保温好、不空鼓、施工快，但基层太光滑或不做界面处理会脱层；

Lightweight plastering gypsum: replacing traditional cement mortar on walls, with good insulation, no hollowing, and fast construction, but the base layer is too smooth or without interface treatment, which may cause delamination;

高强石膏/模具石膏：强度上来快、膨胀率可控，做造型、GRG、修补构件才用，别拿装修腻子硬顶。

High strength gypsum/mold gypsum: With fast strength and controllable expansion rate, it can be used for shaping GRG、 Only use for repairing components, do not use decorative putty to hard top.

买济南本地石膏粉，别只比“20公斤几块钱”。看四样：①初凝/终凝时间（工人没用完就结块，八成是凝结窗口太短）；②二水硫酸钙含量和烧失量（决定强度和平整度）；③是否加了足量保水剂（保水差，上墙就吸水开裂）；④有没有放射性和VOC检测，别让“便宜粉”把室内环保拖下水。

Buy local gypsum powder in Jinan, don't just compare it to "a few yuan for 20 kilograms". Look at four things: ① Initial setting/final setting time (if the worker clumps before using it up, it's probably because the setting window is too short); ② Calcium sulfate dihydrate content and loss on ignition (determining strength and flatness); ③ Has a sufficient amount of water retaining agent been added (poor water retention, water absorption and cracking on the wall); ④ Is there any radioactive and VOC testing? Don't let 'cheap powder' drag indoor environmental protection down.

非常坑的是腻子当嵌缝用、嵌缝当找平用——材料本身没假，用错场景全白搭。正规厂会标用途、标执行标准（JC/T517、GB/T9776等），袋子上写“万能石膏”的，反而非常不能信。

The most frustrating thing is that putty is used for joint filling, and joint filling is used for leveling - the material itself is not fake, and in the wrong scenario, it is completely useless. The use and implementation standards of regular factory logos (JC/T517, GB/T9776, etc.), and bags labeled with "universal gypsum" are the least trustworthy.

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我们将会对您提出的疑问进行详细的解答，欢迎您登录网站留言.

This article is a friendly contribution from Jinan gypsum powder For more information, please click: https://www.jnfhjc.com We will provide detailed answers to your questions. You are welcome to log in to our website and leave a message