同樣是石膏粉，普通建筑石膏一袋幾十塊，高強(qiáng)石膏可能要翻兩三倍。貴在哪里？值不值得多花錢？看完這篇你就有答案了。

Similarly, for gypsum powder, a bag of ordinary building gypsum contains dozens of pieces, while high-strength gypsum may need to be doubled or tripled. Where is it expensive? Is it worth spending more money? After reading this article, you will have the answer.

兩者的本質(zhì)區(qū)別：晶體結(jié)構(gòu)不同。 普通建筑石膏是β型半水石膏，高強(qiáng)石膏是α型半水石膏。雖然化學(xué)成分一樣，但晶體形態(tài)不同——α型晶體更完整、更致密，因此物理性能優(yōu)于β型。

The essential difference between the two is their different crystal structures. Ordinary building gypsum is beta type hemihydrate gypsum, while high-strength gypsum is alpha type hemihydrate gypsum. Although the chemical composition is the same, the crystal morphology is different - α - type crystals are more complete and dense, so their physical properties far exceed those of β - type crystals.

強(qiáng)度的差距有多大？ 建筑石膏的物理強(qiáng)度較低。而高強(qiáng)石膏的物理強(qiáng)度一般為普通石膏粉的3倍以上。具體來說，高強(qiáng)石膏的干燥抗壓強(qiáng)度可達(dá)25-40MPa。2小時(shí)抗折強(qiáng)度5-8MPa，抗壓強(qiáng)度15-25MPa；恒重時(shí)抗折強(qiáng)度7-13MPa，抗壓強(qiáng)度25-45MPa。

What is the difference in intensity? The physical strength of building gypsum is relatively low. The physical strength of high-strength gypsum is generally more than three times that of ordinary gypsum powder. Specifically, the dry compressive strength of high-strength gypsum can reach 25-40MPa. 2-hour flexural strength 5-8MPa, compressive strength 15-25MPa; The flexural strength at constant weight is 7-13MPa, and the compressive strength is 25-45MPa.

用途的差別：

Differences in usage:

建筑石膏：主要用于紙面石膏板、石膏砌塊、普通裝飾材料。用量大、要求不高、性價(jià)比優(yōu)先。

Architectural gypsum: mainly used for paper faced gypsum boards, gypsum blocks, and ordinary decorative materials. Large usage, low requirements, cost-effectiveness priority.

高強(qiáng)石膏：用于石膏基自流平砂漿、防火門芯板、陶瓷模具等對(duì)強(qiáng)度有高要求的場(chǎng)景。還能替代建筑石膏用于更高標(biāo)準(zhǔn)的工程。

High strength gypsum: used in gypsum based self leveling mortar, fireproof door core board, ceramic molds and other scenarios that require high strength. It can also replace building gypsum for higher standard projects.

值不值得多花錢？ 看場(chǎng)景。普通墻面抹灰、嵌縫修補(bǔ)，建筑石膏完全夠用，沒必要多花錢。做自流平地面、防火門芯板、精密模具，建議用高強(qiáng)石膏，普通石膏強(qiáng)度不夠會(huì)出問題。陶瓷模具要求干燥抗壓強(qiáng)度25-40MPa，只有高強(qiáng)石膏能達(dá)到。

Is it worth spending more money? Look at the scene. Ordinary wall plastering, joint repair, and building gypsum are completely sufficient, there is no need to spend extra money. To make self leveling flooring, fireproof door core panels, and precision molds, high-strength gypsum must be used. Insufficient strength of ordinary gypsum can cause problems. Ceramic molds require a dry compressive strength of 25-40MPa, which can only be achieved by high-strength gypsum.

高強(qiáng)石膏的其他優(yōu)勢(shì)：生產(chǎn)成本僅比普通石膏高30%左右。孔隙率更低、耐久性更好。對(duì)于要求高的工程，多花的錢絕對(duì)值得。

Other advantages of high-strength gypsum: The production cost is only about 30% higher than that of ordinary gypsum. Lower porosity and better durability. For projects with high requirements, the extra money is definitely worth it.

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