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研究表明：纯β型半水石膏在养护和烘干条件下能产生最大膨胀率为０４００％的微膨胀；高铝水泥适合作石膏型膨胀材料；确定了用于补偿锌合金收缩的膨胀石膏型材料的组分及较优配比。研究了膨胀石膏型的膨胀规律、抗压强度和膨胀机理，生成钙矾石是高铝水泥石膏型产生膨胀的主要动因。用所开发的膨胀石膏型浇铸制作肥皂盒的锌合金模具，较好地解决了锌合金的凝固收缩问题。
The results show that the pure β-type hemihydrate gypsum can produce slight expansion of 0400% under the condition of curing and drying. The high-alumina cement is suitable for the gypsum-based expansion material. The expansion of the zinc alloy for compensating the shrinkage of the zinc alloy is determined Gypsum material components and the ratio of better. The swelling law, compressive strength and expansion mechanism of expanded gypsum were studied. The formation of ettringite was the main reason for the expansion of high-alumina cement gypsum. With the development of expansion gypsum cast soap box made of zinc alloy mold, a better solution to the problem of solidification and shrinkage of zinc alloy.