gypsum

a mixture of lime or gypsum with sand and water

灰或、沙子和水的混合物

Penecontemporaneous or seepage-reflux dolomitization is the original mechanism for gypsum-bearing muddy dolomicrite.

准同生化或卤水回流渗透化是晶-微晶岩（含岩）的形成机制。

There are not only illite, but also asphalt, microcrystalline quartz, dolomite, calcite, anorthite, gypsum, and such as potential damage materials.

储层不仅含伊利，还发育沥青、微晶英、、方解、钙长和等潜在损害物质。

The result of the test indicated that the aluminium sulfate and the sodium tartrate potassium bond was advantageous to prepare the short columnar alpha-hemihydrated gypsum crystal.

试验结果表明,添加硫酸铝与酒酸钠钾复合转晶剂,对制备短柱状α型半水晶体有利;

The specific properties of gypsum and its slurry, the effect of different refractories on the properties of plaster molding, and how to control main process of gypseous mold are analyzed.

在大量试验研究的基础上,阐述了有关型铸工艺的几个主要技术问题,分析了及其浆料的特性,各种填加物对型性能的影响,以及如何控制型铸造的主要工艺过程

R esults show that the modified cement with good durability, small expansion and low alkality can be made by use of gypsum and zeolite modifying alumina cement.

结果表明：以和沸对高铝水改性，可配制出耐久性良好、具有微膨胀性的低碱度改性水。