The property of the cement from some of the clinker with an addition of 4% gypsum is similar to a Portland cement of 52.5R grade.
部分熟料中加入4%的石膏制得水泥，其性能符合强度等级52.5R的硅酸盐水泥标准要求。
2
Effects of different foreign ions on sintering of Portland cement clinker are different.
杂质离子对硅酸盐水泥熟料烧成有不同影响。
3
The chemical corrosion resistances of the mortars of quartz, Portland cement clinker and aluminous cement clinker were studied respectively for comparison.