Portland cement is the most common type of cement in general usage in many parts of the world, as it is a basic ingredient of concrete, mortar, stucco and most non-specialty grout. There are different standards for classification of Portland cement. The two major standards are the ASTM C150 used primarily in the U.S. and European EN-197. EN 197 cement types CEM Ⅰ, Ⅱ, Ⅲ, Ⅳ, and Ⅴ do not correspond to the similarly-named cement types in ASTM C 150. Portland cement manufacture can cause environmental impacts at all stages of the process. When cement is mixed with water a highly alkaline solution (pH～13) is produced by the dissolution of calcium, sodium and potassium hydroxides.
New, Material, Portland Cement
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