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nature : water and slurry, both in the air hardening, but also in the water hardening of cementitious material. This material known as cement. Many different types of cement, according to the nature and purpose, can generally be classified into general use (ordinary portland cement, slag cement, etc.) and special purpose cement (rapid hardening cement, cement dam, expansive cement, oil well cement, etc.); Components can also be divided into portland cement, aluminate cement , sulfur (Fe) aluminate cement. Made of cement mortar or concrete, solid durability is an important building materials and engineering materials. Widely used in the construction of water conservancy, roads, national defense and other projects.
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