Cements are divided into three categories according to their uses and properties.
1. General Cement, Cement commonly used in civil engineering. General-purpose cement mainly refers to six categories of cement specified in gb175-1999, gb1344-1999, and gb12958-1999, namely, Portland cement, ordinary portland cement, slag portland cement, pozzolanic portland cement, and powder Coal ash portland cement and composite portland cement.
2, special cement, special purpose cement. Such as: g-grade oil well cement, road Portland cement.
3, characteristics of cement, a relatively prominent performance of the cement. Such as: quick-hardening Portland cement, low-heat slag portland cement, expanded sulphoaluminate cement.
Cement is classified according to its main hydraulic material name
(1) Portland cement, commonly known as Portland cement abroad;
(2) Aluminate cement;
(3) Sulphoaluminate cement;
(4) Ferroaluminate cement;
(5) Fluoroaluminate cement;
(6) Cements based on volcanic ash or potentially hydraulic materials and other active materials.
The main technical characteristics of cement as required in the designation of cement are divided into:
(1) Fastness: divided into two categories: fast and fast;
(2) Heat of hydration: divided into medium heat and low heat;
(3) Sulfate resistance: divided into two categories: resistance to sulphate corrosion and high resistance to sulphate corrosion;
(4) Swelling: Divided into two categories: swelling and self-stress;
(5) High temperature resistance: The high temperature resistance of aluminate cement is classified based on alumina content in cement.
Yellow Sand Cement Cement