Cementing materials are substances with a certain mechanical strength, that can bind other bulk materials (such as sand and stones) or block materials (such as bricks and stones) as a whole during the process of gradually changing from a malleable slurry to a solid stone-like solid under physical and chemical action.
The cementing material has a long history of development and has played an important role in the vigorous development of modern construction engineering.
It can be divided to two main categories- Inorganic and organic cementing materials.
Organic cementing materials include various kinds of resin, asphalt and rubber. The Inorganic one can be divided into hydraulic and non-hydraulic hydraulic cementing materials according to its hardening conditions. The hydraulic kind can harden in the air after mixing with water, and can harden better in water, keep and continue to develop the strength, usually referred to cement, such as Portland cement, aluminate cement, sulphoaluminate cement, fluoroaluminate cement, iron aluminate cement, non-clinker cement, etc. Non-hydraulic cementing materials can harden in air after adding water, hold and develop its strength, but not harden or develop its strength in water, also called as gas-hardening cementing materials, such as lime, gypsum, water glass, Magnesium materials, etc.