1. waterproofing agent
waterproofing agent is a chemical additive that is added to cement. when condensation and hardening, the volume expands, which plays the role of compensating shrinkage and tensioning steel bars to generate prestress and fully filling cement gaps.
2. expanding agent
expanding agent is a modern word that refers to a chemical admixtures are added to cement. when the cement solidifies and hardens, it expands in volume and plays the role of compensating for shrinkage and tensioning steel bars to generate prestress and fully filling cement gaps. main ingredients: alunite expansion agent, calcium sulfoaluminate expansion agent, calcium oxide expansion agent, iron filings expansion agent, calcium oxide-calcium sulfoaluminate composite expansion agent, etc.
3. concrete
concrete (concrete, stone arrow) is made of gel material, the general name for composite materials that are composed of aggregate and water in appropriate proportions and then hardened over a certain period of time. it is the most widely used artificial civil construction material in the world. concrete has high hardness, wide sources of raw materials, and low cost. it is widely used in structures such as houses, highways, military projects, and nuclear power plants.
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