concrete expansion agents are divided into three categories
1. calcium sulfoaluminate concrete expansion agents
expansion agents with hydrated calcium sulfoaluminate or ettringite as the main expansion source
2. calcium sulfoaluminate - calcium oxide concrete expansion agent
it refers to a concrete expansion agent that reacts with cement and water to form ettringite and calcium hydroxide after hydration. .
3. calcium oxide concrete expansion agent
it refers to a concrete expansion agent that is mixed with cement and water and undergoes a hydration reaction to generate calcium hydroxide.
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