Usually, people will be in the mixing process and before mixing in the concrete to improve the performance of the concrete of the substance collectively known as admixtures.
The quality of the polycarboxylate superplasticizer in the concrete shall not be more than 5% of the cement mass generally.
The retarding agent, accelerating agent and early strength agent can adjust the hardening property and setting time of concrete.
The main function of admixtures such as air entraining agent, water reducing agent and pumping agent is to improve the rheological property of concrete mixture and make it easier to be pumped to the designated place.
Admixtures such as water repellent agent, air entrain agent and rust inhibitor are used to improve the durability of concrete.
In order to improve other properties of concrete, it is necessary to add additives such as coloring agent, aerating agent, antifreeze agent and expansion agent into concrete.
