Accelerated setting agent - greatly shortens the cement setting time. The initial setting can reach 2 minutes and the final setting can reach 5 minutes. It is used for spraying concrete and plugging leaks.
Water reducing agent - Reduce the amount of water to achieve the same slump, reduce the water-cement ratio, thereby increasing the concrete strength at the same cement amount, or reducing the cement amount at the same strength.
Air-entraining agent - generates tiny bubbles inside the concrete to increase the workability of the concrete and improve the freezing index of the concrete.
Plasticizer - It can greatly increase the workability and slump under the same water-cement ratio without causing separation of aggregates, which is beneficial to pumping construction. It is also called pumping agent. It can even be leveled by itself for floor construction.
Curing agent - sprayed on the surface of the concrete to form a thin film to prevent evaporation loss of water inside the concrete and ensure complete hydration of the cement in the later period. It can be used in a cool and dry place instead of sprinkling water for curing (such as inside a cave).
Early strength agent - improves the early strength of concrete, but does not change the setting time of concrete, nor does it change the final strength.
Retarder - extend the initial setting and final setting time. Such admixtures usually shorten the time between initial setting and final setting. The longest retarded setting can last more than 20 hours. Once the initial setting begins, it will take about 20 minutes to finally set.
Most of the additives actually used are compound, and one additive can achieve multiple effects. Such as early-strength type water-reducing agent, which has the functions of early-strength and water-reducing at the same time.
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