Retarders, commonly known as retardants, are substances or devices used to slow down or delay a process or action. They are mainly employed to control or regulate the speed or rate of a particular reaction, process, or function. The term "retarder" can be used in various fields such as chemistry, engineering, construction, and transportation.
In chemistry and engineering, retarders are substances added to a reaction or process to slow down its progress, thereby prolonging the time required for the desired outcome to be achieved. For instance, in concrete mixing, retarders are agents added to the mixture to slow down the hardening process, allowing for more workability and preventing premature setting of the material.
In construction, retarders are often used in the context of concrete and plastering. They are substances incorporated into these materials to delay the curing or setting time, providing extended periods for shaping or finishing before they harden.
In transportation, retarders refer to devices or systems installed in vehicles, particularly large trucks or trains, to assist in slowing down or reducing the speed of the vehicle. These mechanisms are generally used as an alternative or auxiliary braking system, reducing wear on traditional friction brakes and improving overall safety.
Overall, retarders play a crucial role in several industries by allowing for better control, safer operations, and enhanced performance through the regulation of time-dependent processes or activities.
