Admixtures provide physical as well as economic benefits. Admixtures benefits the concrete in following possible ways- ● It reduce the required quantity of cement and make concrete economical ● Increase workability without increasing water content ● Imparts early strength ● It reduce the early heat of hydration and overcome thermal cracking in concrete. So it decelerate the hydration. ● Improve the resistance against freeze-thawing and make cement water proof ● It can accelerate or decelerate the setting time ● It also act as anti-bacterial agents. ● It make concrete acid proof ● Reduce segregation and bleeding and improve pumpability. ● Increase the hardened concrete strength