The correct answer is: A. Cement is added to lime mortar to increase its hydraulic properties only.
Cement is added to lime mortar to increase its strength, durability, and water resistance. It also helps to reduce shrinkage and cracking. However, cement does not only increase the hydraulic properties of lime mortar. It also affects its workability, setting time, and bonding strength.
Lime surkhi mortar is a type of lime mortar that is made with lime, surkhi (burnt brick powder), and sand. It is used for pointing the walls of buildings. Lime should be slaked before preparing lime mortar. Slaking is the process of adding water to lime to make it into a putty. This process makes the lime more workable and helps to prevent it from setting too quickly.
High early strength concrete is a type of concrete that is designed to gain strength quickly. It is often used in cold weather conditions because it can be placed and finished in a shorter period of time. However, high early strength concrete is not always the best choice for all applications. It can be more expensive than other types of concrete and it may not be as durable.
In conclusion, the incorrect statement is: A. Cement is added to lime mortar to increase its hydraulic properties only.