During plastering a new surface, it should be washed with water and kept damp to obtain which of the following?

Question

Question

This question was previously asked in

RRB JE CBT 2 (Civil Engineering) ReExam Official Paper (Held On: 04 Jun, 2025)

Answer 1

Explanation:

When plastering a new surface, it is important to wash it with water and keep it damp before applying plaster.
This process ensures optimum suction, which means the surface absorbs just the right amount of water from the plaster.
If the surface is too dry, it will absorb water rapidly, causing the plaster to dry prematurely, leading to poor adhesion, cracking, or weak bond.
If the surface is too wet, plaster may not adhere properly or may sag.

Additional Information

Pointing is the process of applying mortar to the exposed joints of masonry to improve both appearance and durability.
It is commonly done on brick or stone walls where the joints are visible and require finishing or repair.
The primary goal is to seal joints against water penetration and to enhance the wall's aesthetic appeal.
Flush Pointing: Mortar is pressed flush with the surface of the masonry and neatly finished. It is durable and offers minimal water entry points.
Recessed Pointing: The mortar is pressed inside the joint, creating a groove. It's often used for modern buildings due to its clean look.
Weathered Pointing: The mortar joint is sloped to shed water, protecting it from rain ingress.