Outside shrinkage cracks can occur on AAC block walls for various reasons, including:-
1) Drying shrinkage:-
Causes contraction and creates tensile stress, leading to cracks.
2) Thermal expansion and contraction:-
Causes the blocks to expand or contract in response to high temperatures or temperature variations, resulting in cracking.
3) Improper curing:-
Inadequate curing techniques or insufficient curing time can lead to shrinkage cracks.
4) Structural movements:-
Alterations in the length, curvature, or orientation of structural components can cause cracks.
5) Floor deformation and movement:-
Deflection of floors under weight can lead to wall deformation and cracking.
6) Ceiling deflection and movement:-
Deflection of ceilings under various loads can cause cracks along the wall.
7) Wall movements due to temperature and moisture:-
Expansion and contraction caused by temperature and moisture variations can generate tensile stresses and lead to cracks.
8) Settlement and shrinkage:-
Natural drying process of the blocks can cause minor cracks, particularly during the initial stages of construction.
9) Uneven loading and foundation issues:-
Excessive pressure on specific areas of the wall can lead to cracks.
10) Moisture and water intrusion:-
Prolonged exposure to moisture or water can weaken the blocks and promote crack formation.
