Intent 1:
To limit the probability of:
- an excessively high cement/aggregate ratio, which could
lead to poor workability, excessive compressive strength and attendant
high shrinkage, which could lead to tensile stresses and the cracking
of mortar or masonry units, or
- an excessively low cement/aggregate ratio, which could
lead to weak, porous mortar and inadequate bonding with masonry units.
This is to limit the probability of:
- compromised structural integrity of masonry construction,
- where masonry construction is part of an environmental
separator, the displacement or failure of required environmental separation
elements, which could lead to deterioration,
- in assemblies exposed to moisture or the exterior, damage
and deterioration, or
- an inability to resist expected loads, which could lead
to:
- the excessive movement or deformation of walls, or
- the excessive deflection or vibration of floors.
This is to limit the probability of:
- the space being unsuitable for its intended use,
- compromised operation of windows or doors, or
- damage to the building.