Intent 1:
To limit the probability of:
- an excessive loss of water due to evaporation,
- the freezing of concrete before the initial set,
- slowed hydration of the concrete, or
- the freezing and expansion of the excess water not used
in hydration.
This is to limit the probability of:
- a failure to develop sufficient compressive strength
before building loads are applied,
- shrinkage and cracking, or
- the failure of internal bonds.
This is to limit the probability of:
- where concrete supports or is used in an environmental
separator
- the compromised integrity of the environmental separator,
or
- an inadequate resistance to air and moisture transfer
through the concrete, and
- where concrete supports or is used in the walls of chimneys
or fireplaces, the failure of these walls.
This is to limit the probability of:
- pollutant ingress (from the exterior or from adjacent
interior space, including soil gas, combustion products from parking
garages, and particulates),
- precipitation ingress,
- condensation,
- the ingress of moisture from the ground,
- the leakage of combustion products, or
- the compromised thermal performance of components intended
to provide resistance to heat transfer.
This is to limit the probability of:
- the generation of pollutants from biological growth
or from materials that become unstable on wetting,
- deterioration, which could lead to further compromised
integrity of environmental separators, or
- an inadequate control of indoor air and surface temperatures,
drafts, relative humidity, or water accumulation.
This is to limit the probability of:
- negative effects on the air quality of indoor spaces,
- the inadequate thermal comfort of persons, and
- contact with moisture.
This is to limit the probability of harm to persons.