WEATHER
Working with Ready-Mix concrete is affected by weather and
requires special precautions to be taken to ensure proper handling,
placing, finishing & curing of the freshly placed concrete.
Hot weather alone or in combination with high wind and dry
air can produce a rapid moisture loss from the surface of the
concrete, accelerate set, decrease air content and reduce strength.
In some cases high humidity “may” offset some of these concerns.
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Extreme Cold Weather also requires attention to the process. Concrete
will lose moisture and heat rapidly in cold weather which will affect
its setting time, strength and long term durability.
In addition to professional on-site practices such as warming the
sub-grade in cold weather OR dampening the sub-grade in hot weather,
it is highly recommended that the following best practices are adhered
to in order to ensure a desired end result:
- Schedule your ready-mix truck orders in a manner that allow for the most efficient use – adjust your schedule accordingly, well in advance during hotter or colder weather conditions to minimize waiting time and avoid unforeseen added expenses.
- Provide a sufficient work force to eliminate any delays during
construction, thereby accommodating any changes due to variances
in temperature and to coincide with your deliveries. Add extra workers
on hot, dry days.
- In some cases, during extreme weather conditions consider early
morning, evening or nighttime concrete placement.
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