| A concrete
project is not complete until all Six Steps to Quality
Concrete are followed. Make sure your concrete is properly
cured and sealed.
The best way to protect your concrete investment is
to be knowledgeable on its proper installation and aftercare.
There are six requirements to achieve quality exterior
concrete flatwork. The contractor who places the concrete
must follow the first five requirements. You will want
to make sure before his job is done that he has fulfilled
the fifth requirement – Proper Curing.
This requirement includes the following: The concrete
must be cured immediately after finishing! Curing greatly
increases the strength and durability of the concrete
surface and its resistance to freezing and thawing as
well as de-icer salts.
*Curing is a process where a
satisfactory moisture content and temperature must be
maintained for a 7 day minimum.
*There are several methods of
curing however the most common method is the use of
a high quality spray on curing compound applied at the
manufacturer’s recommendation (contact your local
ready mix supplier to purchase this product).
*In spring and fall when average
temperatures are below 50 degrees, use cold weather
concrete practices to maintain temperature and cure
the concrete for at least 7 days.
After the contractor applies a curing compound to the
concrete, directly after the final finishing step, the
number six requirement - Consumer Sealing and Aftercare
should begin. Proper Sealing & Aftercare involves
the following items:
*Keep vehicles off of freshly
placed concrete for at least 7 days.
*Freshly placed concrete should
be sealed after allowing a minimum of 30 days to air
dry. Consider resealing aged concrete every several
years or as wear in high traffic areas begins to show.
Follow manufacturer’s recommendations (contact
your local ready mix supplier to purchase this product).
*Sealing is a process where a
protective coating or penetrating water repellent material
is applied to keep moisture and contaminates out of
the concrete.
*The use of down spouts can help
ensure that drain water does NOT undermine the slab
which can cause settlement cracks.
*Prevent snow and ice from accumulating
on the concrete especially during the first winter.
*NEVER allow the use of de-icing
chemicals especially the first winter. Sand can always
be used for traction.
*Never use de-icers containing
fertilizer ingredients such as ammonium sulfate, ammonium
nitrate, calcium chloride and magnesium chloride. These
chemicals WILL ATTACK AND DESTROY CONCRETE BY CHEMICAL
REACTION. NEVER USE THESE PRODUCTS!
It is recommended that you seal your concrete every
two to five years, preferably in September, depending
on the type of product used. Concrete like any natural
material must be protected against freeze-thaw cycles
and chemical de-icers that are used. As the concrete
sealer wears from year to year a new layer of water
repellant sealer should be applied to increase the longevity
of the concrete surface.
For more information, contact your local WRMCA ready-mixed
producer.
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