Technical Specifications

CONCRETE BLOCK
by
Curing is one of the most important steps in concrete
construction. Proper curing increases the strength and
durability of concrete, and a poor curing job can ruin an
otherwise well-done project. Proper water content and
temperature are essential for good curing. In near freezing
temperatures, the hydration process slows considerably.
When weather is too hot, dry, or windy, water is lost by
evaporation from the concrete and hydration stops,
resulting in nishing difculties and cracks. The ideal
circumstances for curing are ample moisture and moderate
temperature and wind conditions. Curing should be started
as soon as possible and should continue for a period of 5
days in warm weather of 70 degrees F (21 degrees C) or
higher or 7 days in cool weather of 50 – 70 degrees (10 –
21 degrees C) or cooler. Protect concrete from freezing for
at least 48 hours. Plastic sheeting and insulation blankets
should be used if temperatures are expected to fall below
32 degrees F (0 degrees C).
Curing Information
Warranty
Refer to www.midwestmanufacturing.com for the most current technical data, MSDS, and guide specications.
Precautions
Important! Read before using.
• This product contains Portland cement. Contact with
freshly mixed product can cause severe burns. Avoid
direct contact with eyes.
• If this product should contact eyes, immediately
ush with water for at least 15 minutes and consult
a physician. For skin exposure, wash promptly with
plenty of soap and water, and remove soaked clothing
promptly. If this product burns your skin, see a
physician immediately.
• This product may contain silica. Silica dust, if inhaled,
may cause respiratory or other health problems.
Prolonged inhalation may cause delayed lung injury,
including silicosis and possibly cancer. A N95 approved
dust mask, eye protection, rubber boots, and gloves are
recommended when using this product.
Midwest Manufacturing guarantees this product against
manufacturing defects when used according to the
instructions provided. This guarantee will be honored
with proof of purchase. Midwest Manufacturing does not
guarantee this product if used for any purpose other than
the general purpose for which it is intended. Midwest
Manufacturing’s obligation is limited to replacement of
defective product only. Midwest Manufacturing will not be
responsible for lost time, replacement labor, nor any other
commensurate costs associated with replacement.
Any standard concrete nishing technique is acceptable for
use with Fast Setting Concrete Mix. Concrete can be hand
troweled, power troweled, broom nished or nished with
specialty nishes.
Finishing
Keep out of reach of children
Curing Methods
• Other methods of providing proper curing include
covering the surface with wet burlap, keeping the
surface wet with a lawn sprinkler and covering the
surface with plastic sheeting or waterproof paper to
prevent moisture loss.
• If burlap is used, it should be free of chemicals that
could weaken or discolor the concrete. New burlap
should be washed before use. Place it when the
concrete is hard enough to withstand surface damage
and sprinkle it periodically to keep the concrete surface
continuously moist.
• Water curing with lawn sprinklers, nozzles or soaking
hoses must be continuous to prevent interruption of
the curing process.
• Curing with plastic sheets is convenient. They must
be laid at, thoroughly sealed at joints and, anchored
carefully along edges.