RazorFinish A BEAUTIFUL NEW LOOK FOR CONCRETE RazorFinish
is a ready mix product that has a brighter, smoother finish than
regular concrete. RazorFinish makes any patio, driveway or
walkway a beautiful addition to your home and landscape.
RazorFinish is made with the highest quality ingredients and special
admixtures to give it a creamier finish and better “workability” than
ordinary concrete mixes. It cures to a bright, clean finish that
looks sensational. RazorFinish also is incredibly durable and can
withstand tough treatment and harsh weather. It resists cracking,
scaling and the damage caused by the freeze/thaw cycle. It also
resists staining and looks great for years to come. Roller Compacted Concrete GREAT DURABILTY & DUMP-TRUCK DELIVERY Razorback
Concrete Company recently became the first ready mix supplier in
Arkansas to offer Roller Compact Concrete, a zero-slump concrete
mixture that can be delivered in dump trucks and roller-compacted with
the same equipment used for asphalt pavement construction. RCC
provides the strength and durability of concrete with asphalt’s ease of
application. RCC is excellent for use as a sub base for low-speed
city streets and parking lots. It can be laid quickly, it can be
used year-round and it’s water proof, unlike most base courses.
Novamesh GREATER STRENGTH & CRACK RESISTENCE
Novamesh provides enhanced hardening and strength attributes with less
plastic shrinkage and plastic settlement cracking. It’s perfect
for driveways or slabs on grade. The steel and synthetic fibers
in Novamesh are homogeneous throughout the mix; it makes welded wire
fabric or light rebar unnecessary and it provides much better crack
control and performs better in the freeze-thaw cycle.
Fiber Reinforcement
Like most building products these days, fibrous concrete reinforcements
have evolved into something more complex than 15 or 20 years ago.
More than 40 billion square feet of concrete slabs on grade have been
completed in that time span utilizing these fibers instead of
traditional methods. We now have a much better understanding of what
different types of fibers can and cannot do.
Among some of
the alternatives that exist in fiber types are monofilament
polypropylene, which is virtually invisible on the surface of concrete
providing economical crack prevention and control. Fibrillated
polypropylene, which is even better at crack prevention and control but
is sometimes visible on the surface. Steel fibers, which offer
unequalled crack control and impact resistance but are a little more
expensive. And, the newest engineered synthetic polymer fibers, which
offer the benefits of steel without the possibility of corrosion.
Here are some questions to ask when designing a concrete slab:
- What would the proposed traditional method of reinforcement have been? WWF, secondary rebar, thicker slab or none at all?
- Is the fiber-free surface necessary, or will there be another floor covering on top of the slab?
-
What’s more important: tight crack control, extreme load handling or a
mirror smooth surface finish? Or is it a combination of factors?
- What are the economic limitations involved?
Surface Shrinkage
Problem: Cracks that appear on the surface of freshly placed concrete during or soon after finishing.
Cause: The very top of the concrete is losing moisture quicker than
it is replaced by bleed water. This causes shrinkage of the
surface while the underlying plastic concrete remains the same volume.
These cracks are usually one to three feet apart and one to two inches
deep and usually run parallel to each other.
Cure: Recognize ahead of time weather conditions that are conducive
to plastic shrinkage. These include low humidity, hot sun bearing down,
and windy conditions. Also make sure to have the proper manpower,
equipment and supplies on hand so the concrete can be placed and
finished promptly. If delays occur, cover the concrete with wet burlap,
Visqueen or building paper between finishing operations. Anything you
can do to minimize the loss of moisture from the top because of sun
and/or wind will help. Also, you can use a monomolecular film spray to
hold the moisture after bull floating. You can find this at building
supply stores. It is also easier than putting up wind breaks.
To learn more, go to www.nrmca.org/aboutconcrete/cips.
|
Tech Info 
