Use and Care Guide

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The Pro’s Choice Since 1936
Crack Resistant Concrete Mix
Preparation/Application:
For best results all materials should be stored between 40°F (4°C) and 80°F
(27°C) 24 hours prior to installation.
Refer to:
- ACI 302.1 Guide for Concrete Flooring and Slab Construction
- ACI 305R Guide to Hot Weather Concreting
Flatwork (Slabs, sidewalks, walkways, etc.):
1. Stake out the area where the concrete will be placed.
2. Cut and remove all soil, grass, sod, etc.
3. For improved drainage place several inches of gravel into the excavated
area. Remember to allow enough depth for both the gravel and a minimum
of 4” (102 mm) of concrete.
4. Place forms in the desired area assuring that they are level, square, and all
corners sealed so no premixed material can escape once placed.
5. Place the concrete into the forms to full depth.
6. Consolidate by moving into corners and low areas to assure there are
no voids.
7. Using a straight edge (a 2 x 4 works well) level the surface of the concrete
using a back and forth sawing motion.
8. Using a float or trowel smooth the surface to remove imperfections. This
is not a final trowel finish, so complete this quickly. Too much troweling at
this point will cause dusting and weaken the surface.
9. Using a concrete grooving tool, cut joints into the concrete every 3 - 4 ft
(.9 - 1.2 m). Expansion joints should be placed every 8 ft x 12 ft (2.4 x 3.7 m)
in each direction and must extend through the entire depth of the slab.
10. Once the concrete has stiffened slightly and all water has evaporated
from the surface use the trowel to put a smooth level surface on the
concrete. Applying a light broom finish will aid with traction and remove
any imperfections left from the trowel.
11. Forms can be removed the following day.
Posts and Poles:
1. Dig hole to required depth and diameter (depth should be 1/3 the length
of the post or pole and hole should be 3 times the diameter of the pole or
post width).
2. Place the post or pole in the center of the hole.
3. Level and support post or pole in place.
4. Fill hole with mixed concrete and consolidate to remove any air voids.
5. Slope concrete at the surface to allow water to drain away.
6. Wait a minimum of 24 hours before posts or poles are subjected to
any strain.
7. If load bearing consult with your local building code requirements before
proceeding.
Repairs (greater than 2” (51 mm) in depth):
1. Surfaces to be repaired must be sound, dimensionally stable, and clean.
2. Slick or sealed surfaces must be thoroughly roughened to an ICRI CSP of
3 to 5.
3. Sides of repair area must be squared off.
4. Clean all reinforcing steel to bare white metal and coat with a rust
preventative if not covering within 8 hours.
5. All surfaces that will come in contact with the concrete mix should be
brought to a SSD (Surface Saturated Dry condition before application of the
material.
Formulated to reduce the risk
of surface shrinkage cracks,
Sakrete
®
Crack Resistant Concrete
Mix is a professional strength blend
of cementitious materials, sands,
stone and fibers. For repair and
building jobs where concrete
thickness exceeds 2” (51 mm).
Features:
• High Strength 4,000 psi
• Eliminates the need for wire mesh in many non-critical applications
• Full depth applications 2” (51 mm) or greater
• Ideal for structural applications requiring a small volume of concrete
• Reduced cracking
Use For:
• Driveways
• Slabs
• Patios
• Walkways
• Curbs
• Stairs
• Setting fence posts
• Foundation walls and footings
• Structural applications requiring a small volume of concrete
Yield/Water/Coverage:
Estimate of the number of 80 lb (36.3 kg) bags (0.60 ft
3
(0.017 m
3
) per bag) of
Sakrete Crack Resistant Concrete Mix to place a slab.
To determine coverage: Multiply Length (feet) x Width (feet) x Thickness (inches)
and divide by 12. Then divide by the yield in the chart above to determine the
numbers of bags needed. See Calculator on Sakrete.com for additional
assistance. Yield and water are approximate.
Technical Data:
Sakrete Crack Resistant Concrete Mix meets or exceeds the compressive
strength requirements of ASTM C387 specification when used as directed.
Compressive Strength ASTM C39
7 days = 2,500 psi (17 MPa)
28 days = 4,000 psi (27.6 MPa)
Slump Range = 2” - 3” (50 - 75 mm)
DIVISION 3
Structural Concrete – 03 31 00
COLOR:
Gray
Bag Size Yield Water
80 lb (36.3 kg) 0.60 ft
3
(.017 m
3
) 3.5 qt (3.3 L)