half a cubic foot
12" x 12" x 6"

please read thru the information below. I suggest using Sakrete Fast set Concrete - details below.

Crack Resistant Concrete is a pre-blended, synthetic fi bre reinforced, air
entrained concrete material. It is reinforced with alkali-resistant fi bres to
resist cracking and eliminating the need for wire mesh in many non critical
applications. It also contains an air-entraining admixture which will produce
a concrete with superior freeze-thaw and salt scaling durability. Use for
new concrete construction projects, concrete overlays and repairs where a
thickness 5 cm (2”) or more is required. Open to foot traffi c in approximately
24 hours. Meets or exceeds ASTM C 387 strength requirements.
FEATURES & BENEFITS:
• reinforced with alkali-resistant fi bres to resist cracking
• air-entrained for cold weather durability
• excellent workability
USES
For new concrete construction projects, concrete overlays and concrete
repairs. Use to construct footings, sidewalks, slabs, steps and patios,
setting deck posts, fence posts, poles, etc.
PROCEDURES
Mix and substrate temperatures should be maintained between 5 and
30ºC (40 and 86ºF) for at least 24 hours prior to and 48 hours after. For
temperatures below 5°C (40°F) refer to SAKRETE® Fast-Set Concrete.
Mixing: Empty contents of bag into mortar box, wheelbarrow or
mechanical mixer. When mixing by hand form a crater for adding water.
Add approximately 2.2 L (2 1/4 quarts) of clean water per 30 kg (66 lb) bag
or enough to achieve a workable mix. Avoid a soupy mix. Excess water
reduces strength and durability and can cause cracking. In cold weather
use warm water to accelerate the set. Use cold water to slow the set in
hot weather.

COLD WEATHER APPLICATIONS
SAKRETE Fast-Set Concrete is a pre-blended, fast-setting, high strength
concrete material. It is designed for fast construction allowing same day
use. Use for fence and deck posts, new concrete construction projects,
concrete overlays and repairs where a thickness 5 cm (2”) or more is
required. Fast-Set Concrete can also be used successfully in cold weather
projects. Open to foot traffi c in approximately 3 hours. Exceeds ASTM C
387 strength requirements.
FEATURES & BENEFITS:
• fast setting
• ideal for cold weather applications
• walk on in hours
USES
For new concrete construction projects, concrete overlays and concrete
repairs. Use to construct footings, sidewalks, slabs, steps and patios,
setting deck posts, fence posts, poles, etc.
PROCEDURES
Mix and substrate temperatures should be maintained between 5 and
30ºC (40 and 86ºF) for at least 24 hours prior to and 48 hours after.
Mixing: Empty contents of bag into mortar box, wheelbarrow or
mechanical mixer. When mixing by hand form a crater for adding water.
Add approximately 2.8 L (3 quarts) of clean water per 30 kg (66 lb) bag
or enough to achieve a workable mix. Avoid a soupy mix. Excess water
reduces strength and durability and can cause cracking. In cold weather
use warm water to accelerate the set. Use cold water to slow the set in
hot weather.
Fast Set Concrete Mix can be used successfully in cold weather weather
providing the following precautions are taken:
1. Fast Set Concrete Mix must be maintained at room temperature 24
hours prior to use.
2. Do not use if temperature will fall below –5º (23º F) Celsius within 24
hours of placing concrete.
3. Clean warm tap water should be used for mixing.
4. Placed concrete must be protected from freezing for at least 24 hours
after application. A blanket of insulation will assist in proper setting of
concrete.

Slab Calculator: Length (m) __ x Width (m) __ x Depth (cm) = ___ ÷ 100 = cubic meters ÷ 0.014 =___ # of 30kg bags required.

Slab Calculator: Length (ft) __ x Width (ft) __ x Depth (in) =___ ÷ 12 = cubic feet ___ x 2 = # of 30kg bags required ___.

approx you will need 32 (30 kg bags)

Slab Calculator: Length (m) __ x Width (m) __ x Depth (cm) = ___ ÷ 100 = cubic meters ÷ 0.014 =___ # of 30kg bags required.

Slab Calculator: Length (ft) __ x Width (ft) __ x Depth (in) =___ ÷ 12 = cubic feet ___ x 2 = # of 30kg bags required ___.

you will have use the above guide with your individual measurments.