Camelway® PSI 6000 Concrete Mix is suitable for projects requiring normal setting time with high early strength development after final set has occurred, or where a high final strength is required.
Camelway® PSI 6000 Concrete Mix is suitable for any concrete use requiring high early and ultimate strengths. The mix is air-entrained to provide superior durability in situations where concrete will be exposed to cycles of freezing and thawing. It has a walk-on time of about 8 hours. PSI 6000 can be used for any application requiring concrete in a minimum thickness of 50 mm (2”), such as slabs, footings, steps, columns, walls and patios.
Camelway® PSI 6000 – 25 kg (55 lb) bags
Each – 25 kg (55 lb) bag of Camelway® PSI 6000 will yield approximately 12.2 L (0.43 cu ft) of mixed concrete.
Camelway® PSI 6000 Concrete Mix is a construction-grade concrete, consisting of a uniformly blended and properly proportioned mixture of -9mm (-3/8”) aggregates, Portland cement, and other concrete approved ingredients. Camelway® PSI 6000 exceeds the performance requirements of ASTM C387, “Standard Specification for Packaged, Dry, Combined Materials for Mortar and Concrete.” A properly handled mix will achieve the following typical properties when tested in accordance with that specification:
TABLE 1 TYPICAL PHYSICAL PROPERTIES
|24 hours||13.8 MPa (2000psi)|
|7 days||27.6 MPa (4000 psi)|
|28 days||41.4 MPa (6000 psi)|
MIXING & PLACEMENT
yPSI 6000 can be mixed in a barrel type concrete mixer or a mortar mixer. Choose the mixer size most appropriate for the size of the job to be done. Allow at least 21 L (0.75 cu.ft.) of mixer capacity for each 25 kg (55 lb) bag of PSI 6000 to be mixed at one time.
yFor each 25 kg (55 lb) bag of PSI 6000 to be mixed, add approximately 1.9 L (½ US gallon) of fresh water to the mixer. Turn on the mixer and begin adding the bags of concrete to the mixer.
yIf the material becomes too difficult to mix, add additional water sparingly until a workable mix is achieved.
yIf a slump cone is available, adjust water to achieve a 50-75 mm (2”-3”) slump. Do not exceed 2.5 L (0.7 US gal) per 25 kg (55 lb) bag.
yAvoid mechanical vibration in placements which will be exposed to
yEmpty bags into a suitable container.
yAdd approximately 1.9 L (½ US gallon) of clean water for each 25 kg (55 lb) bag.
yWork the mix with a shovel, rake or hoe and add water as needed to achieve a stiff, moldable consistency.
yDo not exceed 2.5 L (0.7 US gallons) of water per 25 kg (55 lb) bag. yBe sure all material is wet; do not leave unabsorbed puddles of
TEMPERATURE OF WATER
Setting times will fluctuate in extremely hot or cold weather. Use cold water or water mixed with ice cubes in severely hot weather; use hot water when mixing in severely cold weather.
Stake out the area and remove sod or soil to the desired depth. Nail and stake forms securely in place. Tamp the sub base until firm.
yDampen the sub base before concrete is placed. Do not leave standing puddles.
yShovel or place the concrete into the form. Fill to the full depth of the form.
yAfter the concrete has been compacted and spread to completely fill the forms, strike off and float immediately.
yTo strike off, use a straight board (screed), moving the edge back and forth with a saw-like motion to smooth the surface. Then use a darby or bull float to float the surface. This helps level any ridges and fill voids left by the straight edge.
yCut 25 mm (1”) control joints into the slab every 1.8-2.4 M (6’ – 8’) using a grooving tool.
yAllow the concrete to stiffen slightly, waiting until all water has evaporated from the surface before troweling or applying a broom finish.
Proper curing increases the strength and durability of concrete. Proper water content and temperatures 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 finishing difficulties 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 (21oC (70oF)) or higher, or 7 days in colder weather (10-21oC (50-70oF)).
• Curing compounds should not be applied if rain or temperatures below 10oC (50oF) are expected within 24 hours
•Curing with plastic or burlap can cause patchy discoloration, especially in colored concrete. For colored concrete, wet curing or chemical curing compounds are recommended.
•Use of Camelway® Acrylic Cure & Seal – Satin Finish or other curing compounds is not recommended during late fall in northern climates on surfaces where deicers will be used to melt ice
and snow. Using curing compounds at that time may prevent proper air curing of the concrete, which is necessary to enhance its resistance to damage caused by deicers
•Protect concrete from freezing during the first 48 hours. Plastic sheeting and insulation blankets should be used if temperatures are expected to fall below freezing.