Remove all loose and/or deteriorated material as well as any surface contaminants such as oil, paint, grease, etc.
Empty the contents of the bag into a clean wheelbarrow, mortar box, mechanical mixer or other mixing vessel. Form a crater with a shovel or hoe in the center of the dry mix. Pour the recommended 5.4 quarts (5.1 L) of clean potable water into the crater.
An excessive amount of water will weaken the mix and can result in cracking. Add small quantities, 1 pint (0.5 L) or less, of water and thoroughly mix to reduce stiffness.
For hand mixing
Blend dry mix with a shovel or hoe from the outer edges working the material towards the center. Continue mixing until all free water is used and all the aggregate is uniformly coated with cement.
For mechanical mixing
Mix the material for three minutes.
Be sure to provide a proper footing. Lay masonry per industry and local standards.
Joints can be finished when material has begun to set and the surface has a thumbprint hard consistency. Mortar joints can be finished with a jointing tool.
Protect from direct sunlight, wind, rain and frost during the curing period.
Clean tools and equipment with water immediately after use. Cured material will need to be mechanically removed.
Physical state and appearance :
Dry powder with aggregate
Wet mix >12
ASTM C109 : 108%
Compressive strengths – psi:
7 Days : 1,680 (11.6 MPa)
28 Days : > 1800 (12.4 MPa)
One 80 lb (36.3 kg) bag will lay up to 65 standard bricks and 26 standard blocks