Product Data Sheet
|03 01 30.71||
DATA SHEET 3900-820
820 Rapid-Set Patching Compound
820 Rapid-Set Patching Compound is a ready-to-use, fast-hardening, high strength concrete repairing compound. Restoring concrete structures subject to corrosive attack from the sea and heavy weathering revealed the exceptional bond and durability provided by the formulation. Millions of pounds have been used yearly by private contractors and government agencies. 820 Rapid-Set Patching Compound is also available in a Sulfate Resistant version.
820 Rapid-Set Patching Compound applications include the repair of any masonry or concrete structure in need of restoration
For use in fairly warm summer-like temperatures 50°F (10°C) and over.
For use either above water or underwater in cold conditions. (Although tests show 820 Winter Grade Rapid-Set Patching Compound will set-up and harden at below freezing temperatures, it is safer to bring area to be repaired up to at least 32°F (0°C).
820 Winter Grade Rapid-Set Patching Compound will set very quickly if used in warm summer weather.
25 Kg multi-all paper bags
|Pot Life||Mix and place within 5 minutes.
Mix no more than 2 bags at one time.
|Set Time||ASTM C807 – at room temperature using trowelable mix.|
|Summer Grade||S.R.||Winter Grade||S.R.|
|Initial||10-12 minutes||15-17 minutes||5-8 minutes||0-13 minutes|
|Final||15-20 minutes||20-25 minutes||8-12 minutes||5-17 minutes|
ASTM C109 750 psi (5.3 MPa)
2000 psi (14 MPa)
|Bond Strength After 7 days
(ASTM C666 – 300 cycles) ORF
|Shear Bond – ORF Method
1480 psi (10.2 MPa) Freeze-Thaw
Resistance: Very good resistance –comparable to well-designed, air entrained, Portland cement concrete.
Extending: When repairing exceptionally large or deep areas, up to 50 lb (22.7 kg) of crushed stone or pea gravel may be added per bag.
Yield: One cubic foot requires a little over 2 bags. Using crushed stone or pea gravel one ft3 requires a little over 1 bag.
Acrylic Latex Intralok Bonding Agent should be used as the mixing liquid for repair of industrial floors subject to heavy loading or where normal curing conditions are unsatisfactory.