Gunshot LPS is spray applied with low-pressure spray equipment to vertical and overhead concrete substrates when repairing vertical and overhead concrete structures.
Where to use:
High production vertical and overhead concrete repairs.How to apply:
Spray or trowel applied. Additional InformationPerformance Characteristics
- Low shrinkage Maintains integrity of repair, resists cracking.
- Thermal compatibility Prevents delamination due to temperature change.
- Corrosion protection Protects reinforcing steel in repair zone and suppresses ring anode effect.
- Durable Resistant to weathering action, excellent freeze/thaw stability and abrasion resistance.
- Very low permeability Resistant to deicing salts, carbo- nation, chloride, and chemical attack.
- High build Place up to 2 inch lifts without rebound.
- Economical Improves productivity.
- Consistent results Excellent consolidation around reinforcing steel.
- High early strength Minimize out-of-service time.
Surface Preparation
- Remove loose and deteriorated material, laitance, dirt, dust, oil and any surface contaminants that will inhibit proper bond.
- Saw cut edges with a diamond blade at a 90° angle to eliminate feather edging. Avoid polishing the edges as this will inhibit bond.
- Avoid bruising or micro cracking during surface preparation. Refer to ICRI Surface Preparation Guide 03732.
- Repair zone must be a minimum of 1/4 inch deep, of simple geometry, with no complex edge conditions.
- Avoid long narrow repairs; these have a tendency to crack.
- Apply Conpro Start where a consolidant is of benefit.
- Saturate substrate with clean water, (saturated surface dry/SSD), with no standing water during Priming or Application.
- Remove concrete from corroded steel and several inches beyond to expose non-corroded steel.
- Provide a 3/4 inch clearance between the concrete and steel.
- Damaged reinforcing steel should be inspected by a qualified engineer and appropriate action taken.
Priming
Concrete- Apply Conpro Primer, or ECB as a bonding primer to all exposed surfaces. Refer to the individual product technical data bulletin for information.
- Remove all scaling rust from reinforcing steel.
- Apply ECB anti-corrosion coating.
Mixing
- Mechanically mix using a low speed drill (400-600 rpm) and mixing paddle or mortar mixer.
- Pour 2-1/4 quarts of potable water into a clean mixing vessel and slowly add all of the powder.
- Mix continuously for 3 minutes to a uniform, lump-free consistency.
- Add up to 1 pint of additional water, if needed.
- Allow to “breathe” for 1 minute and remix for 1 minute. This will improve workability and open time.
- Do not overmix, as this will entrain excess air.
- Do not re-temper.
Application
- At the time of application, surfaces should be saturated surface dry (SSD) but hold no standing water.
- Follow instructions for Priming.
- Material should be applied by an experienced nozzle man using a rotor/stator or peristaltic pump.
- Follow ACI 506R,for recommendations for wet process shotcrete.
- Material may be applied in multiple lifts of not less than 3/8 inch and no greater than 2 inches.
- Allow material to stiffen to thumb-print hard before continuing.
- Scratch (cross-hatch) each lift to prepare surface for subsequent lift.
- Strike off with straight edge to a uniform plane, close with a trowel or sponge float.
- Force the material against the edges of the repair, working toward the center.
- Material may be applied in multiple lifts of not less than 3/8 inch and no greater than 2 inches.
- Consolidate each lift and allow to stiffen to thumb-print hard before continuing.
- Scratch (cross-hatch) each lift to prepare surface for subsequent lift.
- Finish with a sponge float or trowel.
- Do not overwork the finish.
Curing
- Dampen the repair with a fine mist of water for 24 hours or moist cure with wet burlap and polyethylene. Alternatively, apply ProMasonry Cure & Seal.
- Protect repair from direct sunlight, wind, rain and frost during curing period.
Clean Up
- Clean tools and equipment with water immediately after use.
- Cured material must be removed mechanically.
Coverage/Yield
- 0.41 ft³/50 lbs.
Product Handling
- Packaging 50 lb paper bags.
- Shelf Life 12 months when properly stored.
- Storage Transport and store in cool, clean, dry conditions in unopened containers. High temperature or high humidity will reduce shelf life.
Limitations
- Do not apply unless substrate and ambient temperature can be maintained at a minimum of 40°F for 24 hours. Refer to ACI Cold Weather Application Guidelines.
- Cold mixing water and low temperature will retard set. Hot water and high temperature will accelerate set.
- Protect application from precipitation and high wind for at least 8 hours.
- Do not add more water than specified, this will lower strengths and cause shrinkage cracking.
- Avoid overworking material during placement and finishing – this will produce surface (map) cracking.
Health and Safety
- Product is alkaline.
- Do not ingest.
- Avoid breathing dust.
- Avoid contact with skin and eyes.
- Refer to Safety Data Sheet (SDS) for additional information.
First Aid
- In case of skin contact, wash thoroughly with soap and water.
- In case of eye contact, flush immediately with a high volume of water for at least 15 minutes and contact a medical professional.
- For respiratory problems, remove person to fresh air.
Disposal
- Dispose of material in accordance with local, state and federal regulations.
