RE-Shotcrete

Product Description

RE-Shotcrete is a water-based polymer mortar, composed of garnet, cement, special additives and functional admixtures, and liquid type of water-based acrylic polymer emulsion. It is a spray type and non-shrinking mortar for sectional rehabilitation.

Application

1. Repair of Deteriorated Reinforced Concrete Structure Section
2. Binder for FRP Reinforcement Systems

1. Mixing equipment: Electric power mixer, small silo & continuous mixer (1m3).
2. Gauge: Scales.
3. Application equipment: Shotcrete mortar sprayer, air-compressor, hose, nozzle.
4. Specification of the sprayer:
   Max capacity: 2.4m3/hour (adjustable).
   Compressor: 5.5kw (7.5HP) or greater.
   Pump: Mono-type.
   Hose: 35mm / 30 bar pressure.
   Nozzle: T=15mm urethane nozzle pipe.

1. Excellent water-tightness & durability
2. Excellent adhesive strength with old concrete
3. Low rebounding & falling off rate
4. Good waterproofing & rustproofing

Test Results

Test Item	Unit	Test Result Age 28 days	Test Method
Adhesive Strength	N/mm²	2.83	KS F 4918
Compressive Strength	N/mm²	46.62	KS L 5105
Flexural Strength	N/mm²	7.82	KS F 2476
Drying Shrinkage Ratio	%	0.002	KS F 2424

Mixing Ratio

RE-Monotar
Type A	Refined Water
1 lb	.14~.16 lb

Directions

1. Measure 1lb of Type A and .14 – .16lb of Type B in each container.
2. Amount of Type B may vary depending on temperature and humidity.
3. Mix .040lb of Type B to 1lb of Type A and add Type B within 10% in 5 minutes in consideration of work efficiency and mix it for 3 minutes before application.
4. Be sure to mix Type B within the specified range and to mix mixture well to ensure quality application.
5. Apply the mortar using a trowel and sprayer.
6. Spray water or thin mortar before application so as to mitigate the friction inside the hose .
7. Take appropriate measures to prevent the surface from being rapidly dried by wind or sunlight .
8. Spraying-application.
9. Spray the mortar moving at round direction with a gun aimed at the surface at a right angle, at 20 inches away.
10. Apply the primary coat at 5mm thick or less to fill the void and increase the bond strength.

1. Sufficient curing is required under temperatures below 50°F
2. In case of any condensation on surface, dry the surface using a heater, fan, air compressor or portable burner.
3. In case of hot-weather concreting on dried surface, spray refined water or liquid to prevent the mortar from drying too rapidly.
4. Limit the amount of mixed material at normal temperature so that it can be applied within 30 minutes.
5. Do not use if powder hardens or freezes.
6. Do not apply at temperatures below 31°F
7. As the viscosity varies depending on temperature and humidity, keep agitating to prevent the aggregate from being segregated in low viscosity, and add type B within a mixing ratio allowable before agitating the material in high viscosity.
8. Protect the surface from external impact for at least 24 hours after application, and the following works shall depend on curing progress.
9. In case the application is suspended for 30 minutes or longer, remove all material inside the hose.

1. Refer to instruction on storage of powder or liquid-type material for further details. If problems persists, contact the manufacturer.

1. Those not instructed in specifications may follow standard concrete specifications.
2. In the event of any discrepancies between the specification and work environment, consult the manufacturer or designer before application.