Spray Applied - SikaCem®-226 CI
High performance repair mortar for wet spray application
SikaCem®-226 CI is a one-component, pre-packaged, ready-to-use, cementitious, silica fume, fiber reinforced, high strength shrinkage-compensated mortar. Formulated for application by trowel or low pressure spray. It is designed especially for repair of overhead and vertical surfaces.
- Ready-for-use, one-component material
- Easy to use; just add water
- Sprayable system
- Superior workability. Can be troweled and screeded after application
- Labor-saving system
- Superior abrasion resistance over conventional Portland cement mortar
- Bond strength ensures superior adhesion
- Compatible with coefficient of thermal expansion of concrete
- Increased resistance to de-icing salts
- Good freeze/thaw resistance
- High early strengths
- Very low shrinkage
- Silica Fume enhanced
- Fiber reinforced
- Contains an integral corrosion inhibitor
Usage
- Structural repair material for water and waste water treatment plants, parking structures, industrial plants, bridges tunnels and dams, etc.
- Vertical and overhead surfaces
- On grade, above grade, and below grade on concrete and mortar
Advantages
- Ready-for-use, one-component material
- Easy to use; just add water
- Sprayable system
- Superior workability. Can be troweled and screeded after application
- Labor-saving system
- Superior abrasion resistance over conventional Portland cement mortar
- Bond strength ensures superior adhesion
- Compatible with coefficient of thermal expansion of concrete
- Increased resistance to de-icing salts
- Good freeze/thaw resistance
- High early strengths
- Very low shrinkage
- Silica Fume enhanced
- Fiber reinforced
- Contains an integral corrosion inhibitor
Packaging
50 lb (22.7 kg) bag
Color
Gray powder
Product Details
Product Information
Shelf Life12 months from date of production if stored properly in original, unopened and undamaged sealed packaging
Storage ConditionsStore dry at 40-95 °F (4-35 °C)
Protect from moisture. If damp, discard material
Technical Information
Application
Application Information
Mixing Ratio6 - 7 pints (2.8 - 3.3 L) per bag
Product Temperature65-75 °F (18-24 °C)
Ambient Air Temperature> 40 °F (4 °C)
Substrate Temperature> 40 °F (4 °C)
Consumption
Coverage0.40 ft3 (0.01 m3) per bag
(Coverage figures do not include allowance for surface profile and porosity or material waste)
Application Steps
MIXING- With water: Pour 6.0 pints (2.8 L) of clean potable water (approximately 70 °F) into a suitably sized and clean mixing container, using a calibrated measuring jug, or similar, to ensure strict control of the water content (do not over-water). Add 1 bag while continuing to mix with a low-speed drill (400-600 rpm) and mixing paddle or in an appropriate mortar mixer. Once all the powder has been added, mix for approximately 3 minutes, until a lump-free and uniform consistency is achieved. Add up to another 1 pints (0.47 L) of water to achieve desired consistency. Do not over-water.
- With SikaLatex® R: Pour 6 up to 7 pints (2.8 - 3.3 L) of SikaLatex® R into the mixing container. Slowly add powder, mix and adjust as above.
- With diluted SikaLatex® R: SikaLatex® R may be diluted up to 5:1 (water: SikaLatex® R) for projects requiring minimal polymer modification. Pour 6 up to 7 pints (2.8 - 3.3 L) of the mixture into the mixing container. Slowly add powder, mix and adjust as above.
EXTENSION WITH AGGREGATES
- For applications greater than 1" (25 mm) in depth, add 3/8" (9.5 mm) coarse aggregate.
- The aggregate must be non-reactive (reference ASTM C-1260, C-227 and C-289), clean, well graded, Saturated Surface Dry (SSD), have low absorption and high density, and comply with ASTM C-33 size number 8 per Table 2.
- Variances in aggregate may result in different strengths.
- The addition rate is 25 lb. (11.4 kg) of aggregate per bag. It is approximately 2.0 gallons (7.6 L) by loose volume of aggregate.
- Consult Sika Corporation’s Technical Service Department for recommendations.
APPLICATION- Conventional wet-process shotcrete equipment such as a low-pressure machine should be used.
- At the time of application, surfaces should be SSD but hold no standing water.
- Apply SikaCem®-226 CI by low pressure spraying or troweling for repairing vertical or overhead surfaces.
- This minimizes rebound, creates the smoothest pattern (reduces ‘bumps’) and properly encases the rebars.
- After application, allow it to stiffen for about 10 minutes before removing bumpy areas with a trowel.
- Before applying the next layer, allow the shotcrete to reach initial set.
- This will take anywhere from 45 minutes to several hours, depending on mix consistency, mix and ambient temperature, wind conditions and humidity.
- Begin and finish a given patch on the same day.
CURING TREATMENT- As per ACI recommendations for Portland cement concrete, curing is required.
- Moist cure with wet burlap and polyethylene, a fine mist of water or a Sika® Antisol®-250 W* compatible curing compound.
- Curing compounds adversely affect the adhesion of following lifts of mortar, leveling mortar or protective coatings.
- Moist curing should commence immediately after finishing. Protect freshly applied mortar from direct sunlight, wind, rain and frost.
* Pretesting of curing compound is recommended.
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