Product Data Sheet
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SikaCem®-226 CI

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
Product Data Sheet
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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 Life

12 months from date of production if stored properly in original, unopened and undamaged sealed packaging

Storage Conditions

Store dry at 40–95 °F (4–35 °C)

Protect from moisture. If damp, discard material

 
Technical Information

Compressive Strength

1 day2,500 psi (17.2 MPa)
7 days6,000 psi (41.4 MPa)
28 days8,000 psi (55.2 MPa)

Flexural Strength

28 days

1,200 psi (8.3 MPa)

Slant Shear Strength

3 day

>2,000 psi (13.8 MPa)

28 day

>2,500 psi (17.2 MPa)

Shrinkage

28 days

< 0.07 %

Rapid Chloride Permeability

28 Day

very low, < 1000 coulombs

Application

Application Information

Mixing Ratio

6 - 7 pints (2.8 - 3.3 L) per bag

Fresh mortar density

25 lb/ft3

(ASTM C-138)

Layer Thickness

Min.Max. in one lift
Overhead3/8” (9 mm)1 - 1.5”* (25.4 - 38 mm)
Vertical3/8” (9 mm)2” (51 mm)

*If > 1.5”, each lift should be applied as soon as the previous lift will support it.

Product Temperature

65–75 °F (18–24 °C)

Ambient Air Temperature

> 40 °F (4 °C)

Substrate Temperature

> 40 °F (4 °C)

Set Time

 >4 hours (Initial)

(ASTM C-266)

Final set time

>5 hours

(ASTM C-266)
Consumption

Coverage

0.40 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.

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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