Product Data Sheet Safety Data Sheet Show all documents

Sikacrete®-211

One-component, cementitious, pumpable and pourable concrete mix

Sikacrete®-211 is a one-component, Portland-cement concrete containing factory blended coarse aggregates.

  • Pre-packaged factory-blended formulation containing coarse aggregates:
   Eliminates the need to extend material in the field    Eliminates the risk of extending with reactive aggregate
  • High bond strength
  • Compatible with the typical coefficient of thermal expansion of concrete
  • Increased resistance to deicing salts
  • Simple-to-use, labor-saving system
  • Easily mixed with clean water
  • Good freeze/thaw resistance
  • Easily applied to a clean, sound and properly prepared substrate
  • Maximum size aggregate included: typical 3/8 inch (10 mm)
Product Data Sheet Safety Data Sheet Show all documents

Usage

  • Full depth concrete repairs
  • On grade, above grade, and below grade concrete
  • Horizontal surfaces (e.g. for spall repairs on flat work, or as an overlay)
  • Vertical and overhead surfaces when formed and poured, or formed and pumped with a concrete pump
  • Structural repair material for parking facilities, industrial plants, walkways, bridges, tunnels, dams, abutments, floors and balconies
  • Filler for voids and cavities
  • Repair of substrates such as concrete, mortar, and masonry
 

Advantages

  • Pre-packaged factory-blended formulation containing coarse aggregates:
   Eliminates the need to extend material in the field    Eliminates the risk of extending with reactive aggregate
  • High bond strength
  • Compatible with the typical coefficient of thermal expansion of concrete
  • Increased resistance to deicing salts
  • Simple-to-use, labor-saving system
  • Easily mixed with clean water
  • Good freeze/thaw resistance
  • Easily applied to a clean, sound and properly prepared substrate
  • Maximum size aggregate included: typical 3/8 inch (10 mm)

Packaging

80 lb (36.3 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 day2,000 psi (13.8 MPa)
7 days4,500 psi (31.0 MPa)
28 days5,000 psi (34.5 MPa)

Modulus of Elasticity in Compression

7 days

3.38 x 106 psi

(23.3 GPa)

28 days

3.44 x 106 psi

(23.7 GPa) 

Flexural Strength

28 days700 psi (4.8 MPa)

Splitting tensile strength

28 days

750 psi (5.2 MPa)

Slant Shear Strength

28 days

1,500 psi (10.3 MPa)

* Mortar scrubbed into mechanically prepared, saturated surface dry (SSD) substrate.

Shrinkage

28 days

< 0.05 %

Rapid Chloride Permeability

28 days

< 1,500 Coloumbs

Application

Application Information

Mixing Ratio

0.8 - 1.0 gallon (3.0 - 3.8 liters) of clean water per bag

(0.8 gallon = 103 fluid ounces)

Layer Thickness

Minimum

Maximum in one lift *

1 inch (25 mm)

8 inches (203 mm)

* If repair requires multiple lifts, each lift should be applied as soon as the previous lift has developed enough initial strength to support it.

Consistency

Initial Slump

6 - 9 inches (152 - 229 mm)

Slump at 30 minutes

> 4 inches (102 mm)

Product Temperature

65° - 75° F (18° - 24° C)

Ambient Air Temperature

40°- 95° F (4° - 35° C)

Substrate Temperature

40° - 95° F (4° - 35° C)

 

Set Time

Approximately 160 minutes

(ASTM C 191)   

73o F (23o C),

50% R.H.

     

Waiting / Recoat Times

Refer to Sika Tech Brief # 18-01 for minimum cure times prior to overcoating.
Consumption

Coverage

0.65 ft3  (0.02 m3) per bag

(Yield figures do not include allowance for surface profile and porosity or material waste)
Application steps

MIXING

  • Pour 0.8 gallon (3.0 liters) of clean water into a suitably sized mixing container or concrete mixer.
  • Add the entire bag's contents of Sikacrete®-211 to the container while continuously mixing with a low-speed rotary drill (400-600 rpm) and paddle or concrete mixer.
  • Add up to an additional maximum 0.2 gallon (0.8 liter) of clean water if needed for the desired consistency.
  • Do not overwater as excess water will cause segregation.
  • Mix to a uniform consistency, maximum 3 minutes.  Thorough mixing and proper proportioning are necessary.

APPLICATION

  • Ensure substrate is properly prepared and saturated surface dry (SSD) before application.
  • Ensure good intimate contact with the substrate is achieved either through a bonding agent or a scrub coat application, or other suitable means such as vibration of the material or pumping under pressure.

    

Form and Pour / Pump Installations: 

  • Vibrate form while pouring or pumping.
  • Pump with a variable pressure concrete pump.
  • Continue pumping until a 3 to 5 psi (20 - 34 Pa) increase in normal line pressure is evident then STOP pumping.
  • Form should not deflect.
  • Vent to be capped when steady flow is evident, and forms to be stripped when appropriate.

   

Horizontal Installations: 

  • After filling repair area, screed the material. 
  • Allow Sikacrete®-211 to set to desired stiffness, then finish with wood or sponge float for a smooth surface or broom or burlap-drag for a rough finish. 
  • If a smoother finish is desired, a magnesium float should be used.
  • To assist in the finishing process, use SikaFilm® finishing aid. Consult current Product Data Sheet.
  • Begin and finish multiple lift repairs on the same day.

      

Refer to ACI 305 the "Guide to Hot Weather Concreting" or ACI 306 the "Guide to Cold Weather Concreting" when there is a need to place this product while either hot or cold temperatures prevail. Thinner placements will be more sensitive to the temperature conditions.

 

CURING TREATMENT

  • As per ACI recommendations for Portland-cement concrete, curing is required.
  • Moist curing should commence immediately after finishing.
  • Moist cure with wet burlap and polyethylene, a fine mist of water or a water-based, compatible* curing compound meeting ASTM C 309.
  • Curing compounds adversely affect the adhesion of following layers of mortar, leveling mortar or protective coatings.
  • Protect newly applied material from direct sunlight, wind, rain and frost.
  • To prevent from freezing, cover with insulating material (e.g. curing blanket).


*Pretesting of curing compound for compatibility is recommended.

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