Product Data Sheet
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SikaCem®-133

Machine-applied, polymer-modified, silica fume enhanced, cementitious mortar

SikaCem®-133 is a high performance, ready-to-use, non-accelerated, cementitious, polymer-modified, silica fume enhanced mortar with a dust control agent. SikaCem®-133 is formulated for machine applications using dry or wet process shotcrete equipment.

  • One-component, ready to use mortar.
  • Excellent adhesion to currently prepared, sound substrates.
  • High compressive and flexural strength, rapid strength development.
  • Excellent freeze/thaw durability and resistance to deicing salts.
  • Tested for application during dynamic load (under traffic conditions).
  • Increased density and durability - can be used as a thin overlay for additional protection of reinforcement.
  • High resistance to the diffusion of carbon dioxide (carbonation).
  • Constant modulus of elasticity in a wide temperature range.
  • Formulated to minimize dust formation.
  • Low in rebound, extremely economical in use.
  • Low water cement ratio, very low shrinkage.
  • Can be troweled and screed after application.
Product Data Sheet
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Usage

SikaCem®-133 is particularly suitable for structural repairs in large area applications; for structures such as bridges, viaducts, retaining walls, parking structures, tunnels, galleries, industrial and residential buildings, piers, off-shore platforms, etc.
  • Use on grade, above, and below grade on concrete and mortar.
  • Use on vertical, overhead and horizontal surfaces.
 

Advantages

  • One-component, ready to use mortar.
  • Excellent adhesion to currently prepared, sound substrates.
  • High compressive and flexural strength, rapid strength development.
  • Excellent freeze/thaw durability and resistance to deicing salts.
  • Tested for application during dynamic load (under traffic conditions).
  • Increased density and durability - can be used as a thin overlay for additional protection of reinforcement.
  • High resistance to the diffusion of carbon dioxide (carbonation).
  • Constant modulus of elasticity in a wide temperature range.
  • Formulated to minimize dust formation.
  • Low in rebound, extremely economical in use.
  • Low water cement ratio, very low shrinkage.
  • Can be troweled and screed after application.

Packaging

55 lb (25 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)

Condition material to 65–75 °F before using

Protect from moisture. If damp, discard material

Density

137 lb/ft3 (2.2 kg/l)

(ASTM C-138)
Technical Information

Compressive Strength

2 days4,000 psi (27.6 MPa)
7 days6,000 psi (41.1 MPa)
28 days8,000 psi (55.2 MPa)

Modulus of Elasticity in Compression

28 days3.5x106 psi (24 GPa)

Flexural Strength

7 days1,250 psi (8.6 MPa)
28 days1,630 psi (11.2 MPa)

Tensile Strength

7 days630 psi (4.3 MPa)
28 days800 psi (5.5 MPa)

Pull-Out Resistance

28 days

290-580 psi (2.0-4.0 MPa)

Substrate failure

* Mortar scrubbed into substrate at 73 °F (23 °C) and 50 % R.H.

Coefficient of Thermal Expansion

4.4x10-6/F (8x10-6/C)

(ASTM  C-531)

Freeze-Thaw Stability

300 cycles100 %

Rapid Chloride Permeability

28 days< 500 C

Lap Shear Strength

μCO2

20,000

Application

Application Information

Mixing Ratio

5-6 pts (2.4-2.8 L) per bag

Layer Thickness

Min.Max.
Large areas1/3" (8 mm)2" (50 mm)
Local application1/4" (6 mm)6–10" (150–250 mm)

Ambient Air Temperature

> 40 °F (4 °C)

Substrate Temperature

> 40 °F (4 °C)

 
Consumption

Coverage

Overhead0.42 ft3 (0.01 m3)
Vertical0.45 ft3 (0.01 m3)
Horizontal0.48 ft3 (0.01 m3)

(Yield in service will vary according to amount of water utilized in the shotcreting process)
Application steps

APPLICATION

  • Apply SikaCem®-133 mortar by spraying or trowelling for repairing vertical or overhead surfaces.
  • Shoot perpendicular (90°) to the surface. This minimizes rebound, creates the smoothest pattern (reduces ‘bumps’) and properly encases the rebars.
  • The velocity of the material is sufficient if, at a distance of 18 to 24" (457 to 609 mm), the material pattern flattens out on contact with the surface and the rebars are encased.
  • After applying the material, allow it to stiffen for about 10 minutes before removing bumpy areas with a trowel.
  • Before applying the next layer, allow the material to reach initial set. This will take anywhere from 2-4 hours, depending on mix consistency, mix and ambient temperature, wind conditions and humidity.
  • Begin and finish a given patch on the same day.
 

Dry Process

  • SikaCem®-133 is applied by conventional dry spray shotcrete equipment.
  • Generally, do not use equipment with high rotor capacity.
  • Apply SikaCem®-133 in accordance with ACI 506-R85, “Guide to Shotcrete”. Important factors to observe during shotcreting are nozzle distance (2–6 ft.), angle to substrate (90 °), and consistency of mortar.
  • Immediately after application and before set, mortar consistency should be plastic, like a firm jelly.

     

Wet Process

  • Conventional wet-process spray equipment such as the Mayco ST-45 or C-30HD machine should be used.
  • Set up wet-process equipment; then add the water (5-6 pts per bag) directly into mixer.
  • Start the mixer in motion and add the SikaCem®-133 mortar while continuing to mix.
  • Mix for 3 minutes to uniform consistency.

    

Natural gun finish

  • If a gun-finish is too rough, special finishes may be applied.
  • Approximately 5–10 min. after initial set, excess material should be sliced off with a sharp-edged cutting screed. The surface may then be finished to your requirements:
  • Broomed for a rough texture
  • Wood-floated for a granular texture
  • Steel-trowelled for a smooth finish

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 water based* 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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