Product Data Sheet
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SikaCem®-103

Machine-applied, silica fume enhanced, cementitious mortar

SikaCem®-103 is a ready-to-use, non-accelerated, cementitious, silica fume enhanced mortar with a dust control agent. SikaCem®-103 is formulated for machine applications using dry or wet process spray equipment.

  • One-component, ready to use mortar
  • Excellent adhesion to currently prepared, sound substrates
  • High compressive and flexural strength, rapid strength and development
  • High density
  • 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®-103 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 and development
  • High density
  • 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 days6,000 psi (41.4 MPa)
7 days7,000 psi (48.3 MPa)
28 days8,000 psi (55.2 MPa)

* Cubes casted by spray application

Modulus of Elasticity in Compression

28 days5.8x106 psi (40 GPa)

Flexural Strength

7 days1,000 psi (6.9 MPa)
28 days1,400 psi (9.7 MPa)

Tensile Strength

7 days600 psi (4.1 MPa)
28 days750 psi (5.2 MPa)

Pull-Out Resistance

28 days290-580 psi (2.0-4.0 MPa)

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

Freeze-Thaw Stability

300 cycles95 %

Rapid Chloride Permeability

28 days> 750 C

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

0.48 ft3 (0.01 m3) per bag

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

APPLICATION

  • Apply SikaCem®-103 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®-103 is applied by conventional dry spray shotcrete equipment.
  • Generally, do not use equipment with high rotor capacity.
  • Apply SikaCem®-103 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®-103 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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