Sika MonoTop®-623 F
Sika MonoTop®-623 F is a 1-component, polymer-modified, fibre-reinforced and early strength-gaining, cementitious mortar for overhead and vertical concrete repair and reprofiling. It is based upon Sika’s internationally proven and established MonoTop® technology, designed for effective repairs and with the environment in mind.
- Pre-bagged for quality control and predictable performance
- Easy to prepare; just add clean potable water
- Contains integral corrosion inhibitor based on proven technology
- Formulated with inert, non-reactive aggregates to eliminate potential Alkali-Aggregate Reactivity (AAR)
- Heat of hydration minimized to extend working time, especially in warm conditions
- Can be hand-placed or wet-sprayed
- Excellent bond, tensile and flexural strengths
- High build, yet can be feather-edged
- High early strength
- Shrinkage-controlled to reduce length change
- Very easy to apply; can be shaved or sculpted and easily finished
- Product produces light grey repairs, similar to precast concrete
Usage
- On, above, and below grade
- Horizontal and vertical defects
- Overhead and vertical concrete and mortar
- Cast-in-place, precast and tilt-up structures
- Exterior and interior applications
Advantages
- Pre-bagged for quality control and predictable performance
- Easy to prepare; just add clean potable water
- Contains integral corrosion inhibitor based on proven technology
- Formulated with inert, non-reactive aggregates to eliminate potential Alkali-Aggregate Reactivity (AAR)
- Heat of hydration minimized to extend working time, especially in warm conditions
- Can be hand-placed or wet-sprayed
- Excellent bond, tensile and flexural strengths
- High build, yet can be feather-edged
- High early strength
- Shrinkage-controlled to reduce length change
- Very easy to apply; can be shaved or sculpted and easily finished
- Product produces light grey repairs, similar to precast concrete
Packaging
22.7 kg (50 lb) multi-wall bag
Colour
Light Grey
Product Details
ENVIRONMENTAL INFORMATION
- Contributes towards satisfying LEED®v4 MR Credit - Building Product Disclosure and Optimization – Environmental Product Declarations (Option 1)
- Contributes towards satisfying LEED®v4 MR Credit - Building Product Disclosure and Optimization - Material Ingredients (Option 1)
Shelf Life
12 months in original, unopened packaging.
Storage Conditions
Store dry, ensuring that product is not exposed to rain, condensation or high humidity. For best results, condition product at temperatures between 18 to 29 °C (65 to 84 °F) before using.
Density
| 2,030 kg/m3 (126 lb/ft3) | (ASTM C185) |
Compressive Strength
| 24 hours | 18 MPa (2610 psi) |
| 7 days | 30 MPa (4351 psi) |
| 28 days | 40 MPa (5801 psi) |
| Temperature | Dosage | ||
| 23 °C (73 °F) | 2 bottles (300 mL) | 24 hours | 25 MPa (3265 psi) |
| 23 °C (73 °F) | 2 bottles (300 mL) | 7 days | 40 MPa (5800 psi) |
| 23 °C (73 °F) | 2 bottles (300 mL) | 28 days | 45 MPa (6525 psi) |
All moulds, mixing tools and powder components were pre-conditioned to the test temperatures. Prepared test specimens were cast and then cured at the indicated test temperatures until the time of testing. Sikacem® Accelerator added to mix water (water content = 3.3 L [0.87 US gal.] + 1 bottle of Sikacem® Accelerator; water content = 3.1 L [0.82 US gal.] + 2 bottles of Sikacem® Accelerator).
Modulus of Elasticity in Compression
| (ASTM C469) |
Tensile Strength in Flexure
| (ASTM C348) |
Shrinkage
| (ASTM C157) |
Pull-Off Strength
| > 3 MPa (> 435 psi) | (CSA A23.2-6B) |
Freeze Thaw De-Icing Salt Resistance
| (ASTM C666) |
Chloride Ion Diffusion Resistance
| (ASTM C1202) |
Splitting Tensile Strength
| 28 days | > 4.5 MPa (> 650 psi) |
Application
Mixing Ratio
3.1 to 3.3 L (0.82 to 0.87 US gal.) of water per 22.7 kg (50 lb) bag.
Application Time
20 to 40 minutes
Finishing Time
40 to 60 minutes
Yield
Approx. 12.9 L (0.45 ft3) per 22.7 kg (50 lb) bag
MIXING
For each 22.7 kg (50 lb) bag of material, pour approx. 3.1 L (0.82 US gal.) of clean potable water into a suitably sized and clean mixing container. Add Sika MonoTop®-623 F slowly while mechanically-mixing, using a heavy-duty, low-speed drill (300 - 450 rpm) with a Mud Mixer/Box or Propeller-type paddle. Mix to a uniform consistency for a minimum of three (3) minutes. Add additional water to the product up to maximum of 3.3 L (0.87 US gal.) and, if a more fluid consistency is desired, continue to mix beyond the initial three (3) minute mixing period.
APPLICATION
At time of application, repair sites or surfaces should be damp (saturated surface dry) but free from standing water or glistening water films. Apply a 3 mm (1/8 in) thick scrub coat of the mixed mortar into the substrate, filling all pores, voids and edges and completely covering the repair site. Onto the fresh scrub coat, force the mortar against the edge of repair, working towards the centre and observing minimum and maximum layer thicknesses. If the repair requires several lifts (layers), apply the mortar, leaving a rough profile, and then score the surface immediately in a cross-hatch pattern to a depth of approximately 6 mm (1/4 in) to provide a key. Allow the layer to achieve initial set and then apply subsequent layers as soon as the previous lift will support it without being displaced. Allow the completed repair to set to desired stiffness; shave, cut or sculpt and then finish with a steel, wood or sponge float, or texture as required. If using a soft- to medium-density and dampened sponge to finish a repair, work in circular motion to remove trowel marks and merge the mortar with the parent substrate.
Note: Avoid over dampening the sponge or the face of the repair during finishing and avoid over-finishing the material.
CURING TREATMENT
As per ACI 308 recommendations for cement concrete, curing is required. To achieve performance consistent with Technical Data, curing must be provided by recognized curing methods, such as wet burlap covered with white polyethylene film or approved water-based curing compound, such as Sika® Florseal WB-18 & -25. Curing must commence immediately after placing and finishing. Moist-curing must be maintained for the first 24 hours only. Protect freshly applied mortar from direct sunlight, wind, rain and frost.
CLEAN UP
Clean all tools and equipment after use with water. Once hardened, the product can only be removed mechanically. Wash soiled hands and skin thoroughly in hot soapy water.
FAQ
While this product is acceptable for horizontal applications, we recommend the usage of Sika MonoTop®-622F for a better workability.
Curing must commence immediately after placing and finishing. Moist-curing must be maintained for the first 24 hours only. Protect freshly applied mortar from direct sunlight, wind, rain, and frost.
Apply a 3 mm (1/8 in) thick scrub coat of the mixed mortar into the substrate, filling all pores, voids and edges and completely covering the repair site. Onto the fresh scrub coat, force the mortar against the edge of repair, working toward the centre and observing minimum and maximum layer thicknesses. If the repair requires several lifts (layers), apply the mortar, leaving a rough profile, and then score the surface immediately in a crosshatch pattern to a depth of approximately 6 mm (¼ in) to provide a key. Allow the layer to achieve initial set and then apply subsequent layers as soon as the previous lift will support it without being displaced. Allow the completed repair to set to desired stiffness; shave, cut or sculpt and then finish with a steel, wood or sponge float, or texture as required. If using a soft- to medium density and dampened sponge to finish a repair, work in circular motion to remove trowel marks and merge the mortar with the parent substrate.
Note: Avoid over dampening the sponge or the face of the repair during finishing and avoid over-finishing the material.
During application, Substrate should be saturated surface dry (SSD) with no standing water, and repair sites or surfaces should be damp (saturated surface dry) but free from standing water or glistening water films.
Mix to a uniform consistency for a minimum of three (3) minutes. Add additional water to the product up to maximum of 3.3 L (0,87 US gal) and, if a more fluid consistency is desired, continue to mix beyond the initial three (3) minute mixing period.
3.1 to 3.3 L (0.82 to 0,87 US gal.) of water per 22.7 kg (50 lb) bag.
For each 22.7 kg (50 lb) bag of material, pour approx. 3.1 L (0.82 US gal.) of potable water into a suitably sized and clean mixing container. Use only potable water and do not overwater.
Remove all deteriorated concrete, dirt, oil, grease, other bond inhibiting materials from the surface. Preparation work should be done by chipping, high-pressure water blasting or other appropriate mechanical means. Obtain substrate aggregate fracture with a minimum surface profile of ± 3 mm (1/8 in) (ICRI / CSP 6 - 9). Dampen surface to be repaired with clean water. Substrate should be saturated surface dry (SSD) with no standing water during the application.
Approximately 12.9 L (0.45 ft3) per 22.7 kg (50 lb) bag.
The minimum ambient and substrate temperature is +5 °C (41 °F) and rising at time of application. For best results, condition product to +18 to +29 °C (65 to 84 °F) prior to mixing and installation. Lower temperatures may result in slower strength development and longer cure times.
The application time takes about 20 to 40 minutes while the finishing time takes 40 to 60 minutes.
