Sika MonoTop®-612
concrete repair mortar
Sika MonoTop®-612 is a 1-component, fiber reinforced, containing silica fume, structural repair mortar meeting the requirements of class R3 of EN 1504-3.
- Easy to apply
- Ready to use, only need to add clean water
- Class R3 of EN 1504-3
- High mechanical resistances
- Does not require a bonding primer even when manually applied
- Suitable for hand and machine application
- Excellent finishing
- Non-corrosive
- A1 fire rating
Usage
- Thick layer repair mortar for vertical and overhead applications
- Levelling of concrete and mortars surfaces before the application of coatings
- Restoration of concrete elements
- Filling joints between precast elements
- Suitable for restoration work (Principle 3, method 3.1 and 3.3 of EN 1504-9). Repair of spalling and damaged concrete in buildings, bridges, infrastructure and superstructure works
- Suitable for structural strengthening (principle 4, method 4.4 of EN 1504-9). Increasing the bearing capacity of the concrete structure by adding mortar
- Suitable for preserving or restoring passivity (principle 7, method 7.1 and 7.2 of EN 1504-9). Increasing cover with additional mortar and replacing contaminated or carbonated concrete
Advantages
- Easy to apply
- Ready to use, only need to add clean water
- Class R3 of EN 1504-3
- High mechanical resistances
- Does not require a bonding primer even when manually applied
- Suitable for hand and machine application
- Excellent finishing
- Non-corrosive
- A1 fire rating
Packaging
25 kg bag
Colour
Grey powder
Product Details
APPROVALS / STANDARDS
Approval for contact with potable water according to WRAS requirement
Chemical Base
Cement, silica fume, polyamide fibers, selected aggregates and additives
Shelf Life
12 months
Storage Conditions
Store properly in undamaged original sealed packaging, in dry cool conditions. Protect from direct sunlight.
Density
Fresh mortar density 2.1 kg/litre at +20 °C
Maximum Grain Size
Dmax: 2.0 mm
Soluble Chloride Ion Content
| < 0.03 % | (EN 1015) |
System Structure
Sika MonoTop®-612 is part of the range of Sika mortars complying with the relevant part of European Standard EN 1504 and comprising of:
| Bonding Primer/ Reinforcement Corrosion Protection | |
| Sika Monotop®-910 S | Normal Use |
| SikaTop® Armatec® 110 EpoCem® | Demanding Requirements |
| Repair Mortar | |
| Sika MonoTop®-612 | Class R3 concrete repair hand and machine applied |
| Levelling Mortar | |
| Sika Monotop®-620 | Normal use |
Compressive Strength
| ~ 40 MPa | (EN 12190) |
Modulus of Elasticity in Compression
| ~ 25 GPa | (EN 13412) |
Tensile Strength in Flexure
| ~ 8.3 MPa after 28 days | (EN 196-1) |
Tensile Adhesion Strength
| ~ 1.9 MPa | (EN 1542) |
Restrained Shrinkage / Expansion
| Restrained Shrinkage | ~ 1.8 MPa |
| Restrained Expansion | ~ 1.7 MPa |
Reaction to Fire
Euro Class A1 | Declared |
Capillary Absorption
| ~ 0.2 kg. m-2.h-0.5 | (EN 13057) |
Carbonation Resistance
| dk ≤ control concrete MC(0.45) | (EN 13295) |
Application
Mixing Ratio
3.6 litres of water for 25 kg powder
Layer Thickness
minimum 5 mm / maximum 30 mm
Ambient Air Temperature
+5 °C minimum; +30 °C maximum
Substrate Temperature
+5 °C minimum; +30 °C maximum
Pot Life
| Temperature | Time |
| 5 °C | 60 min |
| 20 °C | 30–40 min |
| 30 °C | 15–20 min |
Consumption
This depends on the substrate roughness and thickness of layer applied. As a guide ~ 18 kg of powder per cm thick per m2
Yield
25 kg of powder yields approximately 16 litres of mortar
MIXING
Sika MonoTop®-612 can be mixed with a low speed
(< 500 rpm) hand drill mixer or for machine application, using a force action mixer 2 to 3 bags or more at once depending the type and size of mixer. Pour the recommended water in a suitable mixing container. While stirring slowly, add the powder to the water and mix thoroughly at least for 3 minutes to the required consistency.
APPLICATION
Bonding Primer:
On a well prepared and roughened substrate a bonding primer is generally not required for this product. When a bonding primer is required, refer to the System Information above for compatible Sika products and refer to the relevant Product Data Sheet for instructions.
Sika MonoTop®-612 can be applied either manually using traditional techniques or mechanically using wet spray equipment. Thoroughly pre-wet the prepared substrate a recommended 2 hours before application. Keep the surface wet and do not allow to dry. Before application remove excess water e.g. with a clean sponge. The surface shall appear a dark matt appearance without glistening and surface pores and pits shall not contain water.
When manually applying the mortar first make a scratch coat by firmly scrapping the repair mortar over the substrate surface to form a thin layer and fill any pores or pits in the surface. The surface can be finished according to the requirements using a float or with a relevant wooden or plastic float or damp sponge.
CURING TREATMENT
Protect the fresh mortar immediately from premature drying using an appropriate curing method e.g. curing compound, moist geotextile membrane, polythene sheet, etc.
CLEANING OF TOOLS
Clean all tools and application equipment with water immediately after use. Hardened material can only be mechanically removed.