Sika® Patch M MY
Sika® Patch M MY is a pourable 1-part cementitious mortar for repair situations where high early strength is required.
- Easy and user friendly application
- High early strengths
- Good ultimate strengths
- Excellent bonding properties
- Non-corrosive to reinforcement
- Non-toxic
- Requires only water for mixing
- Cracking tendency with Baenziger Block Test is zero cracks
- Never mix with admixtures, cement or readymix mortars
Usage
Fast repair mortar for level and slightly inclined concrete and mortar substrates where a rapid return to service is required.Advantages
- Easy and user friendly application
- High early strengths
- Good ultimate strengths
- Excellent bonding properties
- Non-corrosive to reinforcement
- Non-toxic
- Requires only water for mixing
- Cracking tendency with Baenziger Block Test is zero cracks
- Never mix with admixtures, cement or readymix mortars
Packaging
25 kg bag
Colour
Grey powder
Product Details
Shelf Life
6 months from the date of production
Storage Conditions
Stored in its original unopened bag in a dry cool place. Protect from direct sunlight, rain, water and moisture.
System Structure
| Bond coat | Sikadur®-732 |
| Repair mortar | Sika® Patch M MY |
Compressive Strength
| After 2 hours | After 4 hours | After 24 hours | After 28 days | |
| Neat | 15 N/mm² | 30 N/mm² | 45 N/mm² | 50 N/mm² |
| + 15 kg of 0–10 mm chippings | 17 N/mm² | 30 N/mm² | 45 N/mm² | 50 N/mm² |
| + 20 kg of 0–20 mm aggregates | 18 N/mm² | 30 N/mm² | 45 N/mm² | 50 N/mm² |
Note: The added aggregates shall be well-graded and pre-wetted to saturated-surface-dry (SSD) condition.
Baenziger Block
No cracks (Curing is done in the outdoor conditions)
Coefficient of Thermal Expansion
Equivalent to concrete
Application
Mixing Ratio
3.4–3.6 L of water per 25 kg bag
Fresh Mortar Density
~2.20 kg/l
Layer Thickness
Section thickness 15–30 mm
Use neat Sika® Patch M MY. Saw cut the edge to minimum of 15 mm depth.
Section thickness 30–75 mm
Mix 1 bag of Sika® Patch M MY with 15 kg of graded 10 mm chippings. Saw cut the edge to minimum of 60 mm depth.
Section thickness 75–150 mm
Mix 1 bag of Sika® Patch M MY with 20 kg of graded 20 mm aggregates. Saw cut the edge to minimum of 60 mm depth.
Section thickness above 150 mm
Mix 1 bag of Sika® Patch M MY with 20 kg of graded 20 mm aggregates but ensure operation is conducted in layers not exceeding 150 mm thickness. Saw cut the edge to minimum of 60 mm depth.
Ambient Air Temperature
+15 °C min. / +35 °C max.
Pot Life
20 minutes at 25 °C
Consumption
| Bonding Bridge (Sikadur®-732) | 0.3-0.8 kg/m² , depending on substrate condition. Substrates that are extremely rough may require higher consumption. |
| Neat Mortar | 1 bag yields ~13 L of fluid mortar that corresponds to 0.65 m² per 20 mm thickness |
| Mixed with 15 kg of 0–10 mm chippings | 1 bag yields ~18 L of concrete that corresponds to 0.36 m² per 50 mm thickness |
| Mixed with 20 kg of 0–20 mm aggregates | 1 bag yields ~21 L of concrete that corresponds to 0.21 m² per 100 mm thickness |
Note: The figures given above do not include wastage.
MIXING
In order to reduce the thermal peak, we recommend mixing Sika® Patch M MY with iced-water. Pour required quantity of iced water into suitable mixing vessel. Slowly add powder under constant stirring. To limit entraining of air, mix mechanically for at least 3 minutes with electric slow speed stirrer (500 rpm max.)
Other suitable mixing tools are 1 or 2 armed basket type mixers, forced-action mixers or stand type mixers. Do not use free-fall mixers.
APPLICATION
Immediately pour the mortar onto the bonding bridge (wet-on-wet) and de-air using a spike roller (for neat mixes only).
Compact well. When using chippings or aggregates, vibrate the mix. Ensure the vibrator does not touch the wire netting. Avoid excessive vibration in order to prevent segregation.
Ensure an uninterrupted application.
After compaction and finishing, allow the bleed water to evaporate and, then spray Sika® Antisol®-90 onto the repair area (~0.20 l/m²). Once the Sika® Patch M MY starts to harden, spray Sika® Antisol®-90 to again ensure proper protection.
After the second application of Sika® Antisol®-90, place 50 mm polystyrene board onto the repair area to prevent rapid heat loss. Keep the insulation board in place for as long as practically possible.
Allow the repair mortar to harden for at least 2 hours before any load is applied.
CLEANING OF TOOLS
Clean all tools and application equipment with water immediately after use. Hardened or cured material can only be mechanically removed.