Davco 702 MY
Davco 702 MY is a premixed cementitious non-shrink, high strength grout containing cement, sand and additives
- High compressive strength
- Non-shrink
- Good workability
- High fluidity
- Pumpable
Usage
Davco 702 MY is suitable for repairs to the following concrete structures:- Grouting machine foundations
- Installing rebars and anchor bolts
- Filling gaps between precast panels (RC structures)
- Filling cavities
- Rail beds
- Recesses
Advantages
- High compressive strength
- Non-shrink
- Good workability
- High fluidity
- Pumpable
Packaging
25 kg bag
Colour
Grey powder
Product Details
Shelf life
6 months from date of production
Storage conditions
Store in dry conditions. Keep away from rain, water and moisture. Protect from direct sunlight.
Maximum grain size
2.0 mm
Compressive strength
| Flowable | Pourable | |
| 1 day | > 25 MPa | > 30 MPa |
| 7 days | > 45 MPa | > 50 MPa |
| 28 days | > 60 MPa | > 65 MPa |
Expansion
| 0.6–1.5 % at 24 hours | (ASTM C940) |
Application
Mixing ratio
| Flowable consistency | 4.1–4.4 L of water per 25 kg bag |
| Pourable consistency | 3.7–4.0 L of water per 25 kg bag |
| Stiff consistency | 3.0–3.4 L of water per 25 kg bag |
Fresh mortar density
~2.2 kg/l (depending on consistency and temperature)
Layer thickness
5 mm min. / 50 mm max. per pour
Flowability
| Flowable consistency | Pourable consistency | |
| Flow cone | ~280 mm | ~250 mm |
Ambient air temperature
+10 °C min. / +40 °C max.
Substrate temperature
+10 °C min. / +40 °C max.
Yield
| Flowable consistency | Pourable consistency | |
| Davco 702 MY | 25 kg | 25 kg |
| Water | 4.1–4.4 L | 3.7–4.0 L |
| Yield | 13.4 L | 13.2 L |
MIXING
Place about 70–80 % of the premeasured clean water (depending on consistency required - refer to “Mix Ratio”) into a clean container and gradually add the whole bag of Davco 702 MY into it while continuously mixing. Add the remaining water and continue mixing until the desired consistency is obtained. Mix for 2 to 3 minutes with a slow speed drill and paddle (~500 rpm).
For large quantities mixing, the use of a forced-action mixer of rotating pan, paddle or trough type is preferred. Free fall mixers should not be used.
APPLICATION
Use Davco 702 MY for grouting only.
After mixing, stir lightly with a spatula for a few seconds to release any entrapped air. The grout is then poured immediately into the prepared formwork.
When carrying out baseplate grouting, ensure sufficient pressure head is maintained for uninterrupted mortar flow. For formwork repair, the prepared formwork must be firmly in place and kept watertight.
When placing grout over a large area, it is important to maintain a continuous flow throughout. Work sequence must be properly organised to ensure an uninterrupted flow. In large areas, Davco 702 MY may be pumped using heavy duty diaphragm pumps. Screw feed and piston pumps may also be used.
Specific Areas of Application
- Grouting under baseplate - pourable consistency
- Formwork grouting (example deep honeycombs, column reinforcements, etc.
- pouring method - flowable / pourable consistency
- prepacked method - flowable consistency.
- Grouting anchor bolts - stiff consistency
- Grouting large volumes - for sections thicker than 50 mm, it is necessary to fill Davco 702 MY with graded 10 mm silt free aggregates to minimise temperature rise generated during the curing stage. The quantity of aggregates should not exceed 1 part aggregates to 1 part Davco 702 MY by weight. For such mixes, a conventional concrete mixer and pump may be used. To further ensure that air entrapped during mixing is allowed to fully escape, it may be necessary to make breather holes. Use steel rods or chains to assist the flow of the grout where necessary.
CURING TREATMENT
On completion of the grouting operation, exposed areas should be thoroughly cured. This should be done by the use of Sika® Antisol® E curing compound, continuous application of water and / or wet hessian.