Pumpable Shrinkage Compensated Cementitious Grout
Obaproof Oba Grout 2215 is a pumpable dual-shrinkage compensated, selflevelling, pre-bagged cementitious grout with extended working time to suit local ambient temperatures.
Uses:
Obaproof Oba Grout 2215 is suitable for repairs to the following concrete structures:
• Machine foundations
• Columns in precast construction
• Cavities
• Concrete anchors
• Gaps
• Bridge bearings
• Recesses
• Honeycombs (pre-packed grouting)
• Rail beds
Obaproof Oba Grout 2215 is suitable for grouting works with clearances as low as 5mm.
Characteristics / Advantages:
• Easy to mix and apply
• Good flow characteristics
• Rapid strength development
•Dense and non-shrink (2 step expansion- Gaseous expansion in plastic stage & crystalline
• High ultimate strengths
• Extended working time expansion in hardened stage)
• Impact resistant
* Good pumping properties
• Non-corrosive
• Non-toxic
• Tested for compatibility with drinking water, PSB report 57S030976-SLE-2
• Chloride free
Substrate Quality / Pre-Treatment:
The substrate should be prepared by suitable mechanical preparation techniques such as high pressure water, breakers, grit blasting, scabblers, etc.All absorbent surfaces must be well saturated with clean water, but free of any surface water or puddles prior to the application of Obaproof Oba Grout 2215.Concrete, mortar and stone surface must be sound, clean, free from frost, oils, grease, standing water and all loosely adhering particles and other surface contaminants, Metal surfaces (iron and steel) Surfaces should be clean, free from scale, rust, oil and grease.
Mixing:
Place about 70-80% of the pre-measured clean water (depending on consistency required-refer to "Mix Ratio" ) into a clean container and gradually add the whole bag of Obaproof Oba Grout 2215 into it while continuously mixing, Add the remaining water and continue mixing until the desired consistency is obtained. Mix for 2-3 minutes with a slow speed drill and paddle (-500rpm).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 Obaproof Oba Grout 2215 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, Obaproof Oba Grout 2215 may be pumped using heavy duty diaphragm pumps. Screw feed and piston pumps may also be used.
