Description
Characteristics & Advantages
• Easy to mix and apply
• Good flow characteristics
• Rapid strength development
• High ultimate strengths
• Extended working time
• Impact-resistant
• Non-corrosive and non-toxic
• Chloride free
• Dense and non-shrink (2 step expansion- Gaseous expansion in plastic stage & crystalline expansion in hardened stage)
• Good pumping properties
• Tested for compatibility with drinking water, PSB report 57S030976-SLE-2
Application Area
Specific Area of Application:
• Grouting under base plate – pourable consistency
• Formwork grouting (example: deep honeycombs, column reinforcements, etc.) pouring method – flowable consistency
• Grouting anchor bolts – stiff consistency
Pot Life / Shelf life
Shel Life
6 months from the date of production.
Storage
Store properly in original, unopened and undamaged sealed packaging in dry conditions at temperatures between +5C° ~ +35°C. Protect from direct sunlight, rain and water.
Uses
Obaproof Oba Grout 2215 is suitable for grouting works with clearances as low as 5mm.
It is suitable for repairs to the following concrete structures:
• Machine foundations
• Columns in precast construction
• Concrete anchors
• Bridge bearings
• Honeycombs (pre-packed grouting)
• Cavities
• Gaps
• Recesses
• Rail beds
Surface Preparation
• The substrate (stone, mortar, metal, concrete, etc) 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.
• Surface must be sound, clean, free from frost, scale, rust, oils, grease, standing water and all loosely adhering particles and other surface contaminants.
Application
Use Obaproof Oba Grout 2215 for grouting. After mixing, stir lightly with a spatula to release air, then pour immediately into the prepared formwork. For baseplate grouting, maintain sufficient pressure for uninterrupted flow. Ensure formwork is firmly in place and watertight. For large areas, maintain a continuous flow and organize the work sequence properly. Use heavy-duty diaphragm pumps, screw feed, or piston pumps for large-scale applications. For grouting large volumes thicker than 50mm, fill Obaproof Oba Grout 2215 with graded 10mm silt-free aggregates to minimise temperature rise during curing. The aggregate quantity should not exceed 1 part aggregate to 1 part Obaproof Oba Grout 2215 by weight. Use a conventional concrete mixer and pump, and create breather holes to allow air to escape. Use steel rods or chains to assist grout flow if needed.
Curing Time
Curing
If formwork type repair is used, leave the formwork in place for at least 3 days. Upon removal of the formwork, cure the exposed surfaces immediately with approved curing methods.
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 of mixing, use a forced-action mixer or rotating pan. Paddle or trough type is preferred. Free fall mixers should not be used.
Note
• At temperatures below +20°C, setting time and strength development will be slower.
• Non-shrink grout contains additives that expand either during the plastic stage and/or the hardening stage to compensate for the shrinkage of the cementitious matrix. However, this ‘non-shrink’ property will be effective only if the material is not subjected to water loss.
• This is confirmed by a note in the ASTM C 1107 Standard Specification for packaged dry, hydraulic cement grout (non-shrinkable), which clarifies the behaviour of the non-shrink grout when subjected to some drying:
“”Note 1. Since all conditions of use cannot be anticipated. this specification requires non-shrink grout to exhibit no shrinkage when tested in a laboratory controlled moist-cured environment, and requires only the reporting of the observed height change, usually shrinkage when test specimens are subject to some degree of drying.””
Cleaning of Tools
Clean all tools and application equipment with water immediately after use. Hardened and/or cured material can only be mechanically removed.
Others
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Technical Data
“Technical Information:
Compressive Strength
Flowable Pourable (ASTM C 109)
1 day >25N/mm² >30N/mm²
7 days >45N/mm² >50N/mm²
28 days >60N/mm² >65N/mm²
Tensile Strength in Flexure
Flowable Pourable (EN 196-1)
7 days ~7.0N/mm² ~7.5N/mm²
28 days ~7.5N/mm² ~8.0N/mm²
Expansion 0.5% – 1.5% (ASTM C 940) at 24 hours
Application Information:
Mixing Ratio
Consistency Water (L) per 25kg of grout
Flowable 4.0 – 4.4
Pourable 3.6 – 4.0
Stiff 3.0 – 3.4
(for special applications such
as anchoring of starter bars)
Yield
Flowable consistency
1.84kg 25kg 74 x 25 kg bags
Water 0.31L 4.2L 309L
Volume mortar 1L 13.6L 1m³
Pourable consistency
1.90kg 25kg 74 x 25 kg bags
Water 0.3L 4L 303L
Volume mortar 1L 13.2L 1m³
Layer Thickness 5mm min. / 50mm max. per pour
Flowability
Flowable Pourable (ASTM C 230 modified)
Flow cone ~280mm ~250mm
Ambient Air Temperature/Substrate Temperature: +10°C min./+40°C max.
Density: ~2.2kg/l (depending on consistency and temperature)
Maximum Grain Size: 1.2mm”
Safety
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