High early strength, single component, permanent concrete repair material containing migrating corrosion inhibitors. Produces a repair which is dimensionally stable, develops an integral bond to existing concrete, and restores structural integrity within hours of placement.
Five Star Structural Concrete is a high-early-strength, single-component repair material for durable, permanent repairs. It develops strong early compressive and bond strengths, supports placements from 1/4 in to 12 in in a single pour, and offers very low chloride ion permeability for corrosion protection. The mix is pumpable, has a short working time for fast turnarounds, and delivers excellent freeze/thaw durability.
| Working Time (70°F) | ~15 minutes |
| Compressive Strength (ASTM C109) | 3 hr: ~2,500 psi; 1 day: ~5,000 psi; 7 days: ~7,000 psi; 28 days: ~8,000 psi |
| Bond Strength (ASTM C882) | 1 day: ~2,000 psi; 7 days: ~2,500 psi |
| Length Change (ASTM C157) | 28 days wet: +0.05%; 28 days dry: −0.09% |
| Freeze/Thaw (ASTM C666A) | Relative durability modulus: 95% |
| Chloride Ion Permeability (ASTM C1202) | Very low at 28 days |
| Yield per 50 lb Unit | Approx. 0.42 ft³ at max water; ~0.60 ft³ with 60% extension (3/8 in pea gravel) |
| Placement & Extension | Extend with ASTM C33 3/8 in pea gravel for sections >2 in; follow aggregate guidelines |
| Packaging | 50 lb pail (this item); also in 50 lb bag and bulk bag |
| Shelf Life | Two years (pails) or one year (bags) in dry storage |
How long is the working time?
About 15 minutes at 70°F. Plan batching and crew size accordingly.
How deep can I place it?
From 1/4 in up to 12 in in a single pour, following proper formwork and placement practices.
When should I extend with aggregate?
Use 3/8 in pea gravel for sections deeper than 2 in to control heat and improve economy.
How soon can coatings be applied?
Moisture-sensitive coatings are typically applied in 8–24 hours, depending on conditions.
What curing is recommended?
Wet cure for 1–4 hours after final set, based on volume and temperature.
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