Concrete Repair
Microstruct 65
Microstruct 65
High-Performance, Non-Shrink, Cementitious Micro-concrete
hahne MicroStruct 65 is a factory-designed, pourable, shrinkage compensated, high-strength micro-concrete, formulated with selected cement, graded aggregates, and advanced German additives. It is designed for large-section structural repairs and jacketing applications where high flowability, strength, and durability are essential.
- Dual-stage expansion system for true non-shrink performance.
- Excellent flow and pumpability — easy to place without vibration.
- Rapid strength gain enabling early demoulding and load application.
- High ultimate compressive and flexural strength.
- Excellent bond strength with existing concrete substrates.
- Iron and chloride free, non-toxic, and non-corrosive.
- Low permeability and high durability.
- Consistent quality – pre-packed and ready-to-use.
- Structural strengthening by section enlargement and jacketing.
- Repair of reinforced concrete columns, beams, and foundations.
- Restoration of bridges, jetties, dams, and industrial floors.
- Repairs where vibration is difficult or not possible.
- Encapsulation of pile heads and retaining walls.
| Property | Test Method | Result |
|---|---|---|
| Compressive Strength | ASTM C109:2026 |
1 Day ≥ 25 N/mm² 3 Days ≥ 40 N/mm² 7 Days ≥ 50 N/mm² 28 Days ≥ 65 N/mm² |
| Flexural Strength | ASTM C348:2021 | ≥ 6 N/mm² @ 28 Days |
| Tensile Strength | ASTM C307:2023 | ≥ 3 N/mm² @ 28 Days |
| Splitting Tensile Strength | ASTM C496:2017 | ≥ 3.5 N/mm² @ 28 Days |
| Fresh Density | ASTM C138:2024 | 2.20 ± 0.05 kg/L |
| Expansion (Unrestrained) | ASTM C940:2022 | 0 – 2% |
| Drying Shrinkage | ASTM C137:2024 | <0.05% |
| Modulus of Elasticity | ASTM C469:2022 | 28–30 kN/mm² |
| Abrasion Resistance | IS 1237:2012 | 1 mm |
| Resist Chloride Ion Penetration (RCPT) | ASTM C1202:2025 | 961 Coulombs |
| Water/Powder Ratio | — | 0.15 – 0.16 |
| Layer Thickness | — |
Minimum 25 mm / Maximum 100 mm per pour (higher thickness possible with aggregates) |