IS 16298:2014 is the Indian Standard (BIS) for repair and rehabilitation of concrete structures - methods and materials. This standard provides comprehensive guidelines on the methods and materials for the repair and rehabilitation of existing concrete structures. It covers damage assessment, selection of appropriate repair materials, and application procedures for various techniques like patching, grouting, and strengthening.
Details various methods and materials used for the repair and rehabilitation of concrete structures.
BIM-relevant code. See the BIM Hub for ISO 19650, IFC, and LOD/LOIN frameworks used alongside it.
| Parameter | IS Value | International | Source |
|---|---|---|---|
| Bond Strength (Pull-off) | No specific value mandated, but mentioned as a key property. Desirable value >1.5 MPa is often cited. | ≥ 1.5 MPa (for Class R3 structural mortar); ≥ 2.0 MPa (for Class R4) | EN 1504-3 |
| Clearance Behind Corroded Rebar | Minimum of 20 mm to 25 mm clearance behind the bar. | Minimum of 3/4 in. (approx. 19 mm) clearance behind the bar. | ACI 546R-14 |
| Compressive Strength of Repair Mortar (28 days) | Should be compatible with the parent concrete, typically equal to or slightly higher. No specific classes defined. | Classified: e.g., Class R3: ≥ 25 MPa; Class R4: ≥ 45 MPa | EN 1504-3 |
| Chloride Ion Content (in dry repair material) | Not explicitly defined for the repair product itself; relies on general concrete code (IS 456) principles. | ≤ 0.05% by mass of the dry components. | EN 1504-3 |
| Capillary Absorption of Repair Mortar | Listed as an important property for durability but no quantitative limit is specified. | ≤ 0.5 kg·m⁻²·h⁻⁰·⁵ | EN 1504-3 |
| Minimum Edge Depth for Patch Repair | At least 10 mm deep, saw-cut, perpendicular edges. Feather edging is to be avoided. | Perimeter should be saw-cut to a depth of at least 1/2 in (13 mm) and not feather-edged. | ICRI 310.1R-2008 |
| Elastic Modulus Compatibility | Recommends that the modulus of elasticity of the repair material should be lower than or equal to the parent concrete. | Recommends a lower modulus for repair materials to reduce stress concentrations, although EN 1504-3 includes classes for both flexible and rigid mortars. | ACI 546R-14 / EN 1504-3 |