IS 6061:1971 is the Indian Standard (BIS) for grouting for concrete structures - code of practice. This code of practice covers the materials, equipment, and procedural guidelines for grouting in concrete structures. It details various grout mixes, including neat cement, cement-sand, and chemical grouts, and outlines the operational steps from preparation to injection for repair, strengthening, and filling voids.
Provides a code of practice for grouting of concrete structures for various purposes like crack repair and void filling.
| Parameter | IS Value | International | Source |
|---|---|---|---|
| Minimum Compressive Strength (28 days) | 17.5 N/mm² (175 kgf/cm²) | Grade A: 34 MPa (5000 psi), Grade C: 55 MPa (8000 psi) for pre-packaged grouts. | ASTM C1107 |
| Water/Cement Ratio (Post-Tensioning) | Not to exceed 0.5, 'as low as possible' | Maximum w/cm ratio of 0.45 | PTI M55.1-12 |
| Fluidity Test | Flow cone test; time is specified based on mix (e.g., 35-45 sec for 1:2 cement-sand). | Flow cone (ASTM C939); efflux time of 11 to 30 seconds before injection. | PTI M55.1-12 |
| Bleed Test Limit | Should be 'minimum'; no quantitative limit or specific test method given. | Max 2% at 3 hrs, 4% total; 0% after 24 hrs (reabsorbed). Measured per ASTM C940. | PTI M55.1-12 |
| Volume Change (Expansion) | Mentions use of expanding agents but provides no quantitative limit. | 0.0% to 0.3% expansion at 28 days (for nonshrink grout). | ASTM C1107 |
| Fine Aggregate Size (Sand) | Passing a 1.18-mm IS Sieve. | Generally 1/3 to 1/5 of the narrowest clearance; often controlled by pre-packaged grout manufacturer. | ACI 351.1R-12 |