IS 2572:2005 is the Indian Standard (BIS) for construction of hollow and solid concrete block masonry - code of practice. This standard provides comprehensive guidelines for the construction of load-bearing and non-load-bearing walls using solid and hollow concrete blocks. It outlines procedures for material selection, mortar proportioning, block laying techniques, jointing, and curing to ensure structural stability and mitigate shrinkage cracks.
Construction of hollow and solid concrete block masonry - Code of practice
BIM-relevant code. See the BIM Hub for ISO 19650, IFC, and LOD/LOIN frameworks used alongside it.
| Parameter | IS Value | International | Source |
|---|---|---|---|
| Nominal Mortar Joint Thickness | Shall not exceed 10 mm. | 3/8 in. (9.5 mm) is nominal. Acceptable range is 1/4 in. to 1/2 in. (6.4 mm to 12.7 mm). | TMS 602-16 |
| Mandatory Curing Period | Keep continuously moist for a minimum of 7 days. | No fixed period. New masonry to be kept damp for at least 24 hours if specified. Primary focus is on protection. | TMS 602-16 |
| Mortar Re-tempering (adding water) | Not permitted. | Permitted to maintain consistency, provided mortar is used within 2.5 hours of initial mixing. | TMS 602-16 (via ASTM C270) |
| Max Slenderness Ratio (Load-bearing wall) | 27 (for walls >90mm, up to two storeys, specific mortars). | 20 (for empirically designed, unreinforced bearing walls). | ACI 530-13 / TMS 402-13 |
| Construction Tolerance (Plumb) | Max 6 mm in any storey height. | Max 1/4 in. (6.4 mm) in 10 ft (3.05 m). | TMS 602-16 |
| Max Depth of Horizontal Chase | 1/3 of the wall thickness. | 1/8 of the wall thickness (for a single leaf wall). | BS EN 1996-2:2006 |
| Mortar Usable Life | To be used within 2 hours of mixing. | To be used within 2.5 hours of mixing. | TMS 602-16 (via ASTM C270) |