IS 6509:1985 is the Indian Standard (BIS) for installation of joints in concrete pavements. This code provides practical guidelines for the construction and installation of various types of joints in concrete pavements, including highways, airfields, and industrial floors. It details the methods for forming, sawing, and sealing expansion, contraction, construction, and longitudinal joints to ensure proper pavement performance and service life.
Code of practice for installation of joints in concrete pavements
BIM-relevant code. See the BIM Hub for ISO 19650, IFC, and LOD/LOIN frameworks used alongside it.
| Parameter | IS Value | International | Source |
|---|---|---|---|
| Contraction Joint Saw Cut Depth | 1/4 to 1/3 of the slab depth. | Minimum 1/4 of the slab thickness (D/4), with D/3 recommended in some cases. | ACI 302.1R-15 |
| Dowel Bar Debonding Method | A thin coat of bitumen, grease or other suitable debonding compound. | Fusion-bonded epoxy coating for corrosion resistance, plus a bond breaker applied before concreting. | FHWA-HIF-16-010 |
| Timing of Conventional Sawing | As soon as concrete has hardened sufficiently to prevent ravelling of edges. | Within 4 to 12 hours after placement, depending on concrete mix and ambient conditions. | FHWA-HIF-16-010 |
| Sealant Reservoir Shape Factor (Width:Depth) | Approx. 1:1 for widths up to 12 mm; 1:2 (Width:Depth) for wider joints. | Typically 2:1 (Width:Depth) for self-leveling silicone sealants to minimize strain. | ACI 504R-90 |
| Expansion Joint Filler Thickness | Generally 20 to 25 mm. | Typically 12 to 25 mm (0.5 to 1.0 in), used only to isolate fixed structures. | ACI 302.1R-15 |
| Dowel Bar Alignment Tolerance | Not explicitly quantified in detail; states they should be parallel to the surface and centerline. | ±6 mm (1/4 in) from parallel to the centerline and surface; ±25 mm (1 in) of specified horizontal/vertical location. | FHWA-HIF-16-010 |