20mm Aggregate (20mm Jelly) is the standard large-size coarse aggregate for foundations, thick slabs, mass concrete, and infrastructure works. The larger particle size reduces the cement and fine aggregate requirement, giving a more economical mix for bulk concrete pours. Produced from hard crushed granite and graded to ISI:383, 20mm jelly is widely specified by structural engineers for foundation concrete, plinth beams, and mass concrete fills.
Available in bulk supply across Chennai, Chengalpattu, Kanchipuram, Thiruvallur, and all of Tamil Nadu. Delivered directly to your construction site in 24–48 hours. GST invoice provided on every order.
| Nominal Size | 20mm (16mm to 25mm) |
| Standard | ISI:383 |
| Grading | Single Size / Graded |
| Aggregate Impact Value | < 30% |
| Water Absorption | < 2% |
| Los Angeles Abrasion | < 35% |
| Flakiness Index | < 25% |
| Shape | Angular (crushed granite) |
| Colour | Dark grey |
| Supply Unit | Per Load (Approx. 8–9 MT) |
- ✓Economical for thick foundations — lower cement content needed
- ✓Strong granite aggregate — high crushing value
- ✓Standard specification for most foundation concrete
- ✓Reduces overall concrete cost for mass pours
- ✓ISI:383 compliant — accepted by all structural engineers
Looking to buy 20mm Aggregate in Chennai at the best price? BuildingNeeds.in is an authorised aggregate and M-Sand supplier in Tamil Nadu. We supply 20mm Aggregate in bulk loads (per load of approx. 5–10 MT depending on product) across Chennai, Chengalpattu, Kanchipuram, and all surrounding districts. All products conform to relevant IS and MORTH specifications where applicable. GST invoice on every order.
Call or WhatsApp +91 63996 96363 for today's rate and same-day delivery confirmation.