40 mm Metal
crushed stone
40 mm crushed stone — the large-size coarse aggregate for mass concrete, road sub-base, gabion fill, and any pour where reducing cement content matters more than fine surface finish.
About 40 mm Metal
IS 383:2016 coarse aggregate, nominal max size 40 mm. The large size reduces cement content per cubic metre, which matters for mass pours where heat of hydration is a concern. Standard MoRT&H acceptance limits apply for road work.
Where 40 mm Metal fits — and where it doesn't
Specifying the right aggregate size and grade saves cement, simplifies placement, and avoids rework. Below is a quick guide based on IS / MoRT&H norms and what we see ordered from our Chimakurthy crusher across Prakasam district.
Use 40 mm Metal for
- Mass concrete pours (dam sections, large foundations, heavy retaining walls)
- Road sub-base layer (where MoRT&H spec allows 40 mm)
- Backfill for retaining walls and abutments
- Gabion box fill and rip-rap protection works
- Foundation pads for heavy industrial equipment
- Lean concrete for trench fills
Don't use 40 mm Metal for
- Standard RCC structural elements (use 20 mm)
- Sections thinner than 200 mm
- Pumping or congested-rebar work
Common questions about 40 mm Metal
When do I need 40 mm aggregate instead of 20 mm?
Can I use 40 mm aggregate in a residential slab?
40 mm Metal supplied across Ongole and Prakasam district
40 mm Metal is loaded ex-works at our Chimakurthy crusher for projects across Ongole and the wider Prakasam district. The distance shown against each town is the pickup distance from the crusher gate — tap any town for project-specific notes and round-trip times.