All our khadi is VSI-crushed: shaped in a vertical shaft impactor so the pieces come out more cube-like and less flaky. 6mm to 40mm, delivered across Mumbai, Navi Mumbai and Panvel.
About VSI khadi
VSI stands for vertical shaft impactor, the shaping stage after the main crushers. Its rotor throws stone at high speed into a chamber where rock hits rock, knocking off sharp corners. Screens then split the output into sizes. The result is khadi with a better shape – the rock itself is unchanged, so strength still comes from the parent stone.
✓ 6mm (grit)
✓ 10mm (metal 1)
✓ 20mm (metal 2)
✓ 30mm and 40mm
✓ VSI sand (crushed sand, a little dearer than normal crushed sand)
Process: VSI crushing, then screening
Sizes: 6mm, 10mm, 20mm, 30mm, 40mm + VSI sand
Shape limit: flaky + elongated ≤40% (IS 383); ≤35% for WMM and WBM (MoRTH)
Shape definitions: flaky 1.8× (IS 2386-1, from 6.3 mm)
Other IS 383 limits: fines ≤1% (<75 µm), clay lumps ≤1%
Sold by: brass or tonne · minimum 6 brass (or 25 tonnes)
These are the limits in the standards – what to ask for – not test results for a particular load.
How VSI works
Shape is the one thing a VSI changes – and it's the one thing the standards limit.
A VSI rotor throws stone at high speed into a chamber where rock hits rock.
Repeated impacts break off sharp corners, so particles come out more cube-like and less flaky.
IS 2386: flaky if thinner than 0.6× its size; elongated if longer than 1.8× its size.
IS 383 caps flaky plus elongated at 40% for concrete; MoRTH caps it at 35% for WMM and WBM.
VSI changes particle shape, not the rock. Strength still comes from the parent stone.
After shaping, screens split the output into sand and 6, 10, 20, 30 and 40 mm sizes.
Straight answer
We describe VSI khadi by its shape only. Strength, mix and size still need the usual checks.
Particle shape: sharp corners knocked off.
The share of flaky and elongated pieces, which IS 383 and MoRTH limit.
Fines are sorted out afterwards by screening.
The parent rock's strength and hardness (IS 383 tests the stone).
The need for the right size and grading for your job.
Your engineer's mix design.
Quality checks on site
Quick checks anyone on site can do. Lab tests to IS 2386 are what the standards use.
Flaky means thinner than about 0.6× the piece's size; elongated means longer than about 1.8×. A handful shouldn't be mostly flat slivers.
Pick up a handful. Most pieces should match the size you ordered, with no stray oversize chips or soil lumps.
No soil, roots, coal bits, mica flakes or shells – IS 383 lists these as harmful.
Measure the truck body (length × width × height in feet ÷ 100 = brass) or ask for the weighbridge slip on tonne orders.
How to order
Tell us the size and quantity; we confirm the delivered rate and the slot.
Call +91 86918 59278 or WhatsApp the material, size, quantity (minimum 6 brass or 25 tonnes) and your site location. Prefer writing? Use the enquiry form.
We quote per brass or tonne, delivered – indicatively ₹3,000–₹6,000 per brass across our materials (October 2026), depending on delivery distance, quality and type of material. Wholesale rates and a GST invoice on every load.
We work 24/7 and same-day delivery is available across Mumbai, Navi Mumbai and Panvel. Mumbai drops follow the city's heavy-vehicle timings, so confirm the slot when you call.
FAQs
What does VSI mean?
Vertical shaft impactor: a crusher whose spinning rotor throws stone against other stone, knocking off sharp corners. It's the shaping stage after the main crushers.
Is VSI khadi stronger than normal khadi?
Its shape is better; the rock isn't different. Strength comes from the parent stone, which IS 383 checks with crushing, impact and abrasion tests. VSI mainly reduces flaky and elongated pieces.
Which sizes of VSI khadi do you supply?
All our khadi is VSI-crushed: 6mm grit, 10mm (metal 1), 20mm (metal 2), 30mm and 40mm. We also supply VSI sand, which costs a little more than normal crushed sand.
Is VSI khadi the same as cubical aggregate?
Yes, that's the same idea: "cubical" describes the shape a VSI gives – fewer flat, flaky pieces. It isn't a separate grade in IS 383.
What is the minimum order?
6 brass (or 25 tonnes) per delivery. Call or WhatsApp with your quantity and site location and we confirm the delivered rate.
Do you deliver today, or at night?
We work 24/7 and same-day delivery is available across Mumbai, Navi Mumbai and Panvel. Mumbai deliveries follow the city's heavy-vehicle timing windows, so confirm your slot when you call. Every load comes with a GST invoice.
Call +91 86918 59278 or WhatsApp us for today's delivered rate – open 24/7. You can also send the enquiry form or email hello@yadavstone.com.
