Notes from the quarry floor

What we would tell a project manager or a site engineer on the phone, written down once. Gradings, tests, plant, rock, haulage and the paperwork around them.

Articles: 50
Topics: 8
MoRTH GSB · WMM: 401 · 406
Working since: 2000

06 articles

Crusher plants

You need crushed stone at the road head. Not a crusher, not a plant manager, not a spares inventory. We bring all three and hand you material.

Crusher Plant Operations

Own a crusher plant or contract the crushing? How highway contractors decide
A crusher plant is the smaller half of what you buy. The larger half is a crew, a spares store, a set of consents and a machine that has to go somewhere when the road is finished.
8 min read
What sits inside a per-tonne crushing rate, and what sits outside it
Two crushing quotes rarely differ because one contractor is cheaper. They differ because one rate carries the feed, the diesel or the royalty and the other does not. Line up the scope before you line up the numbers.
7 min read
How to choose a crushing contractor: twelve questions worth asking
A crushing contractor is easy to judge after six months on site and hard to judge before the order. These twelve questions bring the six-month answer forward, and they apply to us as much as to anyone else.
7 min read
Setting up a stone crusher plant on a highway site: the first 30 days
On a site with reasonable access, a contracted crusher plant is in steady production about a month after the order. When it runs late, the cause is rarely the steel.
7 min read
Mobile or stationary crusher plant: which suits a highway package
A mobile crusher wins on the day it arrives. A fixed three-stage plant wins over the eighteen months that follow. Which of those matters more depends on how long the job is and how many places the rock comes from.
7 min read
Consents and clearances a stone crusher plant needs in India
A crusher plant can be erected in a fortnight and then stand for months waiting on a consent. The permissions come from several offices, attach to the plant at that location, and are best divided in writing before mobilisation.
7 min read

09 articles

Crushing

Three-stage plants at 250 to 350 TPH, turning shot rock into GSB, WMM and clean 40, 20 and 10mm chips that pass the grading in the site engineer's file.

Stone Crushing & Aggregate Production

09 articles

Aggregate supply

Material off our plants, on our tippers, to your road head. Priced per tonne delivered, with a weighbridge slip against every load.

Aggregate Supply

06 articles

Mining

Taking a lease from bare ground to a working face: overburden off, rock down, material moving. Twenty excavators and the crews who run them.

Mining Operations

04 articles

Drilling

Ten drilling machines with compressor support, putting holes where the blast design says they go, to the depth and angle it says.

Drilling Services

06 articles

Blasting

Licensed shotfirers, a design for the rock in front of them, and vibration monitored on every shot. Breaking overburden and rock without breaking anything else.

Controlled Blasting

06 articles

Earthwork

Clearing, cutting, embankment, sub-grade and compaction. Getting a road formation to the level and the density the drawing calls for.

Earthwork & Excavation

04 articles

Transport

Fifty-five tippers, trailers and the drivers to run them. Moving material between plant and road head, and moving plant between states.

Transportation & Logistics

Get a rate

Tell us what your site needs

Four things and we can quote it. Send it before 6pm on a working day and you will hear back the same day.

Where · What · How much a month · When

Request a rate WhatsApp

Notes from the quarry floor

Crusher plants

Own a crusher plant or contract the crushing? How highway contractors decide

What sits inside a per-tonne crushing rate, and what sits outside it

How to choose a crushing contractor: twelve questions worth asking

Setting up a stone crusher plant on a highway site: the first 30 days

Mobile or stationary crusher plant: which suits a highway package

Consents and clearances a stone crusher plant needs in India

Crushing

GSB material: gradings I to VI, tests and laying under MoRTH Clause 401

Wet Mix Macadam (WMM): grading, mixing and laying under MoRTH Clause 406

GSB vs WMM: the difference, and why a road needs both

Flakiness and elongation index: the limits, the test and what the crusher has to do with it

Aggregate tests for highway work: impact value, abrasion, crushing value and water absorption

Sieve analysis: how to read a grading table and a failing result

Jaw, cone and VSI: what each stage of a three-stage crushing plant does

Jaw plates, cone liners and screen mesh: what wears on a crusher and what it costs in downtime

Crusher dust, M-sand and river sand: what is the difference?

Aggregate supply

GSB, WMM and aggregate supply around Prayagraj: where the stone comes from and what decides the rate

10mm, 20mm and 40mm aggregate: which size goes where

How much GSB and WMM does a kilometre of road need?

Tonnes, cubic metres, brass and cubic feet: converting aggregate quantities

Layers of a highway pavement, from sub-grade to wearing course

Lead distance: why the same aggregate costs more 40 km down the road

Aggregate rate contracts: what to fix and what to leave floating

Weighbridge slips and month-end reconciliation: getting billed for what arrived

Royalty and transit passes: the paperwork that rides with a load of aggregate

Mining

Opening a stone quarry face: from bare ground to the first tonne

Bench height, width and face angle in a stone quarry: what the regulations say

Quarry lease, mining plan and environmental clearance: how stone is permitted in India

Basalt, granite, sandstone, limestone: how the rock changes the crushing

Overburden and stripping ratio: the tonnes you move before the tonnes you sell

Monsoon on a quarry and crusher site: what stops, what slows and how to plan for it

Drilling

Blast hole drilling: burden, spacing, depth and sub-drilling explained

DTH, top hammer or wagon drill: choosing a rock drill for a quarry

Hole deviation: how two degrees at the collar becomes oversize at the hopper

What decides rock drilling cost per metre

Blasting

What is controlled blasting? Pre-splitting, smooth blasting, muffling and delays

Ground vibration limits for blasting in India: the DGMS table and how to stay inside it

Blasting near houses, roads and structures: what changes in the design

Explosives licences and shotfirers: who is allowed to blast in an Indian quarry

Flyrock: what causes it and how a blast is designed to prevent it

Fragmentation: why the blast decides what the crusher produces

Earthwork

Embankment and sub-grade compaction: what 95% and 97% of MDD mean on site

Field density test by sand replacement: the procedure and what a failing result tells you

CBR explained: the test, the number and what it does to pavement thickness

Cut and fill: balancing earthwork and reading a mass haul diagram

Building a quarry haul road: width, gradient, drainage and why it pays

Clearing and grubbing: what MoRTH Clause 201 covers and how it is measured

Transport

How much does a tipper carry? Legal payloads, body sizes and the overloading rules

How many tippers does a plant need? Working it out from cycle time

Moving a crusher plant between states: low-beds, ODC permits and re-erection

Own tippers or market hauliers: who should carry your aggregate

Tell us what your site needs