Aggregate production
Crushed fine aggregates for high-volume projects in Algeria
SARL ETAHG produces high-quality crushed fine aggregates, also called manufactured sand, at its own quarry and stone crushing plant, Carrière Djellal El Gharbi, at Oued Sdeur near Aïn El Ibel, south of Djelfa. The company extracts the rock itself, with its own drilling and loading equipment, and crushes it on the same site, so it controls the raw material as well as the process. The plant’s crushing and grinding machines are especially suited to projects that require high production rates, such as road programmes, concrete production and large infrastructure sites.
01Product
What fine aggregates are and where they are used
Fine aggregates are the sand-sized part of a granular material: particles small enough to pass a sieve of a few millimetres, commonly 4 mm in European notation. In concrete they fill the spaces between the coarse aggregates and combine with the cement paste; in asphalt they give the mix a dense, stable structure; in road layers they complete the grading so that the material compacts well.
Crushed fine aggregate is made by breaking quarried rock in successive stages and separating the product by size. Because it comes from a known rock source and a controlled process, it can be produced to a consistent grading and in the volumes a large project needs, instead of depending on the uneven supply of natural sand.
- Structural and ready-mix concrete
- Precast concrete elements such as blocks, kerbs and pipes
- Asphalt mixes and surface dressings
- Granular sub-base and base layers of roads and platforms
- Mortars, renders and general building works
02Crushed sand
Crushed sand and natural sand in Algeria
Natural sand in Algeria comes mainly from riverbeds, where extraction is restricted to protect watercourses, or from the dunes of the Sahara. Dune sand is abundant but very fine, rounded and uniform in size. Used alone, it tends to raise the water demand of concrete and to reduce the stability of asphalt mixes.
Crushed sand has angular particles and a wider range of sizes. Engineers use it on its own or blended with natural sand to reach the grading their specification requires. For a project owner, a dependable local source of crushed fine aggregate reduces the risk that concrete or asphalt production stops for lack of sand.
03Process
How a high-output crushing and screening circuit works
A stone crushing plant is a chain of machines linked by conveyors. Each crushing stage reduces the rock and each screen sorts it, until the product has the required size. The stages below describe the general principle of such a circuit.
Feeding
Rock is loaded into a hopper and fed at a steady rate, usually through a vibrating feeder that also removes soil and fine debris before crushing.
Primary crushing
A primary crusher, typically a jaw crusher, breaks the large blocks into pieces that the following stages can handle.
Secondary crushing
Cone or impact crushers reduce the material further and begin to shape the particles.
Fine crushing and grinding
Further crushing and grinding produce the sand fraction and give the grains a compact, cubical shape.
Screening
Vibrating screens separate the products by size. Oversize returns to the crushers in a closed circuit, and excess fines can be removed to keep the sand clean.
Stockpiling and loading
Finished fractions are stockpiled separately, protected from contamination, and loaded onto trucks for delivery.
04Quality
Quality focus areas for fine aggregates
The performance of a fine aggregate depends on a few measurable properties. These are the parameters buyers usually specify; the tests required for each supply are agreed with the client.
- 01
Grading
The distribution of particle sizes, checked by sieve analysis. A continuous, stable grading makes concrete and asphalt easier to design and to reproduce.
- 02
Cleanliness
The quantity and nature of the fines, usually assessed with the sand equivalent and methylene blue tests. Clay fines raise water demand and weaken the bond with the binder.
- 03
Particle shape
Compact, cubical grains pack and compact better than flat or elongated ones. Shape depends mainly on the crushing stages and on how they are fed.
- 04
Consistency
The same product from one delivery to the next, which depends on separate stockpiles for each fraction and on checks during production.
- 05
Parent rock
The hardness and durability of the rock, measured on coarse fractions by tests such as Los Angeles and Micro-Deval, determine where a material can be used in a road.
- 06
Documented supply
The tests required for a project, and the laboratory that performs them, are agreed with the client before supply starts.
05Strengths
Built for high production rates
- Year founded
- 1997
- 01
Own quarry
Rock is extracted at our own quarry and fed to our crusher on the same site, so the raw material is under our control.
- 02
Output for large projects
Crushing and grinding machines suited to projects where high daily volumes of fine aggregate are required.
- 03
On the main corridor
The quarry at Oued Sdeur, near Aïn El Ibel, lies south of Djelfa, a city on the RN1 north–south axis, so material can move toward sites in the north and in the south.
- 04
Own haulage
Our trucks and semi-trailer trucks can deliver to site, so production and transport are planned together.
- 05
Supply and works together
The same company can supply aggregates, earthmoving machines and paving, which simplifies coordination.
06Proximity
Why nearby production matters for high-volume projects
Aggregates are heavy, bulk materials. On large projects, transport can account for a large share of their delivered cost, and every extra kilometre of haulage adds trucks, fuel and wear on the roads used. Producing fine aggregate close to where it is used keeps delivered cost and truck traffic down and shortens the supply chain.
Security of supply matters as much as price. A concrete or asphalt plant that runs out of sand stops, and so does the paving train behind it. Agreeing production and delivery schedules with a producer that controls its own plant and trucks reduces that risk for the whole project.
07Quotation
What to send for an aggregate quotation
A precise request gets a precise answer. Please include:
- Project location (wilaya, nearest town) and delivery point
- Intended use: concrete, precast, asphalt, road layers or other
- Required fractions and specification, if already defined
- Total quantity and expected daily or monthly call-off
- Supply period and start date
- Delivery to site or collection at the plant
Fractions, prices and delivery schedules are confirmed in a written offer for each project.
09FAQ
Questions about aggregate supply
Where is the SARL ETAHG quarry and crushing plant?
The SARL ETAHG quarry and stone crushing plant, Carrière Djellal El Gharbi, is at Oued Sdeur, near Aïn El Ibel, south of the city of Djelfa, in the wilaya of Djelfa. The company extracts the rock at its own quarry and crushes it on site. Djelfa lies on the RN1, the main north–south road between Algiers and the Sahara.
Can ETAHG supply large volumes of fine aggregates?
Yes. SARL ETAHG’s crushing and grinding machines are especially suited to projects that require high production rates. Volumes, fractions and delivery schedules are agreed per project in a written offer.
What is manufactured sand?
Manufactured sand is fine aggregate produced by crushing rock instead of extracting it from rivers or dunes, and it is what SARL ETAHG produces at its own quarry and plant at Oued Sdeur, south of Djelfa. Its angular particles and controlled grading make it suitable for concrete, asphalt and road layers, alone or blended with natural sand.
Can ETAHG’s fine aggregates be used for concrete and asphalt?
The high-quality fine aggregates produced by SARL ETAHG are intended for concrete, precast elements, asphalt mixes and road layers. Suitability for a specific mix is confirmed against the project specification before supply starts.
Which aggregate sizes does ETAHG produce?
SARL ETAHG specializes in fine aggregates, the sand-sized fractions used in concrete, asphalt and road layers. The exact fractions available for a project are confirmed in the quotation.
Can we test the aggregates before ordering?
SARL ETAHG agrees the required tests with each client before supply starts, such as grading, sand equivalent and methylene blue value. Sampling for testing can be discussed once the project details are known.
Does ETAHG deliver aggregates to the site?
Yes. SARL ETAHG can deliver aggregates with its own trucks and semi-trailer trucks. Transport conditions are agreed with each client according to distance, volumes and call-off schedule.
Secure your aggregate supply
Tell us the project location, the use, the quantities and the period of supply.