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Ecocem incorporated directly in the concrete mixer provides the concrete with excellent durability and a high degree of strength over the long term


our Ecocem

Ecocem ground granulated slag is manufactured under a fully controlled process, by drying and fine-grinding the raw material, granulated slag. This is a secondary material co-produced with cast iron by the blast furnaces of ArcelorMittal at Fos sur Mer.

Packaging: bulk and big bags on request.

It is used:

  • In concrete mixes as a substitute for type I and II cements, as a type II pozzolanic or latent hydraulic additive within the meaning of the national appendices to NF  EN 206-1/CN or as a grain modifier;
  • In the mix for cement surface preparations;
  • With bentonite for producing special foundations, soil reinforcements, etc.;
  • As a base for hydraulic binders for roads or for road gravel;
  • For treating agricultural materials (hemp, rapeseed, etc.) to improve their resistance to water penetration, mildew and their reaction to fire.
  • In combination with marine sediments.

Ecocem R + is an additive based on ground granulated slag. It allows quick grip and hardening while providing an excellent environmental balance, clearness of the siding and a decrease in blooms. It is particularly recommended in the prefabrication, in the Making of borders and blocks for example.

Packaging: bulk

It is used as an additive in unreinforced concretes.




The geotechnical binder is a binder composed mainly of Ecocem ground slag. It is used in all types of foundations. It is particularly suitable for underground work and works subjected to chemical aggressions such as sulphates, sea water, pure water and acids.
Thanks to its specific composition, it brings excellent durability. It also allows the reinforcement of soils and their valuations by improving their geotechnical characteristics. Its use also contributes to the reduction of the solubility of residues such as chlorides, sulphates and fluorides.

Packaging:  bulk.




The CPI Binder is intended for the prefabrication of unreinforced concrete products in immediate or deferred moulding.
It completely replaces the CEMI Portland cement mixtures or the Portland cement compound CEM II with Ecocem ground slag or other additions. It is used alone in the mixer with aggregates, water and any additives.
It has an excellent environmental record, while contributing to the decrease in blooms.



Health and safety

Ecocem is a fine powder with an especially limited pollution risk. Chemically stable, Ecocem is not liable to release products harmful to the environment or for health. As Ecocem is a very fine abrasive powder, precautions must be taken when handling in order to avoid irritating the eyes, mouth, nose and mucous membranes in general.

Ecocem does not contain soluble chromium (Cr VI).

The risks of contact dermatitis are non-existent and consequently, Ecocem must not be pre-treated chemically before use in compliance with Directive 2003/53/EC of January 2005.

In addition, Ecocem does not contain quicklime.

Storing and handling Ecocem: Ecocem is stored in silos and transported under the same conditions as other cements.

SDS EF 21032018-vENG

quality and standards

Ecocem complies with European standard NF EN 15167-1, 2006: Ground granulated blast furnace slag for use in concrete, mortar and grout.

Part 1: Definitions, specifications and conformity criteria.

Ecocem has benefited from CE marking since 7th March 2011. The assessment and monitoring of production controls are carried out by an independent accredited body. GGBS is covered by a 1+ quality control system, the highest verification level in the construction materials sector, a level equivalent to that used for cement manufacture. Checks on the chemical, physico-chemical and physico-mechanical characteristics of the GGBS are carried out before it is sold. These act as a continuous guarantee of the quality of the material and the regularity of its performance.

It is the best classified of the ground granulated blast-furnace slags. Indeed, its characteristics comply with class A, the most stringent class as defined in concrete standard NF  EN 206-1/CN.

Ecocem is characterised by :

  • Its fineness expressed by the Blaine Specific surface area, which equates to the total developed surface area of all Ecocem grains contained in 1 gram of cement.
  • Its chemical modulus (CaO+MgO)/SiO2.
  • Its activity indexes at 7 days and 28 days. These are the ratios (as a percentage) of the compression strength of mortar prisms made up of 50% by weight of test cement and 50% by weight granulated slag, relative to the compression strength of equivalent mortar prisms made up of 100% test cement tested at 7 days and 28 days.

These values are regularly measured by the quality laboratories of ECOCEM France and by independent accredited laboratories.

The pH of Ecocem measured by the LERM labotory according to NF ISO 10390 is 10.89, so it is considered NON-IRRITATING (<11.5).

class ABC







Ecocem class


Environmental indicators



The environmental analysis – from the cradle to gate – of GGBS Ecocem  according to standard NF EN 15804 has been conducted by the company ECOREVIEW, and verified by a third party, IVAM BV UVA. The Simapro 8.0.1 software was used and the inventory lifecycle Ecoinvent v3.0 for transportation and upstream and downstream processes was applied.

The global warming indicator is shown below.

The complete analysis is available in page document download section ecology.

Comparison with OPC :

Preventing the depletion of natural resources

As Ecocem comes from a secondary material, using one tonne of Ecocem instead of one tonne of Portland CEM cement avoids the extraction of 1.3 tonnes of clay and limestone.

CO2 emissions avoided

38 times less CO2 is discharged in manufacturing a tonne of Ecocem compared with 1 tonne of Portland cement CEM I. Whenever we replace Portland cement by Ecocem it avoids emissions CO2. It’s good for the planet!


Global warming indicator

Global warming indicator


environmental indicators scheme 2

Chemical characteristics

This is essentially made up of the major oxides CaO, SiO2, Al2O3 and MgO. 

These oxides are also present as the major components in the chemical identity card of Portland cement with only Fe2O3 added as a component of clinker.

However, the proportions differ between the two types of binder, GGBS and CEM I Portland as shown in the table below which shows the average contents in major oxides.

GGBS contains less than 1% crystalline silica. There is no soluble chromium (Cr VI), or free lime.

Physical caracteristics

Density 2.90 ± 0.03 tonnes/m3

Apparent density: 0.82 ± 0.04 tonnes/m3


The luminance of Ecocem is subject to regular checks. It is measured in compliance with the International Commission on Illumination (CIE) 1976 area.  As for all systems from the CIE XYZ system, it characterises a colour using one intensity parameter relating to the luminance and two chrominance parameters which describe the colour. It was specially designed so that the distances between colours relate to the differences perceived by the human eye.

The Ecocem colour index [CIE L*ab] is 91.5 ±2



luminance 3

Laitier moulu Ecocem

Manufacturing GGBS

The raw material of GGBS is the secondary material from the manufacture of cast iron. The iron ore mainly consists of silica, iron and aluminium oxide, and flux (lime (CaO) and dolomite (MgO)) are added at high temperature (1400 to 1600°C) in a blast furnace.

Cast iron is obtained by this smelting operation. The liquefied gangue of the ore, of a lower density, comes to the surface of the molten cast iron and is recovered in a separate run-off. At the outlet from the blast furnace, this gangue – the blast furnace slag – is cooled suddenly by quenching, generally by high pressure water jets. As a result of this rapid lowering of temperature, the slag solidifies and forms granules of a dimension comparable to sand (less than 5 mm):  the material obtained, granulated slag, is vitreous and has latent hydraulic properties.

The GGBS obtained by drying and subsequent grinding of the granulated slag, is a fine powder with a Blaine specific surface area of between 400 m2/kg and 600 m2/kg under standard production conditions.

History of GGBS

history 3

Performance demonstrated everywhere since the 19th century

A few key dates are useful in retracing the timeline of ground granulated slag up to its recent use as a component of concrete in the same way as standard cements.

In 1862: the German Emil Langen, Director of the Friedrich Wilhelm foundry at Troisdorf, discovered the hydraulic properties of slag in its granulated or vitrified form.

In 1865: Once the vitrified form existed, the German iron and steel industry developed its own manufacturing processes of hydraulic binders consisting of a mix of lime and ground granulated slag along the lines of Langen’s discovery.

In 1882: Faced with this competition to Portland cements, the German Prussing, helped by the studies of Dr Michaelis, Professor E. Dietrich and the Swiss Professor Tetmajer, introduced from 1882, granulated slag in a cement works not associated with the iron and steel industry. The slag was mixed with clinker in any proportion from 5% to 95% giving the whole range of standardised slag cements.

In 1889: The first metallurgic cements were manufactured in France. An “event” marked out the construction industry in France: the construction of the Paris Metro. The concrete used for this project, daring for its time, was formulated using ground granulated slag.

In 1896: Outside Europe, the US also discovered the benefits of incorporating slag in concretes: slag cements appeared on the American market.

20th century: The use of granulated slag continued and its use was generalised in the concrete for structural components for a wide range of applications.

In Europe, the huge growth in the number of blast furnaces in Europe helped to ensure a continuous supply of granulated slag: the cement industry became a valuable partner to the iron and steel industry which found a way of getting rid of a secondary material which was considered at the time to be “of no added value”. It was mainly as a clinker that the use of granulated slag entered the cement industry.

21st century: Blast furnace slag in ground form underwent a significant industrial growth due to its recognised ability to be used as a concrete additive. Granulated slag was no longer used upstream of concrete manufacture, i.e. as a component of cement, but added downstream in the concrete mixer as a component of concrete recognised for bringing to the concrete increased strength over the long term along with much greater durability.

In 2002: Production and marketing of ground granulated slag in The Netherlands by ORCEM BV.

In 2003: Production and marketing of ground granulated slag in Ireland by ECOCEM Ltd.

In 2009: Production and marketing of ground granulated slag in France by ECOCEM France SAS.

Taking environmental considerations into account, the very low environmental impact of GGBS makes it an essential material in eco-friendly building. The production of a tonne of GGBS emits of the order of 20 kg of CO2, i.e. 38 times less than type CEM I or CEM II Portland cement, and avoids the extraction of 1.3 tonnes of raw materials. A material which has everything going for it to win over specifiers, project owners, contractors, construction companies and the concrete industry.

safety data sheets


Our safety data sheets provide information on the physical properties, toxicity, effects on health, first-aid measures, reactivity, storage, disposal and protective equipment required along with measures to be taken when pouring our product.

Safety data sheet available to download

MSDS Ecocem-26112015

Espanol :FDS Ecocem 26112015-vEsp

Italiano :SDS EF 26112015-vITA

French :FDS Ecocem 26112015-VF



Experts from Ecocem France are available.


ECOCEM France SAS - Horizon Sainte Victoire - Bâtiment A – Parc de la Duranne - 970, rue René Descartes - 13100 AIX EN PROVENCE
Tél. 04 42 90 76 30 - Fax. 04 42 90 76 39
Société par Actions Simplifiée au capital de 9 000 000 €
SIREN. 500 943 733 R.C.S Aix en Provence - TVA. FR 26 500 943 733