Is slag dust toxic?
Renal Disease: Some studies show an increased incidence of chronic kidney disease and end-stage renal disease in workers exposed to respirable crystalline silica. Ingestion: Do not ingest slag. Ingestion of small quantities of slag is not known to be harmful, large quantities can cause distress to the digestive tract.
Is Ggbs toxic?
When used and disposed of as intended, no adverse environmental effects are foreseen. In large Quantities the addition of GGBS into water will cause the pH to rise and may reduce oxygen availability, which might be toxic to aquatic life in some circumstances.
Where does GGBS come from?
Ground-granulated blast-furnace slag (GGBS or GGBFS) is obtained by quenching molten iron slag (a by-product of iron and steel-making) from a blast furnace in water or steam, to produce a glassy, granular product that is then dried and ground into a fine powder.
Is steel slag hazardous?
When SSRS compares with ground granulated blast furnace slag (GGBFS) from iron making, steel slag contains toxic ingredients such as nickel, cadmium, chromium and strontium. These compounds could be harmful not only for environment but also for human health [9,10].
Is blast furnace slag toxic?
What are the chemical composition of cement?
The cement contains 35 to 40 percent lime, 40 to 50 percent alumina, up to 15 percent iron oxides, and preferably not more than about 6 percent silica. The principal cementing compound is calcium aluminate (CaO · Al2O3).
What is slag cement disadvantages?
Disadvantages of Blast-Furnace Slag Cement Early Strength is low; therefore, it cannot be used in Reinforced Cement Concrete (RCC) works. As the initial setting time is high, this cement is not used for emergency or repair works.
Why is Ggbs added to concrete?
Durability; GGBS reduces the likelihood of concrete thermal cracking, and it improves concrete’s resistance to damage from alkali-silica reaction, sulphates and chlorides. Concrete in aggressive environments is much more durable with the use of GGBS as a partial replacement for the cement.
Is slag harmful to humans?
Is slag safe for driveways?
Steel slag is not just good for driveways, it is also used by homeowners as a landscaping stone in back yards around a pool area or patio. Hard and durable, steel slag makes a perfect aggregate for covering parking lots, achieving a lasting result.
Is slag environmental friendly?
Slag cement is a recovered material from the iron production process and because of this, reduces the environmental impact of concrete mixtures. Additionally, slag cement is very effective in reducing permeability and increasing durability in concrete.
What is cement chemistry?
Cement is manufactured through a closely controlled chemical combination of calcium, silicon, aluminum, iron and other ingredients. These ingredients, when heated at high temperatures form a rock-like substance that is ground into the fine powder that we commonly think of as cement.
How is granulated blastfurnace slag produced at ecocem?
Ecocem GGBS is an industrial by product that is diverted from landfill and up-cycled into a commodity product. On exiting the iron processing system, molten blastfurnace slag is rapidly quenched with water to form Granulated Blastfurnace Slag (GBS). Ecocem GGBS is produced by drying and grinding the GBS at our milling plant in Dublin.
What is the raw material of ecocem cement?
ECOCEM’s raw material is a granulated slag obtained from blast-furnace slag that has been rapidly cooled in a “granulator”. Our product is part of Circular Economy. The granulated slag’s chemical composition is remarkably stable. Its stability, as well as its mineralogical composition are verified by an hourly analysis.
What’s the difference between GGBS and ecocem cement?
Ecocem GGBS is a high performance alternative to traditional cement that will increase the technical performance of your application, improve its appearance and minimize its environmental impact. GGBS is an acronym for Ground Granulated Blastfurnace Slag, a by-product from the manufacture of Iron.
How much money has ecocem materials limited raised?
Ecocem Materials Limited Raises €22.5m from Breakthrough Energy Ventures and Breakthrough Energy Ventures Europe general enquiry?