Introduction of the Ground Granulated Blast Furnace Slag Powder


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.The chemical composition of a slag varies considerably depending on the composition of the raw materials in the iron production process.

GGBS is used to make durable concrete structures in combination with ordinary Portland cement and/or other pozzolanic materials. GGBS has been widely used in many countries. It can used in below industries:

Making slag cement

When the specific surface area reaches 450 m2/kg~550 m2/kg and the activity index reaches 100% in 7days, it can be used in the production of 32.5~42.5 grade slag cement by using a small amount of clinker (about 25% clinker). It not only reduces the cost of cement production, but also saves a lot of energy and reduces environmental pollution. It has significant economic benefits and good social benefits.

As a concrete admixture, replacing cement

Since the 28-day activity index of the slag powder can be close to or greater than 100%, the slag powder can be used to make concrete in equal or excess amount. Slag powder can reduce the amount of cement used in concrete, reduce the cost of concrete production, save resources and reduce energy consumption. In addition, the slag powder can effectively enhance the strength of the concrete and be used for high-strength concrete.

Other applications

The slag powder is also used in pipe making plants as an underwater filling material. Incorporating 40% to 50% of composite slag powder into the cement pipe to replace the cement has the following advantages:the impermeability of the concrete pipe is significantly improved, and the concrete pipe mixed with the composite slag powder is used for several decades. The concrete strength is keep increasing, which not only ensures the quality of the concrete pipe in use, but also prolongs the life of the pipe.

Zenith LM series vertical roller mill is an ideal equipment to process the slag. It can dry the slag during the grinding. If you want to learn more information about our LM series vertical roller mill. Please contact with us freely.



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