MPA - essential materials, sustainable solutions
Quarry Products
 
  Slag  
 

Granulated blast furnace slag (GBS)

What is GBS?

Granulated Blast furnace slag (GBS) is a light coloured 0/4mm glassy sand produced by the rapid quenching of molten blast furnace slag using large volumes of water.

Production and Processing

GBS or Granulate as it is sometimes known is produced by rapidly cooling molten Blast furnace slag with water as the slag is tapped from the furnace. Large volumes of water are required (10 parts water to 1 part slag are optimum) sprayed at the molten slag and the resulting product is then pumped to and dewatered within the granulation plant which as well as processing the granulated slag also recovers the water for cooling to then be reused. 

Having a relatively high moisture content the material is allowed to drain by stockpiling. This process must be carefully managed in order to maximise its hydraulic properties.   

Granulate

 












Typical Grading

Size (mm)

% Passing

2mm

95%

1mm

60%

0.5mm

20%

0.125mm

1%

Typical Chemical Properties

Substance

% Value

CaO

38

MgO

9

SiO2

34

Al2O3

14

S

1.1

MnO

0.3

TiO2

0.8

Typical Physical Properties

Property

Value

Relative Density

2.95

Mohs hardness

8

Applications

  • Cement replacement as GGBS*
  • Glass making
  • Sand replacement
  • Hydraulic bound mixtures

*The main application for GBS is as a cement replacement and this is covered in more detail on the GGBS page here.

For more information contact Martin Bridges

Please note this website is maintained to provide information and guidance on UK issues, products and applications of those products.

 
 

For more information on aggregates, please contact (info@mineralproducts.org) or phone us on 020 7963 8000

Quarry Picture
You are in: Products - Slag - Granulated blast furnace slag
Slag
Air-cooled blast furnace slag
Ground granulated blast furnace slag
Air-cooled basic oxygen steel slag
EAF carbon steel slag
Air-cooled high alloy EAF and stainless steel slag
Aggregates
 
Print PagePrintable page
   
Top of page I Disclaimer I Sitemap I Valid HTML 4.01 and CSS
Search