FEHS – BUILDING MATERIALS INSTITUTE | INSTITUTE OF NON-METALLIC MATERIALS

The thermal history of granulated blast furnace slag and its impact on reactivity

Many approaches have been developed to evaluate the reactivity of GBS in cementitious systems based on glass content, chemical composition, fineness, etc. However, a general method could not be found. The basic idea of a research project was to use already established analytical techniques. With Differential Scanning Calorimetry and viscosity measurement, in combination with classical cement-based tests, a correlation between the thermal history of GBS and its reactivity in a blastfurnace cement could be demonstrated for the first time.

About 400 million t of blast furnace slag are produced annualy world-wide, together with about 1247 million t of hot metal (2018). About 300 million t are quenched forming the glassy granulated blast furnace slag (GBS). For more than 130 years the GBS has been used as a clinker substitute in cement and concrete due its latent hydraulic property. Many approaches were developed in order to evaluate GBS reactivity in cementitious systems based on glass content, chemical composition, fineness, etc. However, a general method could not be found. Only a rough differentiation might be possible....

Related articles:

KR102004462 (B1)

Method for manufacturing cement substitute product using melting ferronickel slag

(22) 29.05.2018 (43) 26.07.2019 (57) The present invention relates to a method for producing a cement substitute using ferronickel slag, an input step of introducing ferronickel slag, a cooling step...

more
Issue 2013-03

Influence of the granulation conditions and ­performance potential of granulated blastfurnace slag – Part 2: Chemistry and physical properties

3.2 Physical properties and reactivity It is theoretically possible that changed grain morphology could be associated with a changed glass structure, and therefore also with changed reactivity of the...

more
Issue 2013-01

Influence of the granulation conditions and performance potential of granulated blast-furnace slag – Part 1: Granulation conditions

1 Introduction As a rule the liquid blastfurnace slag, which is usually at temperatures of 1440–1540?°C, is cooled rapidly in a steel works by quenching with a large excess of water (about 10:1)....

more
Issue 2017-7-8 WO2017085565 (A2)

Portland cement free activation of ground granulated blast furnace slag

(22) 16.11.2016 (43) 26.05.2017 (57) A Portland cement-free cementitious binder composition, said composition comprising: ground granulated blast furnace slag and/or pulverized fly ash; an alkali...

more
Issue 2017-6 GEBR. PFEIFFER SE

Gebr. Pfeiffer receives follow-up order from Sagar Cement

Sagar Cement Limited, based in ­Hyderabad, India, has entrusted Gebr. Pfeiffer SE with another order for a mill for grinding granulated blast-furnace slag and granulated blast-furnace slag cements. A...

more