<abstract xmlns="http://www.w3.org/1999/xhtml"> The Algerian iron and steel complex of El Hadjar, near the city of Annaba, produces a granulated blast furnace slag (GBFS) mainly used by the local cement factories as an addition to clinker of up to 30 % as maximum content, for manufacturing a compound CEM II type cement (Algerian Standard).With the aim, on the one hand, of limiting the use of high clinker content in Algerian cement plants and replacing it with other constituents such as granulated blast furnace slag and, on the other hand, to use this slag as an addition to local concrete, we have attempted to characterize it according to its degree of reactivity.The use of chemical activity indexes and caustic soda tests lead to disappointing results that are contradicted by the results obtained on mortar within the scope of the standard determination of a hydraulic efficient index. The results obtained indicated that the classification of El Hadjer slag strongly depends on its degree of fineness; it also has weak short-term activity, denoting a slower kinetics of reaction compared to classical slag. These results permit us to recommend a minimal Blaine of 3500 cm2/g for this slag.A more intensive use of this slag in cement and concrete is undoubtedly possible, but this must be demonstrated by conducting tests on mortar and validating by a study on concrete.</abstract>

The Algerian iron and steel complex of El Hadjar, near the city of Annaba, produces a granulated blast furnace slag (GBFS) mainly used by the local cement factories as an addition to clinker of up to 30 % as maximum content, for manufacturing a compound CEM II type cement (Algerian Standard).With the aim, on the one hand, of limiting the use of high clinker content in Algerian cement plants and replacing it with other constituents such as granulated blast furnace slag and, on the other hand, to use this slag as an addition to local concrete, we have attempted to characterize it according to its degree of reactivity.The use of chemical activity indexes and caustic soda tests lead to disappointing results that are contradicted by the results obtained on mortar within the scope of the standard determination of a hydraulic efficient index. The results obtained indicated that the classification of El Hadjer slag strongly depends on its degree of fineness; it also has weak short-term activity, denoting a slower kinetics of reaction compared to classical slag. These results permit us to recommend a minimal Blaine of 3500 cm2/g for this slag.A more intensive use of this slag in cement and concrete is undoubtedly possible, but this must be demonstrated by conducting tests on mortar and validating by a study on concrete.

Reactivity of Granulated Blast Furnace Slag

Research field: Solid waste valorization in civil engineering materials, cement and concrete technology. Address: Department of Civil Engineering, Faculty of Technology, Annaba University, Annaba, 23000 Annaba

Research field: Solid waste valorization in civil engineering materials, concrete technology, steel fiber reinforced concrete and roller compacted concrete. Adress: Department of Civil Engineering, Faculty of Technology, M’sila University, M’sila , 28000 M’sila

Research field: Solid waste valorization in civil engineering materials, cement concrete technology, durability of cementious materials. Address: Department of civil Engineering, INSA of Toulouse, Laboratory of LMDC Toulouse

Slovak Journal of Civil Engineering

{"article-title":"Reactivity of Granulated Blast Furnace Slag"}

The Algerian iron and steel complex of El Hadjar, near the city of Annaba, produces a granulated blast furnace slag (GBFS) mainly used by the local cement...

Reactivity of Granulated Blast Furnace Slag

Published Online: Jul 30, 2013

Page range: 7 - 14

DOI: https://doi.org/10.2478/sjce-2013-0007

Keywords
Granulated slag, reactivity, activity indexes

This content is open access.

Reactivity of Granulated Blast Furnace Slag

Published Online: Jul 30, 2013

Page range: 7 - 14

DOI: https://doi.org/10.2478/sjce-2013-0007

KeywordsGranulated slag, reactivity, activity indexes

This content is open access.

Keywords
Granulated slag, reactivity, activity indexes