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Blast Furnace Slag/ Ground Granulated Blast Furnace Slag

Granulated Blast Furnace Slag

Granulated Blast Furnace Slag is the residue of combustion in the furnace of the steel refining process or byproducts of the steel plant such as PT Krakatau Steel (Persero) Tbk. and its subsidiary PT Krakatau Posco.

GBFS forming elements are lime, silica and alumina has a chemical composition that does not differ from natural mineral materials include materials such as Portland Cement hydration. Often also used as a mixture of Portland Cement in the manufacture of concrete, mortar, grouts and others. A mixture of cement products is known as Blended Cement or Mix Cement.

Ground Granulated Blast Furnace Slag

GGBFS/GGBS Ground Granulated Blast Furnace Slag/Ground Granulated Blastfurnace Slag is a GBFS that has been finely ground which has a cementitious properties like cement that can serve as an adhesive aggregate. On a good fineness GGBFS/GGBS has the same adhesive strenght quality such as Portland Cement. GGBFS can therefore be substituted for Portland Cement in a wide range of equal mass replacement ratios. Various replacement levels for GGBFS from 10% to up to 70%.

Specifications and Analysis of Results of GBFS Physical Chemistry

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NoParameterOxideResult

Lh

(ppm)

Referen PTSI
1 Calium Oxide CaO 45,2% - (CaO+MgO+SiO2)>65%
2 Silicone Oxide SiO2 34,80% -
3 Alumunium Oxide Al2O3 14,79% -
4 Sulphur Oxide SO3 1,74% -
5 Ferri Oxide Fe2O3 1,34% -
6 Magnesium Oxide MgO 0,99% -
7 Titanium Oxide TiO2 0,55% -
8 Calium Oxide K2O 0,38% -
9 Mangan Oxide MnO 0,25% -
10 Natrium Oxide Na2O 0,22% -
11 Barium Oxide BaO 0,08% -  
12 Phospor Oxide P2O5 0,05% -  
13 Stronsium Oxide SrO 0,04% -  
14 Zirconium Oxide ZrO2 0,04% -  
15 Chromium Oxide Cr2O3 0,01% <250 (0.025%)  
16 Zinc Oxide ZnO 30ppm <500(0.050%)  
Physic testing
NO Parameter Result Unit - Referen PTSI
17 Work Index 21,68 kWh/ton -  
18 Weight Volume (fresh) 1,106 kg/litre - -
19 Weight Volume (powder) 0,963 kg/litre - -
20 Water level 4.0 %   <15%
21 BFS Fresh sifter analyze  (Mesh)        
  No. 16 (1180 μm) Passing: 80.43 %       >75%
  No. 30 (600 μm) Passing: 41.72 %        
  No. 50 (300 μm) Passing: 11.92%        

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Usage and Applications

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1. GBFS as an Aggregate

GBFS can be used like sand as a substitute aggregate for building materials. ASuch as a substitute material, GBFS has the advantage which can be seen in the following discussion.

2. GGBFS as a Cement Replacement

GGBFS/GGBS or Slag Cement Slag consists mainly of calcium, aluminium and silicate has a chemical composition similar to these respective natural mineral materials and to hydrated Portland Cement. It is often mixed with fresh Portland Cement powder in the manufacture of concrete, mortars, grouts etc. The mixed cementitious product is referred to as blended cement. Various mixture of GGBFS/GGBS on Portland Cement makes it possible to optimize the specific properties of concrete and mortar. GGBFS / GGBS displays cementitious qualities similar to those of Portland Cement. Therefore be substituted for Portland Cement in a wide range of equal mass replacement ratios. Various replacement levels for GGBFS from 10% to up to 70%. Typically 30-50% is used in most instances.


Advantages of Granulated Blast Furnace Slag/Ground Granulated Blast Furnace Slag