Steel slag SS can be classified into basic oxygen furnace BOF electric arc furnace or ladle steel slag Their main difference lies in the energy source and the impurities at the end of the process [18 19] The well known Linz Donawitz Preparation and properties of carbonated steel slag used in cement cementitious materials
In recent years the research on the carbonation of steel slag has gained some achievements Huijgen et al [18] has found that when the steel slag powders were carbonated in suspension at CO 2 pressure of 19 bar and temperature of 100 °C for 30 min a mass of CO 2 which equals to 74 wt% of steel slag was fixed in the carbonation Moreover the
In recent years many researchers studied the secondary use of steel slag [7] The main components of steel slag include Fe x O Fe CaO SiO 2 MgO and MnO [8] According to the composition and structural properties of the slag the Fe containing resources in the slag can be recovered by magnetic separation and returned to the steelmaking process and the
The main cause of swelling of the slag was the presence of CaO which reacts with water Table 4 Mechanical properties of steel slag samples and natural aggregate after the maximum particle size
Steel slag is the main waste product in the steelmaking process Because of its chemical composition and technical properties it can be reused as raw material in steel plants and can serve as a substitute for aggregates in civil engineering Because of its porous structure and alkaline properties steel slag can be used for wastewater
Steel slag is a potential mineral admixture for concrete In this paper the influence of steel slag on the compressive strength drying shrinkage permeability to chloride and carbonation resistance of concrete was investigated under two different conditions constant W/B and constant 28 days compressive results show that under the condition of
Steel slag is a by product of the steel industry and usually contains a high amount of f CaO and f MgO which will result in serious soundness problems once used as a binding material and/or aggregates To relieve this negative effect carbonation treatment was believed to be one of the available and reliable methods By carbonation treatment of steel
Steel slag is the waste residue produced in the process of steelmaking It is a composite oxide solid solution formed by the addition of lime and fluorite the erosion of the furnace lining and the oxidization of silicon and other materials in the molten iron [1] [2] China is a major producer of steel slag and the annual output is approximately 15% 20% of the crude
Results indicated that nano CaCO 3 and amorphous SiO 2 gel were the main carbonation products of steel slag which constructed a porous microstructure Nonetheless the intrinsic influencing mechanism of carbonation treatment on the properties of steel slag SCMs has not been well understood Moreover it is of significance to further
In terms of the physical and chemical properties of steel slag experts believe that through the analysis of the vast majority of steel slag the main components can be identified as calcium magnesium silicon and iron oxides so the steel slag can be regarded as a CaO SiO 2 MgO FeO tetrameric system [8 9]
To solve the problem of difficult utilization of steel slag the liquid steel slag was modified and the air quenching granulation process was carried out to make steel slag into a value added end product air quenching granulated steel slag The granulated slag was tested to analyze the variation rule of slag properties under different modification conditions Based on
Steel slag a by product from the steel making process is a potential mineral admixture for cement or concrete production [] C 3 S C 2 S C 4 AF and C 2 F are common minerals in steel slag which endow steel slag with cementitious properties [2 3] The main hydration products of steel slag include C S H gel and Ca OH 2 which are very similar to
Steel slag particles were ground to fineness at 450 500 m 2 /kg Quartz powder which contains more than 98% SiO 2 and has a specific surface of 350 m 2 /kg was used Two autoclave samples were prepared One was pure EAF steel slag powder; the other was a mixture of steel slag and quartz in which the CaO/SiO 2 mole ratio was adjusted around
1 Introduction Steel slag SS is a kind of industrial solid waste in the steelmaking industry In 2002 about 50 million tons of SS are produced worldwide [1] but today nearly 110 million tons of SS is discharged every year in SS has a high value added
Steel slag is a solid byproduct of the steelmaking process widely generated in the metallurgical industry Due to its alkaline nature and excellent adhesive properties with asphalt it represents a potential road construction material with outstanding road performance making it well suited for utilization in highway construction This paper conducts a systematic
Steel slag is a solid byproduct of the steelmaking process widely generated in the metallurgical industry Due to its alkaline nature and excellent adhesive properties with asphalt it represents a potential road construction material with outstanding road performance making it well suited for utilization in highway construction This paper conducts a systematic
Blast furnace slag BFS and steel slag SS collectively called iron and steel slags are the main by products of steelmaking The economical and efficient use of iron and steel slags to reduce greenhouse gas GHG emissions is an urgent problem to be solved Different iron and steel slags have various properties and thus the CO 2
In terms of the physical and chemical properties of steel slag experts believe that through the analysis of the vast majority of steel slag the main components can be identified as calcium magnesium silicon and iron oxides so the steel slag can be regarded as a CaO SiO 2 MgO FeO tetrameric system [8 9]
The main reason for this is the low alkalinity of the system which does not promote the hydration of potentially water hardened solid wastes well Kong C and Li X 2024 Effect of carbide slag and steel slag as alkali activators on the key properties of carbide slag steel slag slag phosphogypsum composite cementitious materials Front
Steel slag SS is a by product generated during the steelmaking process [[1] [2] [3]] Statistics indicate that global production of SS amounts to approximately 200 million tons annually with over 100 million tons being generated in China [4] This huge amount of SS not only occupies a significant amount of the limited land but also brings substantial pollution risks to
To promote the resource utilization of steel slag and improve the production process of steel slag in steelmaking plants this research studied the characteristics of three different processed steel slags from four steelmaking plants The physical and mechanical characteristics and volume stability of steel slags were analyzed through density water
Steel slag SS is the main by product in the steel production process The main chemical components of SS are CaO SiO 2 Al 2 O 3 FeO and main mineral phases are dicalcium silicate C 2 S and tricalcium silicate C 3 S which are similar to cement [1] [2] [3] At present Chinese annual crude steel output can reach more than 1 billion tons
This paper aims to study the effects of gypsum type and dosage on the rheological and strength properties of steel slag cemented paste backfill SSB CPB using fluorogypsum FG phosphogypsum PG and desulfurization gypsum DG Experimental results indicate that the yield stress and the viscosity of fresh SSB CPB are the smallest when using
The main plants in steel slag production are İskenderun iron and steel plant with tons Osmaniye iron and steel plant with tons and Kocaeli iron and steel plant with tons The replacement ratios can reach up to 100% with sufficient mechanical properties Steel slag used as coarse aggregate in mixes was more