Alkali Activation of Ladle Slag from Steel-Making Process

Adesanya, Elijah; Ohenoja, Katja; Kinnunen, Päivö; Illikainen, Mirja

doi:10.1007/s40831-016-0089-x

Cited by 47 publications

(30 citation statements)

References 44 publications

(53 reference statements)

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“…According to the optimization studied in Ref. [7], Na 2 SiO 3 and KOH were mixed with a weight ratio of 0.67 and 0.03, respectively, to LS. Moreover, in order to gain a 30-min initial working time, borax (11648, Riedel-de Haen) was ground by Retsch RS200 for 30 s and then used as a retarder in mortar; the borax content was calculated based on the percentage of geopolymer solid (see the details in Ref.…”

Section: Alkali-activated Ladle Slagmentioning

confidence: 99%

“…The prismatic shape of the specimen was scaled as in Ref. [7] to total length of 80 mm, width 20 mm, and height 20 mm. The supports span was 40 mm.…”

Section: Bendingmentioning

confidence: 99%

“…The LS is barely adopted in alkali-activated materials (AAM) due to the content of free CaO which causes expansion and eventually cracks in hardening mortars. Consequently, only few investigations in literature are dealing with LS used as a precursor for AAM [7][8][9].…”

Section: Introductionmentioning

confidence: 99%

“…Recently, Adesanya et al [7] developed a promising alkali-activated ladle slag (AALS) mortar by optimizing the silica and alkali contents of the material and achieved 65 MPa at 28-day compressive strength. Like other AAM mortars, this matrix exhibits brittle behavior, but has a good compressive strength.…”

Section: Introductionmentioning

confidence: 99%

“…The AALS matrix, optimized in previous study [7], was reinforced with polypropylene (PP) fibers. Usually hydrophobic fibers give weak bond with cementitious matrix [33].…”

Section: Introductionmentioning

confidence: 99%

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High performance cementitious composite from alkali-activated ladle slag reinforced with polypropylene fibers

Nguyen

Carvelli

Adesanya

et al. 2018

Cement and Concrete Composites

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A B S T R A C TAlkali-activated ladle slag (AALS) is a promising cementitious material with environmental benefits. However, the brittleness of material has been limiting the use in construction. Therefore, in this experimental investigation, different polypropylene (PP) fibers were employed as a short randomly reinforcement in cementitious matrix in order to improve mechanical performance of the AALS composites.The study reveals that the AALS composite could gain very high ductility with an appropriate fibrous reinforcement. Fracture energy and fracture toughness of PP fiber reinforced AALS mortars increased by approximately 150 and 7.6 times, respectively, compared to the unreinforced material. Additionally, the flexural strength of the composite increased by roughly 300%. Pseudo strain hardening (PSH) behavior was observed along with multiple cracks under uniaxial tensile test. Scanning electron microscope (SEM) images confirmed the local fiber bridging effect, which resulted in the high mechanical performance of the PP-reinforced AALS.

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Section: Alkali-activated Ladle Slagmentioning

confidence: 99%

“…The prismatic shape of the specimen was scaled as in Ref. [7] to total length of 80 mm, width 20 mm, and height 20 mm. The supports span was 40 mm.…”

Section: Bendingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…The AALS matrix, optimized in previous study [7], was reinforced with polypropylene (PP) fibers. Usually hydrophobic fibers give weak bond with cementitious matrix [33].…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

High performance cementitious composite from alkali-activated ladle slag reinforced with polypropylene fibers

Nguyen

Carvelli

Adesanya

et al. 2018

Cement and Concrete Composites

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Alkali-Activated Materials for Sewers

Grengg

Gluth

Mittermayr

2023

Engineering Materials

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Possible Recycling of End-of-Life Dolomite Refractories by the Production of Geopolymer-Based Composites: Experimental Investigation

Furlani

Rondinella

Aneggi

et al. 2021

J. Sustain. Metall.

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Production and characterization of geopolymers prepared by mixing metakaolin, end-of-life dolomite refractories, sodium silicate solution, and sodium hydroxide solution have been performed. The as-received refractory was crumbled in order to obtain products having, respectively, 250 μm, 1 mm, and 2.5 mm maximum particles size. Each batch of powder was added in different proportions to a blank geopolymeric matrix. It has been observed that the addition of waste refractory reduces workability of the reference refractory-free slurry. After hardening, only the set of samples prepared with powders with maximum size of 250 μm maintain integrity while the others resulted affected by the presence of fractures caused by volumetric instabilities; samples with composition R100 showed the highest compressive strength, whereas higher refractory addition lowers strength. Specific surface area appears independent by materials composition; conversely pore volume slightly increases with the addition of dolomite refractory powder. During the thermodilatometric tests all compositions display a shrinkage of about 0.1% between 170 and 400 °C; however, sintering starts at higher temperature (above 600 °C) and samples melt in the range between 650 and 750 °C as a function of their composition, thus showing that the resulting materials loose refractoriness with respect to both the reference geopolymer and the dolomite refractory. Graphical Abstract

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Alkali Activation of Ladle Slag from Steel-Making Process

Cited by 47 publications

References 44 publications

High performance cementitious composite from alkali-activated ladle slag reinforced with polypropylene fibers

High performance cementitious composite from alkali-activated ladle slag reinforced with polypropylene fibers

Alkali-Activated Materials for Sewers

Possible Recycling of End-of-Life Dolomite Refractories by the Production of Geopolymer-Based Composites: Experimental Investigation

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