Mechanical properties and setting time of ferrochrome slag based geopolymer paste and mortar

Karakoç, Mehmet Burhan; Türkmen, İbrahim; Maraş, Müslüm Murat; Demirboğa, Ramazan; Toprak, Mehmet Uğur

doi:10.1016/j.conbuildmat.2014.09.021

Cited by 141 publications

(52 citation statements)

References 37 publications

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“…Mechanical properties and setting time of ferrochrome slag based geopolymer paste and mortar was investigated. It was stated that it is possible to activate and to ferrochrome slag produce geopolymer cement using a proportioned mixture of sodium hydroxide and sodium silicate as an alkali-activator [14].…”

Section: Introductionmentioning

confidence: 99%

Sulfate resistance of ferrochrome slag based geopolymer concrete

Karakoç

Türkmen

Maraş

et al. 2016

Ceramics International

Self Cite

105

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Section: Introductionmentioning

confidence: 99%

Sulfate resistance of ferrochrome slag based geopolymer concrete

Karakoç

Türkmen

Maraş

et al. 2016

Ceramics International

Self Cite

105

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“…The alkaline activation of slag has been extensively studied . However, current research gives a better idea of the behavior of the two different binders‐based geopolymer concretes in the chemical solutions.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of sulfate and salt resistance of ferrochrome slag and blast furnace slag‐based geopolymer concretes

Özcan

Karakoç

2019

Structural Concrete

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In this study, mechanical, visual, and microstructure changes of geopolymer concrete exposed to sulfate and salt effects were investigated. Elazı g ferrochrome slag (EFS) and blast furnace slag (BFS)-based geopolymer concretes which completed curing time were immersed in 5% sodium sulfate (Na 2 SO 4 ), magnesium sulfate (MgSO 4 ), sodium chloride (NaCl), and magnesium chloride (MgCl 2 ) solutions for 12 weeks. The compressive strength values, ultrasonic pulse velocities, visual inspections, weight, and length changes of the samples were determined in this investigation. In addition, scanning electron microscopy was performed for the microstructure analysis of the samples removed from the solutions. Sulfate solutions had a more negative effect on the samples than salt solutions. As the EFS ratio in the mixture increases, the loss rate in the strength of the samples exposed to sulfate and salt solutions decreased. While samples exposed to sodium chloride, sodium sulfate, and magnesium sulfate solutions occurred weight gain, samples exposed to magnesium chloride occurred weight loss. The samples in salt solutions shrank, while the samples in sulfate solutions expanded. No deterioration occurred on the surfaces of the samples exposed to the solutions for 12 weeks. K E Y W O R D S blast furnace slag, chemical resistance, ferrochrome slag, geopolymer concrete, salt effect, sulfate effect

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“…It was formed during production of a geopolymer gel which filled and was deposited in pore spaces between the particles to form a denser microstructure and improve the overall physico-mechanical properties. Furthermore, the interaction between the produced geopolymer gel and the unreacted residues from raw material had a significant influence on the microstructure and on the overall development of compressive strength [15]. As a result, this geopolymer specimen had the highest recorded value of compressive strength (28.5 MPa) after 28 days of curing time and showed a highly compacted microstructure in comparison…”

Section: Starting Materials Characterizationmentioning

confidence: 98%

“…On the other hand, different ratios of sodium silicate to sodium hydroxide mainly affect the pH conditions of the prepared alkaline solution and thus could have some effects on the properties of the resulting geopolymer product. In addition, it is well-known that variation of the silica modulus Ms = SiO 2 /Na 2 O molar ratio significantly modifies the degree of polymerization of the dissolved species in a silicate solution, which plays a significant part in determining the structure and properties of geopolymers [15].…”

Section: Introductionmentioning

confidence: 99%

Alkali Activation of Waste Clay Bricks: Influence of The Silica Modulus, SiO2/Na2O, H2O/Na2O Molar Ratio, and Liquid/Solid Ratio

Gado¹,

Hebda

Łach

et al. 2020

Materials

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This study was conducted to investigate the influence of various reaction conditions, namely the silica modulus SiO2/Na2O, H2O/Na2O molar ratio, and liquid/solid ratio on the geopolymerization reaction of the waste fired clay bricks (Grog). The starting raw material and the generated geopolymer specimens produced by different geopolymerization reaction conditions have been characterized using different techniques: X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), scanning electron microscope (SEM) and thermal analysis. Furthermore, physico–mechanical characterization has been carried out through the determination of bulk density, porosity, water absorption, and compressive strength for each sample at interval curing times of up to 28 days. The results indicated that the geopolymerization system of the waste fired clay bricks is influenced by the investigated reaction conditions at room temperature. The compressive strength of the geopolymer sample produced at optimum conditions increased significantly by up to 37.5 MPa, in comparison with 4.5 MPa for other conditions. Finally, an optimum recommendation and useful conclusions concerning the recycling and utilization of this waste material through the geopolymerization process are made for compatibility with construction applications.

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Mechanical properties and setting time of ferrochrome slag based geopolymer paste and mortar

Cited by 141 publications

References 37 publications

Sulfate resistance of ferrochrome slag based geopolymer concrete

Sulfate resistance of ferrochrome slag based geopolymer concrete

Evaluation of sulfate and salt resistance of ferrochrome slag and blast furnace slag‐based geopolymer concretes

Alkali Activation of Waste Clay Bricks: Influence of The Silica Modulus, SiO2/Na2O, H2O/Na2O Molar Ratio, and Liquid/Solid Ratio

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