Strength optimization and key factors correlation of one-part fly ash/ladle furnace slag (FA/LFS) geopolymer using statistical approach

Yong-Jie, Hang; Cheng-Yong, Heah; Yun-Ming, Liew; Abdullah, Mohd Mustafa Al Bakri; Lee, Yeng Seng; Ern-Hun, Kong; Shee-Ween, Ong; Wan-En, Ooi; Hui-Teng, Ng; Yong-Sing, Ng

doi:10.1016/j.jobe.2022.105480

Cited by 10 publications

(6 citation statements)

References 59 publications

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“…This displacement toward low wave numbers is used by several authors as an indication of the formation of an alkali-activated network-attributed to the sodium aluminosilicate gel formed. [44][45][46][47][48] As previously observed, this shift was due to the yield of alkali-activated network when more Al 3+ ions were included into the SiO 4 tetrahedral framework. 46,49 When both IOT and MK were activated together, an equal displacement toward wavenumbers 1000 cm −1 was observed.…”

Section: Structural Characterizationsupporting

confidence: 71%

“…[44][45][46][47][48] As previously observed, this shift was due to the yield of alkali-activated network when more Al 3+ ions were included into the SiO 4 tetrahedral framework. 46,49 When both IOT and MK were activated together, an equal displacement toward wavenumbers 1000 cm −1 was observed. These equal absorption bands recorded on BIOT and BIOT+MK 30 specimens suggest no sensible differences in the alkali-activated network.…”

Section: Structural Characterizationsupporting

confidence: 71%

“…It is noticed that the band appearing at 1083 cm −1 for IOT shifted to 1000 cm −1 , after alkali‐activation. This displacement toward low wave numbers is used by several authors as an indication of the formation of an alkali‐activated network—attributed to the sodium aluminosilicate gel formed 44‐48 . As previously observed, this shift was due to the yield of alkali‐activated network when more Al 3+ ions were included into the SiO 4 tetrahedral framework 46,49 .…”

Section: Resultssupporting

confidence: 54%

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Synthesis and properties of alkali‐activated iron ore tailings blended with metakaolin

Silva

Barbosa

Ferreira

et al. 2023

Int J Applied Ceramic Tech

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In this study, synthesis, microstructural characteristics, mechanical properties, and environmental compatibility of alkali‐activated binders derived from iron ore tailings (IOT)—with partial replacement with metakaolin (MK)—were investigated. The binders were produced with a NaOH solution, IOT, and MK. A thermal cure at 100°C was used and the MK was applied as a partial replacement of IOT in three proportions (10, 20, and 30 wt%). The IOT‐based specimens presented an average of 98.0 and 18.0 MPa at 7 days age of curing for compressive and flexural strength, respectively. The mechanical properties of the alkali‐activated binders with MK decreased as the substitution ratio increased. By the microstructural analysis, it was found a zeolite‐type phase in alkali‐activated IOT, while in the binders blended with MK, three new mineral phases were identified. Furthermore, Fourier transform infrared, quantitative X‐ray diffraction, and environmental analysis suggest that the Fe species present in IOT acted in the alkali‐activation reaction.

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Section: Structural Characterizationsupporting

confidence: 71%

Section: Structural Characterizationsupporting

confidence: 71%

Section: Resultssupporting

confidence: 54%

See 1 more Smart Citation

Synthesis and properties of alkali‐activated iron ore tailings blended with metakaolin

Silva

Barbosa

Ferreira

et al. 2023

Int J Applied Ceramic Tech

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“…The use of LF slag alone [60], activated LF slag, and the inclusion of additives like fly ash [129][130][131][132][133][134][135][136][137][138][139][140], fibers [141][142][143], and metakaolin [59,144] has been studied for forming geopolymers. The most critical factor in developing geopolymers is the hydration of binders, cement, slag, or fly ash to activate calcium aluminum silicate minerals using an alkali activator.…”

Section: Lf Slag-based Geopolymersmentioning

confidence: 99%

“…Yong et al [136] studied the cause-and-effect relationship between mixing ratio and optimal properties using a statistical approach in fly ash/LF slag-based geopolymer. The optimum ratios found by the team using a statistical method were 0.25, 5.0, and 0.20 for water-to-binder, sodium metasilicate-to- sodium hydroxide, and alkali activator-to-aluminosilicate sources, respectively.…”

Section: Lf Slag-based Geopolymersmentioning

confidence: 99%

Ladle Furnace Slag: Synthesis, Properties, and Applications

Jacob

2023

ChemBioEng Reviews

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Ladle slag is a byproduct formed during the ladle refining stage of steel making. It is a dusty material that has been considered industrial waste. Technical advancements towards a sustainable industry led to the development of different applications for ladle slag. Depending on the processing methods during the steel slag production and the weathering of the slag post‐production, the elemental composition of the steel slag largely varies. Owing to this, its characteristics cannot be generalized and specific applications depending on the sources are developed. It is generally used in construction materials, soil rejuvenation, and CO2 capture. This paper reviews the production process, the mineralogical and morphological properties, stabilization techniques, and the applications of ladle furnace (LF) slag. One of the prime focuses of waste remediation and sustainable industry is to find meaningful ways to turn waste into products. In this respect, a comprehensive review of the properties of LF slag and its current application will help provide a framework for the development of future sustainability goals. With increased slag usage, the ladle refining process of steelmaking can be turned into a more carbon‐neutral process.

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Development and characterization of waterproofing flexible mortar incorporating partially cured geopolymers synthesized from fly ash and blast furnace slag

Ipekci Terzioglu,

Cinar Sahin

2024

Structural Concrete

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Geopolymers offer a green alternative to cement for use in construction chemicals. This study aimed to synthesize partially cured geopolymeric structures for use in waterproofing mortars, targeting applications such as water tanks, pools, and areas exposed to seawater and rain, where preventing crack formation and water leakage is crucial. The quantity of ordinary Portland cement (OPC) in a two‐component waterproofing flexible mortar was reduced by incorporating geopolymer cured in open air under ambient conditions. Based on characterization tests, three geopolymers were selected for inclusion in the mortar formula. Fresh mortar pre‐tests and performance tests on cured mortar were conducted. The results indicated that the mortar formula containing geopolymer at 75 wt.% of OPC, with a solid/liquid weight ratio of 1.5 and a blast furnace slag/fly ash weight ratio of 75:25, where the blast furnace slag had a more amorphous structure, exhibited optimal characteristics in crack bridging, bond strength, capillary water absorption, and waterproofing capacity. This study demonstrates the effectiveness of geopolymers in reducing OPC consumption and enhancing their user‐friendliness in waterproofing mortar applications. It offers practical insights into optimizing geopolymer formulations for superior performance and environmental benefits.

show abstract

Strength optimization and key factors correlation of one-part fly ash/ladle furnace slag (FA/LFS) geopolymer using statistical approach

Cited by 10 publications

References 59 publications

Synthesis and properties of alkali‐activated iron ore tailings blended with metakaolin

Synthesis and properties of alkali‐activated iron ore tailings blended with metakaolin

Ladle Furnace Slag: Synthesis, Properties, and Applications

Development and characterization of waterproofing flexible mortar incorporating partially cured geopolymers synthesized from fly ash and blast furnace slag

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