Effect of Fuller-fine sand on rheological, drying shrinkage, and microstructural properties of metakaolin-based geopolymer grouting materials

Xiang, Jichun; Liu, Leping; Cui, Xuemin; He, Yan; Zheng, Guangjian; Shi, Caijun

doi:10.1016/j.cemconcomp.2019.103381

Cited by 66 publications

(10 citation statements)

References 35 publications

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“…The increase in the fluidity at a relatively lower content of TS was likely due to the smaller specific surface area of TS than FA, which reduced the water demand of the mixture. In this case, the amount of free water and the thickness of water film on the particles increased, and thereby the fluidity of the mixture was improved (Xiang et al, 2019).…”

Section: Fluiditymentioning

confidence: 95%

Effect of Extracted Titanium Tailing Slag on the Properties of Alkali-Activated Fly Ash-Ground Blast Furnace Slag Binder

Wang

Yun

et al. 2022

Front. Mater.

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The extracted titanium tailings slag (TS) is a by-product of titanium extraction from the blast furnace slag. Its chemical composition is similar to that of ground granulated blast furnace slag (GGBS), but the relatively lower reactivity limited its utilization as a supplementary cementitious material. In this study, the reactivity of TS was improved by mechanical grinding, and the optimum property of finely ground TS was selected to replace fly ash (FA) in the alkali-activated FA-GGBS binder. The influence of TS content on the fluidity, setting time, and compressive strength of the ternary binder was investigated. X-Ray diffraction, Fourier-transform infrared spectroscopy, and scanning electron microscopy were used to analyze the effect of TS on the reaction process. Results showed that the optimum reactivity index of TS was 81.18% at 28 days when it was ground for 15 min in a ball mill. The highest compressive strength of the alkali-activated ternary binder was achieved when the replacement of FA by ground TS was 40%, and its 28-day compressive strength was 49.3 MPa, approximately 22% higher than the binder without TS. The addition of the TS would accelerate the reaction process of binder to form more products, including C-(A)-S-H and gismondine.

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Section: Fluiditymentioning

confidence: 95%

Effect of Extracted Titanium Tailing Slag on the Properties of Alkali-Activated Fly Ash-Ground Blast Furnace Slag Binder

Wang

Yun

et al. 2022

Front. Mater.

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“…vibration in close-loop system; detailed information can be found in [44,45]. The mechanical vibrational stress corresponds to the sample vibrational energy which is defined as σ υ = (1/2)ρA 2 (2πf) 2 , where ρ is the powder density, A is the vibration amplitude and f is the vibration frequency. The frequency and amplitude of vibration which has been used in this study is 60 Hz and 100 μm, respectively.…”

Section: Discovery Hr3-rheometermentioning

confidence: 99%

“…Powders are omnipresent in our daily life and they are extensively used in various industries such as pharmaceutical, cosmetics, chemical, food and construction. Despite numerous studies on powder rheology [1][2][3][4][5][6][7] their behavior is not fully understood, due to their complexity. In fact, the flow behavior of a powder depends on many factors including surface properties, size, shape of particles [8] and environmental conditions such as humidity [9].…”

Section: Introductionmentioning

confidence: 99%

Powder flow behavior governed by the surface properties of glass beads

et al. 2021

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Powder rheology and its sensitivity to surrounding environmental condition by controlling the surface properties of the particles is one of the major challenges of the powder industries. Indeed, handling large quantities needs powders with good flowability, adequate compressibility and few electrostatic charges. We have performed a chemical treatment in order to obtain hydrophobic glass beads and its bulk behavior has been compared with raw glass beads depending on the humidity. We characterized flow properties under different processing equipments. We observed that by performing hydrophobic surface treatment sensitivity of glass beads reduced to the humidity. Furthermore, the influence of the electrostatic charges was an undeniable factor in increasing the viscosity of hydrophobic glass beads and consequently lowering its flowability in front of raw glass beads; at low shear rate. At high shear rate, the powders presented similar behaviors.

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“…In literature there are numerous studies reporting the addition of: SiO 2 sand, even beach sand , to refine their rheological and mechanical resistance to compression combined with a decrease in drying shrinkage [ 11 , 12 ]; rice hush ash, bagasse ash , and other ashes from biomasses rich in silica to decrease curing time and increase mechanical properties [ 13 ]; alpha or gamma-alumina to increase the overall refractoriness of the binder [ 14 , 15 ]; a combination of Al 2 O 3 plus SiO 2 sources in form of simple oxide mixture to increase density and thermal resistance [ 16 ]; ultra-fine slag to increase in strength characteristics and improve durability [ 17 ]; waste glass from containers and WEEE (Waste Electrical and Electronic Equipment) recycling to decrease shrinkage upon drying and toughness [ 18 ]; and ceramic filler to improve dimensional stability and mechanical resistance after thermal exposure [ 19 ]. …”

Section: Introductionmentioning

confidence: 99%

Recycling of Waste Corundum Abrasive Powder in MK-Based Geopolymers

et al. 2022

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Recycling corundum abrasive powder in metakaolin-based geopolymer formulations is proposed to reduce the amount of waste to be treated or disposed of in landfills, allowing to decrease ecological damage as well as to reduce transport costs for removal. The addition of waste corundum, as an important source of Al2O3, has proved to increase the slightly ionic conductivity of the leachate solution obtained after immersion in water of samples at 28 d of curing at room temperature. With the same curing conditions, the geopolymerization process has not been disturbed as evidenced by the FT-IR peak shift and XRD patterns. It was recorded a decrease in resistance to compression of the consolidated geopolymers of about 5% with 10 wt% addition and of about 77% with the addition of 20 wt% of waste corundum. In any case, the waste abrasive powder does not release heavy metals when added to a geopolymeric formulation based on MK, NaOH, and Na-silicate, and does not show relevant antibacterial properties, indicating the formation of a stable and safe final product with a ceramic-like appearance.

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Effect of Fuller-fine sand on rheological, drying shrinkage, and microstructural properties of metakaolin-based geopolymer grouting materials

Cited by 66 publications

References 35 publications

Effect of Extracted Titanium Tailing Slag on the Properties of Alkali-Activated Fly Ash-Ground Blast Furnace Slag Binder

Effect of Extracted Titanium Tailing Slag on the Properties of Alkali-Activated Fly Ash-Ground Blast Furnace Slag Binder

Powder flow behavior governed by the surface properties of glass beads

Recycling of Waste Corundum Abrasive Powder in MK-Based Geopolymers

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