Complex Method of Stabilizing Slag Suspension

Самченко, Светлана; Kozlova, I. V.; Zemskova, Оlga; Zamelin, Dmitry; Pepelyaeva, Angelina

doi:10.1007/978-3-030-19868-8_80

Cited by 8 publications

(15 citation statements)

References 10 publications

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“…However, the use of slag cements in the construction industry is limited due to the slow set of strength in the initial periods of hardening. To solve this problem, we proposed to use slag in the form of a finely ground component in the composition of multicomponent cements [13][14][15]. An increase in the strength of cements with the addition of finely ground slag (FGS) in the initial periods of hardening by an average of 50% was observed, but the standard deviation of the strength characteristics was 6-7%, indicating uneven distribution of the slag component in the cement system.…”

Section: Introductionmentioning

confidence: 99%

“…To ensure uniform distribution of slag particles in the volume of the cement matrix, it is proposed to introduce FGS as a suspension into the cement instead of mixing water [16][17][18]. The papers [19][20][21][22][23][24][25] carried out studies on the establishment of aggregative and sedimentation stability of dispersions of various substances of the nanoscale series: carbon nanotubes, europium oxohydroxide hydrosol, γ-Al2O3 sol, etc. The results of the studies showed that the establishment of aggregative and sedimentation stability of dispersions and the use of methods of homogenization and stabilization contribute to the uniform distribution of particles in the volume of the cement matrix and the production of products with enhanced performance properties.…”

Section: Introductionmentioning

confidence: 99%

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Efficiency of stabilization of slag suspensions by polycarboxylate

et al. 2019

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The paper describes the method of stabilization of slag suspensions prepared on the basis of finely ground slag (FGS) with a predominant particle size of 1-7 μm, a plasticizer based on polycarboxylate (polycarboxylate). In suspension, FGS particles form two types of micelles with negative and positive surface charges. It has been established that stabilization with polycarboxylate, which is an anionic long-chain surfactant, affects slag particles with a positive surface charge. The formation of strong and elastic gel-like films on the surface of FGS leads to an increase in the structural and mechanical factor of aggregative stability of slag suspensions. Thus, the stabilization of slag particles by polycarboxylate is ensured by electrostatic, structural and mechanical factors of aggregative stability. It was established experimentally that the introduction of polycarboxylate into the aqueous dispersion medium increases the aggregative and sedimentation stability of slag suspensions. In the first period of particle sedimentation, on average, stability of slag suspensions is increased by 36 times, in the second period - 19 times, in the third period - 4 times. To ensure stability of slag suspensions, the protective number and the optimal concentration of the polycarboxylate are determined. The protective number of the suspension was 0,016 g/l; the optimal concentration of polycarboxylate - 4 g/l.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Efficiency of stabilization of slag suspensions by polycarboxylate

et al. 2019

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“…Scientists have conducted studies to develop ways to improve slag cements, cement and other binding compositions containing slag [4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22]. One of the ways to increase the activity of the slag is thermal activation, which consists in the combination of abrupt heating of the source material with a relatively short isothermal exposure resulting in rapid cooling of the slag [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

“…In works [7,11,17,[18][19][20][21][22][23][24], the positive effect of slag fineness on the properties of the studied cements was noted, which allows us to consider it as a reinforcing component of the cement matrix. In this regard, the goals and objectives of the study were formulated, which are: to obtain finely ground slag of different dispersity and to study its effect on the properties of Portland cement with mineral additives.…”

Section: Introductionmentioning

confidence: 99%

“…In this regard, the goals and objectives of the study were formulated, which are: to obtain finely ground slag of different dispersity and to study its effect on the properties of Portland cement with mineral additives. Studies of the effect of this slag on the properties of additive-free Portland cement and SPC were carried out earlier and are presented in [22][23][24].…”

Section: Introductionmentioning

confidence: 99%

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The use of finely ground slag in portland cement with mineral additives

et al. 2019

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The method of introducing of finely ground granulated blast furnace slag (GBFS) in the composition of the cement as a result of dry mixing of the material with the additive is considered. The aim of the research was to study the effect of the addition of finely ground slag on the construction, technical, physical, mechanical, and structural characteristics of cement with mineral additives. The setting time was studied, the normal density of the cement paste with the addition of finely ground slag was determined. The dependences of the strength and porosity of the cement stone on the time of hydration of samples are built. The strength of the cement was determined by the national standard GOST 30744-2001. The porosity of the cement stone was determined by saturating the samples with an inert liquid. It has been established that the introduction of 3–5% of slag 1 and 1–3% of slag 2 provides an increase in the strength of cement stone during the first days of hardening on average by 37–44%; at the grade age - by 26–30%, decrease in porosity — by 17–28%. It is shown that the introduction of finely ground slag additives compacts and strengthens the structure of the cement stone. It has been established that grinding GBFS to a size of 1 μm (slag 1) is impractical because the obtained research results are comparable with the results when slag 2 is introduced into the cement composition.

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Plasticizer for controlling single‐walled carbon nanotube fibers and zincophilic sites of microfiber supercapacitor

Kim

Jin

Lee

et al. 2022

Intl J of Energy Research

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In the past few decades, single-walled carbon nanotube (SWCNT) fibers have been considered for various applications, from aerospace to electronics including flexible devices. Here, we report an effective way of controlling the viscosity of the liquid crystal SWCNT phases for fiber spinning. By applying Tris(hydroxymethyl)aminomethane (THA)-functionalization to single-walled carbon nanotubes (SWCNT_CONH), we enhanced the free volume of individual SWCNTs, which synergistically affected the formation of nematic liquid crystal phases. As a result, we were able to precisely control the viscosity and phase transformation of the nematic liquid crystal phases for fiber spinning. The SWCNT fiber spun from those nematic phases with plasticizer (BP30CONH5; 30 mg/mL of SWCNT_BP with 5 wt% of SWCNT_CONH) exhibited noticeably higher mechanical properties (tensile strength, 1.44 GPa and tensile modulus, 169 GPa) with higher electrical conductivity (1899 S m 2 / kg). These fibers were also exceptionally flexible and showed endurable performance as wearable and flexible electronic electrode devices from welldistributed zincophilic sites (CONH). As an Zn-ion supercapacitor, the SWCNT fiber exhibited linear and volumetric capacitances of 14.33 mF cm À1 and 22.55 F cm À3 at 0.1 mA cm À1 with capacitance retention of 98% after over 30 000 bending tests.

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Complex Method of Stabilizing Slag Suspension

Cited by 8 publications

References 10 publications

Efficiency of stabilization of slag suspensions by polycarboxylate

Efficiency of stabilization of slag suspensions by polycarboxylate

The use of finely ground slag in portland cement with mineral additives

Plasticizer for controlling single‐walled carbon nanotube fibers and zincophilic sites of microfiber supercapacitor

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