Effect of CNT on Microstructure and Minearological Composition of Lightweight Concrete with Granulated Foam Glass

Vaganov, V. E.; Popov, Maxim V.; Korjakins, Aleksandrs; Šahmenko, Genādijs

doi:10.1016/j.proeng.2017.02.141

Cited by 32 publications

(27 citation statements)

References 10 publications

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“…To ensure energy-efficient construction, durable materials are required that combine high heat-shielding properties with structural stability. Numerous developments in recent years have been devoted to the development of porous concrete technology, which is represented by cellular concrete and lightweight concrete based on porous aggregates [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17]. Aerated concrete compares favorably with an extensive raw material base, a variety of products, and economical operation.…”

Section: Introductionmentioning

confidence: 99%

“…Development of efficient lightweight concrete technology depends on the quality of porous aggregates. Relevant is a research aimed at reducing density and increasing strength of aggregates, reducing energy intensity of production [1,7,[10][11][12][13][14][15][16][17][18][19]. Porous aggregates with a density of 300 -900 kg/m 3 for heatinsulating and structural concrete have been developed [6,8,9].…”

Section: Introductionmentioning

confidence: 99%

“…Porous aggregates with a density of 300 -900 kg/m 3 for heatinsulating and structural concrete have been developed [6,8,9]. To obtain aggregates, they recommend granular wastes of various industries [9][10][11][12][13][14][15][16][17][18][19][20], ashes from coal combustion [13,15,16], associated materials of extraction and processing of ores and fuels [10,14,[21][22][23]. The technology of granular foam glass is actively developing [17,18].…”

Section: Introductionmentioning

confidence: 99%

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Porous aggregate development for lightweight concrete

Miryuk

2020

E3S Web Conf.

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The article presents the results of studies of a porous aggregate and lightweight concrete obtained using liquid glass and man-made materials (glass cullet, magnetite ore dressing waste, substandard rocks). Feasibility of a multicomponent feed mixture for pyroplastic swelling of granules is substantiated. Optimization of raw mix composition provided the possibility of combining various formation mechanisms of porous granules. A set of technological solutions has been developed aimed at improving the conditions of molding and hardening of raw granules. A method for preparing a raw material mass is proposed that minimizes structural defects of porous granules. Possibility of capacity reaction of a raw mixture due to mechanical activation of solid components and introduction of sodium additives is proved. Technological conditions for low-temperature expansion of a multicomponent mixture and production of porous granules with a density of not more than 300 kg/m3 are determined. The formula of molding mixture for obtaining lightweight concrete using a porous aggregate is proposed. The use of liquid glass as a binder in a concrete mixture is preferred. The temperature of concrete hardening is recommended. The technology of porous concrete developed implements multifunctional properties of liquid glass, provides the use of technogenic materials, saving of energy resources.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Porous aggregate development for lightweight concrete

Miryuk

2020

E3S Web Conf.

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“…Furthermore, an increasing number of studies attempted to enhance the compressive and breaking strengths of ultra-light foamed concrete by introducing various fibers [3][4][5][6]. In recent years, researchers have proven that the introduction of carbon nanotubes (CNTs) effectively increases the compressive and breaking strengths of concrete/foamed concrete, and this effect is influenced by CNT dispersion [7][8][9][10]. Achieving a uniform distribution of CNTs in cement paste, which is key to enhancing the compressive and breaking strengths of foamed concrete, is complicated by their tendency to agglomerate [7].…”

Section: Introductionmentioning

confidence: 99%

Dispersion Performance of Carbon Nanotubes on Ultra-Light Foamed Concrete

Zhang

Liu

2018

Processes

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This study investigates the effect of carbon nanotube (CNT) dispersion on the mechanical properties and microstructures of ultra-light foamed concrete. A type of uniform and stable CNT dispersion solution is obtained by adding nano-Ce(SO4)2. Results show that CNT dispersion increases the compressive and breaking strengths of foamed concrete. CNTs play a nuclear role in the crystallization of C–S–H, and CNT dispersion effectively promotes the grain growth of C–S–H. The effect of CNT dispersion on the compressive and breaking strengths of foamed concrete is predicted through simulation.

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“…This type of material is attractive for its high mechanical strength, low thermal conductivity, non-combustion (A-grade flame-retardant material), high softening temperature, good thermal and chemical stability, good sound insulation effect, strong corrosion resistance and is insect-proof. Therefore, it is highly attractive to be used in thermal insulation materials, lightweight filling materials, sound-absorbing materials, and lightweight concrete aggregates in fields like construction, water conservancy and transportation [5,6,7,8,9,10,11,12,13].…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation of Thermal Conductivity of Foam Glass Based on the Steady-State Method

Qin

Tian

et al. 2018

Materials

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The effects of fly ash, sodium carbonate content, foaming temperature and foaming time on foam glass aperture sizes and their distribution were analyzed by the orthogonal experimental design. Results from the steady-state method showed a normal distribution of the number of apertures with change in average aperture, which ranges from 0.1 to 2.0 mm for more than 93% of apertures. For a given porosity, the thermal conductivity decreases with the increase of the aperture size. The apertures in the sample have obvious effects in blocking the heat flow transmission: heat flow is quickly diverted to both sides when encountered with the aperture. When the thickness of the sample is constant, the thermal resistance of the foam glass sample increases with increasing porosity, leading to better thermal insulation. Furthermore, our results suggest that the more evenly distributed and orderly arranged the apertures are in the foam glass material, the larger the thermal resistance of the material and hence, the better the thermal insulation.

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Effect of CNT on Microstructure and Minearological Composition of Lightweight Concrete with Granulated Foam Glass

Cited by 32 publications

References 10 publications

Porous aggregate development for lightweight concrete

Porous aggregate development for lightweight concrete

Dispersion Performance of Carbon Nanotubes on Ultra-Light Foamed Concrete

Numerical Simulation of Thermal Conductivity of Foam Glass Based on the Steady-State Method

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