Hierarchically Organized Structures of Hardened Composition in Metal and Cement System

Sarkisov, Yurii; Afanasiev, D. A.; Klopotov, A. A.; Abzaev, Yurii; Klopotov, Vladimir D.

doi:10.4028/www.scientific.net/amr.1013.36

Cited by 1 publication

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“…Studies [1][2][3][4][5][6][7][8][9][10][11][12] discuss the issues of synthesis of nanomodifiers on matrix components of composites (cement, sand, gypsum, zeolite, etc.) and consider the characteristics and growth stages of particles and new phases of the nanoscale range.…”

Section: Introductionmentioning

confidence: 99%

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Study of the carbon nanomaterials synthesis on the cement binder

Tolchkov

Aljaboobi

2022

JAMT

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The authors have developed a technology for creating a nanomodified binder for construction purposes, in which a uniform distribution of carbon nanomaterials is achieved by controlled synthesis of nanomaterials in the structure of the binder. The synthesis of carbon nanomaterials (CNM) was carried out by chemical vapour deposition of hydrocarbons on metal oxide catalysts. Cement CEM I 42.5H (M500 D0) and metal-oxide catalyst Ni-MgO (92.5 %-7.5 %, obtained by thermal method) were used as a raw material. The optimum catalyst/cement ratio of 0.2 was found to yield the specified CNM quality. If the catalyst/binder ratio is increased (without changing the other parameters), the specific yield value of the nanomodifier decreases, which can be explained by "poisoning" of the catalyst and, consequently, the formation of unstructured carbon. The nanomodifier was investigated by scanning electron microscopy, Raman spectroscopy and thermal gravimetry. Using Raman spectroscopy, the shape and position of the characteristic G and D bands showed that a material containing multi-walled carbon nanotubes (MWCNTs) was synthesized on the cement binder matrix. According to thermal gravimetry data, the obtained nanomodifier is resistant to thermal decomposition up to 500 °С. Experimental studies of the influence of the obtained additive on the characteristics of the construction composite were carried out on samples of fine-grained concrete. It is established that compressive strength for nanomodified samples increases by 18-20 %.

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Section: Introductionmentioning

confidence: 99%

“…In [2], features of nanocarbon synthesis from naturally occurring materials (peat of Sogra deposit) were analysed. The reaction was carried out by thermal treatment at temperature 505-520 °C (from 40 min to 2 h) with limited oxygen access.…”

Section: Introductionmentioning

confidence: 99%

Study of the carbon nanomaterials synthesis on the cement binder

Tolchkov

Aljaboobi

2022

JAMT

View full text Add to dashboard Cite

show abstract

Hierarchically Organized Structures of Hardened Composition in Metal and Cement System

Cited by 1 publication

References 4 publications

Study of the carbon nanomaterials synthesis on the cement binder

Study of the carbon nanomaterials synthesis on the cement binder

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