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Structure Formation of Cement Stone Modified with Additive of Nano-Disperse Silicon Dioxide

Number of journal: №11-2018

Tyukavkina V.V.
Kasikov A.G.
Gurevich B.I.

УДК: 666.9.015.42

AbstractAbout AuthorsReferences
The influence of nano-disperse silica powders on hydration processes and phase composition of Portland cement stone hardening products was studied. With the help of XRD and DTA it is revealed that the introduction of nano-SiO2 into the cement composition has an accelerating effect on the hydration of calcium silicates, the formation of calcium hydrosilicates and helps to reduce the content of portlandite. The structure of fine concrete modified with nano-disperse silicon dioxide is mainly represented by low-basic calcium hydrosilicates and is characterized by the presence of plate and needle-shaped crystals in micro-pores. The use of nano-disperse silica-containing powders obtained from slag makes it possible to obtain high-strength fast-hardening compositions. As a result of the conducted studies it is revealed that nano-disperse silica, which is a product of processing of copper-nickel slag, helps to accelerate the hydration of calcium silicates, the formation of low-basic calcium hydrosilicates and reduce the content of portlandite. The presence of a nano-disperse silica-containing additive in the cement composition provides the formation of a denser microstructure of cement stone, while improving the strength characteristics of the modified cement concrete.
V.V. TYUKAVKINA, Candidate of Sciences (Engineering) (This email address is being protected from spambots. You need JavaScript enabled to view it.)
A.G. KASIKOV, Candidate of Sciences (Chemistry) (This email address is being protected from spambots. You need JavaScript enabled to view it.)
B.I. GUREVICH, Candidate of Sciences (Engineering)

Tananaev Institute of Chemistry and Technology of the Federal Research Centre «Kola Science Centre of the Russian Academy of Sciences» (26a, «Academic Town», Apatity, 184209, Murmansk region, Russian Federation)

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For citation: Tyukavkina V.V., Kasikov A.G., Gurevich B.I. Structure formation of cement stone modified with additive of nano-disperse silicon dioxide. Stroitel’nye Materialy [Construction Materials]. 2018. No. 11, pp. 31–35. DOI: (In Russian).

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