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)
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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2. Kopanica N.O., Sarkisov Y.S., Demyanenko O.V. Application of nanodispersed silica in the production of building mixtures. Vestnik TGASU. 2016. No. 5, pp. 140–150. (In Russian).
3. Khaloo Alireza, Mobini Mohammad Hossein, Hosseini Payam. Influence of different types of nano-SiO2 particles on properties of high-performance concrete. Construction and Building Materials. 2016. Vol. 113, pp. 188–201. https://doi.org/10.1016/j.conbuildmat.2016.03.041
4. Chithra S., Senthil Kumar S. R. R., Chinnaraju K. The effect of Colloidal Nano-silica on workability, mechanical and durability properties of High Performance Concrete with Copper slag as partial fine aggregate. Construction and Building Materials. 2016. Vol. 113, pp. 794–804. https://doi.org/10.1016/j.conbuildmat.2016.03.119
5. Haruehansapong Sattawat, Pulngern Tawich, Chucheepsakul Somchai. Effect of the particle size of nanosilica on the compressive strength and the optimum replacement content of cement mortar containing nano-SiO2. Construction and Building Materials. 2014. Vol. 50, pp. 471–477. https://doi.org/10.1016/j.conbuildmat.2013.10.002
6. Nili M., Ehsani A. Investigating the effect of the cement paste and transition zone on strength development of concrete containing nanosilica and silica fume // Materials and Design. 2015. Vol. 75, pp. 174–183. https://doi.org/10.1016/j.matdes.2015.03.024
7. Urhanova L.A., Lhasaranov S.A., Bardahanov S.P. Modified concrete with nano-disperse additives. Stroitel’nye Materialy [Construction Materials]. 2014. No. 8, pp. 52–55. (In Russian).
8. Kalashnikov V.I., Erofeev V.T., Moroz M.N., Troyanov I.Yu., Volodin V.M., Suzdal’tsev O.V. Nanohydrosilicate technologies in concrete production. Stroitel’nye Materialy [Construction Materials]. 2014. No. 5, pp. 88–91. (In Russian).
9. Potapov V.V., Grushevskaya E.N., Leonovich S.N. Modification of materials on the basis of cement with hydrothermal nano-silica. Stroitel’nye Materialy [Construction Materials]. 2017. No. 7, pp. 4–9. (In Russian).
10. Yankovich K., Stankovich S.J., Stoyanovich M., Bojovich D., Antich L. Effect of nanosilica and filler type on the properties of high-strength concrete. Cement i ego primenenie. 2017. No. 4, pp. 118–120. (In Russian).
11. Durgun Muhammed Yasin, Atahan Hakan Nuri. Rheological and fresh properties of reduced fine content self-compacting concretes produced with different particle sizes of nano SiO2 // Construction and Building Materials. 2017. Vol. 142, pp. 431–443. https://doi.org/10.1016/j.conbuildmat.2017.03.098
12. Kosmachev P.V., Demyanenko O.V. Vlasov V.A. Kopanica N.O. Skripnikova N.K. Composite materials on the basis of cement with nanodispersed silica. Vestnik TGASU. 2017. No. 4, pp. 139–146. (In Russian).
13. Tyukavkina V.V., Kasikov A.G., Gurevich B.I. Influence of the method of introducing mesoporous silica in cement mortar. Izvestiya Sankt-Peterburgskogo gosudarstvennogo tekhnologicheskogo instituta (tekhnicheskogo universiteta). 2017. No. 38 (64), pp. 60–63. (In Russian).
14. Tyukavkina V.V., Kasikov A.G., Gurevich B.I. Mayorova E.A. The preparation of amorphous silica from non-ferrous metallurgy slags and its use for magnesium astringents. Khimicheskaya tekhnologiya. 2014. No. 3, pp. 167–172. (In Russian).
15. Gorshkov V.S., Timashev V.V., Savelev V.G. Metody fiziko-khimicheskogo analiza vyazhushchikh veshchestv [Methods of physico-chemical analysis of binders]. Moscow: Vysshaya shkola. 1981. 335 p.
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: https://doi.org/10.31659/0585-430X-2018-765-11-31-35 (In Russian).