REPAIR MORTARS OBTAINED BY PLASMA MODIFICATION AND VORTEX ACTIVATION

Valentin Ushkov, Ruslan Ibragimov, Oleg Figovsky, Svetlana Samchenko

Abstract


Introduction. The service life of reinforced-concrete structures can be increased with the use of effective repair compositions obtained by activating the original components. Purpose of the study: We aimed to develop effective repair compounds obtained by activating the original components. Methods: To process the original components, low-temperature non-equilibrium plasma (LTNP) and electromagnetic activation in a vortex layer device were used. In the course of the study, we used polypropylene, steel, glass, and basalt fiber and fiber made of structured ferromagnetic microwire. Electron microscopy and X-ray diffraction analysis were applied. Results: It was established that the combined use of the above methods for the modification of raw components makes it possible to improve the strength of these materials by more than 50%, which is due to the characteristics of structure formation in the developed compositions. For instance, LTNP increases the amount of portlandite and reduces the main phases of cement stone — C3S and β-C2S, and vortex activation contributes to an increase in the total number of crystalline phases. Quartz powder particles processed in an electromagnetic mill are characterized by layered structure, high surface roughness, large developed cracking, as well as inclusions as a result of impact action. All that improves the physical and mechanical properties of the resulting repair compositions by an average of 20%. Repair compositions additionally treated with plasma modification feature new hydrated formations on quartz grains.


Keywords


activation, fiber, plasma, vortex layer.

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References


Abbas, I. S., Abed, M. H., and Canakci, H. (2023). Development and characterization of eco- and user-friendly grout production via mechanochemical activation of slag/rice husk ash geopolymer. Journal of Building Engineering, Vol. 63, Part A, 105336. DOI: 10.1016/j.jobe.2022.105336.

Bruyako, M. G., Kravtsova, D. V. Yurchenko, V. V., Solov’ev, V. G., and Ushkov, V. A. (2014). Effect of raw materials processing with low temperature non-equilibrium plasma on properties of building mortars. Stroitel’nye Materialy (Construction Materials), No. 12, pp. 68–71.

Chun, B., Oh, T., Jang, Y. S., Lee, S. K., Lee, J.-H., and Yoo, D.-Y. (2022). Strengthening effect of concrete beams using ultra-rapid-hardening fiber-reinforced mortar under flexure. Construction and Building Materials, Vol. 352, 129064. DOI: 10.1016/j.conbuildmat.2022.129064.

Fediuk, R. (2016). High-strength fibrous concrete of Russian Far East natural materials. IOP Conference Series: Materials Science and Engineering, Vol. 116, 012020. DOI: 10.1088/1757-899X/116/1/012020.

Fediuk, R., Pak, A., and Kuzmin, D. (2017). Fine-grained concrete of composite binder. IOP Conference Series: Materials Science and Engineering, Vol. 262, 012025. DOI: 10.1088/1757-899X/262/1/012025.

Fedosov, S. V., Akulova, M. B., and Slizneva, T. E. (2017). Research of regularity of a structure formation in the cement stone mixed by the mechanoactivated water with the polyvinyl acetate admixture. Academia. Architecture and Construction, No. 2, pp. 117–122.

Feng, S., Xiao, H., and Geng, J. (2020). Bond strength between concrete substrate and repair mortar: Effect of fibre stiffness and substrate surface roughness. Cement and Concrete Composites, Vol. 114, 103746.DOI: 10.1016/j.cemconcomp.2020.103746.

Ibragimov, R. A. and Korolev, E. V. (2022). Influence of electromagnetic field on characteristics of crushed materials. Magazine of Civil Engineering, No. 114 (6), 11408. DOI: 10.34910/MCE.114.8.

Ibragimov, R. A., Korolev, E. V., Deberdeev, T. R., and Leksin, V. V. (2019). Efficient complex activation of Portland cement through processing it in the vortex layer machine. Structural Concrete, Vol. 20, Issue 2, pp. 851–859. DOI: 10.1002/suco.201800008.

Kalyadin, A. Yu., Nalbandyan, G. V., Soloviev, V. G., Bogdanova, A. A., and Ushkov, V. A. (2019). Plasma modification of construction mortar components, an efficient method of increasing their performance. Vestnik MGSU (Monthly Journal on Construction and Architecture), Vol. 14, Issue 5, pp. 548–558. DOI: 10.22227/1997-0935.2019.5.548-558.

Khamatova, A., Khozin, V., Khohryakov, O., and Yakovlev, G. (2017). Quick setting composition based on steelmaking metallurgical slag. In: 10th International Conference on Environmental Engineering, April 27–28, 2017, Vilnius, Lithuania. DOI: 10.3846/enviro.2017.026

Khozin, V. G., Khokhryakov, O. V., and Kozlov, R. V. (2021). The environmental rating of «carbonate» cements is low water demand and concrete based on them. Izvestija KGASU, No. 2 (56), pp. 60–66. DOI: 10.52409/20731523_2021_2_60.

Khuzin, A. and Ibragimov, R. (2021). Processes of structure formation and paste matrix hydration with multilayer carbon nanotubes additives. Journal of Building Engineering, Vol. 35, 102030. DOI: 10.1016/j.jobe.2020.102030.

Li, Z., Lao, J., Wang, L., Lim, N. S., Tan, K. H., and Qian, S. (2022). A review on substitution of natural sand with granite fines in sustainable concrete. Construction and Building Materials, Vol. 346, 128417. DOI: 10.1016/j.conbuildmat.2022.128417.

Ma, C.-K., Mohd Apandi, N., Sofrie, C. S. Y., Ng, J. H., Lo, W. H, Awang, A. Z., and Omar, W. (2017). Repair and rehabilitation of concrete structures using confinement: A review. Construction and Building Materials, Vol. 133, pp. 502–515. DOI: 10.1016/j.conbuildmat.2016.12.100.

Rong, H., Dong, W., Yuan, W., Zhou, X. (2021). An improved ring test to assess cracking resistance of concrete under restrained shrinkage. Theoretical and Applied Fracture Mechanics, Vol. 113, 102976. DOI: 10.1016/j.tafmec.2021.102976.

Ruslan, I., Ruslan, B., and Evgenij, K. (2022). The effect of metal and polypropylene fiber on technological and physical mechanical properties of activated cement compositions. Case Studies in Construction Materials, Vol. 16, e00882. DOI: 10.1016/j.cscm.2022.e00882.

Shen, D., Liu, X., Zeng, X., Zhao, X., and Jiang, G. (2020). Effect of polypropylene plastic fibers length on cracking resistance of high performance concrete at early age. Construction and Building Materials, Vol. 244, 117874. DOI: 10.1016/j.conbuildmat.2019.117874.

Shen, D., Liu, X., Li, Q., Sun, L., and Wang, W. (2019). Early-age behavior and cracking resistance of high-strength concrete reinforced with Dramix 3D steel fiber. Construction and Building Materials, Vol. 196, pp. 307–316. DOI: 10.1016/j.conbuildmat.2018.10.125.

Sun, J., Wang, Y., Liu, S., Dehghani, A., Xiang, X., Wei, J., and Wang X. (2021). Mechanical, chemical and hydrothermal activation for waste glass reinforced cement. Construction and Building Materials, Vol. 301, 124361. DOI: 10.1016/j.conbuildmat.2021.124361.

Teixeira, O. G., Geraldo, R. H., da Silva, F. G., Gonçalves, J. P., and Camarini, G. (2019). Mortar type influence on mechanical performance of repaired reinforced concrete beams. Construction and Building Materials, Vol. 217, pp. 372–383. DOI: 10.1016/j.conbuildmat.2019.05.035.

Wang, L., He, T., Zhou, Y., Tang, S., Tan, J., Liu, Z., and Su, J. (2021). The influence of fiber type and length on the cracking resistance, durability and pore structure of face slab concrete. Construction and Building Materials, Vol. 282, 122706. DOI: 10.1016/j.conbuildmat.2021.122706.

Yang, J., Wang, R., and Zhang, Y. (2020). Influence of dually mixing with latex powder and polypropylene fiber on toughness and shrinkage performance of overlay repair mortar. Construction and Building Materials, Vol. 261, 120521. DOI: 10.1016/j.conbuildmat.2020.120521.




DOI: https://doi.org/10.23968/2500-0055-2022-7-4-60-69

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ISSN: 2500-0055