Properties of Foam Concrete During Their Dispersed Reinforcement with Synthetic and Carbon Fibers

The relevance of expanding the range of products made of gas-filled concrete is reflected. It is shown that the differences in the list of types of products made of autoclave silicate and non-autoclave foam concrete are based on their individual performance properties, which in equally dense concretes differ significantly in crack resistance and tensile strength during bending. The reasons for the growing demand for energy-efficient building materials are listed. The results of experimental studies of the effect of polypropylene and carbon fibers of various lengths on the ultimate extensibility and the initial modulus of tensile elasticity during bending of non-autoclaved foam concrete of the D700 brand are presented. It is established that high-modulus carbon fibers allow improving the structural properties of foam concrete and do not fundamentally change the nature of the destruction of the material under the action of bending and tensile loads. Polypropylene dispersed reinforcement is able to effectively control the parameters of the ultimate extensibility of foam concrete and contribute to a significant increase in the energy intensity of their destruction. The achieved results make it possible to predict an increase in the durability of operation of foam concrete dispersed reinforced with polypropylene fibers intended for use as wall materials.

V.N. MORGUN¹, Candidate of Sciences (Engineering) (This email address is being protected from spambots. You need JavaScript enabled to view it.);
L.V. MORGUN², Doctor of Sciences (Engineering) (This email address is being protected from spambots. You need JavaScript enabled to view it.)

¹ Southern Federal University (105/42, Bolshaya Sadovaya Street, Rostov-on-Don, 344006, Russian Federation)
² Don State Technical University (1, Gagarin Square, Rostov-on-Don, 344001, Russian Federation)

1. Mehlhart G., Bakas I., Herczeg M., Strosser P., Rynikiewicz C. Agenais study on the energy saving potential of increasing resource efficiency. Final Report. Luxembourg: Publications Office of the European Union. 2016. 86 p. http://ec.europa.eu/environment/enveco/resource_efficiency/pdf/final_report.pdf
2. Federal Law No. 261-FZ of November 23, 2009 “On Energy Conservation and on Improving Energy Efficiency”.(In Russian)
3. Vishnevsky A.A., Grinfeld G.I., Smirnova A.S. Production of autoclaved aerated concrete in Russia. Stroitel’nye Materialy [Construction Materials]. 2015. No. 6, pp. 52–54. (In Russian).
4. Davidyuk A.A., Fiskind E.S., Gusar’ O.A., Balakireva V.V. Advantages in production and application of cellular concrete blocks. Stroitel’nye Materialy [Construction Materials]. 2018. No. 12, pp. 41–43. DOI: https://doi.org/10.31659/0585-430X-2018-766-12-41-43 (In Russian).
5. Paruta V.A. Mechanics of destruction of the system “aerated concrete masonry – plaster coating”. Magazine of Civil Engineering. 2014. No. 3, pp. 48–55. (In Russian).
6. Album of technical solutions for the use of autoclaved aerated concrete products trademark “N +N” in the construction of residential, public and industrial buildings. Materials for design and working drawings of nodes. SPb. 2019. 152 p. https://www.hplush.ru/documents/20562/55438/albom_H%2BH_Redaction02-2019.pdf/1401b576-14f7-4dda-aae0-2791e4ec26f8 (In Russian)
7. Falikman V.R., Sorokin Yu.V., Kalashnikov O.O. Construction and technical properties of especially high-strength fast-hardening concrete. Beton i Zhelezobeton [Concrete and Reinforced Concrete]. 2004. No. 4, pp. 5–10. (In Russian).
8. Bonakdar A., Babbitt F., Mobasher B. Physical and mechanical characterization of Fiber-Reinforced Aerated Concrete (FRAC). Cement and Concrete Composites. 2013. Vol. 38, pp. 82–91. https://doi.org/10.1016/j.cemconcomp.2013.03.006
9. Morgun V.N., Morgun L.V., Nagorskiy V.V. Diversive particles filler forms influence on mechanical properties foam concrete mixutes. IOP Conference Series: Materials Science and Engineering. Vol. 698. Iss. 2. 022088. https://iopscience.iop.org/article/10.1088/1757-899X/698/2/022088
10. Morgun V.N., Morgun L.V. Substantiation of one of the methods for improving the structure of foam concretes. Stroitel’nye Materialy [Construction Mate-rials]. 2018. No. 5, pp. 24–26. DOI: https://doi.org/10.31659/0585-430X-2018-759-5-24-26 (In Russian).
11. Morgun V., Morgun L., Votrin D., Nagorskiy V. Analysis of the synthetic fiber influence on the cement stone new formations composition in foam concrete. Materials Science Forum. 2021. Vol. 1043, pp. 43–48.
12. Patent RF No. 2714541 Bullet-absorbing material (fiber foam concrete) and method for its manufacture. Votrin D.A., Morgun L.V., Visnap A.V., Morgun V.N. Declareted 25.07.2019. Published 18.02.2020. (In Russian).
13. Certificate of fire safety SSPB. RU. OP034. N 00037. “Fibro-foam concrete products” according to TU 5767-033-02069119–2003 comply with fire safety requirements established in NPB 244–97: non-combustible material according to GOST 30244–94 “Building materials. Methods of testing for combustibility”. (In Russian).