English
Русский 32-39 p.
Сonstruction, repair and reconstruction of roads require high costs of mineral raw materials in the form of sand, gravel, mineral powder. However, its reserves on the territory of our country are distributed unevenly, which causes significant transportation costs for the delivery of mineral resources to construction sites. In addition, mineral resources are inevitably reduced over time, which requires extensive involvement in the construction of roads of non-traditional types of raw materials, as well as industrial waste.
The paper presents the results of studies of the properties of electric steel slag, the current output and stored in the dumps for several years. The main component of electric steel-smelting slags, both fresh and dumped, lying in dumps for about 20 years, is shannonite or γ-modification of calcium orthosilicate C2S. It has been established that the mineralogical composition of the Oskol Electrometallurgical Combine's slag is represented by hematite, wuistite, calcite, periclase, and also portlandite, formed during quenching of lime. Analysis of diffractograms of slags of different shelf life shows that in the initial periods of slag storage in the dumps there is a final quenching of lime and its carbonization with the formation of calcite. The results of the determination of the granulometric composition of the slag of different storage periods showed a decrease with time of the number of fine fractions and an increase in large fractions. It is established that when using electric steel-smelting slags in the construction and repair of highways, it is necessary to take into account changes in the physical and mechanical properties of materials. The processes that take place during the maintenance of slags in dumps determine the suitability of the use of slag mineral materials in road con-struction.
The paper presents the results of studies of the properties of electric steel slag, the current output and stored in the dumps for several years. The main component of electric steel-smelting slags, both fresh and dumped, lying in dumps for about 20 years, is shannonite or γ-modification of calcium orthosilicate C2S. It has been established that the mineralogical composition of the Oskol Electrometallurgical Combine's slag is represented by hematite, wuistite, calcite, periclase, and also portlandite, formed during quenching of lime. Analysis of diffractograms of slags of different shelf life shows that in the initial periods of slag storage in the dumps there is a final quenching of lime and its carbonization with the formation of calcite. The results of the determination of the granulometric composition of the slag of different storage periods showed a decrease with time of the number of fine fractions and an increase in large fractions. It is established that when using electric steel-smelting slags in the construction and repair of highways, it is necessary to take into account changes in the physical and mechanical properties of materials. The processes that take place during the maintenance of slags in dumps determine the suitability of the use of slag mineral materials in road con-struction.
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3. Prihod'ko Je.V. Fiziko-himicheskaja model' struktury shlakovyh rasplavov. Stal'. 1990. 10. P. 14 – 21. (rus)
4. Masson C.R., Smith I.B., Whiteway S.G. Molecuiar Size Distribution in Multichain Polymers: Application of Polymer theory of to Silicate Metls. Can J Chem. 1970. 48. P. 33 – 45.
5. Masson C.R., Smith I.B., Whiteway S.G. Activities and lonic Distribution in Liquid Silicates: Application of Polymer theory. Can J Chem. 1970. 48. P. 1456 – 1464.
6. Gaskel D.R. The Thermodynamicproperties of the Masson Polymerization Models of Liquid Silicates. Met. Trans. 1973. 4 (1). P. 185 – 192.
7. Gaskel D.R. Activities and Free Energies of Mixing in Binary Silicate Melts. Met. Trans. 1977. 8 (1). P. 131 – 145.
8. Shapovalov N.A., Zagorodnjuk L.H., Tikunova I.V., Shhekina A.Ju., Shkarin A.V. Shlaki metallur-gicheskogo proizvodstva – jeffektivnoe syr'e dlja polucheni suhih stroitel'nyh smesej. Fundamental'nye issledovanija. 2013. 1-1. P. 167 – 172. (rus)
9. Podol'skij V.P., Duhovnyj G.S., Pogromskij A.S. Opyt ispol'zovanija jelektrostaleplavil'nyh shlakov v sostave mineral'noj chasti asfal'tobetonov. Nauchnyj vestnik VGASU. Serija: Dorozhno-transportnoe stroitel'stvo. 2004. 2. P. 136 – 138. (rus)
10. Duhovnyj G.S., Logvinenko A.A. Vjazhushhie betony na osnove jelektrostaleplavil'nyh shlakov. Avtomobil'nye dorogi. 2008. 12. P. 126 – 128. (rus)
11. Busel A.V., Kalyska O.A., Smykovskij A.I. Primenenie samootverzhdajushhihsja shlakovyh smesej dlja ustrojstva sloev dorozhnyh odezhd. Avtomobil'nye dorogi i mosty. 2011. 1. P. 65 – 68. (rus)
12. Rahimbaev Sh.M., Jashurkaeva L.I., Mos'pan V.I. Othody obogashhenija zheleznyh rud KMA – syr'e dlja proizvodstva cementa. Belgorod: Izd-vo BGTU im. V.G. Shuhova, 2012. 154 p. (rus)
13. Kalyska O.A., Busel A.V. Aktivacija processov tverdenija jelektrostaleplavil'nyh shlakov i blokirovanie ionov tjazhelyh metallov. Stroitel'stvo. Prikladnye nauki. Stroitel'nye materialy. 2015. 8. P. 83 – 87. (rus)
14. Podol'skij Vl.P., Slepcova O.V., Kukina O.B., Lukashuk A.G. Rezul'taty kachestvennyh issledovanij kompozitov na osnove staleplavil'nyh konverternyh shlakov NLMK. Nauchnyj zhurnal stroitel'stva i arhitektury. 2015. 3 (39). P. 45 – 53. (rus)
15. Rukovodstvo po rentgenovskomu issledovaniju mineralov. Pod red. V.A. Frank-Kameneckogo. L.: Nedra, 1975. 399 p. (rus)
16. Rentgenografija. Specpraktikum. V.A. Avdohina i dr. Pod obshhej redakciej A.A. Kancel'sona. M.: Izd-vo Mosk. Universiteta, 1986. 240 p. (rus)
17. Umanskij L.S., Skakov Ju.L., Ivanov A.N. i dr. Kristallografija, rentgenografija i jelektronnaja mikroskopija. M.: Metallurgija, 1982. 632 p. (rus)
18. Gorshkov V.S., Timashev V.V., Savel'ev V.G. Metody fiziko-himicheskogo analiza vjazhushhih veshhestv. M.: Vyssh. shkola, 1981. 335 p. (rus)
19. Ramachandran V.S., Fel'dman M. R. Primenenie differencial'nogo termicheskogo analiza v himii ce-mentov.: Strojizdat, 1977. 408 p. (rus)
20. Zhuravlev P.V. Sintez nizkoosnovnogo malojenergoemkogo klinkera s ispol'zovaniem shlakov i poluchenie vysokokachestvennogo smeshannogo cementa: avtoref. dis. … kand. tehn. nauk. Belgorod: BelGTASM. 2000. 16 p. (rus)
21. Shilova I.A. Jenergosberezhenie i povyshenie kachestva cementnogo klinkera s ispol'zovaniem shlako-melo-izvestkovogo komponenta: avtoref. dis. ... kand. tehn. nauk. Belgorod: BGTU im. V.G. Shuhova. 2007. 19 p. (rus)
Pogromsky A.S., Anikanova T.V. The effect of long-term storage of electric steel smelting slags in dumps on their properties. Construction Materials and Products. 2018. 1. (1). P. 32 – 39. https://doi.org/10.34031/2618-7183-2018-1-1-32-39