Dependence of energy consumption in terms of 1 m 3 of concrete when using cements of different specific surface

Objective. The aim of the study is to find rational ways to change the total energy consumption spent on cement production in terms of 1 m3 of concrete.

Method. To obtain reliable data, experimental and laboratory methods for testing cement were used.

Result. Tests have shown that at constant concrete strength, the consumption of cement per 1 m³ of concrete decreases with an increase in the specific surface of the binder, especially significantly in the case of Portland slag cement. The calculation results show that with an increase in the specific surface area of cements, the total energy consumption for their production, referred to 1 m³ of concrete of the same strength, decreases, and most significantly with an increase in the specific surface area of cements from 300 to 400 m² /kg and less from 400 to 500 m² /kg.

Conclusion. To reduce the energy intensity of concrete, it is necessary to use cements ground much thinner than they are ground at cement plants in open-type mills, despite the increase in energy consumption. Cements with high fineness of grinding can reduce the cycle of heat and moisture treatment of concrete products. Reducing the cycle allows to increase the turnover of molds and labor productivity at precast concrete plants, as well as further reduce energy consumption for the production of prefabricated reinforced concrete structures.

1. GOST 31108-2020 General construction cements. Specifications. (In Russ)

2. GOST 30515-2013 Cements. General specifications. (In Russ)

3. GOST 30744-2001 Cements. Test methods using polyfractional sand. (In Russ)

4. Artamonov A.V., Kushka V.N. Heavy concretes based on cements of various grinding methods. [Stroitel'nyye materialy] .Construction Materials. 2008; 3: 50-51. (In Russ)

5. Vasilik G.Yu., Grikevich L.N., Kalabukhov V.A. State of the cement industry in Russia and ways out of the crisis. [Concrete technologies]Concrete Technologies, 2009; 11-12: 38-40 (In Russ)

6. Verdiyan M.A., Nesmeyanov N.P., Vedritsky V.V. A new criterion for evaluating the energy efficiency of various mills. Building materials, equipment, technologies of the 21st century, P1, Methodological foundations. 2004; 7:. 44-46. (In Russ)

7. Verdiyan M.A., Nesmeyanov N.P., Vedritsky V.V. New criterion for evaluating the energy efficiency of the operation of various mills. Building materials, equipment, technologies of the 21st century, P2, calculations and experiments. 2003; 8: 50-51. (In Russ)

8. De Werdt K. Methods for determining the fineness of grinding and grindability. [Tsement i yego primeneniye] Cement and its application. 2010; 5: 113-116. (In Russ)

9. Dobshits L.M., Kononova O.V. Strength and durability of concrete depending on the dispersion of cement and fillers. In the collection: Concrete and reinforced concrete - a look into the future. Scientific works of the III All-Russian (II International) Conference on Concrete and Reinforced Concrete: 2014; 7: 279-290. (In Russ)

10. Druholsky V.K., Stepanov K.V., Trandofirov A.A., Stefanenko I.V. Methods for measuring the fineness of cement grinding. [Vestnik Volgogradskogo gosudarstvennogo arkhitekturno-stroitel'nogo universiteta. Seriya: Stroitel'stvo i arkhitektura] Bulletin of the Volgograd State University of Architecture and Civil Engineering. Series: Construction and architecture. 2017; 49 (68): 21-29. (In Russ)

11. Zlobin I.A., Mandrikova O.S., Borisov I.N. Cement The method of mechanical action during grinding as a factor determining the formation of the qualitative characteristics of cement and its application. 2016; 1:158-162 (In Russ)

12. Krutilin A.A., Krapchetova T.V., Pakhomova O.K., Inkova N.A. Investigation of the effect of slag input during clinker grinding on the strength characteristics of the resulting cement under the conditions of Sebryakovcement JSC. [Vestnik Volgogradskogo gosudarstvennogo arkhitekturno-stroitel'nogo universiteta. Seriya: Stroitel'stvo i arkhitektura] Bulletin of the Volgograd State University of Architecture and Civil Engineering. Series: Construction and architecture. 2021; 2 (83): 46-52. (In Russ)

13. Kuzmenkov M.I., Lukash E.V. Energy saving when grinding cement. In the collection: Resource and energy saving technologies and equipment, environmentally friendly technologies. Proceedings of the International Scientific and Technical Conference. Belarusian State Technological University. 2014; 228-231. (In Russ)

14. Guidelines for laboratory work on the discipline "Chemistry of cement" for students of specialty 2906. Kazan: KGASU, 2007;16. (In Russ)

15. Nesmeyanov N.P., Matusov M.G., Kartygin A.V., Magometov R.R. Features of reducing energy consumption when grinding cement in ball mills. In the collection: Energy-saving technological complexes and equipment for the production of building materials. Interuniversity collection of articles. Edited by V.S. Bogdanov. Belgorod, 2018; 260-262. (In Russ)

16. Nesmeyanov N.P. Methodological bases for the development of a new criterion for evaluating the effectiveness of the cement grinding process. [Vestnik BGTU im. V.G. Shukhova] Belgorod State Technological University. V.G. Shukhov. 2005; 11: 196- 199. (In Russ)

17. Pirotsky V.Z. Modern systems for grinding Portland cement clinker and additives. St. Petersburg: TsPO "Information of education", 2000; 71. (In Russ)

18. Processes of grinding and classification in cement production. Proc. manual for students studying in the specialty 171600 "Mechanical equipment and technological complexes of enterprises building materials, products and structures" direction 653500 "Str-vo" Moscow, 2004. (In Russ)

19. Pyachev V.A., Kapustin F.L. Production and properties of clinker cements. Tutorial. Ekaterinburg: USTU-UPI, 2008; 322. (In Russ)

20. Pyachev V.A., Startseva L.A. The dependence of the energy intensity of concrete on the fineness of grinding of the cement used.[Tekhnologiya betonov] Concrete technology. 2010; 5-6 (46-47): 36-37. (In Russ)

21. Romanovich A.A. Energy-saving equipment for grinding cement In the collection: Actual problems of the development of the road complex. [Vestnik BGTU im. V.G. Shukhova] Belgorod State Technological University. V.G. Shukhov. 2016; 104-110 (In Russ)