SOME SPECIFIC FEATURES OF RESOURCE SAVING IN CONSTRUCTION

The Republic of Belarus possesses a limited number of important natural resources and their conservation is considered as one of the strategic directions for the development of construction industry. Regularities in resource saving can be used not only for cost-cutting at the expense of cheaper materials with worse properties but they can also be used under certain specific conditions for price formation through selection of expensive qualitative construction materials and products. Thus an analysis of changes in concrete price due to higher compressive strength has shown that the price per one concrete cubic metre is increasing much more slowly than an increase in strength. For this reason high-performance concrete is more advantageous in comparison with lowand medium-strength concrete. New comparative units for strength and other physical properties have been proposed for assessment of resource efficiency: unit price (in case of being used) and cost price (in case of being manufactured) make it possible to compare various materials and products and such approach is necessary while using steel tube confined concrete (STCC) structures in construction. Estimates suggest that high-strength concrete and tubes with minimum thickness of walls withstanding lateral pressure of a core which is deformed under load must be applied for STCC structures under normal operational conditions. In this context it is necessary to use damping devices for compensation of difference in characteristics of concrete and tube material and these devices ensure maximum safe load of concrete core and tube material.

1. Naumov V. D., Alyavdina T. I., Bedula N. V., Zholud' A. S., Zholud' T. V., Poslova T. G., Feofilova Yu. Yu., Frolova T. S. (compilers), Feofilov Yu. V. (ed.) (2008) Large Dictionary Reference Book of Construction Terminology:

2. Official and Unofficial Terms and Definitions in Construction, Architecture, Urban Planning and Construction Machinery. Minsk: Minsktipproyekt Publ. 811 (in Russian).

3. State Standard 30515–2013. Cement. General Technical Specifications. Minsk, State Standard Publishing House, 2016. 43 (in Russian).

4. State Standard 31108–2003. Standard Cement. Technical Specifications. Minsk, Minstroyarkhitektura Publishing House, 2005. 14 (1n Russian).

5. Concrete Cost in Minsk. Available at: http://betonminsk.by/ prodazha-betona/cena. (Date Access 13 December 2016) (in Russian).

6. Concrete Grades and Characteristics. Available at: http: // www.betontrans.by / produkcia/marki-i-harakteristikibetona. (Date Access 13 December 2016) (in Russian).

7. Concrete Cost Per Cube. Available at: http://atlantbeton.ru/ price. (Date Access 12 December 2016) (in Russian).

8. Leonovich S. N. (1999) Crack Resistance and Longevity of Concrete and Reinforced Concrete Elements in Terms of Force and Energy Criteria of Fracture Mechanics. Minsk, Board of “Tydzen”. 263 (in Rusian).

9. Sewell J. S. (1902) Columns for Buildings. Engineering News, 48 (17), 10–17.

10. Louksha L. K. (1977) Strength of Tube Confined Concrete. Minsk, Vysheyshaya Shkola Publ. 95 (in Russian).

11. Osipov S. N. (2013) Method for Improvement of Strength in Tube Confined Concrete Structure. Eurasian Patent No 017610 (in Russian).

12. Osipov S. N. (2015) Improvement of Strength in Tube Confined Concrete Structure Due to Complete Usage of Casing Effect. Tandem: Tsement i Stroitelstvo = Tandem: Cement & Construction, 11 (3), 48–50 (in Russian).

13. Pisarenko G. S. (ed.) (1973) Material Resistance. Kiev, Visha Shkola Publ. 671 (in Russian).

14. Marenin V. F. (1959) Research on Strength of Steel Pipes Filled with Concrete while Using Centric Compression. Moscow, Moscow Civil Engineering Institute of the Order of the Red Banner of Labour named ?fter V. V. Kuibyshev. 15 (in Russian).

15. Dolzhenko A. A. (1964) Research on Resistance of Tube Confined Concrete to Centric Compression. Sbornik Trudov Voronezhskogo Inzhenerno-Stroitel'nogo Instituta, Vyp. 1: Teoriya Sooruzhenii i Konstruktsii [Collected Papers of Voronezh Construction Engineering Institute. Issue 1: Theory of Buildings and Structures], (10), 31–40 (in Russian).

16. Sitnikov Yu. V. (1970) Research on Reinforced Concrete Elements with Steel Casing for Bearing Structures of Industrial Buildings. Voronezh, Voronezh Construction Engineering Institute. 32 (in Russian).

17. Bondarenko V. M. (2010) Resistance of Steel Tube Confined Concrete Elements of Round Section with Self-Stressing Concrete Core to Centric Compression. Minsk, Belarusian National Technical University. 19 (in Russian).

18. Circular Pipe. Available at: http://www.stalnoy.by/trubakruglaja. (Date Access 13 December 2016) (in Russian).