Abstract: The article presents the application of a cement substitute in the form of natural zeolite to cement concrete. The reference mix design intended for communications surfaces and a mix of modified composition taking into consideration zeolite content were prepared. The basic parameters of concrete mix components were specified, including basalt aggregate, cement and zeolite. The influence of the applied zeolite of a grain-size distribution up to 50µm on the obtained parameters of concrete mix and hardened concrete was determined. It was observed that the applied zeolite contributes to the modification of the internal structure of concrete composite and consequently to the increase of the mechanical and physical parameters of hardened concrete tested within diversified standard periods of time. Due to the fact that the resistance of concrete to cyclic freezing and thawing is the determinant of concrete durability, in the case of pavement structure, hardened concretes were subject to a frost resistance assessment. The influence of zeolite content on both internal and external frost resistance of hardened concrete was specified. SEM observations of the internal structure of concretes exposed to the influence of freezing-thawing cycles proved the advantageous changes of zeolite occurrence in concrete mix. A reduction of cement quantity and its replacement thereof with the suggested zeolite allows obtaining a pavement quality concrete of a more favourable internal micro structure and distinguished by higher parameters.
B I B L I O G R A F I A1. G. Bundyra-Oracz, D. Siemaszko-Lotkowska, "Zeolite – puzzolan additive to concrete”, Building industry, Production Engineering, Architecture, vol. 4, pp. 72-74, 2010.
2. PN-EN 1097-7: 2008 Investigations of mechanical and physical properties of aggregates - Part 7: Determination of filler density - Pycnometric method.
3. PN-EN 1097-6:2013-11 Investigations of mechanical and physical properties of aggregates - Part 6: Determination of particle density and water absorption.
4. PN-EN 197-1:2012 Cement part 1: Composition, specyfications and conformity criteria for common cements.
5. PN-EN 1097-2:2010 Investigations of mechanical and physical properties of aggregates - Part 2: Methods for determining resistance to grinding.
6. NO 17-A204:2015 Airfield concrete pavements - Requirements and test methods for cement concrete pavements.
7. PN-EN 12350-6:2011 Testing fresh concrete. Part 6: Density.
8. PN-EN 12350-2:2011 Testing fresh concrete. Part 2: Testing the consistency with the cone fall method.
9. PN-EN 12350-7:2011 Testing fresh concrete. Part 7: Air content - Pressure methods.
10. PN-EN 12390-1:2013 Testing hardened concrete - Part 1: Shape, dimensions and other requirements for specimens and moulds.
11. PN-EN 12390-2:2011 Testing hardened concrete - Part 2: Making and curing speciments for strength tests.
12. PN-EN 12390-7:2011 Testing hardened concrete - Part 7: Desity of hardened concrete.
13. PN-EN 12390-3:2011 Testing hardened concrete - Part 3: Compressive strenth of test specimens.
14. PN-EN 12390-6:2011 Testing hardened concrete - Part 6: Tensile splitting strength of test specimens.
15. M. Linek, P. Nita “Pavement quality cement concrete of extended operational durability”, XXIX International Baltic Road Conference, Tallinn, 2017.
16. PN-EN 12390-5:2011 Testing hardened concrete - Part 5: Flexural strength of test specimens.
17. PN-EN 1542:2000 Products and systems for protection and repair of concrete structures - Test methods - Peel adhesion measurement
18. PN-EN 13892-3:2005 Methods for testing materials for undercoats - Part 3: Determination of abrasion resistance according to Bohme
19. PN-EN 12390-8:2011
20. M. A. Glinicki, “Durability of concrete in road surfaces. Effect of microstructure, materials design, diagnostics” (in Polish), IBDiM, Warsaw, 2011.
21. M. Linek, “Surface concrete with improved parameters of physical and mechanical on the loads caused by forced temperature” (in Polish), PhD Thesis, Kielce, 2013. 
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