Abstract: The paper presents theoretical background concerning the occurrence and propagation of imposed thermal load deep inside the structure of airfield pavement. The standard composition of low-shrink cement concrete intended for airfield pavements was presented. The influence of recurring temperature changes on the extent of occurred shrinkage deformations was assessed. The obtained lab test results, combined with observations and analysis of changes of the hardened concrete microstructure allowed to reach the conclusions. It was proved that the suggested concrete mix composition allows to obtain the concrete type of better developed internal microstructure. More micro air voids and reduced distance between the voids were proved, which provide increased frost resistance of concrete. The change of size, structure and quantity of the occurred hydration products in cement matrix and better developed contact sections resulted in the improvement of mechanical parameters of hardened concrete. Low-shrink concrete in all analysed cases proved the increased resistance to the variable environmental conditions. Increased concrete resistance is identified with the reduced registered shrinkage deformations and growth of mechanical parameters of concrete. Low-shrink concrete used for airfield structure guarantees the extended time of reliable pavement operation.
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