This study aims to examine the implications of amorphous metallic fibers on the mechanical and long-term properties of concrete pavement. Two different amounts of amorphous metallic fibers were incorporated into concrete, and plain concrete without fibers was also adopted as comparison. Test results indicated that the overall mechanical properties of concrete were improved by including the fibers, and the improvement increased when a higher amount of fibers was used. In particular, the equivalent flexural strength and flexural strength ratio were substantially improved by incorporating the amorphous metallic fibers. This may enable the thickness of airfield concrete pavement to decrease. The resistance to surface cracking of concrete pavement by repeated wheel loading was also improved with the addition of amorphous metallic fibers. In addition, by adding 5 kg/m3 and 10 kg/m3 amorphous metallic fibers in concrete pavement, roughly 1.2 times and 3.2 times longer service life was expected, respectively, as compared to their counterpart (plain concrete). Based on a life cycle cost analysis, the use of amorphous metallic fibers in concrete pavement was effective at decreasing the life cycle cost compared to plain concrete pavement, especially for severe traffic conditions.
W niniejszym artykule, stanowiącym kontynuację rozważań przedstawionych w numerze 8-9/2008 „Magazynu Autostrady”, poruszono aplikacyjne aspekty zagadnień dotyczących wyznaczania naprężeń w betonowych nawierzchniach spoczywających na sprężystym podłożu. W tej części zostaną zaprezentowane wyniki analiz wpływu na naprężenia wartości zakładanej sprężystości podłoża oraz wyniki obliczeń porównawczych, wykonanych za pomocą komercyjnych programów bazujących na metodzie elementów skończonych (MES).
EN
This article, which is a continuation of the theses presented in the issue 8-9/2008 of the „Autostrady” magazine, focuses on the application aspects of the determination of stresses in the concrete surfaces resting on elastic ground. Currently, within easy reach, there are tools, which either facilitate calculations of these complex mathematical equations, which describe the engineering problems, or they solve the problems by means of implementing the finite elements method (FEM).
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