Algorithm for Analyzing Deviations and Irregularities in the Functioning of the Airline's Structural Units and Personnel in the Face of Uncertainty

In this paper, the production of aggregate from car windshield cullet and the use of this aggregate, in various compositions with fine quartz sand, as the reinforcing phase of the epoxy matrix polymer concrete were used and the obtained samples were tested. The bending and compressive strength, Charpy’s impact resistance tests were performed on the obtained composites. The porosity, water absorption, and density were also determined. The tests performed have shown that the application of car windshield cullet in polymer concrete, seems to be a good way to recycle this waste. The highest compressive strength, equal to 101 MPa, was obtained by composites containing 20 vol% of milled glass. It is nearly 7 times higher than the value of traditional concrete tested simultaneously, which has about 15 MPa. The highest flexural strength was noted for the composite containing 35 vol% of the glass. Polymer concrete samples did not show high impact resistance, which was in the range of 5.85 - 10.13 kJ/m2 . However, it increases with increasing glass content and the highest value was obtained for the composite containing 50% of the glass volume. Among the polymer concrete samples, the best properties were obtained for the mixture of 35% sand, 35% ground glass and 30% epoxy resin. Open porosity of traditional concrete is 15.9%, and for polymer concrete it was lower than 0.38%. The large difference in open porosity and water absorption for traditional concrete and polymer concrete, allow us to conclude that the latter will have higher frost resistance. The test results clearly show the significantly better mechanical properties of polymer concrete than of traditional concrete.

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“…Cząstki o małej średnicy powinny wypełniać przestrzenie pomiędzy większymi ziarnami, nawet o dużych wymiarach (13,14,24).…”

Section: Formalnie Jest To Rodzaj Kompozytu Z Osnową Polimerową [Kop]unclassified

“…Very important is proper composing the stack of various particles, in order to approve maximum fi lling. The low-diameter particles should fi ll the spaces between coarse big-diameter ones, optimally (13,14,24).…”

Section: Introductionmentioning

confidence: 99%

The application of automotive glass waste in the production of epoxy polymer concrete

et al. 2021

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Theoretical and Methodological Approaches to the Information Base for an Airline’s Flight Safety System

Bitiņš

Bogdane²,

Shestakov

et al. 2022

Transactions on Aerospace Research

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This article presents a model and an algorithm for identifying, collecting, processing, analyzing and using data on risks at an airline (deviations from the standards in the activities of various airline units and personnel) to minimize them and thereby to achieve an acceptable level of flight safety. A methodology is also presented for formulating the composition of flight safety indicators, based on an expert approach, for the units and personnel of the airline, making decisions in this field in various areas of its activities. The model is based on the quality and flight safety systems that form part of an integrated management system at one of Latvia’s airlines. The system makes it possible to analyze safety aspects on the basis of actual information drawn from various sources into the airline’s information base, where it is collected, classified, stored and analyzed.

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Algorithm for Analyzing Deviations and Irregularities in the Functioning of the Airline's Structural Units and Personnel in the Face of Uncertainty

Cited by 2 publications

References 16 publications

The application of automotive glass waste in the production of epoxy polymer concrete

The application of automotive glass waste in the production of epoxy polymer concrete

Theoretical and Methodological Approaches to the Information Base for an Airline’s Flight Safety System

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