Strengthening airfield pavements with cement concrete layers

The paper presents original solutions and methodology for determining the thickness of cement concrete strengthening layers for repairing and upgrading existing flexible and rigid airfield pavements. Flow diagrams and nomograms for determining edge stress were developed. These are novel solutions which have not been presented in a similar form before now. After deriving the above relations, a method for the practical utilisation of the resulting monograms depending on the parameters of existing airfield pavement and properties of the cement concrete strengthening layer is presented. Preparing calculation-based charts using the derived equations will markedly shorten the procedure of selecting the thickness of cement concrete strengthening layers for existing flexible airfield pavements that require repair depending on the degree of their wear. Keywords: rigid airfield pavement, flexible airfield pavement, pavement strengthenin

The airport pavements reinforced with Mineral-Asphalt Mixtures’ (MAM) layers

The article presents original solutions, methodology, and procedure for determining the thickness of bituminous overlays for renovation and modernization of the existing airfield pavements.Using the Westergaard method, the algorithm and nomograms were developed in order to determine the edge stress and the loading force. The nomograms are a state of the art solutions that have never been presented in a similar form. After derivation of aforementioned dependencies, the practical way to use the nomograms, depending on the existing bituminous airport pavement, was demonstrated.The plots were developed on the basis of calculations using the derived equations. They will definitely facilitate the procedure of selecting the thickness of the flexible overlay to the airport pavements which require repair or modernization.[b]Keywords[/b]: airport rigid pavements, airport vulnerable pavements, strengthening the pavemen

Application of Westergaard Method for assessment of interaction of Hercules C-130 plane on airport pavement

The following paper describes original solution and methodology of calculating elastic pavements loaded by aircraft’s leg in arrangement of wheels in tandem.Using Border Load Capacity State Method, the authors have developed nomographs for determining the equivalent load, which could be further applied in Westergaard’s pavement calculation approach. Derived the state-of-the-art equation and nomographs have not been considered yet. For this reason, they are valuable sources of information for aircraft pavement designers.Considering the pavement loaded by military cargo aircraft (HERCULESERCULES C-130), the authors performed calculations of pavement stresses and its deflection in the function of pavement thickness and soil parameters. These computations resulted in obtaining diagrams presenting pavement stress variation in the function of parameters described herein.Diagrams obtained using Border Load Capacity State Method will certainly accelerate the procedure of calculating the construction of stiff pavements loaded by the aircrafts with tandem arrangement of wheels.[b]Keyword[/b][b]s[/b]: concrete airport pavements, capacity limit state method, system wheels in tande