Implementation of changes

Last year, I was working in AENA Airports (Madrid) as an intern in the Civil Engineering Division. I had to develop the Constructive Project “Valladolid Airport Runway Overlay”.
Basically the project consisted of the design and calculation of a new pavement to adapt the existing runway to the ICAO rules and improve the surface roughness. Before starting with my own design, I read and studied the solutions adopted in others' Overlay Projects in Spanish airports. In all of them, a regularization asphalt layer was applied to achieve the design slopes and after that, a surface layer was applied in order to achieve the desired roughness. The solution was absolutely valid and satisfactory. Nevertheless, because of the raising of the price of crude price, applying a regularization layer has become very expensive.

I thought about computerized milling as a new method for the correction of runway slopes, instead of the regularization layer. I designed the project surface using AutoCAD Civil 3D and I got in touch with several milling companies to discuss about the price and the viability of the computerized milling. We concluded the method was much cheaper and the company considered developing this new method in future experimental projects.

[Excellent English.]