CBR-Beta Design Procedure for Aggregate-Surfaced Airfield Pavements.

摘要

During contingency operations, aircraft are required to land, taxi, and take off on unpaved surfaces. Limited time available to establish airfield operations may not allow for the construction of paved surfaces. The original flexible pavement design procedure of paved surfaces, which is based on the California Bearing Ratio (CBR) and the -factor (Alpha-factor), was also extended and applied to the design and evaluation of aggregate-surfaced pavements. With the reformulation of the CBR-Alpha for the design of flexible pavements, efforts were also directed in defining a new equation for the design of aggregate-surfaced airfields. This report presents the development of a new CBR-Beta procedure for the design and evaluation of aggregate-surfaced airfields. Data from previous studies conducted on aggregate-surfaced, full- scale test sections were used for this purpose. The new performance curve proposed in this report for aggregate-surfaced airfields has the same equation format as that proposed and accepted for flexible pavements.