The main taxiways at Cape Town International Airport (CTI Airport) and sections of Kromboom Parkway (M5) were identified to be in urgent need of rehabilitation. Thick asphalt base layers were selected for providing the appropriate pavement rehabilitation structure in both projects. The aggressive wheel loading and environmental conditions necessitated a superior asphalt design methodology for these mixes. An innovative multi-level based design and construction methodology that incorporates mechanistic and structural layer needs analysis as well as volumetric, performance and construction criteria, was applied. Due to the extremely high wheel loads and tyre pressures on the CTI Airport Taxiway Rehabilitation contract, special emphasis was placed on deformation resistance testing. The Model Mobile Load Simulator (MMLS Mk3) was commissioned to evaluate the candidate mixes. The approved production mixes were tailor-designed for each unique structural and functional pavement need that they had to fulfil. (Author/publisher) For the covering entry of this conference, please see ITRD abstract no. E208431.
Samenvatting