2017 - Australia - A layered pavement structural and remaining capacity model by analysis of FWD and TSD data

Although pavements are built on structural principles, maintenance is usually triggered by surface condition. Readily available structural indicators would allow selection of more appropriate cost effective treat ments. The challenge was to deliver a low cost reliable structural indicator to satisfy the above need. The ob jective was to achieve this reliability by FWD data, and provide consistent outcomes regardless of date of survey. Low cost, and linear intensity, was to be achieved by porting of the model to TSD data. The Paper describes an innovative back-analysis of FWD data, delivering a layered model by pavement type, seasonally adjusted. Remaining capacity estimation follows, also by pavement type. An example is shown of the similarity between FWD and TSD based outcomes. KEY WORDS: TSD, FWD, SNP, Pavement remaining life.