Effect of Michigan multi-axle trucks on pavement distress and profile : volume 1.
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2009-02-01
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Alternative Title:Volume1, Literature review and analysis of in-service pavement performance data
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Edition:Final report.
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Abstract:With the adoption of the new mechanistic-empirical pavement design method and the employment of axle load ; spectra, the question of evaluating the pavement damage resulting from different axle and truck configurations has ; become more relevant. In particular, the state of Michigan is unique in permitting several heavy truck axle ; configurations that are composed of up to 11 axles, sometimes with as many as 8 axles within one axle group. Thus, ; there is a need to identify the relative pavement fatigue damage resulting from these multiple axle trucks. ; The unconfined compression cyclic load test with loading cycle that simulate different axle/truck configurations was ; used to examine their relative effect on permanent deformation of an asphalt mixture. Five different axle ; configurations and five different truck configurations were studied. Indirect tensile tests were used for studying ; fatigue cracking of flexible pavements. The laboratory investigation indicates that the rutting damage due to ; different axle configurations is approximately proportional to the number of axles, indicating that the damage per ; load carried is constant for individual axles. However, the same is not necessarily true for trucks with different axle ; configurations. ; The fatigue life of a typical plain concrete mixture under different truck axle configurations was determined directly ; from a cyclic four point beam test by using load pulses that are equivalent to the passage of an entire axle group. ; Full scale slab testing was performed to study joint deterioration in jointed plain concrete pavements. The laboratory ; investigation indicates that the fatigue damage due to different axle configurations increases with increasing number ; of axles within an axle group for a given stress ratio. However, the results also indicate that for the multiple axles, ; the damage per axle is less than the single axle for the same stress ratio. Mechanistic analysis was also carried out to ; substantiate laboratory results and study specific case scenarios of loading and pavement damage.
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Main Document Checksum:urn:sha256:7385f6a2e85cfc04dfc58d8a5425ee3452169a1c519cd1f6d1d8f3b398767b4a