01045585

Component

https://doi.org/10.3141/2040-13

http://scholar.google.com...uler&publication_year=2007

The Superpave® mix design method has been used by the Colorado Department of Transportation since 1995. Initially, the number of design gyrations used was as recommended by SHRP research. However, the asphalt contents of these preliminary paving mixtures were lower than what had been historically successful for similar dense graded mixtures under similar conditions. This lower asphalt content began leading to premature moisture damage failures. Therefore, a study was initiated to determine how the pavements constructed according to the original Superpave compaction criteria densified under traffic. An experiment was designed to evaluate the in situ voids in 22 full-scale pavements over a 6-year period. Projects were selected on the basis of variation in traffic, environment, temperature, and elevation. Results of this research indicate that the original number of design gyrations recommended by SHRP for field-mixed–laboratory-compacted materials results in pavements that did not compact sufficiently under traffic, resulting in higher air voids than desired after 3 years service. An adjustment to the original SHRP design gyration levels was done in a subsequent study based on NCHRP research. The result of this revision has been a decrease in voids levels after 3 years of service with a corresponding improvement in performance. Further fine-tuning is needed and will be implemented in the future.

01091297

English

pp 115-122

2007

Transportation Research Record: Journal of the Transportation Research Board

9780309113045

Print

Figures (6) ; References (5) ; Tables (8)

Air voids; Asphalt content; Asphalt mixtures; Compaction; Construction management; Pavement design; Pavement performance; Paving; Superpave; Traffic loads

Gyratory compaction

Colorado

Construction; Freight Transportation; Highways; Materials; Pavements; I31: Bituminous Binders and Materials; I52: Construction of Pavements and Surfacings

PRP, TRIS, TRB

Feb 8 2007 4:58PM

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• Range Imaging as Emerging Optical Three-Dimension Measurement Technology
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