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Accession Number PB2013-111560
Title Quality Control/Quality Assurance Testing for Joint Density and Segregation of Asphalt Mixtures.
Publication Date Apr 2013
Media Count 66p
Personal Author C. Chen H. D. Lee R. C. Williams T. Ahmend
Abstract Longitudinal joint quality control/assurance is essential to the successful performance of asphalt pavements and it has received considerable amount of attention in recent years. The purpose of the study is to evaluate the level of compaction at the longitudinal joint and determine the effect of segregation on the longitudinal joint performance. Five paving projects with the use of traditional butt joint, infrared joint heater, edge restraint by milling and modified butt joint with the hot pinch longitudinal joint construction techniques were selected in this study. For each project, field density and permeability tests were made and cores from the pavement were obtained for in-lab permeability, air void and indirect tensile strength. Asphalt content and gradations were also obtained to determine the joint segregation. In general, this study finds that the minimum required joint density should be around 90.0% of the theoretical maximum density based on the AASHTO T166 method. The restrained-edge by milling and butt joint with the infrared heat treatment construction methods both create the joint density higher than this 90.0% limit. Traditional butt joint exhibits lower density and higher permeability than the criterion. In addition, all of the projects appear to have segregation at the longitudinal joint except for the edge-restraint by milling method.
Keywords Aggregates
Asphalt pavements
Fatigue life
Highway construction
Hot mix paving mixtures
Mechanical properties
Quality assurance
Quality control

Source Agency Federal Highway Administration
NTIS Subject Category 50A - Highway Engineering
50C - Construction Equipment, Materials, & Supplies
89G - Construction Materials, Components, & Equipment
Corporate Author Iowa State Univ., Ames. Institute for Transportation.
Document Type Technical report
Title Note Final rept.
NTIS Issue Number 1325
Contract Number N/A

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