Title page for ETD etd-04202011-160003

Type of Document Master's Thesis
Author Cooper III, Samuel Booth
Author's Email Address scoop15@lsu.edu
URN etd-04202011-160003
Title Evaluation of Volumetric and Mechanistic Properites of Asphalt Mixtures: Laboratory vs. Field
Degree Master of Science in Civil Engineering (M.S.C.E.)
Department Civil & Environmental Engineering
Advisory Committee
Advisor Name Title
Mohammad, Louay N. Committee Chair
Elseifi, Mostafa Committee Member
Shin, Hak-Chul Committee Member
  • sample type
  • contractor
  • state
  • asphalt mixture
  • variability
Date of Defense 2011-03-21
Availability unrestricted
The maintenance and growth of the United States infrastructure is vital to the economic,

social, and cultural success of the country. For this reason significant resources must be

allocated to ensure adequate paving mixtures are designed, produced, and constructed. A critical

issue that has received considerable attention in recent years is to identify and quantify causes,

sources, and levels of variability in volumetric and mechanical properties of the mixture. This

requires evaluation of three possible scenarios for production of asphalt mixture specimens: (1)

laboratory mixed and laboratory compacted specimens (LL), (2) plant mixed and laboratory

compacted specimens (PL), and (3) plant mixed and field compacted specimens (PF). The

objective of this project was to quantify sources and causes of variability in the measurements of

volumetric and mechanical properties of dense-graded asphalt mixtures for three types of

specimens. This was accomplished by collecting and reviewing published and unpublished

national information on studies conducted to evaluate the variability of volumetric and

mechanical properties of asphalt mixtures, and current practices adopted by the states to

incorporate variability in the specifications. The researcher surveyed highway agencies and

contractors that may have been able to provide data. Statistical analyses, including a metaanalysis

were conducted based on the collected data. This research reports levels of variability

for a wide range of volumetric and mechanical properties. Also, the levels of variability were

comparable for various state departments of transportations (DOTs) located in different climatic

regions. Additionally, nominal maximum aggregate size (NMS) of asphalt mixtures appears to

influence the levels of variability observed for the various volumetric and mechanical properties.

This report finds additional research is required to determine the cause of the variation between

the three sample types with respect to process-based factors.

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