PMSS Project Details

Project ID:	FHWA-PROJ-09-0035
Project Name:	Asphalt Pavement Embrittlement: Evaluating the Relationship Between Field and Lab Aging
Status:	Terminated
Contact:	Last Name: Gibson First Name: Nelson H Telephone: 202-493-3073 E-mail: nelson.gibson@dot.gov
Organization:	Federal Highway Administration - Turner-Fairbank Highway Research Center (TFHRC)
Office:	Office of Infrastructure Research and Development
Team:	Pavement Materials Team
Roadmap/Focus area(s):	Infrastructure Research and Technology Strategic Plan and Roadmap
Project Description:	This activity seeks to provide tools for agencies to be able to take more active measures against flexible pavement deterioration rather than passively observing cracking distress before taking action. Both full-scale mixture tests and reduced scale mixture tests are to be applied from the current research knowledge. The type of full-scale tests that will be applied are those that can be used in mix design and/or acceptance tests. The full-scale tests balance practicality with more engineering significance of cracking and damage because they are to be able to be performed in the asphalt mix performance tester (formerly simple performance tester) but go beyond \|E*\| stiffness. One test is viscoelastic continuum damage push-pull that provides continuum crack initiation context, and the second test is a fracture mechanics crack propagation type test. These are in harmony with Federal Highway Administration research stakeholders. The small-scale tests focus on viscoelastic properties generated from the ubiquitous Bending Beam Rheometer. This thrust is geared more towards surrogates of the full-scale mix tests and maximize practicality by allowing field (throughout a pavement's life cycle) sampling of thinner layers. The mixture itself is tested without the cumbersome and expensive solvent extraction routines. Further, the small-scale test allows much greater flexibility and resolution in laboratory accelerated aging to be explored in three different candidates: long-term oven aging, pressure aging vessel, and Weatherometer. The greater resolution in simulated aging provides more data points to emulate the lifetime of a pavement.
Laboratories:	Binder Laboratory Bituminous Mixtures Laboratory
Start Date:	September 1, 2009
End Date:	August 31, 2012
Funding Amount:	$425,000.00
FHWA Program Name:	Innovative Pavement Research and Deployment
Goals:	The key project objective is to develop laboratory test protocols for binders and mixtures with recommended criteria to quantify remaining crack resistant life.
Project Type:	Onsite
Background Information:	Data not yet available
Test Methodology:	Data not yet available
Other Information:	Data not yet available
Partners:	Data not yet available
More Information URL(s):
Fieldtest:	Data not yet available
Expected Benefits:	The expected benefit is reduced maintenance and rehabilitation costs from improved preservation.
Deliverables:	Name: Improved laboratory age conditioning (oxidation) of asphalt binder and mixtures. Product Type(s): Research report, Draft standard, specifications, or guidelines Description: Test protocol to measure the in situ aged fatigue life along with the mixture's binder properties to estimate the change in fatigue life relative to the original material properties and compute expected crack resistance life. Audiences: State highway agencies, Researchers Secondary Audiences:
Related URL(s):
Project Findings:	Data not yet available
FHWA Topics:	Roads and Bridges--Pavement and Materials Roads and Bridges--Asset Management Roads and Bridges--Design
TRT Terms:	Asphalt Aging (Materials) Fatigue Cracking Durability Infrastructure Pavements Research Preservation
FHWA Disciplines:	Pavement and Materials
Subject Areas:	Pavements Research Design