Domestic Scan Proposal Form

AASHTO is soliciting topic proposals for a Calendar Year 2013 US Domestic Scan Program (NCHRP Panel 20-68A). Each selected scan topic will be investigated through site visits to three to six locations for approximately a two week period or less (type 1), by webinar (type 2) or peer exchange (type 3) conducted by a group of eight to 12 transportation professionals with expertise in the selected topic area. Proposed topics should meet the following criteria:

·  Address an important and timely need for information by transportation agencies;

·  Are of interest to a broad national spectrum of people and agencies;

·  Are complex and also “hands-on,” meaning they lend themselves particularly well to exploration through on-site visits; and

·  Are sufficiently focused that the tour participants are able to investigate and understand key issues in the limited time available on the tour.

This form is designed to collect the full length of your proposal. Sections requiring essays have unlimited space for you to use. Contact information has some limited text. Use your TAB key to advance to the area where you need to complete information.

Proposals should be returned no later than OCTOBER 15, 2012.

Proposal Contact Information

Name / Georgene Geary / Address / 15 Kennedy Drive, Forest Park, GA 30297
Title / State Research Engineer / E-mail /
Member Department / Georgia DOT / Telephone number / 404-608-4712
AASHTO Committee / Susbommittee on Materials / Date of submission / 10/15/2012

Title of Proposed Scan

Domestic Technology Scan On Long-Life Concrete Pavements And Overlays

Problem Statement (What topic is to be examined? What drives the need for the scan? Why now?)

The topic of the proposed Scan is on Long-Life Concrete Pavements and Overlays. The Scan will examine both Continuously Reinforced Concrete Pavements and Plain Jointed Concrete Pavements as well as Concrete Overlays that have been built in the US and are exhibiting exceptional performance (>40 years). The Scan Team will identify the design, construction, material selection, maintenance approaches that have resulted in the exceptional performance.

State Transportation Authorities (STAs) face a growing crisus of insufficient funding to meet the needs of a deteriorating highway system. Part of the asset management planning which will reduce the ownership cost of pavements is to identify those strategies that will result in exceptonal performance. The need is extensive and Missouri is joined by the 24 member states of the National Concrete Consortium to support this proposal (AL , CA , CO , GA , IA , IL , IN , KS , LA , MI , MN , MO , NC , ND , NE , NY , OH , OK , PA , SD , TX , UT , WA , Wis.)

Background: In May of 2006, 15 members representing FHWA, AASHTO, academia, and the U.S. concrete pavement industry participated in an international scan to identify promising technologies that may be applicable in the U.S. for increasing the performance and cost effectiveness of concrete pavements. The scan was very beneficial and a number of promising initiatives were identified as detailed in the Scan Technology Implementation Plan (STIP). With the increasing emphasis on identifying approaches to designing, constructing, and maintaining concrete pavements that will provide very long life performance, perhaps 100 years, it is proposed that a domestic scan also be initiated to build upon the international scan and identify those practices that will consistently enable STAs to incorporate into their systems those facilities that will double or triple the current performance life of concrete pavements.

FHWA and STAs are challenged by the following needs that this study will help address:

• Pavement solutions that will result in reduced ownership costs

• Need to provide roadways with reduced operational impacts to the public

• Sustainability including reduced environmental, social, and economic impacts

Scan Scope (What specific subject areas are to be examined? Which cities and states might be visited? Which agencies/organizations (including specific departments or types of staff if applicable)?

Recommended Scan Topics

• Material properties and concrete mix design requirements: This should include experience with recycled aggregates and the use of supplemental cementitious materials (SCMs).

• Pavement design and specifications: In addition to the performance requirements of the pavement, foundation and drainage components need to be identified so the performance of the entire pavement system is understood.

• Construction requirements: This should include construction procedures, placement conditions, acceptance criteria, surface characteristics, and ride requirements.

• Performance experience: Winter maintenance practices, routine and unanticipated repairs, and pavement management history including ride and service life analysis would be examined.

• Sustainability: Identify practices used during the original construction and current approaches with specific emphasis on aggregates, cement and SCMs.

• Composite systems: Experience with concrete overlays to extend the performance life of concrete pavements as either a maintenance or staged construction strategy.

Potential sites include California, Illinois, Louisiana, New York, Michigan, Minnesota, Ohio, and Texas. Other possible sites will be named later as part of the SCAN development.

Recommended Scan Members

FHWA (Office of Pavement Technology, Resource Center, Division Office)

STA (Asset Management, Design, Material, Maintenance, Construction, Geotechnical, and Research)

Industry (American Concrete Pavement Association, Concrete Steel Reinforcng Institute, Portland Cement Association, contractors, and cement manufacturers)

Academia (National Concrete Pavement Technology Center at Iowa State University)

It is recommended that, at a minimum, several representatives from the international scan also participate in the domestic scan to provide synergy between the efforts.

Anticipated Scan Results (What key information is to be gained? What information is to be shared after the scan? Who would the audience be for this information?)

The objectives include: identify design philosophies, materials requirements, construction procedures and maintenance strategies, including winter maintenance strategies for constructing and operating concrete pavements with performance lives in the 50 to 100 year range.

Benefits Expected (Including potential impacts on current technology or procedures)

Being able to consistently build very long life concrete pavements and concrete overlays would result in numerous benefits including:

• Very attractive life cycle ownership costs.

• Minimal traffic disruption over the life of the facility.

• Greater operational safety to the traveling public.

• Sustainability benefits including conservation of resources, reduced environmental impacts, and reduction in overall societal impacts.

• Improved design, construction, and maintenance procedures to meet public expectations.