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Title:

Performance Specification for Sealed Unbound Granular Pavement Design and Construction: Twelve-Year Case Study

Accession Number:

01551004

Record Type:

Component

Availability:

Transportation Research Board Business Office

500 Fifth Street, NW
Washington, DC 20001 United States

Abstract:

Increasingly constrained road construction and maintenance budgets provide the ideal opportunity for technical innovations to challenge existing paradigms and provide even greater value for road agencies. As an example, New Zealand’s specifications for pavement materials tend to be recipe based and are designed to produce premium aggregates for unbound granular pavement construction; however, these specifications are not always ‘fit for purpose’. This paper describes a case study of a specification that was developed to produce a ‘fit for purpose’ pavement that reduced costs without compromising performance and conserved huge volumes of aggregate. The performance based specification for design and construction of thin-surfaced flexible unbound granular pavements was developed in collaboration with Transit (now New Zealand Transport Agency) to foster the use of marginal, non-conforming aggregates that give similar performance to premium base course materials. Another objective was to preserve prime quality aggregates. A project completed under this specification in 2002 was described in detail in a paper at the 2004 Transportation Research Board (TRB) Annual Meeting, and this paper is an update on the earlier paper, including twelve years of actual performance monitoring data which demonstrate the benefits of the innovation that should be adopted on a wider scale. Collaboration was the key to taking advantage of existing research and technical capability in order to provide value for money without unduly compromising levels of service.

Supplemental Notes:

This paper was sponsored by TRB committee AFD60 Flexible Pavement Design. Alternate title: Performance Specification for Sealed Unbound Granular Pavement Design and Construction: A Twelve-Year Case Study.

Monograph Accession #:

01550057

Report/Paper Numbers:

15-2065

Language:

English

Corporate Authors:

Transportation Research Board

500 Fifth Street, NW
Washington, DC 20001 United States

Authors:

Pidwerbesky, Bryan
Alabaster, David

Pagination:

13p

Publication Date:

2015

Conference:

Transportation Research Board 94th Annual Meeting

Location: Washington DC, United States
Date: 2015-1-11 to 2015-1-15
Sponsors: Transportation Research Board

Media Type:

Digital/other

Features:

Figures; References; Tables

Identifier Terms:

New Zealand Transport Agency

Geographic Terms:

New Zealand

Subject Areas:

Design; Highways; Pavements; I22: Design of Pavements, Railways and Guideways

Source Data:

Transportation Research Board Annual Meeting 2015 Paper #15-2065

Files:

TRIS, TRB, ATRI

Created Date:

Dec 30 2014 12:44PM