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Title:

ANALYSIS OF MULTIVARIATE MODELS FOR EVALUATING SEGREGATION IN HOT-MIX ASPHALT PAVEMENTS

Accession Number:

00985969

Record Type:

Component

Availability:

Transportation Research Board Business Office

500 Fifth Street, NW
Washington, DC 20001 United States
Order URL: http://www.trb.org/Main/Public/Blurbs/155520.aspx

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Order URL: http://worldcat.org/isbn/0309094941

Abstract:

Multivariate statistical techniques were used to determine the feasibility of quantifying segregation in hot-mix asphalt pavements. Data obtained by using visual ratings of segregation, nuclear density gauge readings, and laboratory tests at nine field sites as reported by the National Center for Asphalt Technology were analyzed. Data were screened, before multivariate statistical analyses were performed, to develop relationships among segregation level, change in key mixture properties (air voids, asphalt content, and percent passing various sieves), and change in mixture density. The results revealed that segregation level could not be accurately identified by visual ratings and that multivariate statistics based on actual measured properties were appropriate for evaluating segregation level. Laboratory-prepared samples were made to assess the accuracy of the model developed in the study. The verification results indicated that the model could predict segregation level of these samples with accuracy. From the analysis of the models, it was concluded that a change in mixture density could predict segregation. This allows screening of segregated pavement sections on the basis of numerical field measurements instead of reliance on subjective visual observations. Given the promising results from this work, further studies on segregation models based on density measurements are suggested.

Supplemental Notes:

This paper appears in Transportation Research Record No. 1900, Construction 2004.

Monograph Title:

CONSTRUCTION 2004

Monograph Accession #:

00985965

Language:

English

Corporate Authors:

Transportation Research Board

500 Fifth Street, NW
Washington, DC 20001 United States

Authors:

Wu, J-X
Romero, P

Pagination:

p. 33-40

Publication Date:

2004

Serial:

Transportation Research Record

Issue Number: 1900
Publisher: Transportation Research Board
ISSN: 0361-1981

ISBN:

0309094941

Features:

Figures (2) ; References (12) ; Tables (12)

Subject Areas:

Construction; Data and Information Technology; Highways; I52: Construction of Pavements and Surfacings

Files:

TRIS, TRB, ATRI

Created Date:

Feb 17 2005 12:00AM

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