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Title:

Variability Analysis of Low Volume Instrumented Thin Flexible Pavements

Accession Number:

01090784

Record Type:

Component

Availability:

Transportation Research Board Business Office

500 Fifth Street, NW
Washington, DC 20001 United States

Abstract:

Variability analysis is presented for asphalt strain, crushed stone pressure, and clay subgrade pressure data acquired from a low volume, thin flexible pavement field test performed in northeast Arkansas. The pavement was heavily instrumented and received uncharacteristically low amounts of rainfall for several months thereafter. The large amount of data acquired under these relatively constant moisture conditions served as an excellent tool to analyze the variability of full scale test data, especially in the context of measurement redundancy and appropriate analysis techniques. Three numerical analysis methods were used to assess construction variability: variability envelopes were + 30% for asphalt strain, + 21% for crushed stone pressure, and + 30% for clay subgrade pressure. An additional numerical analysis was performed in conjunction with a review of the literature to assess measurement variability: variability envelopes were + 35% for asphalt strain, + 23% for crushed stone pressure, and + 23% for clay subgrade pressure. A statistical analysis of the data set clearly showed that sensor redundancy (without a variability analysis) can lead to erroneous conclusions. The incorporation of measurement and construction variability into the analysis successfully addressed the erroneous results. The approach described in this paper can be used to plan instrumented test programs efficiently in the future.

Monograph Accession #:

01084478

Report/Paper Numbers:

08-1592

Language:

English

Corporate Authors:

Transportation Research Board

500 Fifth Street, NW
Washington, DC 20001 United States

Authors:

Howard, Isaac L
Warren, Kimberly A
Eamon, Christopher
Lord, Charles Randolph

Pagination:

16p

Publication Date:

2008

Conference:

Transportation Research Board 87th Annual Meeting

Location: Washington DC, United States
Date: 2008-1-13 to 2008-1-17
Sponsors: Transportation Research Board

Media Type:

DVD

Features:

Figures (5) ; References (18) ; Tables (4)

Geographic Terms:

Arkansas

Subject Areas:

Data and Information Technology; Design; Highways; Pavements; I22: Design of Pavements, Railways and Guideways; I23: Properties of Road Surfaces

Source Data:

Transportation Research Board Annual Meeting 2008 Paper #08-1592

Files:

TRIS, TRB

Created Date:

Jan 29 2008 3:55PM