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Title:

Characterization of Mix Permanent Shear Strain Accumulation Process Using Three-Stage Weibull Approach

Accession Number:

01089631

Record Type:

Component

Availability:

Transportation Research Board Business Office

500 Fifth Street, NW
Washington, DC 20001 United States

Abstract:

This paper presents the three-stage Weibull model approach for characterization of the permanent shear strain (PSS) accumulation process of a controlled-load repeated simple shear test at constant height (RSST-CH). The primary intent of this research is to determine the most appropriate factors that describe rutting performance through the study of Weibull parameters and as a result of this, determine the relative performance of the mixes tested. A total of 177 RSST-CH tests conducted under various testing conditions and material properties were utilized in this analysis. The mix types included, conventional dense-graded asphalt concrete with AR4000 binder (AR4000-D), Rubberized Asphalt concrete with gap gradation (RAC-G), and dense- and gap-graded mixes with MAC15, MB15, and MB4 polymer and rubber-modified binders. A three-stage shear Weibull curve can characterize the shape of versus, where n is the number of load repetitions. Each RSST-CH test was fit with a three-stage Weibull curve that was completed with genetic algorithm. Then, three-stage Weibull parameters for all the tests were collected, summarized, and analyzed. Summary boxplots and tree-based regression/category modeling were utilized to determine the relationships of Weibull parameters associated with the testing variables. The most promising parameters to identify rutting performance were found to be the intercepts divided by slopes of a Weibull curve at stages II and III respectively. The three-stage Weibull procedure is very promising method of analysis, especially from the standpoint of mixes that never reach the conventional criterion for RSST-CH testing to 5 percent permanent shear strain.

Monograph Accession #:

01084478

Report/Paper Numbers:

08-2569

Language:

English

Corporate Authors:

Transportation Research Board

500 Fifth Street, NW
Washington, DC 20001 United States

Authors:

Tsai, Bor-Wen
Signore, James M
Guada, Irwin M
Harvey, John T
Monismith, Carl L

Pagination:

24p

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 (8) ; References (3) ; Tables (2)

Subject Areas:

Highways; Materials; I31: Bituminous Binders and Materials

Source Data:

Transportation Research Board Annual Meeting 2008 Paper #08-2569

Files:

TRIS, TRB

Created Date:

Jan 29 2008 4:59PM