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Title:

Effects of Binder and Mix Properties on the Evolution of Mechanistic Responses of the APT Sections

Accession Number:

01552276

Record Type:

Component

Availability:

Transportation Research Board Business Office

500 Fifth Street, NW
Washington, DC 20001 United States

Abstract:

One of the major benefits of the Accelerated Pavement Testing (APT) as a research tool is that the performance of pavement materials and structures can be evaluated at a reduced cost and in a short period of time. Six experimental sections were constructed in the Civil Infrastructure Systems Laboratory (CISL) at Kansas State University with six different Superpave mixes. The experimental sections were instrumented with strain gages, pressure cells, and displacement sensors to measure pavement responses under APT loading. They were loaded with a 22,000-lb single axle load at 95°F. The main objective of this paper is to investigate the effects of binder type, binder grade, and mixture nominal maximum aggregate size (NMAS) on the evolution of mechanistic responses from the experimental sections. Stress, strains, deflections, and profile data were collected periodically. The results show that the larger the NMAS, the lower the strains at the bottom of the hot mix asphalt (HMA) layers (longitudinal and transverse), Falling Weight Deflectometer (FWD) center deflection, rut depth, and roughness. Layers with larger NMAS also have higher back- calculated moduli. The stiffer the binder, the lower the FWD center deflection, permanent deformation, and rut depth but higher back-calculated moduli. Higher asphalt content results in higher FWD center deflection, permanent deformation, and rut depth. However, these sections show lower roughness and back-calculated moduli.

Supplemental Notes:

This paper was sponsored by TRB committee AFD40 Full-Scale Accelerated Pavement Testing.

Monograph Accession #:

01550057

Report/Paper Numbers:

15-4068

Language:

English

Corporate Authors:

Transportation Research Board

500 Fifth Street, NW
Washington, DC 20001 United States

Authors:

Gedafa, Daba S
Hossain, Mustaque
Romanoschi, Stefan A
Onyango, Mbaki A

Pagination:

17p

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:

Kansas State University

Geographic Terms:

Kansas

Subject Areas:

Design; Highways; Materials; Pavements; I22: Design of Pavements, Railways and Guideways; I31: Bituminous Binders and Materials; I36: Aggregates

Source Data:

Transportation Research Board Annual Meeting 2015 Paper #15-4068

Files:

TRIS, TRB, ATRI

Created Date:

Dec 30 2014 1:19PM