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Title:

In Situ Measurement of Stiffness During the Construction of HMA Pavement

Accession Number:

01151185

Record Type:

Component

Availability:

Transportation Research Board Business Office

500 Fifth Street, NW
Washington, DC 20001 United States

Abstract:

The use of the Intelligent Asphalt Compaction Analyzer (IACA) to estimate the stiffness of an asphalt pavement during its construction is addressed in this paper. For a given asphalt mix, the ‘Master Curves’ for the dynamic modulus are first determined through the AASHTO TP62-03 (1) test procedure. These Master Curves are then used to calibrate the IACA to estimate the modulus of the pavement during its construction. The modulus at several locations on the compacted pavement was determined through Falling Weight Deflectometer (FWD) tests after the pavement has cooled down to ambient temperature. Comparison of the estimated and measured modulus at 21 degree Celsius shows that the IACA can be used as a quality control tool to during the construction of an asphalt pavement. Contrary to existing techniques in the literature the IACA uses a neural network and pattern-recognition techniques to estimate the stiffness. The neural network is designed to read in the entire frequency spectrum of the vibrations of the roller and classify these vibrations into different levels. The IACA is then calibrated to convert these levels of vibration into a modulus value representing the stiffness of the asphalt mat. This two step process produces stiffness measurements that are more accurate than those reported elsewhere in the literature. The IACA provides the measurement over the entire pavement and is non-destructive in nature. Further, the proposed method also allows for the easy verification of the estimated modulus through FWD tests on the completed pavement.

Monograph Accession #:

01147878

Report/Paper Numbers:

10-3533

Language:

English

Corporate Authors:

Transportation Research Board

500 Fifth Street, NW
Washington, DC 20001 United States

Authors:

Singh, Dharamveer
Mai, Anh
Beainy, Fares
Commuri, Sesh
Zaman, Musharraf

Pagination:

15p

Publication Date:

2010

Conference:

Transportation Research Board 89th Annual Meeting

Location: Washington DC, United States
Date: 2010-1-10 to 2010-1-14
Sponsors: Transportation Research Board

Media Type:

DVD

Features:

Figures (6) ; References (25) ; Tables (4)

Uncontrolled Terms:

Intelligent compaction

Subject Areas:

Construction; Highways; Pavements; I52: Construction of Pavements and Surfacings

Source Data:

Transportation Research Board Annual Meeting 2010 Paper #10-3533

Files:

TRIS, TRB

Created Date:

Jan 25 2010 11:47AM