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Title:

COMPARISON OF FOUR DIFFERENT METHODS FOR MEASURING DEFLECTIONS IN JOINTED REINFORCED CONCRETE PAVEMENTS

Accession Number:

00637672

Record Type:

Component

Availability:

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Order URL: http://worldcat.org/isbn/0309054575

Abstract:

A total of 107 dynamic deflection tests on a jointed reinforced concrete pavement were conducted to compare the performance of four measuring instruments: the linear voltage displacement transducer (LVDT), the geophone, the falling weight deflectometer (FWD), and the Dynaflect. The deflections were measured at six joints of the test pavement in the southbound roadway on Route 23 in Chillicothe, Ohio. The deflections measured by LVDT and geophone were produced by the axle loads of a fully loaded two-axle truck. Thus, this test program allowed the comparison of not only the performance of the four types of instruments, but also the deflections caused by "real-life" truck loading with those caused by "artificial" FWD and Dynaflect test loadings. Furthermore, the deflection measurements at the joints due to truck load were compared at four different speeds: static (0 mph or 0 km/hr) and moving at 10, 35, and 50 mph (16, 56, and 80 km/hr). Another important aim of this test program was to determine whether the geophone measurements were reliable and how truck speeds affected them. It was found that the LVDT and geophone deflection measurements agreed well, provided that the truck speed was equal to or exceeded 35 mph (56 km/hr). Also, the static deflection test results closely agreed with those from the moving load tests. Furthermore, it was found that the normalized FWD test results yielded the highest deflections, approximately 13% higher than the deflections caused by the moving truck. On the other hand, the results from the normalized Dynaflect tests agreed well with the deflections caused by the moving truck.

Supplemental Notes:

This paper appears in Transportation Research Record No. 1388, Rigid and Flexible Pavement Design and Rehabilitation. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved

Monograph Accession #:

01403222

Language:

English

Authors:

Bodocsi, Andrew
Minkarah, Issam A
Young, Charles S
Miller, Richard A
Arudi, Rajagopal S

Pagination:

p. 29-34

Publication Date:

1993

Serial:

Transportation Research Record

Issue Number: 1388
Publisher: Transportation Research Board
ISSN: 0361-1981

ISBN:

0309054575

Features:

Figures (4) ; References (10) ; Tables (4)

Old TRIS Terms:

Subject Areas:

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

Files:

TRIS, TRB, ATRI

Created Date:

Sep 28 1993 12:00AM

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