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Title:

FIELD AND LABORATORY DETERMINATION OF ELASTIC PROPERTIES OF PORTLAND CEMENT CONCRETE USING SEISMIC TECHNIQUES

Accession Number:

00625546

Record Type:

Component

Availability:

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Order URL: http://worldcat.org/isbn/030905219X

Abstract:

Seismic techniques, including the Spectral-Analysis-of-Surface-Waves test, direct and interval compression wave tests, and resonance tests, provide reliable techniques for determining the elastic properties of portland cement concrete (PCC). These techniques can be applied to pavement structures, such as slabs, and to laboratory specimens, such as cylinders. The nondestructive nature of these tests makes them ideal for monitoring PCC from the earliest stages of curing and continuing throughout the life of the structure. Elastic properties, typically expressed as Young's modulus and shear modulus, provide an easy way to compare the similarity of laboratory specimens with each other and with the structures they are intended to represent. The results of different seismic tests on curing slabs and field-curing cylinders demonstrate the applicability of the tests and show that, in these tests, the field-cured cylinders did not obtain the stiffnesses of the slabs. Small-strain static tests performed on cylinders are also shown to be consistent with moduli determined by dynamic (seismic) tests on the same cylinders when both types of tests are performed at similar strain levels. However, these small-strain moduli are shown to be about 10% greater than Young's moduli measured in conventional static tests at 40% of the unconfined strength, because of the decrease in modulus with increasing strain.

Supplemental Notes:

This paper appears in Transportation Research Record No. 1355, Nondestructive Structural Evaluation of Pavements. 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 #:

01405034

Language:

English

Authors:

Bay, J A
Stokoe II, K H

Pagination:

p. 67-74

Publication Date:

1992

Serial:

Transportation Research Record

Issue Number: 1355
Publisher: Transportation Research Board
ISSN: 0361-1981

ISBN:

030905219X

Features:

Figures (10) ; References (10) ; Tables (2)

Uncontrolled Terms:

Cylinders; Seismic tests; Strain rate

Subject Areas:

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

Files:

TRIS, TRB

Created Date:

Dec 16 1993 12:00AM

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