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Title:

LABORATORY DENSITY MEASUREMENTS OF BITUMINOUS MIXES BY GAMMA-RAY PROBE

Accession Number:

00625401

Record Type:

Component

Availability:

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Order URL: http://worldcat.org/isbn/0309052173

Abstract:

An experimental study that evaluated the feasibility of applying a twin-probe gamma-ray gauge for density measurements of cylindrical bituminous specimens is described. Major considerations related to the operational features of the gauge and the characteristics of the composite structure of bituminous mixtures are highlighted. Three bituminous mix types--namely, sand asphalt, dense-graded mix, and open-graded mix--were included. The measurement precision and accuracy characteristics of the gauge with respect to the different mix types were examined. It was found that the precision and accuracy of gauge-determined densities varied with the types of mix tested. Better precision and accuracy were achieved with specimens that had more uniform density distribution within the mass and with specimens that were less porous. Recommendations concerning the use of gamma-ray probes for laboratory density measurements of bituminous paving mixtures are made. An illustration showing the ability of the twin-probe gauge to determine the density profile of a tall specimen is presented.

Supplemental Notes:

This paper appears in Transportation Research Record No. 1353, Asphalt Mixture Design. 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 Title:

Asphalt mixture design

Monograph Accession #:

01405031

Language:

English

Authors:

Fwa, T F
Tan, S A

Pagination:

p. 1-8

Publication Date:

1992

Serial:

Transportation Research Record

Issue Number: 1353
Publisher: Transportation Research Board
ISSN: 0361-1981

ISBN:

0309052173

Features:

Figures (10) ; References (7) ; Tables (3)

Uncontrolled Terms:

Dense graded mixes

Old TRIS Terms:

Subject Areas:

Highways; Materials; Research; I31: Bituminous Binders and Materials

Files:

TRIS, TRB, ATRI

Created Date:

Nov 25 1993 12:00AM

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