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Title:

USE OF ASTM TESTS TO PREDICT LOW-TEMPERATURE STIFFNESS OF ASPHALT MIXES

Accession Number:

00128540

Record Type:

Component

Availability:

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Order URL: http://worldcat.org/isbn/0309023998

Abstract:

This investigation tested the reliability of ASTM tests to predict low-temperature stiffness of mixes made with a wide variety of asphalts. Mix stiffnesses obtained from creep tests performed with a new low-cost non-destructive method on ordinary Marshall or Hveem specimens were compared with ASTM stiffnesses. The relationship reported between thermally induced pavement cracking and Tl or the temperature at which the 10,000-sec asphalt stiffness is 20,000 psi (138 000 5Pa) is qualitatively supported by field tests. Tl estimated from ASTM penetration at 39.2 F (4 C), along with the ASTM penetration at 77 F (25 C) or the viscosity at 140 F (60 C) on rolling thin film (RTF-C) oven residua, correlates well with the measured Tl. The use of penetration at 39.2 F (4 C) is supported as a specification requirement. Good correlation was also found on asphalts recovered from the mixes. Tl correlated poorly with penetration at 77 F along with softening point or viscosity at 140 F on both RTF-C and recovered residua. Tl estimated from viscosities at 140 F, along with viscosities at 275 F on RTF-C or recovered residua, show no correlation with measured Tl. Resistance to low-temperature thermally induced cracking should not be implied on diverse types of asphalts from high-temperature viscosity measurments. Ductilities at 45 F show no correlation with L. A modified asphalt test data chart that permits the low-temperature stiffness of asphalts to be determined from normal ASTM penetration tests is given.

Supplemental Notes:

Publication of this paper sponsored by Committee on Characteristics of Bituminous Materials. 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 #:

01411405

Authors:

Schmidt, R J

Discussers:

Davis, Richard L

Pagination:

pp 35-45

Publication Date:

1975

Serial:

Transportation Research Record

Issue Number: 544
Publisher: Transportation Research Board
ISSN: 0361-1981

Conference:

54th Annual Meeting of the Transportation Research Board

Location: Washington District of Columbia
Date: 1975-1-13 to 1975-1-17

ISBN:

0309023998

Media Type:

Print

Features:

Figures (10) ; References (24) ; Tables (2)

Uncontrolled Terms:

Thin film oven test

Subject Areas:

Highways; Materials

Files:

TRIS, TRB

Created Date:

May 14 1976 12:00AM

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