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Title:

TRIAXIAL SHEAR STRENGTH CHARACTERISTICS OF SOME SAND-ASPHALT MIXTURES

Accession Number:

00230528

Record Type:

Component

Abstract:

THIS INVESTIGATION, WHICH AROSE FROM A CONSIDERED NEED FOR MORE WORK OF A FUNDAMENTAL NATURE IN ASPHALT STABILIZATION, DETERMINED STRENGTH RELATIONSHIPS OF CUTBACK ASPHALT, EMULSIFIED ASPHALT, ASPHALT, HOT-MIX AND FOAMED ASPHALT MIXTURES BY TRIAXIAL COMPRESSION TESTING OF CURED AND WATER- IMMERSED SPECIMENS. THE RESULTS SHOW THAT FOR THE FINE, UNIFORM AND ROUNDED QUARTZ SANDS USED /99 PERCENT PASSING NO. 40 SIEVE WITH A UNIFORMITY COEFFICIENT OF APPROXIMATELY 2.00/, THE FOAMED ASPHALT PROCESS RESULTS IN SUPERIOR SHEAR STRENGTHS OF CURED SPECIMENS, COMPARED TO THE OTHER PROCESSES. HOWEVER, IMMERSION CAUSES A CONSIDERABLE LOSS IN COHESION RESULTING IN STRENGTHS SIMILAR TO THOSE OF IMMERSED CUTBACK OR EMULSIFIED ASPHALT SPECIMENS, ALTHOUGH ALTERNATE CYCLES OF CURING AND IMMERSION DO NOT SIGNIFICANTLY AFFECT THE FINAL CURED SHEAR STRENGTHS OF FOAMED ASPHALT SPECIMENS. IT IS ALSO SHOWN THAT AT THE SAME ESTIMATED BITUMINOUS FILM THICKNESS, THE ADDITION OF A LIMITED AMOUNT OF FINES PASSING A NO. 50 SIEVE SIZE RESULTS IN INCREASED CURED COHESIVE STRENGTHS. IT IS POSTULATED THAT THE HIGHER STRENGTHS OF THE CURED FOAMED ASPHALT MIXTURES ARE DUE PRIMARILY TO APPARENT COHESION RESULTING FROM SURFACE TENSION FORCES IN THE WATER PHASE, THE MAGNITUDE OF WHICH IS RELATED TO THE UNIFORMITY AND THICKNESS OF ASPHALT FILMS COATING INDIVIDUAL SAND PARTICLES. /AUTHOR/

Supplemental Notes:

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 #:

01055569

Language:

English

Authors:

Anderson, K O
Hass, R C
Laplante, A D

Pagination:

pp 1-12

Publication Date:

1965

Serial:

Highway Research Record

Issue Number: 91
Publisher: Highway Research Board

Media Type:

Digital/other

Features:

Figures (3) ; References (29) ; Tables (4)

Uncontrolled Terms:

Film thickness

Old TRIS Terms:

Subject Areas:

Geotechnology; Highways

Files:

TRIS, TRB

Created Date:

Aug 15 2004 2:40AM

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