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Title:

STORAGE OF BITUMINOUS CONCRETE IN INERT GAS

Accession Number:

00211882

Record Type:

Component

Availability:

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Order URL: http://worldcat.org/isbn/0309022541

Abstract:

POSSIBLE PROBLEMS ASSOCIATED WITH HOT STORAGE OF BITUMINOUS CONCRETE MIXES CAN BE MIGRATION OF ASPHALT, SEGREGATION OF THE MIX, AND AGING OF THE ASPHALT CEMENT DUE TO PROLONGED STORAGE AT HIGH TEMPERATURE. LABORATORY AND FIELD INVESTIGATIONS WERE CONDUCTED TO EVALUATE THE EFFECT OF PROLONGED HOT STORAGE ON THE PROPERTIES OF A BITUMINOUS PAVING MIX. NO ADDITIVE WAS USED IN THE ASPHALT CEMENT. STORAGE OF MIXES WAS ATTEMPTED WITH AND WITHOUT INERT GAS FOR AS LONG AS 10 DAYS. FIELD TESTS WERE CONDUCTED WITH INERT GAS ONLY TO EXTEND THE STORAGE PERIOD. MIGRATION OF OF ASPHALT AND SEGREGATION OF MIX DID NOT POSE ANY PROBLEM. IN THE PILOT TESTS, MIX STORED WITHOUT INERT GAS HARDENED AT A FASTER RATE THAN THAT STORED WITH AN INERT ATMOSPHERE. IF THE MAXIMUM ALLOWABLE STORAGE TIME IS DETERMINED FROM THE CRITERION OF MINIMUM PERCENTAGE OF RETAINED PENETRATION (AASHO M 20-70) ON TFOT RESIDUE, THIS CAN VARY DEPENDING ON THE ASPHALT SOURCE, COMPOSITION OF THE BITUMINOUS MIX, TEMPERATURE, AND TIME OF MIXING. NO STORAGE MIGHT BE POSSIBLE IN SOME CASES; HOWEVER, BASED ON THESE CRITERIA, THE ALLOWABLE STORAGE PERIOD USING INERT GAS WAS FOUND TO BE 24 HOURS IN THIS FIELD STUDY. IT IS YET TO BE ESTABLISHED TO WHAT EXTENT THE DURABILITY OF THE PAVEMENT IS SACRIFICED BECAUSE OF PREMATURE HARDENING OF THE ASPHALT IN THE HOT STORAGE BIN.

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 #:

01413896

Authors:

Kandhal, Prithvi S
Wenger, Monroe E

Discussers:

Davis, R L

Pagination:

pp 61-72

Publication Date:

1973

Serial:

Highway Research Record

Issue Number: 468
Publisher: Highway Research Board

ISBN:

0309022541

Media Type:

Print

Features:

Figures (9) ; References (15) ; Tables (2)

Uncontrolled Terms:

Segregation

Old TRIS Terms:

Subject Areas:

Highways; Materials; Terminals and Facilities

Files:

TRIS, TRB

Created Date:

May 7 1974 12:00AM

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