00624904

Component

http://onlinepubs.trb.org...trr/1992/1337/1337-001.pdf

https://scholar.google.co...West&publication_year=1992

For some asphalt concrete mixes in Alabama, correlations between field stripping performance and stripping test predictions have been poor. One of the possible causes of this inconsistency appears to be the inability of the laboratory stripping tests to simulate field conditions, particularly the drying of aggregates before mixing with asphalt cement. In the field, highly absorptive saturated aggregates may not be effectively dried by rapid heating in drum dryers. Laboratory preparation of test samples, however, begins with well-dried aggregates. Moisture content measurements of hot bin aggregates and freshly mixed hot asphalt concrete occasionally confirm the presence of residual moisture at levels that are likely to have an effect on the moisture damage susceptibility of the mix. The amount of moisture retained in plant-produced mix is highly dependent on ambient temperature and the moisture content of aggregate stockpiles. Wet-dry indirect tensile stripping tests indicate that the effect that residual moisture has on tensile strength depends on aggregate type. On the basis of tensile strength ratios of conditioned specimens to unconditioned specimens, residual moisture can be detrimental to mixes containing primarily siliceous aggregate. However, mixes containing limestone as the dominant aggregate did not appear to be adversely affected by residual aggregate moisture.

This paper appears in Transportation Research Record No. 1337, Flexible Pavement Construction, Performance, and Recycling. 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

01404957

English

p. 1-9

1992

Transportation Research Record

0309052017

Figures (8) ; References (11) ; Tables (2)

Aggregates; Asphalt concrete; Hot mix asphalt; Limestone aggregates; Moisture content; Plant mix; Silica stone; Stockpiling; Stripping (Pavements); Temperature; Tensile strength; Tension tests

Indirect tensile test; Siliceous aggregates

Geotechnology; Highways; Materials; I31: Bituminous Binders and Materials; I36: Aggregates

TRIS, TRB, ATRI

Sep 10 1993 12:00AM

• ASPHALT TECHNOLOGY FOR HOT IN-PLACE SURFACE RECYCLING
• CASE HISTORIES OF COLD IN-PLACE RECYCLED ASPHALT PAVEMENTS IN CENTRAL OREGON
• CASE STUDY OF A FULL-DEPTH ASPHALT CONCRETE INLAY
• CONSTRUCTION OF RUT-RESISTANT ASPHALT MIXTURES
• FIELD PERFORMANCE OF LARGE-STONE HOT MIX ASPHALT ON A KENTUCKY COAL HAUL ROAD
• INVESTIGATION OF AIRFIELD RUNWAYS AT JACKSONVILLE NAVAL AIR STATION
• LONG-LIFE WESTERN AUSTRALIAN SEAL COAT
• PERFORMANCE OF COLD IN-PLACE RECYCLING IN ONTARIO
• REUSE OF MOISTURE-DAMAGED ASPHALTIC CONCRETE PAVEMENTS