00646000

Component

http://onlinepubs.trb.org...trr/1993/1418/1418-003.pdf

https://scholar.google.co...hara&publication_year=1993

The Alabama Highway Department does not permit the use of limestone coarse aggregate in asphalt wearing courses because of potential long-term skid resistance problems. A laboratory study was undertaken to evaluate 32 sources of limestone aggregates in Alabama for possible use in the wearing courses. Twelve approved sources of gravel aggregate were also evaluated for comparison. The frictional properties of all aggregates were determined using the British pendulum tester (ASTM E303) after 9 hr of accelerated polishing on the British wheel (ASTM D3319). Aggregates were also subjected to petrographic analysis. The percentage of noncarbonate material in limestone aggregates was determined by two methods: percent insoluble residue (ASTM D3042) and percent loss on ignition (Tennessee DOT method). The British pendulum number (BPN) values were found to follow a hyperbolic relationship with polishing time. This relationship can possibly be used to predict the limiting BPN value after infinite polish time. There was a general trend that the value of BPN9 (BPN value after 9 hr of polishing) increased as the percentage of insoluble residue increased or the percentage loss by ignition decreased. On the basis of BPN9 values, limestone aggregates were divided into three categories: potentially low, medium, and high skid-resistance levels. If BPN9 is used as an acceptance criterion, the limestone aggregates of the medium and high categories have the potential to provide skid resistance levels comparable with gravel aggregates used at the present time.

This paper appears in Transportation Research Record No. 1418, Performance-Related Testing and Evaluation of Characteristics of Aggregates and New Geomaterials. 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

01398731

English

p. 12-21

1993

Transportation Research Record

0309055660

Figures (6) ; References (24) ; Tables (6)

Friction; Geological surveying; Laboratory tests; Limestone aggregates; Pendulum tests; Petrography; Polished aggregates; Skid resistance; Wearing course (Pavements)

Alabama

Alabama

Geotechnology; Highways; I36: Aggregates

TRIS, TRB

Apr 4 1994 12:00AM

• AGGREGATE TYPE AND TRAFFIC VOLUME AS CONTROLLING FACTORS IN BITUMINOUS PAVEMENT FRICTION
• COMPARISON OF SOME ENGINEERING PROPERTIES OF EXPANDED POLYSTYRENE WITH THOSE OF SOILS (WITH DISCUSSION AND CLOSURE)
• EVALUATION OF DOMESTIC INCINERATOR ASH FOR USE AS AGGREGATE IN ASPHALT CONCRETE
• EXPERIENCE WITH ASTM P214 IN TESTING VIRGINIA AGGREGATES FOR ALKALI-SILICA REACTIVITY
• MINERALOGY OF AGGREGATES IN RELATION TO THE FRICTIONAL PERFORMANCE OF SEAL COAT PAVEMENT OVERLAYS: A PETROGRAPHIC STUDY
• RESILIENT AND PLASTIC BEHAVIOR OF CLASSIFIER TAILINGS AND FLY ASH MIXTURES
• STRENGTH AND LIFE OF STABILIZED PAVEMENT LAYERS CONTAINING FIBRILLATED POLYPROPYLENE
• TEST DEVICE FOR EVALUATING RUTTING OF ASPHALT CONCRETE MIXES