Modified Ignition Oven Test Procedure for Determination of Binder Content in Hot Asphalt Containing Dolomite Aggregate

Karol Kowalski , Rebecca McDaniel , Jan Olek , Ayesha Shah

Abstract

The binder content of hot mix asphalt (HMA) is most commonly determined either by solvent extraction or ignition oven (IO) methods. Generally, the IO method has worked well with various HMA mixtures except those containing certain types of high mass loss (decomposing) aggregates, especially dolomite. For these aggregates, the high temperatures experienced during the ignition process initiate chemical changes within the aggregate particles, which result in variable mass losses. This, in turn, causes difficulties in calculating a consistent correction factor and determining a repeatable binder content. This paper presents a modified TO binder content determination method, which involves lowering the test temperature to 427 degrees C and reducing the sample mass by half In addition, only the bottom material basket of the typical IO test setup is used to avoid errors in the results due to temperature differentials that develop when, upon ignition, mixture from the lower basket starts heating the mixture in the upper basket. The proposed method was successfully verified by using six different plant-produced mixtures
Author Karol Kowalski (FCE / IRB)
Karol Kowalski,,
- The Institute of Roads and Bridges
, Rebecca McDaniel - [North Central Superpave Center (NCSC)]
Rebecca McDaniel,,
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- North Central Superpave Center
, Jan Olek - [Purdue University (Purdue)]
Jan Olek,,
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- Purdue University
, Ayesha Shah - [North Central Superpave Center]
Ayesha Shah,,
-
-
Journal seriesJournal of Testing and Evaluation, ISSN 0090-3973, (A 20 pkt)
Issue year2011
Vol39
No6
Pages1060-1069
Publication size in sheets0.5
Keywords in Polishlepiszcze, asfalt
Keywords in Englishignition oven; hot mix asphalt; dolomite aggregate; binder content
ASJC Classification2210 Mechanical Engineering; 2211 Mechanics of Materials; 2500 General Materials Science
DOIDOI:10.1520/JTE103312
Languageen angielski
Score (nominal)20
Score sourcejournalList
Publication indicators Scopus Citations = 4; WoS Citations = 4; Scopus SNIP (Source Normalised Impact per Paper): 2011 = 0.753; WoS Impact Factor: 2011 = 0.349 (2) - 2011=0.333 (5)
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