ASSESSMENT OF AGGREGATE SUITABILITY FOR USE IN ASPHALTIC CONCRETE USING METHYLENE BLUE ADSORPTION VALUE

Some recent occurrences of moisture damage and binder stripping of asphalt pavement in New South Wales have been attributed to the selection and use of aggregates which may be prone to this type of damage. In an attempt to improve asphalt performance, the methylene blue adsorption value (MBV) has been introduced to assist in the selection of suitable aggregates and minimise the risk associated with using suspect materials. In Australia, there has been only limited evaluation of the methylene blue adsorption value as a suitable test to identify the extent of reactive clay and ascertain the MBV level at which a potential problem may exist. This study presents the findings of an evaluation of the MBV to determine the presence of reactive clay in coarse and fine aggregates which may be one of the significant contributors to the cause of moisture damage in asphalt. Assessment of aggregates has been carried out, together with a detailed investigation of a single asphalt pavement project. The results of various aggregate tests, including MBV, clay content, etc, and tests on asphalt cores taken from the project pavement, are discussed together with some conclusions and recommendations. (a) For the covering entry of this conference, please see ITRD abstract no. E202467.

• Corporate Authors:

  Australian Asphalt Pavement Association

  Level 2, 5 Wellington Street
  Kew, Victoria  Australia  3101
• Authors:
  • Dumitru, I
  • CRABB, R
• Publication Date: 2000

Language

• English

Media Info

• Features: References;
• Pagination: 20-41 (SESSION 7B)
• Serial:
  • WORLD OF ASPHALT PAVEMENTS, INTERNATIONAL CONFERENCE, 1ST, 2000, SYDNEY, NEW SOUTH WALES, AUSTRALIA
  • Publisher: Australian Asphalt Pavement Association

Subject/Index Terms

• TRT Terms: Adsorption; Aggregates; Bituminous mixtures; Clay; Coarse aggregates; Conferences; Fines (Materials); Moisture content; Tests
• Uncontrolled Terms: Methylene blue test
• ITRD Terms: 7154: Adsorption; 4577: Aggregate; 4967: Bituminous mixture; 4177: Clay; 4559: Coarse aggregate; 8525: Conference; 9023: Fine (mater); 6250: Methylene blue test; 5920: Moisture content; 6255: Test
• Subject Areas: Data and Information Technology; Geotechnology;

Filing Info

• Accession Number: 00812676
• Record Type: Publication
• Source Agency: ARRB
• Files: ITRD, ATRI
• Created Date: Jul 2 2001 12:00AM