Better performing pavements: performance of modified and unmodified basecourse aggregates using repeat load triaxial test results

Current procedures do not give detailed information as to which modifying agent, and in what quantity, should be added to a basecourse aggregate to provide sufficient rutting resistance/performance. Hence, performance-orientated laboratory tests are required to determine the rutting performance of the traditional and modified aggregates. The Repeat Load Triaxial (RLT) test simulates dynamic pavement loading on basecourse materials similar to what is happening in the pavement structure. This paper reports on one aspect of an investigation conducted by Fulton Hogan, which was aimed at determining the influence of basecourse stabilization (lime and cement) on the performance of basecourse aggregates. The results demonstrated that the performance of a crushed aggregate that contains a small percentage of reactive clay can be substantially improved with the addition of a low percentage (in the order of 1 per cent) of cement. The testing regime used and results are discussed in the paper. The laboratory test results are also related to the performance of the modified and unmodified aggregates in service under trafficking. (a)

  • Authors:
    • Pidwerbesky, Bryan Dale
  • Publication Date: 2006-10


  • English

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Filing Info

  • Accession Number: 01054941
  • Record Type: Publication
  • Source Agency: ARRB
  • Files: ITRD, ATRI
  • Created Date: Aug 6 2007 2:05PM