Material-specific effects of hydrated lime on the properties and performance behavior of asphalt mixtures and asphaltic pavements

Francisco Thiago Sacramento Aragão, Junghun Lee, Yong Rak Kim, Pravat Karki

Research output: Contribution to journalArticle

22 Scopus citations

Abstract

This study evaluates hydrated lime-treated hot-mix asphalt (HMA) mixtures through various laboratory tests, including the dynamic modulus test and performance tests to characterize permanent deformation and fatigue damage resistance both in displacement-controlled and force-controlled modes. Two different asphalt mixtures - the asphalt concrete mixture and the fine aggregate asphalt matrix mixture - which differ only in the amount of additional hydrated lime (0.5-3.0%), are tested. Test results demonstrate material-specific damage characteristics of hydrated lime and the existence of a more appropriate amount of hydrated lime to be added to the HMA mixtures than the current typical application rate such as the addition of 1.0% lime to dry or pre-moistened aggregates. In addition, the newly released Mechanistic-Empirical Pavement Design Guide (MEPDG) is used for predicting pavement performance related to hydrated lime content. The MEPDG analysis results show that damage prediction models implemented in the current MEPDG are limited to accurately predicting material-specific damage characteristics. Mechanistic models that consider material-specific crack phenomenon and fracture behavior should be pursued.

Original languageEnglish (US)
Pages (from-to)538-544
Number of pages7
JournalConstruction and Building Materials
Volume24
Issue number4
DOIs
StatePublished - Apr 1 2010

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Keywords

  • Hot-mix asphalt
  • Hydrated lime
  • Mechanistic-Empirical Pavement Design Guide
  • Pavement performance

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction
  • Materials Science(all)

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