Microstructure, geotechnical and mechanical characteristics of quicklime-lateritic gravels mixtures used in road construction

Younoussa Millogo, Jean Claude Morel, Karfa Traoré, Raguilnaba Ouedraogo

Research output: Contribution to journalArticle

18 Citations (Scopus)
46 Downloads (Pure)

Abstract

Microstructure of quicklime-lateritic gravels mixes, containing up to 8 wt.% quicklime, was investigated by using X-ray diffraction, infrared spectrometry, differential thermal analysis, scanning electron microscopy and energy dispersive spectrometry. Geotechnical and mechanical properties of the mixtures were also measured. Quicklime additions resulted of reduction of clayey fraction, plasticity index, methylene blue value and maximum dry density and the increasing of optimum moisture content. The results showed also that quicklime admixtures resulted in the formation of calcium silicate hydrate type I (C-S-H (I)), portlandite and calcite. This CSH (I) was formed through the pozzolanic reaction between a part of the kaolinite and hydrated lime in the basic medium. Moreover, C-S-H (I) marked crystallization with curing time and observed for the quicklime amounts (≤3 wt.%), contributed to the improvement of mechanical properties. These lime modified lateritic gravels are convenient for base course in road geotechnical applications.




Original languageEnglish
Pages (from-to)663-669
Number of pages7
JournalConstruction and Building Materials
Volume26
Issue number1
DOIs
Publication statusPublished - Jan 2012
Externally publishedYes

Bibliographical note

Publisher Statement: NOTICE: this is the author’s version of a work that was accepted for publication in Construction and Building Materials. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Construction and Building Materials, [26,1, (2012)] DOI: 10.1016/j.conbuildmat.2011.06.069



http://creativecommons.org/licenses/by-nc-nd/4.0/

Keywords

  • Base course
  • Burkina Faso
  • Geotechnical and mechanical properties
  • Lateritic gravels
  • Microstructure
  • Quicklime mixes

ASJC Scopus subject areas

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

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