The influence of weathering on the engineering properties of dunites

Ömer Ündül*, Atiye Tuǧrul

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

45 Citations (Scopus)


Weathering processes cause important changes in the engineering properties of rocks. In this study, dunites in the Bursa region in western Turkey were investigated and the changes in engineering properties due to weathering were evaluated. The studies were initiated with field observations including measurement of the characteristics of discontinuities such as spacing, aperture, fill material, roughness, and Schmidt hammer rebound value. Subsequently, laboratory studies were conducted in two stages. The first stage comprised mineralogical, petrographic, and chemical analyses. The second stage included physicomechanical tests to determine specific gravity, unit weights, water absorption, effective porosity, uniaxial compressive strength, P-wave velocity, and slake-durability index. According to these evaluations, the changes in engineering properties were determined to be mostly related to serpentinization at every stage of weathering. The most suitable parameters for characterizing the degree of weathering of the studied dunites are loss-on-ignition values, specific gravity, unit weight, water absorption, and effective porosity.

Original languageEnglish
Pages (from-to)225-239
Number of pages15
JournalRock Mechanics and Rock Engineering
Issue number2
Publication statusPublished - Mar 2012
Externally publishedYes


This study was supported by the Research Fund of Istanbul University, project number: T-394/08032004.

FundersFunder number
Istanbul ÜniversitesiT-394/08032004


    • Dunite
    • Engineering properties
    • Rock composition
    • Weathering


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