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    Fatigue cracking behaviours on Cement Treated Crushed Rock

    190728_76143_72887.pdf (407.0Kb)
    Access Status
    Open access
    Authors
    Siripun, Komsun
    Jitsangiam, Peerapong
    Nikraz, Hamid
    Leek, Colin
    Date
    2012
    Type
    Conference Paper
    
    Metadata
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    Citation
    Siripun, Komsun and Jitsangiam, Peerapong and Nikraz, Hamid and Leek, Colin. 2012. Fatigue cracking behaviours on Cement Treated Crushed Rock, in the proceedings of the ISAP 2012 International Symposium on Heavy Duty Asphalt Pavements and Bridge Deck Pavements, May 23-25 2012. Nanjing, China: International Society for Asphalt Pavements (ISAP).
    Source Title
    Proceedings of the ISAP 2012 International Symposium on Heavy Duty Asphalt Pavements and Bridge Deck Pavements
    Source Conference
    The ISAP 2012 International Symposium on Heavy Duty Asphalt Pavements and Bridge Deck Pavements
    Additional URLs
    http://asphalt.org/publications/conference-proceedings
    URI
    http://hdl.handle.net/20.500.11937/40846
    Collection
    • Curtin Research Publications
    Abstract

    Fatigue cracking is considered to be one of the most important types of distress affecting the performance of flexible pavements on major highways. This report analyses the results of a laboratory study of the static and fatigue response of a typical Western Australia cement treated base (CTB) to evaluates its mechanical parameters i.e. flexural strength, flexural stiffness and tensile strains. Five different series of cement content were evaluated in the mix of 1%, 2%, 3%, 4% and 5%. Two major types of testing were conducted for the purpose of this study, i.e. Flexural Fatigue Tests (dynamic loading) and Flexural Beam Tests (static loading). The flexural fatigue tests were carried out with strain control mode. From the tests, the flexural stiffness for each specimen was calculated. The flexural stiffness was obtained from maximum tensile strains on the bottom of the specimens. The outcomes of the paper are as summarised as follow: First, 1% to 3% CTB was found out to be classified as modified material while 4% and 5% CTB are categorized as stabilised materials. Second, fatigue cracking phenomenon can be seen in stabilised materials (4% and 5% CTB) while other types of distress may affect the behaviour of modified materials (1 to 3% CTB). Third, 4% cemented material is observed to be the most suitable material to perform under fatigue loading conditions. Fourth, a series of recommendations are presented for further research i.e. the Flexural Fatigue Test be conducted at a suitable (lower) strain value instead of the 400 µe magnitude used in this research.

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