Curtin University Homepage
  • Library
  • Help
    • Admin

    espace - Curtin’s institutional repository

    JavaScript is disabled for your browser. Some features of this site may not work without it.
    View Item 
    • espace Home
    • espace
    • Curtin Research Publications
    • View Item
    • espace Home
    • espace
    • Curtin Research Publications
    • View Item

    The ASR mechanism of reactive aggregates in concrete and its mitigation by fly ash: A critical review

    68403.pdf (5.936Mb)
    Access Status
    Open access
    Authors
    Saha, A.
    Khan, M.
    Sarker, Prabir
    Shaikh, Faiz
    Pramanik, Alokesh
    Date
    2018
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Saha, A. and Khan, M. and Sarker, P. and Shaikh, F. and Pramanik, A. 2018. The ASR mechanism of reactive aggregates in concrete and its mitigation by fly ash: A critical review. Construction and Building Materials. 171: pp. 743-758.
    Source Title
    Construction and Building Materials
    DOI
    10.1016/j.conbuildmat.2018.03.183
    ISSN
    0950-0618
    School
    School of Civil and Mechanical Engineering (CME)
    URI
    http://hdl.handle.net/20.500.11937/68221
    Collection
    • Curtin Research Publications
    Abstract

    Alkali-silica reaction (ASR) of reactive aggregates is a major durability concern of concrete. The use of fly ash as a supplementary cementing material (SCM) shows a reliable way to control ASR expansion. This paper investigates the recent findings on effects of coal fly ash as a SCM on ASR of reactive aggregates. ASR is the reaction of amorphous silica of aggregates with highly alkaline pore solution in the binder matrix producing an expansive gel. The use of fly ash as cement replacement reduces pH of the pore solution by alkali binding and thus reduces the aggregate dissolution rate and swelling pressure of the ASR gel. The efficiency of fly ash primarily depends on its chemical composition with low calcium fly ash being more effective in mitigation of ASR expansion. Based on the available literature, this paper also analyses the ASR mitigation mechanisms of fly ash and provides some recommendations for future research. The degree of aggregate reactivity measurement, effect of alumina in fly ash, swelling properties of ASR gel in presence of fly ash and the long-term alkali contribution of fly ash on ASR are of particular importance.

    Related items

    Showing items related by title, author, creator and subject.

    • Novel bio-spectroscopic imaging reveals disturbed protein homeostasis and thiol redox with protein aggregation prior to hippocampal CA1 pyramidal neuron death induced by global brain ischemia in the rat
      Hackett, Mark; Smith, S.; Caine, S.; Nichol, H.; George, G.; Pickering, I.; Paterson, P. (2015)
      Global brain ischemia resulting from cardiac arrest and cardiac surgery can lead to permanent brain damage and mental impairment. A clinical hallmark of global brain ischemia is delayed neurodegeneration, particularly ...
    • Value added utilization of by-product electric furnace ferronickel slag as construction materials: A review
      Saha, A.; Khan, M.; Sarker, Prabir (2018)
      This paper reviews the potential use of electric furnace ferronickel slag (FNS) as a fine aggregate and binder in Portland cement and geopolymer concretes. It has been reported that the use of FNS as a fine aggregate can ...
    • The characteristics of organic matter influence its interfacial interactions with MnO2 and catalytic oxidation processes
      Zhang, S.; Gutierrez, L.; Niu, X.; Qi, F.; Croue, Jean-Philippe (2018)
      The influence of dissolved organic matter (DOM) properties on its interfacial interactions with MnO2and on catalytic oxidation processes was studied by Time-Resolved Dynamic Light Scattering (TR-DLS) and Atomic Force ...
    Advanced search

    Browse

    Communities & CollectionsIssue DateAuthorTitleSubjectDocument TypeThis CollectionIssue DateAuthorTitleSubjectDocument Type

    My Account

    Admin

    Statistics

    Most Popular ItemsStatistics by CountryMost Popular Authors

    Follow Curtin

    • 
    • 
    • 
    • 
    • 

    CRICOS Provider Code: 00301JABN: 99 143 842 569TEQSA: PRV12158

    Copyright | Disclaimer | Privacy statement | Accessibility

    Curtin would like to pay respect to the Aboriginal and Torres Strait Islander members of our community by acknowledging the traditional owners of the land on which the Perth campus is located, the Whadjuk people of the Nyungar Nation; and on our Kalgoorlie campus, the Wongutha people of the North-Eastern Goldfields.