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    Sulphuric Acid Resistance of Cementitious Materials: Multiscale Approach to Assessing the Degradation

    Source: Journal of Materials in Civil Engineering:;2020:;Volume ( 032 ):;issue: 007
    Author:
    Lei Gu
    ,
    Phillip Visintin
    ,
    Terry Bennett
    DOI: 10.1061/(ASCE)MT.1943-5533.0003261
    Publisher: ASCE
    Abstract: The deterioration of conventional cement (CC) and alkali-activated (AA) cementitious materials when exposed to sulphuric acid is influenced by the scale, both in terms of scale of manufacture (paste, mortar, and concrete) and level of observation (microscopic to macroscopic). The degradation of samples at the microscale was examined using scanning electron microscopy, energy dispersive x-ray, x-ray diffraction, Fourier transform infrared spectroscopy, and microcomputed tomography. Macroscopic measurements were used to establish the cross-section change, mass loss, and compressive strength. In addition, the ion change in the reservoir solution was examined using inductively coupled plasma mass spectroscopy. Microscale and macroscale measurements highlight the fundamental difference in the degradation of CC and AA materials, and therefore current simple indicator tests are inadequate for comparing the performance of materials.
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      Sulphuric Acid Resistance of Cementitious Materials: Multiscale Approach to Assessing the Degradation

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4266380
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    contributor authorLei Gu
    contributor authorPhillip Visintin
    contributor authorTerry Bennett
    date accessioned2022-01-30T20:01:16Z
    date available2022-01-30T20:01:16Z
    date issued2020
    identifier other%28ASCE%29MT.1943-5533.0003261.pdf
    identifier urihttp://yetl.yabesh.ir/yetl1/handle/yetl/4266380
    description abstractThe deterioration of conventional cement (CC) and alkali-activated (AA) cementitious materials when exposed to sulphuric acid is influenced by the scale, both in terms of scale of manufacture (paste, mortar, and concrete) and level of observation (microscopic to macroscopic). The degradation of samples at the microscale was examined using scanning electron microscopy, energy dispersive x-ray, x-ray diffraction, Fourier transform infrared spectroscopy, and microcomputed tomography. Macroscopic measurements were used to establish the cross-section change, mass loss, and compressive strength. In addition, the ion change in the reservoir solution was examined using inductively coupled plasma mass spectroscopy. Microscale and macroscale measurements highlight the fundamental difference in the degradation of CC and AA materials, and therefore current simple indicator tests are inadequate for comparing the performance of materials.
    publisherASCE
    titleSulphuric Acid Resistance of Cementitious Materials: Multiscale Approach to Assessing the Degradation
    typeJournal Paper
    journal volume32
    journal issue7
    journal titleJournal of Materials in Civil Engineering
    identifier doi10.1061/(ASCE)MT.1943-5533.0003261
    page04020171
    treeJournal of Materials in Civil Engineering:;2020:;Volume ( 032 ):;issue: 007
    contenttypeFulltext
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