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    Influence of Aggregate Mineral Grain Size and Size Distribution on Pavement Surface Microtexture Deterioration

    Source: Journal of Transportation Engineering, Part B: Pavements:;2024:;Volume ( 150 ):;issue: 002::page 04024014-1
    Author:
    Nabanita Roy
    ,
    Kranthi Kumar Kuna
    DOI: 10.1061/JPEODX.PVENG-1422
    Publisher: ASCE
    Abstract: The objective of this paper is to assess the impact of mineral grain size and grain size distribution of aggregates on the deterioration of pavement surface microtexture. For the study, aggregates were collected from nine different sources to cover a wide variation in mineralogical type. The grain size parameters were obtained by detecting mineral grain boundaries using scanning electron microscope electron back scattered diffraction (SEM EBSD) analysis on thin sections prepared from the aggregates. Scanning electron microscope (SEM) analysis was also carried out on thin sections of all aggregate types to determine their mineralogical composition. Microtexture deterioration was measured by collecting the British pendulum number (BPN) of the aggregate after every hour of polishing for six hours using an accelerated polishing machine. From the mineral composition analysis, it was observed that the aggregates in the study belonged to three rock types: granite, amphibolite, and basalt (three sources of each type). The BPN values of the polished stones indicated that aggregates with finer grains offer more resistance to polishing. Statistical analysis of the test results also suggests that a wide variation in grain sizes in aggregates positively contributes to resistance against polishing. The study confirmed that, for a given rock type, coarse aggregates with finer grains and greater variation in grain size can better withstand microtexture deterioration caused by mechanical polishing from vehicular loads when used in the surface course of pavements.
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      Influence of Aggregate Mineral Grain Size and Size Distribution on Pavement Surface Microtexture Deterioration

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    contributor authorNabanita Roy
    contributor authorKranthi Kumar Kuna
    date accessioned2024-04-27T22:27:00Z
    date available2024-04-27T22:27:00Z
    date issued2024/06/01
    identifier other10.1061-JPEODX.PVENG-1422.pdf
    identifier urihttp://yetl.yabesh.ir/yetl1/handle/yetl/4296678
    description abstractThe objective of this paper is to assess the impact of mineral grain size and grain size distribution of aggregates on the deterioration of pavement surface microtexture. For the study, aggregates were collected from nine different sources to cover a wide variation in mineralogical type. The grain size parameters were obtained by detecting mineral grain boundaries using scanning electron microscope electron back scattered diffraction (SEM EBSD) analysis on thin sections prepared from the aggregates. Scanning electron microscope (SEM) analysis was also carried out on thin sections of all aggregate types to determine their mineralogical composition. Microtexture deterioration was measured by collecting the British pendulum number (BPN) of the aggregate after every hour of polishing for six hours using an accelerated polishing machine. From the mineral composition analysis, it was observed that the aggregates in the study belonged to three rock types: granite, amphibolite, and basalt (three sources of each type). The BPN values of the polished stones indicated that aggregates with finer grains offer more resistance to polishing. Statistical analysis of the test results also suggests that a wide variation in grain sizes in aggregates positively contributes to resistance against polishing. The study confirmed that, for a given rock type, coarse aggregates with finer grains and greater variation in grain size can better withstand microtexture deterioration caused by mechanical polishing from vehicular loads when used in the surface course of pavements.
    publisherASCE
    titleInfluence of Aggregate Mineral Grain Size and Size Distribution on Pavement Surface Microtexture Deterioration
    typeJournal Article
    journal volume150
    journal issue2
    journal titleJournal of Transportation Engineering, Part B: Pavements
    identifier doi10.1061/JPEODX.PVENG-1422
    journal fristpage04024014-1
    journal lastpage04024014-12
    page12
    treeJournal of Transportation Engineering, Part B: Pavements:;2024:;Volume ( 150 ):;issue: 002
    contenttypeFulltext
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