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    Optimum Mixing Ratio and Shear Strength of Granulated Rubber–Fly Ash Mixtures

    Source: Journal of Materials in Civil Engineering:;2019:;Volume ( 031 ):;issue: 004
    Author:
    Bhargav Kumar Karnam Prabhakara; Prashant Vyankatesh Guda; Umashankar Balunaini
    DOI: 10.1061/(ASCE)MT.1943-5533.0002639
    Publisher: American Society of Civil Engineers
    Abstract: Studies on shredded waste tires mixed with sand for fill applications are well documented. In this study, a new composite material from mixture of shredded tires and fly ash as fill material is explored. Shredded waste tires with nominal size equal to 9.5 mm (granulated rubber), and fly ash generated from two thermal power plants are used in the study. The composite material is obtained by mixing different proportions of granulated rubber and fly ash. Granulated rubber content equal to 0%, 10%, 30%, and 60% (by weight of fly ash) in the mixture are tested. Compaction characteristics, optimum mixing ratio, and shear strength properties of the mixtures are determined. The maximum dry unit weight and the optimum water content values ranged between 15%–22.5% and 12.6–14.6  kN/m3, and 10%–27% and 10.5–11.6  kN/m3 for mixtures prepared with fly ashes from two sources. Large-size direct shear apparatus is used to obtain the angle of shearing resistance and apparent cohesion of mixtures at both peak state and at near end-of-test. The shear strength of fly ash and granulated rubber mixture is found to be higher than that of fly ash alone or granulated rubber alone, and the maximum shear strength of the composite material is observed for granulated rubber contents equal to about 60% (by weight of fly ash). The peak shear strength parameters of mixtures, apparent cohesion and friction angle, are found to be in the range 14.9–46.0 kPa and 37.5°–50.1°, respectively. Based on minimum void ratio, optimum mix proportions of granulated rubber and fly ash from two sources ranges between 54%–100% and 81%–185% (by weight of fly ash). Based on shear strength testing, fly ash-granulated rubber mixtures are found to perform better than sand-granulated rubber mixtures.
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      Optimum Mixing Ratio and Shear Strength of Granulated Rubber–Fly Ash Mixtures

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    contributor authorBhargav Kumar Karnam Prabhakara; Prashant Vyankatesh Guda; Umashankar Balunaini
    date accessioned2019-03-10T12:21:31Z
    date available2019-03-10T12:21:31Z
    date issued2019
    identifier other%28ASCE%29MT.1943-5533.0002639.pdf
    identifier urihttp://yetl.yabesh.ir/yetl1/handle/yetl/4255375
    description abstractStudies on shredded waste tires mixed with sand for fill applications are well documented. In this study, a new composite material from mixture of shredded tires and fly ash as fill material is explored. Shredded waste tires with nominal size equal to 9.5 mm (granulated rubber), and fly ash generated from two thermal power plants are used in the study. The composite material is obtained by mixing different proportions of granulated rubber and fly ash. Granulated rubber content equal to 0%, 10%, 30%, and 60% (by weight of fly ash) in the mixture are tested. Compaction characteristics, optimum mixing ratio, and shear strength properties of the mixtures are determined. The maximum dry unit weight and the optimum water content values ranged between 15%–22.5% and 12.6–14.6  kN/m3, and 10%–27% and 10.5–11.6  kN/m3 for mixtures prepared with fly ashes from two sources. Large-size direct shear apparatus is used to obtain the angle of shearing resistance and apparent cohesion of mixtures at both peak state and at near end-of-test. The shear strength of fly ash and granulated rubber mixture is found to be higher than that of fly ash alone or granulated rubber alone, and the maximum shear strength of the composite material is observed for granulated rubber contents equal to about 60% (by weight of fly ash). The peak shear strength parameters of mixtures, apparent cohesion and friction angle, are found to be in the range 14.9–46.0 kPa and 37.5°–50.1°, respectively. Based on minimum void ratio, optimum mix proportions of granulated rubber and fly ash from two sources ranges between 54%–100% and 81%–185% (by weight of fly ash). Based on shear strength testing, fly ash-granulated rubber mixtures are found to perform better than sand-granulated rubber mixtures.
    publisherAmerican Society of Civil Engineers
    titleOptimum Mixing Ratio and Shear Strength of Granulated Rubber–Fly Ash Mixtures
    typeJournal Paper
    journal volume31
    journal issue4
    journal titleJournal of Materials in Civil Engineering
    identifier doi10.1061/(ASCE)MT.1943-5533.0002639
    page04019018
    treeJournal of Materials in Civil Engineering:;2019:;Volume ( 031 ):;issue: 004
    contenttypeFulltext
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