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    Small-Strain Stiffness of Natural Pumiceous Sand

    Source: Journal of Geotechnical and Geoenvironmental Engineering:;2020:;Volume ( 146 ):;issue: 006
    Author:
    Mohammad Bagher Asadi
    ,
    Mohammad Sadeq Asadi
    ,
    Rolando. P. Orense
    ,
    Michael. J. Pender
    DOI: 10.1061/(ASCE)GT.1943-5606.0002256
    Publisher: ASCE
    Abstract: This paper focuses on the small-strain shear modulus (Gmax) of natural pumiceous (NP) sands, a type of crushable volcanic soil commonly found in the North Island of New Zealand. These sands are also compressible and lightweight, resulting in difficulty to accurately evaluate their geotechnical properties. To better understand the Gmax dependency of these NP sands on effective confining pressure (σc′) and void ratio (e), bender element tests are performed on three types of locally sourced NP sands and, for comparison purposes, similar tests are conducted on hard-grained Toyoura sand. The results illustrate that the Gmax of NP sands are considerably lower than that of Toyoura sand over a wide range of e and σc′. Furthermore, materials with higher pumice content show higher dependency on σc′ and lower dependency on e compared with those with lower pumice content as well as Toyoura sand. Particle characteristics (e.g., particle shape, particle-size distribution, particle crushing, pumice content, compressibility, and fines content) are taken into consideration to explain the different response of the tested materials.
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      Small-Strain Stiffness of Natural Pumiceous Sand

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4268884
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    contributor authorMohammad Bagher Asadi
    contributor authorMohammad Sadeq Asadi
    contributor authorRolando. P. Orense
    contributor authorMichael. J. Pender
    date accessioned2022-01-30T21:48:48Z
    date available2022-01-30T21:48:48Z
    date issued6/1/2020 12:00:00 AM
    identifier other%28ASCE%29GT.1943-5606.0002256.pdf
    identifier urihttp://yetl.yabesh.ir/yetl1/handle/yetl/4268884
    description abstractThis paper focuses on the small-strain shear modulus (Gmax) of natural pumiceous (NP) sands, a type of crushable volcanic soil commonly found in the North Island of New Zealand. These sands are also compressible and lightweight, resulting in difficulty to accurately evaluate their geotechnical properties. To better understand the Gmax dependency of these NP sands on effective confining pressure (σc′) and void ratio (e), bender element tests are performed on three types of locally sourced NP sands and, for comparison purposes, similar tests are conducted on hard-grained Toyoura sand. The results illustrate that the Gmax of NP sands are considerably lower than that of Toyoura sand over a wide range of e and σc′. Furthermore, materials with higher pumice content show higher dependency on σc′ and lower dependency on e compared with those with lower pumice content as well as Toyoura sand. Particle characteristics (e.g., particle shape, particle-size distribution, particle crushing, pumice content, compressibility, and fines content) are taken into consideration to explain the different response of the tested materials.
    publisherASCE
    titleSmall-Strain Stiffness of Natural Pumiceous Sand
    typeJournal Paper
    journal volume146
    journal issue6
    journal titleJournal of Geotechnical and Geoenvironmental Engineering
    identifier doi10.1061/(ASCE)GT.1943-5606.0002256
    page5
    treeJournal of Geotechnical and Geoenvironmental Engineering:;2020:;Volume ( 146 ):;issue: 006
    contenttypeFulltext
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