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    Cumulative Deformation Behavior of Coarse-Grained Red Mudstone Soil under Cyclic Loading

    Source: International Journal of Geomechanics:;2024:;Volume ( 024 ):;issue: 011::page 04024245-1
    Author:
    Hua Xu
    ,
    Futang Zhao
    ,
    Yao Hu
    ,
    Feng Gao
    ,
    Yewei Zheng
    DOI: 10.1061/IJGNAI.GMENG-9755
    Publisher: American Society of Civil Engineers
    Abstract: Red mudstone is a problematic soil that is easily subjected to weathering, disintegrating, and swelling. In this study, a series of large-scale cyclic triaxial tests were performed to investigate the cumulative deformation behavior of red mudstone clay mixed with weathered red mudstone gravel as an improved coarse-grained red mudstone soil (IRMS). The influences of compaction moisture content and confining pressure were investigated. The cyclic loading was applied from 25 to 225 kPa with an increment of 25 kPa and 1,000 or 2,000 cycles for each stage at a frequency of 2 Hz. The experimental results indicate that the strains at the onset of failure are approximately 1% for the optimal moisture content (OMC) with the number of cycles N = 14,000–16,000, and the strains are approximately 1% for the moisture content 2% dry of OMC with N = 12,000–14,000, while the strains exceed 10% for the moisture content 2% wet of OMC with N = 3,000–4,000. The cumulative strain decreases with increasing confining pressure from 20 to 50 kPa, but the influence becomes more significant under higher dynamic stress. A prediction model is proposed for the evolution of cumulative strain under cyclic loading. The IRMS could be used as a construction material for railway subgrade with proper control of field compaction moisture content.
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      Cumulative Deformation Behavior of Coarse-Grained Red Mudstone Soil under Cyclic Loading

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    contributor authorHua Xu
    contributor authorFutang Zhao
    contributor authorYao Hu
    contributor authorFeng Gao
    contributor authorYewei Zheng
    date accessioned2025-04-20T10:14:15Z
    date available2025-04-20T10:14:15Z
    date copyright8/23/2024 12:00:00 AM
    date issued2024
    identifier otherIJGNAI.GMENG-9755.pdf
    identifier urihttp://yetl.yabesh.ir/yetl1/handle/yetl/4304281
    description abstractRed mudstone is a problematic soil that is easily subjected to weathering, disintegrating, and swelling. In this study, a series of large-scale cyclic triaxial tests were performed to investigate the cumulative deformation behavior of red mudstone clay mixed with weathered red mudstone gravel as an improved coarse-grained red mudstone soil (IRMS). The influences of compaction moisture content and confining pressure were investigated. The cyclic loading was applied from 25 to 225 kPa with an increment of 25 kPa and 1,000 or 2,000 cycles for each stage at a frequency of 2 Hz. The experimental results indicate that the strains at the onset of failure are approximately 1% for the optimal moisture content (OMC) with the number of cycles N = 14,000–16,000, and the strains are approximately 1% for the moisture content 2% dry of OMC with N = 12,000–14,000, while the strains exceed 10% for the moisture content 2% wet of OMC with N = 3,000–4,000. The cumulative strain decreases with increasing confining pressure from 20 to 50 kPa, but the influence becomes more significant under higher dynamic stress. A prediction model is proposed for the evolution of cumulative strain under cyclic loading. The IRMS could be used as a construction material for railway subgrade with proper control of field compaction moisture content.
    publisherAmerican Society of Civil Engineers
    titleCumulative Deformation Behavior of Coarse-Grained Red Mudstone Soil under Cyclic Loading
    typeJournal Article
    journal volume24
    journal issue11
    journal titleInternational Journal of Geomechanics
    identifier doi10.1061/IJGNAI.GMENG-9755
    journal fristpage04024245-1
    journal lastpage04024245-12
    page12
    treeInternational Journal of Geomechanics:;2024:;Volume ( 024 ):;issue: 011
    contenttypeFulltext
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