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    Interlayer Aggregates Embeddedness Index and Its Characterization for Interlayer Bonding Quality of Roller-Compacted Concrete

    Source: Journal of Materials in Civil Engineering:;2023:;Volume ( 035 ):;issue: 010::page 04023331-1
    Author:
    Xietian Xia
    ,
    Donghai Liu
    DOI: 10.1061/JMCEE7.MTENG-14702
    Publisher: ASCE
    Abstract: Interlayer bonding is one of the critical principles of roller-compacted concrete (RCC) construction. The fundamental premise of ensuring interlayer bonding quality is embedding interlayer aggregates (IAs) into the lower layer of the RCC during vibratory compaction. This paper demonstrated the relationship between the RCC bonding quality and the embedding value (EV) of IAs of various sizes by first theoretically analyzing the failure model of the interlayer strength of the RCC, and then defining an index called the interlayer aggregates embeddedness index (IAEI) to characterize the overall influence of the size and EV of IAs. An experiment scheme was designed to examine the characterizing comprehensiveness of the IAEI for interlayer bonding strength of RCC. In the experiment scheme, IAs of three different sizes were placed on the bedding surface of RCC and two different vibration times were set on the upper layer of the RCC when molding to produce different EVs of different size IAs. The EVs of the IAs in the RCC were measured using computed tomography (CT) scanning and inert stain dying, and the interlayer bonding quality was measured using the direct shear test. The results showed an increase in the EV led to an improvement in the interlayer shear strength. With an adequate vibration time of two times the vibrating compacted (VC) value, the shear strength of the RCC grew as the particle size of the IA increased. For placed IAs, the EV of the IAs increased with the growth of particle size. For natural IAs, the number grew with vibration time increasing, and the particle size distribution was mainly below 2.5 cm. Compared with other embedding-related indices, IAEI showed the best liner correlation with the interlayer shear strength, with a determination coefficient of 0.89, which verified the characterizing comprehensiveness of IAEI for interlayer bonding quality of RCC. This study revealed the interlayer bonding mechanism of RCC from the meso perspective of interlayer aggregate embedding.
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      Interlayer Aggregates Embeddedness Index and Its Characterization for Interlayer Bonding Quality of Roller-Compacted Concrete

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4293742
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    contributor authorXietian Xia
    contributor authorDonghai Liu
    date accessioned2023-11-27T23:39:14Z
    date available2023-11-27T23:39:14Z
    date issued7/18/2023 12:00:00 AM
    date issued2023-07-18
    identifier otherJMCEE7.MTENG-14702.pdf
    identifier urihttp://yetl.yabesh.ir/yetl1/handle/yetl/4293742
    description abstractInterlayer bonding is one of the critical principles of roller-compacted concrete (RCC) construction. The fundamental premise of ensuring interlayer bonding quality is embedding interlayer aggregates (IAs) into the lower layer of the RCC during vibratory compaction. This paper demonstrated the relationship between the RCC bonding quality and the embedding value (EV) of IAs of various sizes by first theoretically analyzing the failure model of the interlayer strength of the RCC, and then defining an index called the interlayer aggregates embeddedness index (IAEI) to characterize the overall influence of the size and EV of IAs. An experiment scheme was designed to examine the characterizing comprehensiveness of the IAEI for interlayer bonding strength of RCC. In the experiment scheme, IAs of three different sizes were placed on the bedding surface of RCC and two different vibration times were set on the upper layer of the RCC when molding to produce different EVs of different size IAs. The EVs of the IAs in the RCC were measured using computed tomography (CT) scanning and inert stain dying, and the interlayer bonding quality was measured using the direct shear test. The results showed an increase in the EV led to an improvement in the interlayer shear strength. With an adequate vibration time of two times the vibrating compacted (VC) value, the shear strength of the RCC grew as the particle size of the IA increased. For placed IAs, the EV of the IAs increased with the growth of particle size. For natural IAs, the number grew with vibration time increasing, and the particle size distribution was mainly below 2.5 cm. Compared with other embedding-related indices, IAEI showed the best liner correlation with the interlayer shear strength, with a determination coefficient of 0.89, which verified the characterizing comprehensiveness of IAEI for interlayer bonding quality of RCC. This study revealed the interlayer bonding mechanism of RCC from the meso perspective of interlayer aggregate embedding.
    publisherASCE
    titleInterlayer Aggregates Embeddedness Index and Its Characterization for Interlayer Bonding Quality of Roller-Compacted Concrete
    typeJournal Article
    journal volume35
    journal issue10
    journal titleJournal of Materials in Civil Engineering
    identifier doi10.1061/JMCEE7.MTENG-14702
    journal fristpage04023331-1
    journal lastpage04023331-13
    page13
    treeJournal of Materials in Civil Engineering:;2023:;Volume ( 035 ):;issue: 010
    contenttypeFulltext
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