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Dynamic behavior of cement-stabilized organic-matter-disseminated sand under cyclic triaxial condition
https://orcid.org/0000-0002-2640-042X
Abstract Organic matter–disseminated sand (OMDS) is a problematic soil widely distributed in Hainan Province, China. OMDS is usually stabilized using cementitious materials to improve its bearing capacity. However, there is a lack of understanding of the dynamic characteristics of cement-stabilized OMDS. In this study, a series of unconsolidated undrained stress-controlled cyclic triaxial shear tests were conducted on OMDS samples stabilized by cement and lime. The cyclic triaxial behavior of cement-stabilized OMDS under various confining pressures, curing periods, and cement contents was studied. Through data fittings, the maximum elastic modulus (E max), normalized elastic modulus (E d/E max), and maximum dynamic damping ratio (λ max) were obtained. Then, the effects of cement content, curing time, and initial confining pressure on E max, E d/E max and λ max were systematically analyzed. Finally, the effectiveness of cement stabilization on the dynamic behavior of cement-stabilized OMDS was discussed by comparing the data with that of un-cemented OMDS.
Highlights Dynamic triaxial shear behavior of cement-stabilized organic sand is investigated. E max increases with confining pressure, cement content, and curing time. Normalized dynamic elastic modulus (E d/E max) is independent of confining pressure. λ max reduces with confining pressure, cement content, and curing time.
Dynamic behavior of cement-stabilized organic-matter-disseminated sand under cyclic triaxial condition
https://orcid.org/0000-0002-2640-042X
Abstract Organic matter–disseminated sand (OMDS) is a problematic soil widely distributed in Hainan Province, China. OMDS is usually stabilized using cementitious materials to improve its bearing capacity. However, there is a lack of understanding of the dynamic characteristics of cement-stabilized OMDS. In this study, a series of unconsolidated undrained stress-controlled cyclic triaxial shear tests were conducted on OMDS samples stabilized by cement and lime. The cyclic triaxial behavior of cement-stabilized OMDS under various confining pressures, curing periods, and cement contents was studied. Through data fittings, the maximum elastic modulus (E max), normalized elastic modulus (E d/E max), and maximum dynamic damping ratio (λ max) were obtained. Then, the effects of cement content, curing time, and initial confining pressure on E max, E d/E max and λ max were systematically analyzed. Finally, the effectiveness of cement stabilization on the dynamic behavior of cement-stabilized OMDS was discussed by comparing the data with that of un-cemented OMDS.
Highlights Dynamic triaxial shear behavior of cement-stabilized organic sand is investigated. E max increases with confining pressure, cement content, and curing time. Normalized dynamic elastic modulus (E d/E max) is independent of confining pressure. λ max reduces with confining pressure, cement content, and curing time.
Dynamic behavior of cement-stabilized organic-matter-disseminated sand under cyclic triaxial condition
https://orcid.org/0000-0002-2640-042X
Abstract Organic matter–disseminated sand (OMDS) is a problematic soil widely distributed in Hainan Province, China. OMDS is usually stabilized using cementitious materials to improve its bearing capacity. However, there is a lack of understanding of the dynamic characteristics of cement-stabilized OMDS. In this study, a series of unconsolidated undrained stress-controlled cyclic triaxial shear tests were conducted on OMDS samples stabilized by cement and lime. The cyclic triaxial behavior of cement-stabilized OMDS under various confining pressures, curing periods, and cement contents was studied. Through data fittings, the maximum elastic modulus (E max), normalized elastic modulus (E d/E max), and maximum dynamic damping ratio (λ max) were obtained. Then, the effects of cement content, curing time, and initial confining pressure on E max, E d/E max and λ max were systematically analyzed. Finally, the effectiveness of cement stabilization on the dynamic behavior of cement-stabilized OMDS was discussed by comparing the data with that of un-cemented OMDS.
Highlights Dynamic triaxial shear behavior of cement-stabilized organic sand is investigated. E max increases with confining pressure, cement content, and curing time. Normalized dynamic elastic modulus (E d/E max) is independent of confining pressure. λ max reduces with confining pressure, cement content, and curing time.
Dynamic behavior of cement-stabilized organic-matter-disseminated sand under cyclic triaxial condition
Du, Juan (author) / Liu, Bingyang (author) / Wang, Zaicheng (author) / Zheng, Gang (author) / Jiang, Ning-Jun (author) / Zhou, Mingliang (author) / Zhou, Haizuo (author)
2021-04-12
Article (Journal)
Electronic Resource
English
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