Article
Engineering, Geological
K. Pan, Z. H. Yuan, C. F. Zhao, J. H. Tong, Z. X. Yang
Summary: This study experimentally investigates the undrained shear behavior and stiffness characteristics of marine clay in southeast China. The results show a correlation between the elastic stiffness and the secant modulus, and the samples under cyclic loading are stiffer than those under monotonic loading.
ENGINEERING GEOLOGY
(2022)
Article
Engineering, Ocean
Nadiah Jamaludin, Nor Zurairahetty Mohd Yunus, Siti Norafida Jusoh, Faizal Pakir, Ahmed Mohammed Awad Mohammed
Summary: This study uses coal ash to stabilize marine clay soil, and the results show that the strength of the treated soil sample increases with increasing additive percentage and curing period. The composition of minerals in the untreated soil sample changes over time.
MARINE GEORESOURCES & GEOTECHNOLOGY
(2023)
Article
Construction & Building Technology
Sichen Li, Dongxing Wang, Changyi Tang, Yiren Chen
Summary: This study investigates the synergy of ordinary Portland cement(OPC), ground granulated blast furnace slag (GGBS), and phosphogypsum (PG) in solidifying marine soft clay. The ternary blending of OPC, GGBS, and PG in a 5:3:2 ratio results in a high-efficiency ternary cement (TC) that exhibits better strength performance than cement or binary cement (OPC-GGBS/PG) solidified clay, due to the combined action of pozzolanic reaction and ettringite formation. The addition of NaOH (NH) and Na2SO4 (NS) dramatically improves the early strength of TC solidified clay, while the composite additives NS/CA and NS/NA result in greater strength gains. The improved mechanical performance is attributed to increased basicity and the more effective role of ettringite, with NS/CA inducing clustered growth of ettringite and NS/NA providing structural support through oriented patterns of ettringite.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Engineering, Civil
Jianwen Ding, Xing Wan, Jianhua Wang, Cong Mou, Mengying Gao
Summary: Efficient resource utilization of marine dredged clay is crucial to sustainable offshore works. Cement-treated dredged clay can be utilized for the construction of artificial islands, with the influence of cement addition on compressibility being examined. The compressibility of cemented dredged clay is determined by initial water content and cement content, with curing time having a significant impact on higher initial water content specimens.
GEOMECHANICS AND ENGINEERING
(2021)
Article
Engineering, Geological
Di Dai, Jie Peng, Renjie Wei, Liangliang Li, Hongmin Lin
Summary: This study investigates the dynamic behavior of cement-stabilized soil with and without super-absorbent polymer (SAP) through consolidated undrained cyclic triaxial shear tests. The results show that SAP can improve the dynamic characteristics of soil, mitigate brittle failure, and reduce the negative impact on superstructures under cyclic loading.
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
(2022)
Article
Engineering, Chemical
Yulin Zhang, Fuqian Yang
Summary: The study prepared carbon microspheres using hydrothermal process, and investigated the compression behavior of wetted carbon-based disks made from carbon microspheres and polytetrafluoroethylene. It was found that the compressive stress exhibited statistical variability and followed a power-law relation with the average maximum strain.
Article
Engineering, Mechanical
Matthew J. Luceadams, Mike Steinzig, Abdessattar Abdelkefi, David Mascarenas
Summary: Previous research has found that static and dynamic measurements differ in estimating Poisson's ratio due to various factors that affect these tests differently. In addition, even under the assumption of isotropic and homogeneous material properties, discrepancies between static and dynamic test results exist due to inherent differences in diagnostic techniques. Furthermore, thermodynamic effects can significantly impact dynamic test results. However, combining time-averaged scanning digital holography with Cornu's method can theoretically estimate the effective Poisson's ratio regardless of frequency and testing method.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2023)
Article
Engineering, Ocean
Xiuhao Li, Zhijing Zhu, Rentai Liu, Chunyu Zhang, Qingsong Zhang, Shucai Li, Mengjun Chen
Summary: This study aims to develop an anti-washout grout using marine soft clay for stabilizing wind power pile foundations. Main materials used for modification were cement, hydroxypropyl-methyl cellulose ether (HPMC), and sodium silicate. The study investigated various properties of the grout, including fluidity, bleeding rate, setting time, rheology, anti-washout characteristics, and compressive strength. The results showed that high cement content, HPMC, and sodium silicate reduced workability but improved washout resistance. The addition of HPMC and sodium silicate increased yield stress and plastic viscosity of the grout. Sodium silicate content influenced early strength, while cement content and HPMC affected later strength. The microstructure analysis revealed significant changes in C-S-H gel morphology and the content of ettringite and calcium hydroxide, along with the presence of Friedel's salt. This study provides valuable guidance for utilizing marine soft clay, preparing anti-washout grout, and controlling pile foundation stability.
MARINE GEORESOURCES & GEOTECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
S. Shrikanth, Suresh Neelakantan, Rajesh Prasad
Summary: The elastic properties of crystalline solids are anisotropic. The shear modulus G(n,m) depends on both the shear plane normal n and the shear direction m. This study investigates the anisotropy of the shear modulus within shear planes and presents novel 3D surfaces to represent this anisotropy. It is found that shear planes with G(n,m) independent of m can exist in all crystal systems.
MECHANICS OF MATERIALS
(2023)
Review
Chemistry, Physical
Philippe Cosenza, Richard Giot, Stephen Hedan
Summary: The objective of this review paper is to compare and analyze the data of elastic moduli of clay minerals acquired through different experimental and theoretical methods. The comparison reveals four sets of results, including the estimation of elastic constants of nonswelling minerals through molecular modeling, the sensitivity of elastic properties of swelling minerals to interlayer water, the representation of clay mineral assemblages by values obtained from geophysical or geomechanical data, and the solid nature of the elastic properties of interlayer water.
APPLIED CLAY SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
Jiawei Feng, Bo Liu, Zhiwei Lin, Jianzhong Fu
Summary: This study proposes two strategies to design isotropic TPMS structures and investigates the relationship between TPMS parameters and elastic modulus or anisotropy properties through numerical homogenization theory and finite element analysis methods. By utilizing a Curvature-Wall thickness (CW) adjustment method, both elastic modulus and anisotropy properties can be controlled, and composite TPMS structures can be designed by combining TPMS units. Experimental results confirm the effectiveness and accuracy of the proposed approaches.
MATERIALS & DESIGN
(2021)
Article
Food Science & Technology
M. Imran H. Khan, Duval Longa, Shyam S. Sablani, YuanTong Gu
Summary: This study proposes a machine learning-based model to characterize the micromechanical properties of plant-based food materials. By developing an artificial neural network model and optimizing it, the elastic modulus, stiffness, and hardness of plant-based food materials can be accurately predicted. The model has the potential to be used for characterizing the micromechanical properties of similar food products.
FOOD AND BIOPROCESS TECHNOLOGY
(2023)
Article
Chemistry, Physical
Pei Bai, Mingchao Ma, Li Sui, Yunlong Guo
Summary: This study demonstrates significant changes in stiffness and the ratio between elastic and viscous responses in thin PDMS films under nanoconfinement, with an enhanced elastic modulus and increased viscous response observed. The results contribute to a better understanding of the nanoconfinement effect on viscoelastic properties of soft matter.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2021)
Article
Materials Science, Multidisciplinary
Thomas Buchner, Thomas Kiefer, Markus Koenigsberger, Andreas Jaeger, Josef Fuessl
Summary: In this study, a continuum micromechanics multiscale approach was employed to upscale microstructural features to quantify the macroscopic properties of fired clay bricks. By introducing spheroidal phases with characteristic orientation distribution at two observation scales, the homogenized macroscopic stiffness and conductivity matched well with independent results from novel macroscopic tests for all seven studied brick compositions. This validates the microstructure-informed multiscale model approach and its assumptions, such as the linear increase of binding matrix properties with carbonate content and the limitations of large quartz with interface cracks in bearing mechanical loads.
MATERIALS & DESIGN
(2021)
Article
Polymer Science
Zhigang Peng, Huan Zhang, Qian Feng, Yong Zheng
Summary: This study successfully improved the elasticity of cement stone and reduced the cracking mechanism by preparing epoxy resin powder elastic particles (HEEP). HEEP showed good surface wettability and uniform particle size distribution, and exhibited good thermal stability. The cement stone containing HEEP demonstrated better elastic and resistance properties, as observed in stress-strain curves and mechanical performance tests.
JOURNAL OF APPLIED POLYMER SCIENCE
(2023)
