Dynamic behavior of cement-stabilized organic-matter-disseminated sand under cyclic triaxial condition

Juan, Du; Liu, Bingyang; Wang, Zaicheng; Zheng, Gang; Jiang, Ning-Jun; Zhou, Mingliang; Zhou, Haizuo

doi:10.1016/j.soildyn.2021.106777

Cited by 18 publications

(4 citation statements)

References 24 publications

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“…90% of MDD). All specimens are cured for 7 days in a standard curing chamber (at 20 °C ± 2 °C and relative humidity of 95%) 35 .…”

Section: Methodsmentioning

confidence: 99%

Dynamic elasticity modulus of weathered red sandstone soil subject to drying-wetting cycles

Yun-ye

2023

Preprint

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The drying-wetting cycles has a significant effect on the dynamic behavior of the weathered red sandstone soil. A series of the unconsolidated undrained dynamic triaxial tests were conducted on the weathered red sandstone soil samples under different numbers of drying-wetting cycles N, and the hysteresis curves and dynamic backbone curves were obtained under different confining pressures σ3. A hyperbolic model of dynamic backbone curve based on Hardin-Drnevich model was proposed, and the regression expressions between the parameters of the proposed model and N were presented. The relation between the maximum dynamic elasticity modulus Edmax and N, σ3 was analyzed based on the proposed hyperbolic model. The fitting equation of dynamic elasticity modulus Ed and dynamic stress σd was put forward, and the relation between dynamic elasticity modulus Ed and N was studied. The main conclusions from this work as follows: (1) Hardin-Drnevich model can well express the hyperbolic behaviors of dynamic backbone curves of the weathered red sandstone soil. The proposed hyperbolic model and the expressions of Edmax and Ed can well reflect the influences of the numbers of drying-wetting cycles and σ3 on Edmax and Ed respectively. (2) Edmax and Ed increase with the increase of σ3 under certain N; and decrease with N under a certain σ3. (3) Ed of the weathered red sandstone soil increases non-linearly with the increase of dynamic strain εd. The introduced factor β can quantitatively reflects the influences of N on Edmax .

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“…90% of MDD). All specimens are cured for 7 days in a standard curing chamber (at 20 °C ± 2 °C and relative humidity of 95%) 35 .…”

Section: Methodsmentioning

confidence: 99%

Dynamic elasticity modulus of weathered red sandstone soil subject to drying-wetting cycles

Yun-ye

2023

Preprint

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“…A better compressive strength at the dry state and after 48h of immersion in water was obtained with chemical stabilisation at cement content higher than 8%. Du et al [ 22 ] studied the cyclic triaxial behavior of cement-stabilized Organic matter–disseminated sand under various confining pressures, curing periods, and cement contents. 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.…”

Section: Introductionmentioning

confidence: 99%

Experimental study on the effect of different cement content on the improvement of dynamic characteristics of seismic-prone poor soil

Zhao,

Qiao,

Meng

et al. 2024

PLoS ONE

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The improvement of sandy soils with poor seismic properties to modify their dynamic characteristics is of great importance in seismic design for engineering sites. In this study, a series of dynamic tests on sandy soils sandy soils with poor seismic conditions were conducted using the GCTS resonant column system to investigate the improvements effects of different cement contents on dynamic characteristic parameters. The research findings are as follows: The cement content has certain influences on the dynamic shear modulus, dynamic shear modulus ratio, the maximum dynamic shear modulus, and the damping ratio of sandy soils with poor seismic properties. Among them, the influence on dynamic shear modulus is limited, while the damping ratio is significantly affected. The addition of cement to seismic-poor sandy soils significantly enhances their dynamic characteristics. The most noticeable improvement is observed when the cement content is 8%. Through curve fitting analysis, a relationship equation is established between the maximum dynamic shear modulus and the cement content, and the relevant parameters are provided. A comparative test between the improved soils and the remolded soils reveals that the addition of cement significantly improves the seismic performance of the poor soils. The recommended values for the range of variation of the dynamic shear modulus ratio and damping ratio are provided, considering the effect of improvement. These research findings provide reference guidelines for seismic design and engineering sites.

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“…In geotechnical engineering, soil stabilisation by chemical admixtures such as lime/ cement has recently gained popularity (Petry & Little, 2002). Increased modulus of elasticity and resilient modulus under static loading (Yi et al, 2022) or even cyclic loading (Du et al, 2021), strength properties, reduced plasticity index, permeability, decreased swelling potential and volume instability, deformation and settlement, and improved durability are only a few benefits of lime/cement as stabilisation materials (Behnood et al, 2018). However, they are not used in high-velocity rail substructures because their mechanical fatigue behaviour is unknown and undetermined .…”

Section: Introductionmentioning

confidence: 99%

Fibre-Reinforced Soil Mixed Lime/Cement Additives: A Review

Tamassoki¹,

Daud²,

Nejabi³

et al. 2022

JST

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Soil modification is a technique for improving poor soil properties to make them suitable for engineering projects. Regarding the previous studies, various types of stabilisations were used to improve mechanical properties in soil. Several methodologies and experimental tests were used to study the positive and negative effects of utilising fibre on lime/cement-modified soil. This paper reviews the strength behaviour and microstructural properties of Fibre-Reinforced Lime Stabilised (FRLS) soil and Fibre-Reinforced Cement Stabilised (FRCS) Soil. First, the impact of FRLS/FRCS soil on strength behaviour under freeze-thaw conditions, the California Bearing Ratio (CBR) value, and compression/tensile strength are all examined. Then synthetic and natural fibres are compared at the microstructure level. FRCS/FRLS soil has been studied for its influence on geotechnical characteristics such as peak strength, residual strength, ductility, bearing capacity, stiffness, and settlement values. In addition, the micro-level evidence demonstrates that lime/cement affects the interlocking between soil particles and fibre. Although lime/cement improves soil strength by making it solid and compact, it makes stabilised soil brittle. Fibre as reinforcement in lime/cement stabilised soil transforms the brittleness of the soil into ductility. Hence building various infrastructures on poor soils is possible if fibre with lime/cement is used as an improvement method. Here, these three most used soil additive materials are investigated in terms of strength, microstructural, mineralisation, and some open issues are suggested for further research.

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Dynamic behavior of cement-stabilized organic-matter-disseminated sand under cyclic triaxial condition

Cited by 18 publications

References 24 publications

Dynamic elasticity modulus of weathered red sandstone soil subject to drying-wetting cycles

Dynamic elasticity modulus of weathered red sandstone soil subject to drying-wetting cycles

Experimental study on the effect of different cement content on the improvement of dynamic characteristics of seismic-prone poor soil

Fibre-Reinforced Soil Mixed Lime/Cement Additives: A Review

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