Deformation and Damping Characteristics of Lightweight Clay‐EPS Soil under Cyclic Loading

Zhou, You; Li, Mingdong; He, Qibao; Wen, Kejun

doi:10.1155/2018/8093719

Cited by 8 publications

(5 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, under the load level of 0.8, the specimens of FC7 and FC9 failed after approximately 1200 and 500 cycles, respectively, following a rapid increase of axial strain. De Andrade et al [ 44 ] and Zhou et al [ 45 ] obtained similar findings in that the lightweight cement composites did not fatigue up to 10 6 cycles when the applied stress was less than 50% of the peak stress, whereas they could fail below 10 3 cycles beyond that load level. The studies conducted by Gao et al [ 46 ] and Khajeh et al [ 21 ] also indicated that failure of geo-foam materials was observed after the number of cycles exceeds 10 3 and is less than 10 4 .…”

Section: Resultsmentioning

confidence: 67%

Mechanical Performance and Void Structure Change of Foamed Cement Paste Subjected to Static and Cyclic Loading under Plane Strain Conditions

2022

View full text Add to dashboard Cite

Cement-based lightweight materials have received much attention recently in embankment backfill applications, the boundary of which is more close to a plane strain condition. To study the influence of plane strain condition on the behavior and void structure of cement-based lightweight material under cyclic loading, this paper conducted a series of compression tests on foamed cement pastes with densities of 700 and 900 kg/m3 subjected to static and cyclic loading under plane strain conditions. The X-CT technique was adopted to obtain the three-dimensional (3-D) void structures of the specimens before and after the loading tests. The results showed that the plane strain conditions yielded specimen compression strengths 30–50% higher than the unconfined conditions. The specimen integrity endured under load levels of less than 0.5, but failed after approximately 1000 cycles under a load level of 0.8, indicating that cyclic loading could accelerate the degradation of the specimena. The void structures of the specimens showed that the void volumes were featured bfatured an unimodal distribution with unimodal positions in a range of 0.1–0.2 mm3. The unimodal position became higher with the increasing cyclic load level. Slices of the specimens after static and cyclic loading tests suggested that cyclic load could easily lead to the rupture of voids that then merge into bigger voids and the connection of voids forming cracks.

show abstract

Section: Resultsmentioning

confidence: 67%

Mechanical Performance and Void Structure Change of Foamed Cement Paste Subjected to Static and Cyclic Loading under Plane Strain Conditions

2022

View full text Add to dashboard Cite

show abstract

“…The strength of the structural EPS concrete specimens prepared in this study fulfilled the strength level of C30, and the dynamic elastic modulus was a magnitude order less than that of plain concrete of the same strength level. It was reported that the higher the dynamic elastic modulus of concrete was, the greater brittleness and worse crack resistance of concrete would be [12]. Thus, it could be seen that the structural EPS concrete had stronger toughness and superior fatigue stability.…”

Section: Resultsmentioning

confidence: 99%

“…Researches on the dynamic properties of EPS concrete were mainly focused on dynamic compressive/tensile performance [10,11] and energy absorption properties under drastic instantaneous impact [4,5]. Actually, EPS concrete could be designed to endure cyclic loadings, such as traffic loads, and its dynamic properties would not be the same as those measured in other conditions [12]. Hence, it is important to study the dynamic properties of EPS concrete under cyclic loadings.…”

Section: Introductionmentioning

confidence: 99%

Study on the Fatigue and Durability Behavior of Structural Expanded Polystyrene Concretes

You

Miao

et al. 2019

Materials

View full text Add to dashboard Cite

The fatigue and durability characteristics of structural expanded polystyrene concrete (EPS) are especially important when it was applied for structural elements in long-term service. In order to study the fatigue and durability behavior of structural EPS concrete, the long-term cyclic loading experiments and wetting–drying (W-D) cyclic experiments were conducted, respectively. The structural EPS concrete was found to have a relatively large damping and a fairly low dynamic elastic modulus under long-term cyclic load, which illustrated that it had a better energy absorption effect and toughness than plain concrete of the same strength level. Even if fine cracks appeared during the cyclic loading process, the relevant dynamic performance remained stable, which indicated that the structural EPS concrete had superior fatigue stability. In W-D cyclic experiments, the structural EPS concrete exhibited superior sulfate resistance. During the erosion test process, there was a positive correlation between the mass change and the evolution of the compressive strength of the structural EPS concrete, which indicated that ΔmB could be substituted for Δf to evaluate the degree of the structural EPS concrete eroded by sulfate attack. The study focuses on the fatigue performance and sulfate resistance of structural EPS concrete and is of important engineering value for promoting practical long-term operations.

show abstract

“…To determine the stress-strain characteristics of EPS lightweight mixed soil (RDSEM) under cyclic loading, Zhou et al [32] evaluated the effects of cement, EPS particles, and confining pressure (σ 3 ) through a dynamic triaxial test. Zhou et al [33] studied the effects of different cement contents, EC, and σ 3 on the dynamic elastic modulus (E d ) and damping ratio (λ) of EPS granular lightweight clay (LCES) through a dynamic triaxial test, and compared them with the dynamic characteristics of clay. Gao et al [34] studied the changes of stiffness and damping ratio of EPS lightweight soil with EPS, cement content, and confining pressure under low strain.…”

Section: Introductionmentioning

confidence: 99%

Study on Dynamic Modulus and Damping Characteristics of Modified Expanded Polystyrene Lightweight Soil under Cyclic Load

et al. 2023

View full text Add to dashboard Cite

In recent years, expanded polystyrene (EPS) lightweight soil has been widely used as subgrade in soft soil areas because of its light weight and environmental protection. This study aimed to investigate the dynamic characteristics of sodium silicate modified lime and fly ash treated EPS lightweight soil (SLS) under cyclic loading. The effects of EPS particles on the dynamic elastic modulus (Ed) and damping ratio (λ) of SLS were determined through dynamic triaxial tests at various confining pressures (σ3), amplitudes, and cycle times. Mathematical models of the Ed of the SLS, cycle times, and σ3 were established. The results revealed that the EPS particle content played a decisive role in the Ed and λ of the SLS. The Ed of the SLS decreased with an increase in the EPS particle content (EC). The Ed decreased by 60% in the 1–1.5% range of the EC. The existing forms of lime fly ash soil and EPS particles in the SLS changed from parallel to series. With an increase in σ3 and amplitude, the Ed of the SLS gradually decreased, the λ generally decreased, and the λ variation range was within 0.5%. With an increase in the number of cycles, the Ed of the SLS decreased. The Ed value and the number of cycles satisfied the power function relationship. Additionally, it can be found from the test results that 0.5% to 1% was the best EPS content for SLS in this work. In addition, the dynamic elastic modulus prediction model established in this study can better describe the varying trend of the dynamic elastic modulus of SLS under different σ3 values and load cycles, thereby providing a theoretical reference for the application of SLS in practical road engineering.

show abstract

Deformation and Damping Characteristics of Lightweight Clay‐EPS Soil under Cyclic Loading

Cited by 8 publications

References 9 publications

Mechanical Performance and Void Structure Change of Foamed Cement Paste Subjected to Static and Cyclic Loading under Plane Strain Conditions

Mechanical Performance and Void Structure Change of Foamed Cement Paste Subjected to Static and Cyclic Loading under Plane Strain Conditions

Study on the Fatigue and Durability Behavior of Structural Expanded Polystyrene Concretes

Study on Dynamic Modulus and Damping Characteristics of Modified Expanded Polystyrene Lightweight Soil under Cyclic Load

Contact Info

Product

Resources

About