Liquefaction characteristics of recycled concrete aggregates

Li, Bo; Wang, Yao; Jin, Quanbin; Chen, Hui

doi:10.1016/j.soildyn.2019.01.038

Cited by 18 publications

(21 citation statements)

References 37 publications

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“…Mohsan et al 38 analyzed the settlement of pavement due to soil liquefaction in their study. In that study, a series of shake table analyses were performed using a laminar box.…”

Section: Numerical Analysismentioning

confidence: 99%

“…The model test results showed that the examined materials are useful for mitigating the liquefaction-induced floating of buried pipes irrespective of the liquefaction potential of the surrounding subsoil. Furthermore, Li et al 38 were investigated the dynamic behaviors of RCA and quartz sand with cyclic triaxial tests and observed that RCA has a higher liquefaction resistance than quartz sand, which had a beneficial effect on the earthquake response. Huang et al 39 studied the effect of particle-size gradation on the cyclic shear behavior of RCA.…”

Section: Introductionmentioning

confidence: 99%

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The effect of RCA pavements on the liquefaction-induced settlement

Akbaş¹,

Subasi²,

İyisan³

2023

Sci Rep

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The use of recycled concrete aggregates (RCA) not only reduces the demand for natural aggregates (NA) but also might improve the behavior of soil under earthquake loading. In this study, the behavior of the pavement constructed using 100% RCA and NA on a sandy soil layer with high liquefaction potential under dynamic loads was investigated by numerical analysis and compared with free field conditions. For this purpose, first, the classical geotechnical properties of 100% RCA and NA materials were obtained, and then the stiffness properties were determined by resilient modulus and permanent deformation tests. In the second stage, three different models were created with pavement with NA and RCA and without pavement on high liquefaction potential sand, and dynamic analyses were carried out by PM4Sand. Numerical analyses show that constructing a subbase and base layers significantly reduces liquefaction-induced settlement on the surface of flexible pavements built on liquefied soils. Moreover, when the case of using RCA instead of NA in the subbase and base layers built on the liquefied soil is examined, the liquefaction-induced settlement values on the surface are obtained either lower or very close. Consequently, this study proposes a new alternative to the use of RCA waste materials instead of NA. It is expected the use of these waste materials will reduce the need for storage space and also reduce the negative environmental effects associated with storage.

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“…Mohsan et al 38 analyzed the settlement of pavement due to soil liquefaction in their study. In that study, a series of shake table analyses were performed using a laminar box.…”

Section: Numerical Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The effect of RCA pavements on the liquefaction-induced settlement

Akbaş¹,

Subasi²,

İyisan³

2023

Sci Rep

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“…Once the soil liquefaction process is initiated due to an earthquake, the soil strength will be significantly lost, and a large flow deformation may occur. In order to better understand the anti-liquefaction ability of soil, Rui et al [18] discussed the effect of particle size of calcareous sand on liquefaction resistance by cyclic simple shear test; Li et al [21][22][23] investigated the liquefaction characteristics of different soil samples through dynamic triaxial tests in recent years, and verified the improvement effect of methods such as adding rubber powder and artificial cementation on liquefaction. Lentini et al [24,25] and Grasso et al [26] comprehensively evaluated the dynamic characteristics and liquefaction resistance of sand in the Ritiro area under cyclic loading in the Ritiro area by laboratory methods and in situ measurements, respectively.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on Stiffness Degradation and Liquefaction Characteristics of Marine Sand in the East Nan-Ao Area in Guangdong Province, China

Liang

Zhang

Wang

et al. 2021

JMSE

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Offshore wind power, as an efficient renewable energy source, is being vigorously developed nowadays. However, the liquefaction of marine sand due to earthquakes brings potential safety hazards to the wind turbine structures. In this study, a series of resonant column and undrained cyclic triaxial tests were carried out to investigate the stiffness degradation and liquefaction characteristics of marine sand in the offshore wind farm at the East Nan-ao area in Guangdong Province (China). Results show that the confining pressure increases the shear modulus of sand and restrains the nonlinearity of modulus. The liquefaction resistance of soils significantly increases with the increase of relative density. The effect of particle size on the liquefaction resistance is related to the cyclic shear stress ratio. The additional pressure induced by the presence of the wind turbine structure enlarges the energy required for shallow soil liquefaction. Besides, a model for predicting shear modulus and another modified model based on Seed’s pore pressure development model have been established, which can efficiently fit the dynamic shear modulus and the generation of excess pore water pressures in the tests, respectively.

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“…Jayakody et al [27] studied the effects of reclaimed asphalt materials on geotechnical characteristics of recycled concrete aggregates as a pavement material. Li et al [28] studied the liquefaction characteristics of recycled concrete aggregates. Bassani et al [29] studied the recycled coarse aggregates from pelletized unused concrete for a more sustainable concrete production.…”

Section: Introductionmentioning

confidence: 99%

Analysis of the Effect of Substitution Rate on the Mechanical Properties of Recycled Concrete Hollow Block

Lijun

2019

Advances in Materials Science and Engineering

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In this paper, to study the compressive and flexural properties of recycled concrete hollow blocks, the quality substitution rate of recycled fine aggregates is taken as a variable parameter, and four kinds of substitution rates are designed, which are 0%, 30%, 60%, and 100%. At the same time, one kind of recycled coarse and fine aggregates is designed, and the quality substitution rate is 100%. 110 specimens of MU10 and MU7.5 strength grades are tested for compressive and flexural strength. The failure process and morphology of the specimens are observed to obtain compressive and flexural strength. Based on the test data, the relationship between compressive and flexural strength of recycled fine aggregates with different replacement ratios is analyzed in detail. The main findings are that experiment results show the compressive and flexural strength decrease with the increase of substitution rate of recycled fine aggregates under the same other conditions. The work of the paper is a new reform for the source of raw materials for wall materials, and it is a new way for the reuse of concrete garbage and has important environmental protection significance and engineering practical significance for building energy saving.

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Liquefaction characteristics of recycled concrete aggregates

Cited by 18 publications

References 37 publications

The effect of RCA pavements on the liquefaction-induced settlement

The effect of RCA pavements on the liquefaction-induced settlement

Experimental Study on Stiffness Degradation and Liquefaction Characteristics of Marine Sand in the East Nan-Ao Area in Guangdong Province, China

Analysis of the Effect of Substitution Rate on the Mechanical Properties of Recycled Concrete Hollow Block

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