Properties and Applications of Cement-Treated Sand-Expanded Polystyrene Bead Lightweight Fill

Miao, Linchang; Wang, Fei; Han, Jie; Lv, Weihua; Li, Jing

doi:10.1061/(asce)mt.1943-5533.0000556

Cited by 59 publications

(28 citation statements)

References 6 publications

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“…Since it was proposed in the 1960s, EPS composite soil has attracted more attention. Owing to its high-strength, light-weight, and controllable deformation, EPS composite soil has been widely used in practice such as soft soil treatment, embankments and bridge abutments, expressways, and underground pipelines [1][2][3]. Over the past twenty years, numerous tests have been conducted on EPS composite soil to study its physical and mechanical characteristics including unconfined compression tests, uniaxial compression tests, direct shear tests, and triaxial compression tests [4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Dynamic Modulus and Damping Ratio of Eps Composite Soil Under Small Strain Condition

Gao¹,

Wang²,

Wang³

2017

Proceedings of the 6th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (COM

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Section: Introductionmentioning

confidence: 99%

Dynamic Modulus and Damping Ratio of Eps Composite Soil Under Small Strain Condition

Gao¹,

Wang²,

Wang³

2017

Proceedings of the 6th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (COM

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“…Few researchers used soil with cohesion as the embankment fill. For example, Miao et al (2013) used a cement-treated sand-expanded polystyrene (EPS) bead lightweight material as an embankment fill. This study introduced an 'apparent cohesion' for the embankment fill to illustrate the influence of embankment fill properties on soil arching and tensioned membrane effects.…”

Section: Introductionmentioning

confidence: 99%

Scaled model tests on influence factors of full geosynthetic-reinforced pile-supported embankments

Song

Han

2016

Geosynthetics International

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A geosynthetic-reinforced pile-supported (GRPS) embankment that consists of embankment fill, geosynthetic, piles, and foundation soils is a complex soil-structure system. Its key load transfer mechanisms include soil arching and tensioned membrane effects and subsoil resistance. Type of embankment fill (cohesive or cohesionless) and type of pile (end-bearing or floating) are expected to affect these load transfer mechanisms; however, their influence has not been well investigated. Six scaled model tests were conducted in this study to investigate the influence of the embankment fill properties, the clear spacing of pile caps, and the pile type on soil arching and tensioned membrane effects. This study used cohesive and cohesionless embankment fills and end-bearing and floating piles. The test results show that the cohesive embankment fill strengthened the soil-arching effect, increased the pile efficacy, and reduced the settlements of the subsoil between pile caps and the embankment crest under the same load as compared with the cohesionless embankment fill. The soil arching-effect was inversely proportional to the clear spacing of pile caps. Soil arching initiated at a low ratio of the embankment height to the clear spacing of pile caps (i.e. 0.5 to 0.7) and became stable at a higher ratio (i.e. 1.1 to 1.5). The embankment height when the soil arching becomes stable is also referred to as the critical height, at which full soil arching is formed. The measured vertical earth pressures at the edges of the pile caps were higher than those in the middle of the pile caps in all six model tests. When the end-bearing or floating piles were used, the loads on the piles (i.e. the pile efficacy) increased during the construction of the embankment. However, when the floating piles started to penetrate into the underlying soil under a higher load; the pile efficacy decreased with the embankment and the surcharge load. Floating piles resulted in less soil arching and larger settlement.

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“…Various types of lightweight embankment fill materials; such as wood chips (Coulter 1975), expanded polystyrene (EPS) geofoam (geofoam block) (Horvath 1995), wood fibre and foam concrete (Elias et al 2000), foam-mixed soil (Miki et al 2003), tyre shred-sand mixture (Yoon et al 2006), tyre chip-sand mixture (Tanchaisawat et al 2008;Voottipruex et al 2010), tyre-derived aggregate (Staseff and Sangiuliano 2011), cement-treated sand-EPS bead mixture (Miao et al 2013), and air-mixed soil (Kim et al 2013a) have been implemented in embankment construction to remediate settlement problems. Among these lightweight fill materials a geofoam block, which was defined as a closed cellular geosynthetic (Horvath 2004) made from raw polystyrene beads through an expansion and melting process (Lin et al 2010), has high strength-to-density ratio (Elragi 2000).…”

Section: Introductionmentioning

confidence: 99%

Laboratory study on the use of EPS-block geofoam for embankment widening

Özer

2016

Geosynthetics International

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The use of expanded polystyrene geofoam (geofoam block) has been gaining momentum in roadway expansion projects. They are traditionally placed along the slope face of the existing roadway embankment as a side-hill fill. However, previous studies have shown the detrimental effects of seepage forces on the side-hill fill type of geofoam block configurations. In order to improve the performance of traditional embankment-widening configuration under seepage forces, an alternative geofoam block assembly is proposed. For this purpose, a lysimeter with dimensions of 60 cm high, 20 cm wide, and 200 cm long was constructed in the laboratory. A water reservoir located at the end of the lysimeter provided three different constant pressure heads (25 cm-, 38 cm-, and 50 cm-H 2 O pressure) during the tests. An embankment-widening geofoam block assembly was placed along the slope face of marginally stable sandy embankment to investigate the effects of seepage on the stability of geofoam block assembly. The dimensions of the geofoam blocks used to construct the embankment-widening sections were 2.5 cm high, 5 cm wide, and 15 cm long. In addition to the laboratory physical testing, factors of safety against global stability and hydrostatic sliding failures were studied through coupled numerical modelling. Stability modelling comprised fully coupled variably saturated flow and conventional limit equilibrium analysis to quantify the performance of the lysimeter test against global stability failure. Factor of safety against hydrostatic sliding was quantified using fully coupled variably saturated flow and stress-deformation modelling. Both laboratory and numerical models showed that the proposed geofoam block configuration significantly improved the performance of traditional side-hill fill embankment-widening technique under seepage forces.

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Properties and Applications of Cement-Treated Sand-Expanded Polystyrene Bead Lightweight Fill

Cited by 59 publications

References 6 publications

Dynamic Modulus and Damping Ratio of Eps Composite Soil Under Small Strain Condition

Dynamic Modulus and Damping Ratio of Eps Composite Soil Under Small Strain Condition

Scaled model tests on influence factors of full geosynthetic-reinforced pile-supported embankments

Laboratory study on the use of EPS-block geofoam for embankment widening

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