Influence of deep-cement-mixing column rows on the performance of geosynthetics-reinforced column-supported railway embankment

Zheng, Gang; Xia, Boyang; Zhou, Haizuo; Yu, Xiaozhou; Diao, Yu

doi:10.1016/j.trgeo.2023.101012

Cited by 10 publications

(4 citation statements)

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“…The compressive strength of the specimens was tested with an MTS servo-hydraulic testing machine under a loading of 2.4 kN/s (Figure 4) [23,24]. Compared with the direct flexural strength using standard specimens, the modulus of rupture (fr) was considered to be more suitable for representing the flexural behaviour of concrete under bending-induced flexural stress [11,25,26]. The fr has a substantial size effect.…”

Section: Test Methodsmentioning

confidence: 99%

“…For each bending test, prismoid-shaped specimens (size: 20 mm × 20 mm × 450 mm) were used to obtain the average fr for each mixing composition. These dimensions can Compared with the direct flexural strength using standard specimens, the modulus of rupture (f r ) was considered to be more suitable for representing the flexural behaviour of concrete under bending-induced flexural stress [11,25,26]. The f r has a substantial size effect.…”

Section: Test Methodsmentioning

confidence: 99%

“…For each bending test, prismoid-shaped specimens (size: 20 mm × 20 mm × 450 mm) were used to obtain the average f r for each mixing composition. These dimensions can provide corresponding values of f r for subsequent centrifuge model tests of a model concrete pile at 1:40 scale [26]. Figure 5 shows installation details of the test.…”

Section: Test Methodsmentioning

confidence: 99%

“…provide corresponding values of fr for subsequent centrifuge model tests of a model concrete pile at 1:40 scale [26]. Figure 5 shows installation details of the test.…”

Section: Test Methodsmentioning

confidence: 99%

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Formulation and Performance of Model Concrete in Reduced-Scale Physical Model Tests

Zheng,

Xia,

Zhou

et al. 2023

Materials

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The utility of geotechnical centrifuge tests depends on how correctly they predict the physical and mechanical behaviour of concrete. In this study, a model concrete material that consisted of α-gypsum plaster, fine silica sand, and water was developed. An orthogonal test design was used to evaluate the effect of the mix proportion on the model concrete performance. The physical (i.e., flowability and bleeding rate) and mechanical (i.e., compressive and flexural strength) characteristics were considered as indices. Various mix ratios resulted in remarkable relative contributions to model concrete performance, and each raw material dosage exhibited positive or negative synergy. The water–plaster ratio (W/P) and aggregate–plaster ratio (A/P) strongly influenced the mechanical and physical characteristics, respectively. Multiple linear regression analysis (MLRA) was carried out to determine a forecast model for various small-scale test demands. Finally, the applicability and outlines of the presented forecasting method in proportioning design were evaluated by typical use of model concrete in small-scale model tests.

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Section: Test Methodsmentioning

confidence: 99%

Section: Test Methodsmentioning

confidence: 99%

Section: Test Methodsmentioning

confidence: 99%

“…provide corresponding values of fr for subsequent centrifuge model tests of a model concrete pile at 1:40 scale [26]. Figure 5 shows installation details of the test.…”

Section: Test Methodsmentioning

confidence: 99%

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