Laboratory Study on the Stability of Large-Size Graded Crushed Stone under Cyclic Rotating Axial Compression

Tan, Bo; Yang, Tao; Qin, Heying; Liu, Qi

doi:10.3390/ma14071584

Cited by 9 publications

(6 citation statements)

References 37 publications

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“…At present, the discrete element method is rarely used to analyze the actual road performance of designed mixture gradations, while the California Bearing Ratio (CBR) is widely used to characterize the quality of subgrade and pavement base materials [21]. Tan Bo et al [22] found that the larger the CBR value of graded, crushed stone specimen, the stronger the performance of the skeleton structure, and the stronger the deformation resistance and bearing capacity. Gao et al [23] found that the larger the CBR value, the greater the shear strength and elastic modulus of the subgrade filler, which does not make it easy to produce settlement deformation.…”

Section: Introductionmentioning

confidence: 99%

Gradation Design of Phosphorus Tailing–Graded Waste Rock Subgrade Filling Using Discrete Element Method

Liu

Li²,

ZHAO

et al. 2022

Minerals

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The method of using silt phosphorus tailing instead of traditional sand and filler as subgrade filling has been suggested to greatly improve the comprehensive utilization of solid waste phosphorus tailing. A suitable combination of phosphorus tailing and graded waste rock can be adopted to improve the stability of the structure of filling, which can then improve the soil properties of phosphorus tailing and prevent the formation of quicksand and landslides. In this research, a discrete element model was established by combining a graded mixing method and the concept of equivalent particle size, and the discontinuous gradation design of a phosphorus tailing–graded waste rock mixture was carried out. Using the filling coefficient, different structural types of mixture composition were verified, and the California Bearing Ratio was used to test and analyze the specimens with different mixtures, grading, and structural type. The results show that the porosity of the main skeleton calculated with the model established using the discrete element software Particle Flow Code and the porosity obtained with the tamping test fit well, with the minimum porosity of the optimal main skeleton coarse aggregate being 30.44%. At the same time, by analyzing the effect of filling the porosity of graded waste rock with different mass fractions of phosphorus tailing and by determining the California Bearing Ratio of the corresponding filling structure, it was shown that the skeleton-dense structure with the best gradation of the mixture displayed better road performance and that the phosphorus tailing–graded waste rock system with improved performance can be used as subgrade filling or in the preparation of pavement base material.

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Section: Introductionmentioning

confidence: 99%

Gradation Design of Phosphorus Tailing–Graded Waste Rock Subgrade Filling Using Discrete Element Method

Liu

Li²,

ZHAO

et al. 2022

Minerals

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“…Six papers used laboratory tests and numerical simulations to assess the performance of different road materials and structures, including emulsified cold recycling asphalt mixtures, self-healing asphalt binder, reactive powder concrete and bridge deck pavement. The findings provide in-depth understandings in terms of various road materials key performance [14][15][16][17][18][19].…”

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confidence: 89%

Experimental Testing and Constitutive Modelling of Pavement Materials

et al. 2023

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“…As a result, conventional GCS is characterized by low strength, high plastic deformation, and a low modulus of resilience [14]. Previous studies have shown that the California bearing ratio (CBR), dynamic modulus of resilience, and permeability of GCS can be significantly increased with an increase in the maximum particle size, which can reduce pavement distress and the cost of pavement maintenance [15,16]. Moreover, the Illinois Department of Transportation has found that the performance of GCS is significantly affected by the gradation design method.…”

Section: Introductionmentioning

confidence: 99%

“…In addition, some related preliminary investigations into the mix design method of the LPS-GCSM have been conducted by researchers. Tan et al proposed a gradation design method based on the skeleton-dense structure of LPS-GCSM, which combined the Talbol theory and the i-method [21]. The passing rate of each sieve for coarse aggregates and fine aggregates was calculated by the Talbol method and i-method, respectively.…”

Section: Introductionmentioning

confidence: 99%

Mix Design and Field Detection of Large-Particle-Size Graded Crushed Stone Mixtures for Pavement Reconstruction

Yi,

Xu,

Pan

et al. 2024

Buildings

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Large-particle-size graded crushed stone mixtures (LPS-GCSMs) can improve the shortcomings of conventional graded crushed stone, such as low strength, high deformation, and a low modulus of resilience. At present, there is no systematic research on the gradation design and field evaluation of the LPS-GCSMs. In this study, compaction and California bearing ratio (CBR) tests and field construction conditions were combined to design six kinds of gradation of LPS-GCSM, and the optimum gradation was revealed. In order to improve the mechanical properties of LPS-GCSM, 2.5% cement was added to the mixture to prepare a low-content cement-modified LPS-GCSM (LCC-LPS-GCSM) based on the suggested gradation. The mechanical properties of the LCC-LPS-GCSM were investigated through unconfined compression strength (UCS) and compression rebound modulus (CRM) tests. Moreover, the compaction and deflection properties of LPS-GCSM and LCC-LPS-GCSM were examined through the test battery. The results showed that the optimum gradation of LPS-GCSM can be achieved with a combination of aggregate sizes of 20–40 mm, 10–20 mm, 5–10 mm, and 0–5 mm at a ratio of 44:20:10:26. The passing rates of 19 mm and 4.75 mm should be approximately at the median value of the gradation in view of field construction uniformity and a coarse aggregate interlocking effect. The UCS and CRM values of LCC-LPS-GCSM increased rapidly from 0 day to 28 days while they slowed after 28 days, which was similar to those of cement-stabilized materials. The field detection suggested that LPS-GCSM exhibited favorable compaction and that the addition of cement improved the stability of the field compaction of the mixture. Adding a subbase course of LPS-GCSM between the old pavement and the LCC-LPS-GCSM base can lead to more uniform stress on the base. The results of this study provide a reference for the gradation design of LPS-GCSM and optimization of the design indicators.

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Laboratory Study on the Stability of Large-Size Graded Crushed Stone under Cyclic Rotating Axial Compression

Cited by 9 publications

References 37 publications

Gradation Design of Phosphorus Tailing–Graded Waste Rock Subgrade Filling Using Discrete Element Method

Gradation Design of Phosphorus Tailing–Graded Waste Rock Subgrade Filling Using Discrete Element Method

Experimental Testing and Constitutive Modelling of Pavement Materials

Mix Design and Field Detection of Large-Particle-Size Graded Crushed Stone Mixtures for Pavement Reconstruction

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