Evaluating the performance of very weak subgrade soils treated/stabilized with cementitious materials for sustainable pavements

Ardah, Allam; Chen, Qiming; Abu-Farsakh, Murad

doi:10.1016/j.trgeo.2017.05.002

Cited by 62 publications

(18 citation statements)

References 15 publications

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“…Previous studies [ 34 , 35 , 36 ] indicate that the deformation caused by the overall rearrangement of the particles generated by the slip in graded crushed stone mixtures was mainly related to their density, gradation characteristics, and voids. Therefore, specimens with a higher density and stronger skeleton structure exhibited smaller slip deformations under the same load.…”

Section: Analysis Of Test Resultsmentioning

confidence: 99%

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

et al. 2021

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In this paper, the stability of large-size graded crushed stone used for road base or cushioning under repeated load is investigated. Using an in-house developed device, large-size crushed stone mix was compacted and molded by the vibration and rotary compaction method. Cyclic rotating axial compression was applied, and the shakedown theory was used to study the cumulative deformation of the large-size crushed stone specimens. The effects of gradation parameters on the cumulative strain and stability behavior were analyzed, and the critical stability and failure loads were determined according to the shakedown theory. The test results indicate that there are three obvious instability behavior stages of large-size graded crushed stone under cyclic rotating axial compression: elastic stability, plastic creep, and incremental plastic failure. Large-size graded crushed stone has a higher critical stability load stiffness than conventional-size graded crushed stone. The critical shakedown load of the specimen is mainly affected by the skeleton structure performance, and the critical failure load by the properties of the crushed stone material. Increasing the content and compactness of large-size crushed stone in the specimen can improve the stiffness and stability performance, and to achieve improvements, the content of large-size crushed stone should be controlled between 22% and 26%. The critical shakedown load increases with the increase in the California bearing ratio (CBR) value, while, on the other hand, the CBR value has little relationship with the critical failure load.

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Section: Analysis Of Test Resultsmentioning

confidence: 99%

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

et al. 2021

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“…In theory, the thickness of elastic half space is un-limited. In reality, only the upper layers of the soils deform (Ardah et al, 2017). In general, the deformations of soil decrease with depth.…”

Section: Introductionmentioning

confidence: 99%

“…If it is impossible to compact, weak upper soils can be replaced and then compacted (Al-Adhadh et al, 2019). As an alternative to the weak soils' replacement, chemical stabilization or soil reinforcement using rigid inclusions (Ardah et al, 2017) can be used. As an additional option for extremely weak soils, the floor slab can be supported on piles (Urbonas et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

The Engineering Method for Unifying Ground Floor Slab Settlements

Urbonas

Sližytė

Šapalas

2021

Engineering Structures and Technologies

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For industrial buildings and logistics centres truck lifts are usually used. Therefore, there are special requirements for flatness tolerance of ground floor. The ground floor settlements differences in selected distances are limited. The article reviews the behaviour of soils and the importance of the actual behaviour assessment of soils during the design of floor slab on elastic subgrade. Particular attention is given to the behaviour of floor slab areas above pile foundations that support the building’s columns. Calculation results show the impact of subgrade stiffness on the behaviour of the floor slab, especially in areas above pile foundations, where the stiffness of subgrade is much higher. The article presents a solution for achieving the required level of settlements’ differences in areas where pile foundations for the building’s columns under the ground slab are used. The paper proposes an efficient engineering method to reduce ground slab settlements differences. The results of performed calculations confirm the efficiency of presented method.

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“…The technique of soil-cement is widely used in engineering works (e.g., foundation treatment [ 1 , 2 ], roadbed improvement [ 3 , 4 , 5 ], soft soil reinforcement [ 6 , 7 , 8 , 9 ], and seepage prevention [ 10 , 11 ]) due to its advantages of low cost, practicality, convenient construction, and low permeability. However, soil-cement tends to shrink during dewatering and expand during watering, which may cause cracks to form.…”

Section: Introductionmentioning

confidence: 99%

The Effects of Fiber Inclusion on the Evolution of Desiccation Cracking in Soil-Cement

Yao

Zhuang

et al. 2021

Materials

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Desiccation cracking frequently occurs in mud, clay, and pavement. Understanding the evolution of desiccation cracking may facilitate the development of techniques to mitigate cracking and even prevent it from developing altogether. In this study, experimental investigations were performed focusing on the effects of fibers on the evolution of desiccation cracking in soil-cement. Varied types of fibers (i.e., jute fiber and polyvinyl alcohol fiber (PVA)) and fiber contents (i.e., 0%, 0.25%, 0.5%, and 1%) were involved. The digital image correlation (DIC) method was employed to capture the evolution and propagation of cracks in the soil-cement specimens when subjected to desiccation. The results show that the presence of fibers imposes significant effects on the crack propagation pattern as well as the area and length of the cracks in the soil-cement during shrinkage. The addition of fibers, however, insignificantly affects the evaporation rate of the specimens. The crack area and crack length of the specimens decreased significantly when more fibers were included. There were no macroscopic cracks observed in the specimens where the fiber content was 1%. The DIC method effectively helped to determine the evolution of displacement and strain field on the specimens’ surface during the drying process. The DIC method is therefore useful for crack monitoring.

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Evaluating the performance of very weak subgrade soils treated/stabilized with cementitious materials for sustainable pavements

Cited by 62 publications

References 15 publications

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

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

The Engineering Method for Unifying Ground Floor Slab Settlements

The Effects of Fiber Inclusion on the Evolution of Desiccation Cracking in Soil-Cement

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