Laboratory Experiments on Soil Stabilization to Enhance Strength Parameters for Road Pavement

Lindh, Per; Lemenkova, Polina

doi:10.2478/ttj-2023-0008

Cited by 7 publications

(3 citation statements)

References 48 publications

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“…According to the study conducted by Andrew 2 , the degradation of carbonates in making Portland cement accounts for about 8% of global anthropogenic carbon dioxide (CO 2 ) emissions. However, in search of an alternative binder, many researchers have recently utilized industrial waste substances, such as rice husk ash, blast furnace slag, and fly ash, to enhance the engineering properties of soils 3 – 7 . Similarly, several researchers studied the importance of using sustainable cementitious materials like calcium sulfoaluminate (CSA) cement for soil improvement instead of OPC 8 – 11 , 32 – 35 .…”

Section: Introductionmentioning

confidence: 99%

Enhancing geomechanical characteristics of calcium sulfoaluminate (CSA) cement-treated soil under low confining pressures

Ocheme,

Kim,

Moon

2024

Sci Rep

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This study examines the efficacy of employing calcium sulfoaluminate (CSA) cement, an environmentally friendly binder, for enhancing the geomechanical characteristics of sand, particularly under low confining pressure conditions. A series of triaxial consolidated drained tests were performed on sand samples treated with varying content (5, 7, and 10%) of CSA cement and 10% ordinary Portland cement (OPC) under various low confining pressures (50, 100, 200, and 400 kPa). The test findings demonstrated the importance of cement content and confining pressure on the mode of failure, stress–strain and volumetric behavior, failure characteristics, and shear strength parameters of the treated quartz sand. After a curing period of 14 days, samples treated with 10% CSA cement exhibited a remarkable 212% increase in peak deviator stress and an 89% reduction in axial strain at failure, indicating higher initial stiffness compared to untreated samples under a 400 kPa confining pressure. Furthermore, the samples treated with 10% CSA exhibited higher peak deviator stress, initial stiffness, and strength development compared to those treated with 10% OPC. The scanning electron microscopy analysis provides insights into particle breakage and bond degradation processes, which increase with confining pressure in CSA-treated samples. Also, the mode of failure analysis reveals a transition from ductile to slightly brittle behavior with increasing cement content. Notably, the geomechanical properties of the treated material emphasized the significant impact of CSA cement on soil improvement. Thus offering a sustainable alternative for soil improvement in construction projects.

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Section: Introductionmentioning

confidence: 99%

Enhancing geomechanical characteristics of calcium sulfoaluminate (CSA) cement-treated soil under low confining pressures

Ocheme,

Kim,

Moon

2024

Sci Rep

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“…For instance, while the existing practices of soil stabilization focused on the design of road constructions and transport engineering [36][37][38][39][40][41][42], our study contributes to these investigations with a special aim at evaluating the effects of blended binders. The use of blended binders such as slag, cement, lime, energy fly ash and bio fly ash enables to increase the quality of soil and thus to improve the road drainage measures in Swedish climate setting.…”

Section: Introductionmentioning

confidence: 99%

Geotechnical Properties of Soil Stabilized with Blended Binders for Sustainable Road Base Applications

Lindh

Lemenkova

2023

Construction Materials

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This study aimed at evaluating the effect of blended binders on the stabilization of clayey soils intended for use as road and pavement materials in selected regions of Sweden. The stabilization potential of blended binders containing five stabilizers (cement, bio fly ash, energy fly ash, slag and lime) was investigated using laboratory tests and statistical analysis. Soil samples were compacted using Swedish Standards on UCS. The specimens were stabilized with blended mixtures containing various ratios of five binders. The effects of changed ratio of binders on soil strength was analyzed using velocities of seismic P-waves penetrating the tested soil samples on the day 14 of the experiment. The difference in the soil surface response indicated variations in strength in the evaluated specimens. We tested combination of blended binders to improve the stabilization of clayey soil. The mix of slag/lime or slag/cement accelerated soil hardening process and gave durable soil product. We noted that pure lime (burnt or quenched) is best suited for the fine-grained soils containing clay minerals. Slag used in this study had a very finely ground structure and had hydraulic properties (hardens under water) without activation. Therefore, slag has a too slow curing process for it to be practical to use in real projects on stabilization of roads. The best performance on soil stabilization was demonstrated by blended binders consisted of lime / fly ash / cement which considerably improved the geotechnical properties and workability of soil and increased its strength. We conclude that bearing capacities of soil intended for road construction can be significantly improved by stabilization using mixed binders, compared to pure binders (cement).

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“…nevertheless, the main challenge of the geotechnical works consists of the complexity of soil as a study object, owing to its different types and the variety of practical applications. This is particularly relevant for engineering cases that involve transportation infrastructure, including the construction of roads, highways, tunnels or building foundations [32][33][34]. With this regard, it becomes clear that no standard universal solution exists, and the soil specimens should be tested individually in each project case.…”

Section: Introductionmentioning

confidence: 99%

Behaviour of Moraine Soils Stabilised with OPC, GGBFS and Hydrated Lime

2023

Archives of Mining Sciences

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Behaviour of Moraine SoilS StaBiliSed with oPC, GGBfS and hydrated liMeThis paper aims to evaluate the effects of blended binders on the development of strength in moraine soils by optimising the proportion of several binders. We tested three types of soil as a mixture of moraine soils: A (sandy clay), B (clayey silt) and C (silty clay), collected in southern Sweden. The soil was compacted using a modified Proctor test using the standard SS-En 13286-2:2010 to determine optimum moisture content. The particle size distribution was analysed to determine suitable binders. The specimens of types A, B and C, were treated by six different binders: ordinary Portland cement (oPC); hydrated lime (Ca(oh) 2 ); ground granulated blast furnace slag (GGBFS) and their blends in various proportions. The strength gain in soil treated by binders was evaluated by the test for Unconfined Compressive Strength (UCS) against curing time. For soil type A, the strength increase is comparable for most of the binders, with the difference in behaviour in the UCS gain. The oPC/lime, GGBFS and hydrated lime showed a direct correlation, while oPC, oPC/GGBFS and GGBFS/hydrated lime -a quick gain in the UCS by day 28 th . After that, the rate of growth decreased. Compared to soil type A, Ca(oh) 2 performs better on the stabilisation of soil type B. Besides, the hydrated lime works better on the gain of the UCS compared to other binders. The GGBFS/Ca(oh) 2 blend shows a notable effect on soil type A: the UCS of soil treated by Ca(oh) 2 performs similarly to those treated by oPC with visible effects on day 90 th . Cement and a blend of slag/hydrated lime demonstrated the best results for soil type B. An effective interaction was noted for the blends GGBFS and hydrated lime, which is reflected in the UCS development in soils type A and B. Blended binder GGBFS/hydrated lime performs better compared to single binders.

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Laboratory Experiments on Soil Stabilization to Enhance Strength Parameters for Road Pavement

Cited by 7 publications

References 48 publications

Enhancing geomechanical characteristics of calcium sulfoaluminate (CSA) cement-treated soil under low confining pressures

Enhancing geomechanical characteristics of calcium sulfoaluminate (CSA) cement-treated soil under low confining pressures

Geotechnical Properties of Soil Stabilized with Blended Binders for Sustainable Road Base Applications

Behaviour of Moraine Soils Stabilised with OPC, GGBFS and Hydrated Lime

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