The Influence of the Compaction Energy on the SWCC of a Residual Soil

Marinho, Fernando A. M.; Stuermer, Monica Machado

doi:10.1061/40510(287)8

Cited by 31 publications

(14 citation statements)

References 1 publication

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“…The estimated air entry point fairly evolves with the compaction energy, giving a value of 1.1MPa for the modified proctor, and a relatively lower value under 1MPa for the normal proctor. This type of result is corroborated by other studies [9,10] find in the literature. The main difference between the two curves comes from their respective densities.…”

Section: Retention Curvessupporting

confidence: 82%

Hydro-mechanical paths within unsaturated compacted soil framed through water retention surfaces

et al. 2016

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Abstract.Compaction is a key issue of modern earthworks... From sustainable development, a need arise of using materials for compaction under given conditions that would normally be avoid due to unpredictable pathologies. The application of compaction on fine grained soils, without a change of gravimetric water content, lead to very important modifications of the void ratio and hence suction. Therefore the hydro-mechanical behaviour of fine grained soil need to be rendered around three variables: suction, void ratio, saturation degree or water content. The barring capacity of the soil is assessed through Penetrometers (In-situ manual penetrometer, CBR) in order to assess gains through compaction. The three states variables are then assessed for in situ and frame through water retention surfaces, realized from Proctor tests, in which compaction effect and path could be described.

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Section: Retention Curvessupporting

confidence: 82%

Hydro-mechanical paths within unsaturated compacted soil framed through water retention surfaces

et al. 2016

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“…Although the difference in SWRCs obtained for samples compacted on the dry side and at OMC can be explained by invoking the void ratio dependency (Gallipoli et al, 2003), the same cannot be said for the wet side of the OMC that is affected by the change in structure. The same experimental evidence was given for dynamically compacted residual soil tested with different compaction efforts (Marinho and Stuermer, 2000). This highlights that differences in the degree of saturation and suction observed at different compaction states are likely to be independent of the different compaction procedures.…”

Section: Introductionmentioning

confidence: 51%

Laboratory study of small-strain behavior of a compacted silty sand

2013

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Small-strain behavior is a key indicator for assessing the performance of compacted fills. Compaction conditions, i.e., initial moisture content and applied energy, govern compaction effectiveness and thus, the structure and matric suction of compacted soil. This paper presents an experimental study of the small-strain behavior of compacted silty sand prepared with different compaction conditions. Specimens with varying initial moisture contents and compaction energies were tested with bender elements to determine the smallstrain shear modulus (G0), while the post-compaction matric suction was measured using the filter paper method and tensiometer. The experimental data suggest a pronounced relationship between G0 and the degree of saturation (Sr) of the as-compacted soil specimens. X-ray computed tomography (CT) scans were performed to examine structural changes of selected specimens upon compaction. The laboratory results are also examined in light of common end-product specifications, which show that it is beneficial to compact the soil slightly dry of optimum moisture content from the modulus point of view. Abstract: Small strain behavior is a key indicator for assessing the performance of compacted fills. Compaction conditions i.e. initial moisture content and applied energy, govern compaction effectiveness and, thus, the structure and matric suction of compacted soil. This paper presents an experimental study of the small strain behavior of compacted silty sand prepared with different compaction conditions.Specimens with varying initial moisture contents and compaction energies were tested with Bender elements to determine the small strain shear modulus (G 0 ), while the post-compaction matric suction was measured using the filter paper method and tensiometer. The experimental data suggests a pronounced relationship between G 0 and the degree of saturation (S r ) of the as-compacted soil specimens. X-ray computed tomography (CT) scans were performed to examine structural changes of selected specimens upon compaction. The laboratory results are also examined in light of common end-product specifications, which show that it is beneficial to compact the soil slightly dry of optimum moisture content from the modulus point of view.CE Database subject headings: small strain shear modulus, compaction energy, degree of saturation, matric suction.3

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“…Their test results showed that the soil suction of the soil that compacted at the same molding water content increased as the compaction energy increased. However, a different trend was observed by Marinho and Stuermer [14] and Rao and Revanasiddappa [15]. Their test results showed that the soil suction of a residual soil of gneiss was higher when compacted with low energy than with high compaction energy at the same molding water content.…”

Section: Introductionmentioning

confidence: 65%

“…These two clayey soils both have clay fractions of 50%. However, Marinho and Stuermer [14], Rao and Revanasiddappa [15] and Tripathy et al [16] presented reversed test results for residual soils having clay fraction of 45%, 32%, 22%, and 11%. Hence, from the study in the literature the effect of compaction energy on the soil suction for different clayey soils also reverses when clay fraction approaches 50%.…”

Section: Relationship Between As-compacted Soil Suction and Soil Propmentioning

confidence: 95%

Variation of Initial Soil Suction with Compaction Conditions for Clayey Soils

2012

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In this study, the initial soil suction of as-compacted clayey soils was evaluated for various compaction conditions, covering a wide range of compaction energy and molding water content. The soil specimens were prepared by impact compaction under three levels of compaction energy. The filter paper method was used to measure the initial soil suction of as-compacted specimens. Test results indicate that the relationship between the soil suction and the molding water content is bilinear under three different compaction energies. However, the effect of compaction energy on soil suction is different for the soils with different amounts of clay fraction and is elucidated by the macro soil properties. The change of soil suction due to different compaction energies can be predicted by the void ratio and the degree of saturation.

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The Influence of the Compaction Energy on the SWCC of a Residual Soil

Cited by 31 publications

References 1 publication

Hydro-mechanical paths within unsaturated compacted soil framed through water retention surfaces

Hydro-mechanical paths within unsaturated compacted soil framed through water retention surfaces

Laboratory study of small-strain behavior of a compacted silty sand

Variation of Initial Soil Suction with Compaction Conditions for Clayey Soils

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