Modulus-Suction-Moisture Relationship for Compacted Soils in Postcompaction State

Sawangsuriya, Auckpath; Edil, Tuncer B.; Bosscher, Peter J.

doi:10.1061/(asce)gt.1943-5606.0000108

Cited by 118 publications

(52 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Despite being widely used for predicting the performance of fills and for routine investigation of their dynamic properties, a limited number of relationships between the small strain shear modulus (G 0 ) and other compaction properties for unsaturated compacted soil have been established. Recent studies on the small strain behavior of unsaturated soils showed that an increase in matric suction contributes to enhanced stiffness of the soil skeleton which in turn leads to higher values of G 0 (Wu et al, 1984;Cho and Santamarina, 2001;Mancuso et al, 2002;Menzies, 2007, Ng andYung, 2008;Sawangsuriya et al 2009;Asslan and Wuttke (2012) and Biglari and Ashayeri, 2012).…”

Section: Introductionmentioning

confidence: 99%

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

2013

View full text Add to dashboard Cite

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

show abstract

Section: Introductionmentioning

confidence: 99%

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

2013

View full text Add to dashboard Cite

show abstract

“…The influences of ground moisture should be also considered in performance assessment in such a way that the anticipated in-service conditions are taken into account. Sawangsuriya et al (2009b) developed a laboratory method for identifying and examining the variation of modulus with moisture and suction in order to improve the ground performance assessment. Their study evaluated the Go of compacted specimens using bender elements under the suction and moisture variation in the laboratory as shown in Fig.…”

Section: Application Of Wave Propagation Methods For Ground Monitoringmentioning

confidence: 99%

Wave Propagation Methods for Determining Stiffness of Geomaterials

Sawangsuriya¹

2012

Wave Processes in Classical and New Solids

View full text Add to dashboard Cite

“…Based on the results of previous work, the small strain shear modulus for an unsaturated sand is greatly dependent on the effective stress [6,11,12]. While the well-known effective stress-dependency of G max , correlations between the small strain shear modulus and effective stress are not well understood.…”

Section: Characterization Of the G Max Behavior For Sandy Specimensmentioning

confidence: 99%

Characterizing the variation of small strain shear modulus for silt and sand during hydraulic hysteresis

et al. 2016

View full text Add to dashboard Cite

Abstract. Experimental studies have indicated that the small strain shear modulus, Gmax, of unsaturated silt and clay has a greater amount during imbibition than during drainage, when presented as a function of matric suction. However, due to material properties and inter-particle forces, different behavior is expected in the case of sand. Although considerable research has been devoted in recent years to characterize the behaviour of Gmax of sand during drainage, rather less attention has been paid to the effect of hydraulic hysteresis on Gmax and its variations during imbibition. In the study presented herein, an effort has been made to compare the Gmax behavior of specimens of silt and sand during hydraulic hysteresis. In this regard, a series of bender element tests were carried out in a modified triaxial test device with suction-saturation control to evaluate the impact of hydraulic hysteresis on Gmax for specimens of silt and sand. Trends between the Gmax and matric suction for unsaturated sand were found to be different from those for silty specimens. The variations in Gmax showed an up and down trend in both drainage and imbibition paths for sandy specimens, where plotted as a function of matric suction. Results also indicated smaller magnitudes of Gmax upon imbibition than those during drainage; a behavior which is believed to be attributed to variations in suction stress with matric suction. In silty specimens, a stiffer response was measured during imbibition which was hypothesized to be due to drainage-induced hardening experienced by the specimens that was not fully recovered during imbibition.

show abstract

Modulus-Suction-Moisture Relationship for Compacted Soils in Postcompaction State

Cited by 118 publications

References 38 publications

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

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

Wave Propagation Methods for Determining Stiffness of Geomaterials

Characterizing the variation of small strain shear modulus for silt and sand during hydraulic hysteresis

Contact Info

Product

Resources

About