A Disaster Resilient Road: Effects of Fines on Density and Shear Strength of Sands

Shahin, Md.; Khan, Md. Mehedi Hasan; Bari, Md. Niamul

doi:10.11648/j.ijtet.20200602.11

Cited by 6 publications

(2 citation statements)

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“…Very few results are available in the literature on direct shear tests performed on reconstituted sand-clay mixtures in the laboratory [39,42,50,60,73,175,176]. Furthermore, the results do not provide a comprehensive understanding on the mechanical behavior of the sand-clay mixtures even though they clearly indicate that the clay content affects the shear behavior of the mixtures.…”

Section: Interface Direct Shear Tests On Sand-clay Mixturementioning

confidence: 98%

A Review of Sand–Clay Mixture and Soil–Structure Interface Direct Shear Test

et al. 2021

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Natural soils are usually heterogeneous and characterized with complex microstructures. Sand–clay mixtures are often used as simplified soils to investigate the mechanical properties of soils with various compositions (from clayey to sandy soils) in the laboratory. Performing laboratory tests on a sand–clay mixture with definite clay fraction can provide information to understand the simplified soils’ mechanical behavior and better predict natural soils’ behavior at the engineering scale. This paper reviews previous investigations on sand–clay mixture and soil–structure interface direct shear test. It finds that even though there are many investigations on sand–clay mixtures and soil–structure interfaces that consider pure sand or pure clay, limited data on the mechanical behavior of the interface between sand–clay mixture and structure materials are available. Knowledge is missing on how the clay content influences the mechanical behavior of interface and how the soil particles’ arrangement changes as the clay content increases. Further study should be performed to investigate the interface in terms of a reconstituted sand–clay mixture and structure by interface direct shear test, to highlight the influence of clay fraction on the interface response, under various loading conditions.

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Section: Interface Direct Shear Tests On Sand-clay Mixturementioning

confidence: 98%

A Review of Sand–Clay Mixture and Soil–Structure Interface Direct Shear Test

et al. 2021

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“…For a fine content greater than 60 percent, the shear strength of the mixtures is equivalent to that of pure clay [41]. In these cases (i.e., fine content > 60%), the decrease in fine content (i.e., the increase in sand-size particle fraction) results in an increase in the internal friction angle [42,43]. Tsubakihara et al [44] reported similar effects of particle size on the shear strength of the soil-steel interface.…”

Section: Effects Of Cement Content On Shear Strength and Interface Sh...mentioning

confidence: 99%

Interface Shear Strength Behavior of Cement-Treated Soil under Consolidated Drained Conditions

Nguyen

et al. 2023

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This paper presents a series of laboratory tests to determine the shear strength and interface shear strength of cement-treated silty soil under consolidated and drained conditions. The test variables include the effective normal stress, cement content, and curing period. Experimental results indicated that the effective shear strength and interface shear strength of cement-treated soil specimens increased significantly as the cement content increased. After 28 days, the average shear strength ratio increased from 1.28 to 2.4, and the average interface efficiency factor improved from 1.15 to 1.55 as the cement content increased from 3% to 10%. It resulted from an increase in grain size and the fraction of sand-sized particles in the treated soils, approximately in two-time increments for the specimens treated with 10% cement content after 28 days of curing. In addition, the peak and residual values of the shear strength and interface shear strength of the cement-treated soil specimens were determined to assess their brittle behavior under high shear deformation. Last, two new empirical models are introduced herein. The first power equation is to predict the shear strength ratio of cement-treated soil at 28 days of curing using the soil-water/cement content ratio. The other proposed model is useful for assessing the rate of shear strength and interface shear development of cement-treated soil specimens within 56 days of curing.

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