Analysis of the stiffness and damping characteristics of compacted sand-in-fines granular composites: a multiscale investigation

Shafiee, Ali; Hassanipour, Akbar; Payan, Meghdad; Tajani, Shahla Bahmani; Chenari, Reza Jamshidi

doi:10.1007/s10035-022-01247-1

Cited by 9 publications

(2 citation statements)

References 66 publications

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“…The amplitude is the maximum value of the corresponding event signal waveform, which characterizes the type of AE signal waveform and the intensity of AE event activity, which is represented by Equation (5). max () 20 lg 1…”

Section: Ae Testmentioning

confidence: 99%

“…The northeast region is a typical seasonal frozen zone, subgrade soil in this region inevitably experienced short-term or even continuous high-frequency freeze-thaw (F-T) cycles. As a common subgrade filler in northwest of Jilin Province, silty sand has the characteristics of low natural water content, small plasticity index and low shear strength [4], which is easy to cause road diseases such as subgrade deformation, road surface ruts and congestion subjected to F-T cycles [5][6][7]. Therefore, improving the silty sand to obtain subgrade filler with good mechanical properties and strong F-T resistance is significant, which not only can effectively reduce the occurrence of road frost damage, extend the service time of subgrade, but also can reduce the cost of road maintenance and repair.…”

Section: Introductionmentioning

confidence: 99%

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Mechanical properties and acoustic emission characteristics of basalt fiber reinforced cemented silty sand subjected to freeze-thaw cycles

Sun,

Liu,

Liu

et al. 2024

Preprint

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Freeze-thaw (F-T) cycling was a crucial issue in seasonal frozen zones and it will significantly influence the mechanical properties of soil, which must be strictly considered for subgrade engineering. Therefore, a series of unconfined compression test was conducted to analyze the effects of multiple factors i.e., fiber content, fiber length, curing time and F-T cycles on unconfined compression strength (UCS), as well as find the optimal ratio of fiber reinforced cemented silty sand. Meanwhile, based on the optimal ratio, AE test was adopt to further evaluate the AE characteristic parameters (i.e. cumulative ring count and cumulative energy, energy, amplitude, RA and AF) of fiber reinforced cemented silty sand subjected to F-T cycles, to reveal the F-T damage process. The results showed that the UCS first increased and then decreased with the increase of fiber content, increased with the increase of curing time, decreased with the increase of fiber length and F-T cycles, and stabilized after 6 ~ 10 cycles.. The optimal ratio was 0.2% fiber content, 12 mm fiber length and 14 days of curing. Moreover, AE characteristic parameters had a great correlation with the damage stages. The F-T damage could be divided into three stages by cumulative ring count and cumulative energy. The sudden change in AE amplitude symbolized the transformation of damage stage. The amplitude of 67 dB after 6 F-T cycles could be used as an early failure warning.

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Section: Ae Testmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%