Journal ArticleDOI
Preparing Test Specimens Using Undercompaction
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TLDR
In this paper, an improved method of preparing reconstituted sand specimens for cyclic triaxial testing has been proposed, which can be used for compacting most types of sands having a wide range in relative densities and permits determination of the optimum cyclic strength of a given sand at a given dry unit weight.Abstract:
A specimen preparation procedure is presented that offers an improved method of preparing reconstituted sand specimens for cyclic triaxial testing. The method leads to more consistent and repeatable test results. This procedure (1) minimizes particle segregation, (2) can be used for compacting most types of sands having a wide range in relative densities, and (3) permits determination of the optimum cyclic strength of a given sand at a given dry unit weight.read more
Citations
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Journal ArticleDOI
Static Response of Sands Reinforced with Randomly Distributed Fibers
Mohamad H. Maher,Donald H. Gray +1 more
TL;DR: In this article, a model based on a statistical theory of strength for composites was developed to predict the fiber contribution to strength under static loads, which significantly increase the ultimate strength and stiffness of sands.
ReportDOI
Prediction of pore water pressure buildup and liquefaction of sands during earthquakes by the cyclic strain method
Abstract: A cyclic strain approach for evaluating the buildup of excess pore water pressures and the potential for liquefaction of level sandy sites during earthquakes Is proposed In this report. This strain approach Is based on the premise that, for undralned loading of sand, there Is a predictable correlation between cyclic shear strain and excess pore water pressure; also, that there Is a threshold shear strain below which there Is no sliding at the contacts between sand particles and no pore water pressure buildup can occur. As the result, a sand deposit will not develop excess pore pressures If the Induced seismic shear strain Is less than the threshold strain. Both theoretical evidence and experimental verification supporting the cyclic strain approach and the existence of the threshold, are presented In the report. Based on all these findings, a specific design method is proposed for predicting if excess pore pressures will develop at a specific site during a design earthquake.
Journal ArticleDOI
Effects of nonplastic fines on the liquefaction resistance of sands
TL;DR: In this article, a laboratory parametric study utilizing cyclic triaxial tests was performed to clarify the effects of nonplastic fines on the liquefaction susceptibility of sands.
Journal ArticleDOI
Influence of fiber and cement addition on behavior of sandy soil
TL;DR: In this paper, the effect of randomly distributed fiber reinforcement and cement inclusion on the response of a sandy soil to load was evaluated and it was shown that the fiber reinforcement increases both he peak and residual triaxial strength, decreases stiffness, and changes the cemented soils brittle behavior to a more ductile one.
Journal ArticleDOI
Engineering Behavior of a Sand Reinforced with Plastic Waste
Nilo Cesar Consoli,Julio Portella Montardo,Pedro Domingos Marques Prietto,Giovana Savitri Pasa +3 more
TL;DR: In this article, the benefit of using randomly distributed polyethylene terephthalate fiber, obtained from recycling waste plastic bottles, alone or combined with rapid hardening Portland cement to improve the engineering behavior of a uniform fine sand was evaluated.
References
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Journal ArticleDOI
Sand Liquefaction in Triaxial and Simple Shear Tests
TL;DR: In this paper, it was shown that the important variable controlling the incidence of liquefaction in a given number of cycles in a saturated sand at a particular void ratio is the initial effective stress ratio; the ratio of the peak alternating shear stress to the average effective mean normal stress.
Journal ArticleDOI
Dynamic Strength of Anisotropically Consolidated Sand
Kenneth L. Lee,H. Bolton Seed +1 more
TL;DR: In this paper, a large number of such tests were performed on laboratory samples of saturated sands and a compacted silt, and the results indicated that the strength under pulsating loading increased with increasing density and increasing confining pressure.