The Effect of Polymer-Fiber Stabilization on the Unconfined Compressive Strength and Shear Strength of Sand

Jin, Liu; Feng, Qiao; Wang, Yong; Bai, Yaocai; Wei, Jihong; Song, Zezhuo

doi:10.1155/2017/2370763

Cited by 29 publications

(20 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…To mitigate fracture in the treated surface due to deformation caused by human activity and traffic, we employ a "double-network" design that utilizes milli-/micro-scale polymer network to reinforce the inorganic-cemented soil network with "ductility", inspired from microfiber reinforcement of concretes, where polymer microfibers provide ductility in concrete matrix and sandy soil (Durairaj and Janaki Sundaram, 2015;Liu et al, 2017). These treatments are proven to be capable of transforming matrix bulk characteristics from brittle to malleable, which provide impact dissipation ability and prevent crack or fracture upon external strain.…”

Section: Introductionmentioning

confidence: 99%

Durable and ductile double-network material for dust control

Tirkolaei

Hua

et al. 2020

Geoderma

View full text Add to dashboard Cite

Dust generation is a worldwide issue due to its serious deleterious effects on the environment, human health and safety, and the economy. Although various dust suppression methods have been used for decades, some critical drawbacks in state-of-the-art technology still remain unsolved, such as short-lasting, ground water impact, and prone to water. This work reports a soil stabilizer based on non-toxic material and forms a ductile and durable double-network in soil, namely "D 3 soil stabilizer", which not only improves soil mechanical toughness of surface soil but also suppresses dust generation. A copolymer comprising hydrophilic and hydrophobic components combined with enzyme-induced carbonate precipitation is utilized as an in-situ gelation binder to soil particle. The tunable hydrophobic-to-hydrophilic component ratio minimizes undesirable soil matrix expansion and mechanical strength loss upon experiencing wet-dry processes, while still retains good water affinity. We further demonstrated controllable treatment depth by fine-tuning precursor composition, which is essential to minimize environmental impact. The double-network morphology with carbonate precipitate embedded uniformly in polymer matrix is observed via microscopic imaging. The nature of outstanding ductility, high durability against water, and good long-term stability were supported by systematic unconfined compressive strength (UCS) measurements on treated soil, which show strong inter-particles binding, good retention of peak strength, increased strain at peak strength, and increased toughness after soil samples have experienced wet-dry processes.

show abstract

Section: Introductionmentioning

confidence: 99%

Durable and ductile double-network material for dust control

Tirkolaei

Hua

et al. 2020

Geoderma

View full text Add to dashboard Cite

show abstract

“…The test results revealed that in both direct shear test and triaxial tests, the addition of fibers improved shear strength parameters and also limited the amount of post-peak reduction in shear resistance. Eldesouky et al [10], Wei Shao et al [11] and Jin Liu et al [12] studied the effects of reinforcement on strength behavior of sand. The results showed that the fiber inclusion improved the shear strength and dilation.…”

Section: Introductionmentioning

confidence: 99%

Effect of Polypropylene Fiber on Shear Strength Parameters of Sand

Darvishi¹,

Erken²

2018

World Congress on Civil, Structural, and Environmental Engineering

View full text Add to dashboard Cite

The principle of reinforced soil with fiber can be defined as a soil layer mass which includes randomly distributed discrete components, i.e. fibers, that supply on improvement in the engineering properties and mechanical behavior of the soil matrix. In this study, the effect of fiber reinforcement on shear strength parameters of sand was evaluated. In order to determine the shear strength parameters of unreinforced and reinforced sand specimen, the direct shear test was conducted. While the type of sand and fiber is kept constant, the effect of various percentages of polypropylene fiber on shear strength parameters of sand was tested in the laboratory. The main aim is to find the influence of fiber inclusion on the shear strength of dense sand specimens. For the experimental stud y of the research, polypropylene fiber with different percentage of 0.1%, 0.5% and 1.0% by weight of soil was used and the effect of fiber reinforcement on shear strength parameters of sand was investigated. The experimental study mainly consists of direct shear tests that are conducted unreinforced and reinforced sand samples prepared at a relative density of 65%. The results indicate that fiber mixtures can improve the shear strength of sand. The experimental results reveal fiber inclusion affected the strength parameters of sand and both angles of internal friction and cohesion displayed a significant improvement with an increase in fiber content in the soil matrix. Based on the experimental results, the effect of homopolymer polypropylene fiber on shear strength parameters of dry, dense and poorly graded quartz sand was analyzed.

show abstract

“…The mixture of the polymer and water had the capability to enwrap the bentonite-sand particles and could result in a more compact structure. As the polymer content increased, the polymer amount mixed with water also increased and this mixture blocked the voids among the bentonite-sand particles [4]. This interlocking effect that could cause stronger bonding in the structure might be the main reason for the increase in the shear strength of the bentonite-sand mixture due to polymer addition.…”

Section: Test Results and Discussionmentioning

confidence: 98%

“…On the other hand, the increase in the cohesion due to the polymer treatment could be attributed to the stronger interaction between the polymer and the bentonite-sand particles when compared with the interaction of the bentonite-sand mixtures [17]. However, the decrease in the internal frictional angle occurred due to a possible formation of smoother surfaces of the sand particles as the polymer was added to the mixture [4].…”

Section: Test Results and Discussionmentioning

confidence: 99%

“…They also added a copolymer (poly methyl methacrylate) with a content of 0.025, 0.05 and 0.1% by mass to the mixtures, respectively and the results showed that cohesion increased and internal friction angle decreased as the polymer content increased. [4] conducted direct shear tests on polyurethane organic polymer-polypropylene fiber-sand mixtures. As a result, both the polymer and the fiber improved the shear strength of the sand.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Measuring shear strength parameters of polymer-added bentonite-sand mixtures in laboratory experiments

Ozhan

2019

E3S Web Conf.

View full text Add to dashboard Cite

In order to evaluate the shear strength parameters of an anionic polymer-added bentonite-sand mixture that was permeated with tap water, Proctor compaction tests and direct shear tests were performed on the mixture with a bentonite content of 15% by mass. The polymer content in the polymer-bentonite mixture was chosen as 0.5, 1, 2, 5, 10, 15 and 20% by mass, respectively. According to the results, maximum dry unit weight (Vdmax) first decreased as the polymer content was increased to 1% and then, increased. Vdmax of 20% polymer-added mixture and the mixture without polymer addition was measured as 17.55 and 17.28 kN/m3, respectively. Test results indicated that cohesion (c) increased and internal friction angle (ø) decreased due to polymer addition. 2% polymer addition caused an increase of 42 kPa in c but a decrease of 4.2° in ø. As the polymer content increased, maximum shear strength of the mixture (τmax) increased. τmax increased from 171.8 to 197.8 kPa as the polymer content was increased from 0 to 2%. As a result, 2% anionic polymer-added bentonite-sand mixture provided sufficient increase in the shear strength of the mixture.

show abstract

The Effect of Polymer-Fiber Stabilization on the Unconfined Compressive Strength and Shear Strength of Sand

Cited by 29 publications

References 15 publications

Durable and ductile double-network material for dust control

Durable and ductile double-network material for dust control

Effect of Polypropylene Fiber on Shear Strength Parameters of Sand

Measuring shear strength parameters of polymer-added bentonite-sand mixtures in laboratory experiments

Contact Info

Product

Resources

About