Effects of reinforcement on mechanical behaviour of cement treated sand using direct shear and triaxial tests

Malidarreh, N. R.; Shooshpasha, Issa; Mirhosseini, Seyed Mohammad; Dehestani, Mehdi

doi:10.1080/19386362.2017.1298300

Cited by 25 publications

(5 citation statements)

References 32 publications

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“…Other examples are the use of recycled plastic materials with anti-erosion functions, e.g. sands reinforced with PET or PP fibres (Malidarreh et al., 2017) or micronized PET as an additive for asphalts (Silva et al., 2017).…”

Section: Main Textmentioning

confidence: 99%

Resource or waste? A perspective of plastics degradation in soil with a focus on end-of-life options

Scalenghe

2018

Heliyon

109

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‘Capable-of-being-shaped’ synthetic compounds are prevailing today over horn, bone, leather, wood, stone, metal, glass, or ceramic in products that were previously left to natural materials. Plastic is, in fact, economical, simple, adaptable, and waterproof. Also, it is durable and resilient to natural degradation (although microbial species capable of degrading plastics do exist). In becoming a waste, plastic accumulation adversely affects ecosystems. The majority of plastic debris pollutes waters, accumulating in oceans. And, the behaviour and the quantity of plastic, which has become waste, are rather well documented in the water, in fact. This review collects existing information on plastics in the soil, paying particular attention to both their degradation and possible re-uses. The use of plastics in agriculture is also considered. The discussion is organised according to their resin type and the identification codes used in recycling programs. In addition, options for post-consumer plastics are considered. Acknowledged indicators do not exist, and future study they will have to identify viable and shared methods to measure the presence and the degradation of individual polymers in soils.

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Section: Main Textmentioning

confidence: 99%

Resource or waste? A perspective of plastics degradation in soil with a focus on end-of-life options

Scalenghe

2018

Heliyon

109

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“…When the results were examined, polypropylene fiber with the same content gave more strength to the treated floor due to its good flexible structure and strength properties compared to other fibers. Malidarreh et al [49] reported that the better interconnection properties of polypropylene fiber also contribute to the ductility gain. In addition, the superiority of macromesh fiber-reinforced samples compared to glass and basalt fiber-reinforced samples is due to the higher surface roughness.…”

Section: The Effect Of Different Fiber Additives On Soil Behaviormentioning

confidence: 99%

The Effect of Different Fiber Reinforcement on Bearing Capacity under Strip Foundation on the Sand Soil: An Experimental Investigation

Aksu Alcan,

Çelik

2023

Applied Sciences

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The aim of this study is to investigate the bearing capacity-settlement behavior of strip footing settling on sand soil randomly reinforced with glass fiber, basalt fiber, macromesh fiber, and four different hybrid fiber additives in which these fibers are used together. Model tests were carried out in the laboratory on the strip footing and placed on the unreinforced and reinforced sand with different fibers. In the study, model tests were carried out on seven types of randomly reinforced soils by using glass, basalt, macrame, and mixtures of these fibers as reinforcement. In the model tests, two different fiber contents, 1% and 2%, and two different fiber lengths, 24 mm and 48 mm, were used. Tests were carried out with Dr = 30% and 50% relative density, and reinforcement depths 1B, 2B, and 3B were selected. In addition, the photographs taken during the test were analyzed with the particle image velocimetry (PIV) method and the displacements on the soil were examined. As a result of the reinforced and unreinforced model tests, the highest ultimate bearing capacity was measured as 680 kPa from the tests with Dr = 50% relative density, 48 mm length, 2% contents, and 3B depth macromesh fiber reinforced. In hybrid fibers, the highest ultimate bearing capacity was measured as 495 kPa, with Dr = 50% relative density, 48 mm length, 2% contents, and 2D depth micromesh and basalt fiber-reinforced tests. In the reinforced tests, it was concluded that the most effective fiber on bearing capacity is macromesh fiber. It can be seen that in the PIV analysis, as the fiber additive increased, the settlements made by the foundation decreased under the same pressure. It has also been observed that adding reinforcement to the soil transfers the stresses occurring in the soil to a wider area.

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“…By increasing the fiber content, the ultimate bearing capacity improved, and settlements of the footing rested on the fiber-reinforced sand decreased [12]. Addition of fiber to the cement-stabilized soils led to improving the soil strength parameters and also increases the ductility of the samples which is one of the main criteria for flexiblety [13]. Resistance to tensile strength is one of the important weaknesses of the soil.…”

Section: Introductionmentioning

confidence: 99%

Effect of Freezing and Thawing on the Strength and Durability of Sandy Subgrade Containing Fibrillating Network Fiber for Pavement

Khabiri

Ebrahimialavijeh

2020

CEJ

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One of the challenges of road construction is encountering soils with lack of required strength and durability. Nowadays, various stabilization techniques are applicable for improving the engineering properties of soils. In the present study, dune sand, as subgrade of pavements, was treated using various contents of fibrillating network (FN) fiber and cement. Dune sand has low bearing capacity that makes it unsuitable for construction activities such as pavement applications. The common solution is improving the strength properties of dune sand so that it can be used for civil engineering projects. Stability of subgrade is very important since the layer provides the stability for the whole pavement structure and the upper layers, namely subbase, base, and asphalt layers. In this regard, compression strength and California bearing ratio (CBR) tests were carried out. Freezing-thawing cycle is one of the most important factors affecting the mechanical properties of soils. Several researchers reported that freezing-thawing cycle could change the physical and mechanical behaviours of soils. The influence of freezing and thawing (up to 18 cycles) on the properties of samples was also studied. Based on the results, the inclusion of FN-fiber to the sand led to increasing the ductility and compressive strength. Also, the addition of cement reduced the ductility, and increased the compressive strength. By increasing the freezing-thawing cycles, the soil strength significantly decreased. Results showed that the stabilized sand soil as subgrade layer led to reducing the compressive strain under the applied wheel load, and therefore reduced the possibility of rutting failure of subgrade.

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Effects of reinforcement on mechanical behaviour of cement treated sand using direct shear and triaxial tests

Cited by 25 publications

References 32 publications

Resource or waste? A perspective of plastics degradation in soil with a focus on end-of-life options

Resource or waste? A perspective of plastics degradation in soil with a focus on end-of-life options

The Effect of Different Fiber Reinforcement on Bearing Capacity under Strip Foundation on the Sand Soil: An Experimental Investigation

Effect of Freezing and Thawing on the Strength and Durability of Sandy Subgrade Containing Fibrillating Network Fiber for Pavement

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