Effect Of Synthetic Fibers Research Articles

Effect of synthetic fibers on the mechanical performance of asphalt mixture: A review

Effect of synthetic fibers on the mechanical performance of asphalt mixture: A review

Effects of Synthetic Fibers on the Mechanical Properties and Thickness Requirements of Roller-Compacted Concrete for Pavements

Effects of Synthetic Fibers on the Mechanical Properties and Thickness Requirements of Roller-Compacted Concrete for Pavements

Effect of synthetic fibers on resisting scour caused by horizontal jet

Given that the development of scour downstream of hydraulic structures increases the risk of structural damage, it is important to find cost-effective and environmental approaches to reduce this risk. This study aimed to experimentally evaluate the effect of synthetic fibers on the scour profile downstream of a sluice gate with a rigid apron. Experiments were performed with the same Froude number and with different weight percentages of synthetic fibers on both non-cohesive and cohesive sediments. One uniform sand was used as the non-cohesive sediment, and three different cohesive sediments were prepared by mixing different percentages of kaolinite soil with the used sand. The scouring experiments showed that the presence of synthetic fibers did not considerably affect the scour hole dimension in non-cohesive sediments. Evaluation of the scour in the cohesive sediments in silty sand (SM) texture found that an increase in the percentage of silt reduced the scour hole dimensions. The effect of synthetic fibers on scour of SM-texture-based sediments was also investigated, and the results showed that increasing the percentage of synthetic fibers decreased the scour hole dimensions. In addition, the cohesive sediments in SM texture did not have a similar non-dimensional scour profile, and the presence of synthetic fibers did not significantly affect the scour hole.

Are We Underestimating Anthropogenic Microfiber Pollution? A Critical Review of Occurrence, Methods, and Reporting

Anthropogenic microfibers, a ubiquitous environmental contaminant, can be categorized as synthetic, semisynthetic, or natural according to material of origin and production process. Although natural fibers, such as cotton and wool, originated from natural sources, they often contain chemical additives, including colorants (e.g., dyes, pigments) and finishes (e.g., flame retardants, antimicrobial agents, ultraviolet light stabilizers). These additives are applied to textiles during production to give textiles desired properties like enhanced durability. Anthropogenically modified "natural" and semisynthetic fibers are sufficiently persistent to undergo long-range transport and accumulate in the environment, where they are ingested by biota. Although most research and communication on microfibers have focused on the sources, pathways, and effects of synthetic fibers in the environment, natural and semisynthetic fibers warrant further investigation because of their abundance. Because of the challenges in enumerating and identifying natural and semisynthetic fibers in environmental samples and the focus on microplastic or synthetic fibers, reports of anthropogenic microfibers in the environment may be underestimated. In this critical review, we 1) report that natural and semisynthetic microfibers are abundant, 2) highlight that some environmental compartments are relatively understudied in the microfiber literature, and 3) report which methods are suitable to enumerate and characterize the full suite of anthropogenic microfibers. We then use these findings to 4) recommend best practices to assess the abundance of anthropogenic microfibers in the environment, including natural and semisynthetic fibers. By focusing exclusively on synthetic fibers in the environment, we are neglecting a major component of anthropogenic microfiber pollution. Environ Toxicol Chem 2022;41:822-837. © 2021 SETAC.

Effect of synthetic fibers on the properties of geopolymers based on non-heat treated phosphate mine tailing

In this paper, the use of synthetic fibers as reinforcement of geopolymer matrix produced from phosphate mine tailings was investigated. Non-heat-treated phosphate sludge (PS) was mixed with metakaolin (MK) in a ratio of 50% by weight, then blended with the alkaline activator to produce the geopolymer slurry; after that, the fibers (polypropylene (PPF) and glass fibers (GF)) was added in quantities of 0.25, 0.50, 1 and 1.5%. The effect of the incorporated amount and fiber type on the geopolymer matrix in terms of fresh and handed state properties, such as workability, microstructure, morphology, flexural properties, and bulk density on the geopolymer composite was studied. The results indicate that the geopolymer composites’ flexural strength increases with increasing the amount of the fibers, it was also found that the inclusion of a maximum amount of 1% of polypropylene and glass fibers increased the flexural strength of the geopolymer composite by 278% and 26%, respectively. Besides, the addition of PPF leads to a highly ductile composite and provides a better fracture mode compared to GF. While, the partially and/or unreacted PS particles prevent the geopolymer composite from the considerable decrease of apparent density (slight loss of 5%), resulting from a reinforcing role as well. Microstructural analysis of the geopolymer composite shows a compact microstructure and an acceptable interfacial bond of the fibers with the geopolymeric binder. The current research findings indicate that PS-based geopolymers can reach high ductility with the appropriate reinforcement material. volume.

Effects of Synthetic Fibers and Different Levels of Partial Cement Replacement on Mechanical Properties of UHPFRC

AbstractThis paper presents the results of an experimental study conducted to investigate the effects of polypropylene fibers and synthetic macrofibers (barchip) with different partial cement repla...

Effect of Synthetic Fibers and Hydrated Lime in Porous Asphalt Mixture Using Multi-Criteria Decision-Making Techniques.

Porous asphalt is a type of mixture characterized by having high air void percentages that offers multiple benefits when used in wearing courses in terms of driving safety, water flow management, and noise reduction. However, the durability of porous asphalt (PA) mixtures is significantly shorter when compared to dense-graded asphalt mixtures. This study investigated the impact of polyolefin–aramid fibers and hydrated lime in the functional and mechanical performance of porous asphalt mixtures. A parametric study based on the concept of design of experiments was carried out through the Taguchi methodology. Accordingly, an experimental design was conducted based on the L18 full factorial orthogonal array. Three control factors—fiber content, binder content, and filler type—were included at various levels, and multiple responses including total air voids, interconnected air voids, particle loss in dry conditions, particle loss in wet conditions, and binder drainage were assessed experimentally. Signal-to-noise ratios were calculated to determine the optimal solution levels for each control factor for the multiple responses. In the second phase of the research, multi-criteria decision-making techniques—namely, criteria importance through inter-criteria correlation and weighted aggregated sum product assessment—were used to transform the multiple-response optimization problem into a single-unique optimization problem and to elaborate a preference ranking among all the mixture designs. The most significant levels for acquiring the optimum overall response value were found to be 0.05% for fiber content and 5.00% for binder content and mixed filler with hydrated lime.

Effect of Synthetic Fibers and Aggregate Size on Flexural Crack Widths

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Effect of Synthetic Fibers on Shear Capacity of Reinforced Rubberized Concrete Beams

Effect of Synthetic Fibers on Shear Capacity of Reinforced Rubberized Concrete Beams

The Influence of Concrete Strength on the Effect of Synthetic Fibres on Fire Resistance

Numerous studies have verified that increased concrete strength reduces its resistance to fire, leads to a higher degree of strength reduction and higher chances of spalling of concrete surfaces.The risks of spalling of concrete surfaces can be reduced by adding synthetic polypropylene fibres. Numerous experiments have shown that the risk of spalling of the concrete surface is significantly lower when using short, small diameter fibres of polypropylene synthetic, because the pore structure created by the burning of fibres reduces the risk of cracking.However, the question arises whether other types of fibres of greater diameter and length are still able to prevent spalling of concrete surfaces without drastically reducing the strength and if so, in what range of concrete strength it is true.The experiments are aimed to determine the effects of micro and macro synthetic fibres on the post-fire residual compressive strength, flexural strength and porosity of concrete.Nine kinds of mixture were prepared and tested. Three of them are without fibers (reference concretes) with diverse strength, three with synthetic micro-fibres with diverse strength and three with synthetic macro-fibres of diverse strength. The experiment was conducted with three concretes with different strength. Each type had a reference concrete without fibre reinforcement, one with micro- and one with macro-fibres.

Protective effect of synthetic fibers with tourmaline on collagen-induced arthritis in rats

Objective To investigate the protective effect of synthetic fibers with tourmaline on collagen-induced arthritis in rats.Methods Wistar rats were randomly divided into three groups,namely,the control(n = 5),model(n = 12),and protected(n = 13) groups.Rheumatoid arthritis(RA) was induced by immunization with typeⅡcollagen in Freund’s incomplete adjuvant in model group and protected group.Animals in model group were protected by conventional synthetic fibers and those in protected group were protected by the synthetic fibers with tourmaline.The protective effects were evaluated by comparing the appearance,volume(water drainage method),and pathological changes of rat paws in different groups.Results Rats in model group exhibited more severe arthrocele than those in the protected group,and there was even arthrentasis.Histological analysis showed that the model group had more severe pathological changes in both left and right hindpaws than the protected group.Since the second week,the mean volumes of left hindpaws of protected group were smaller than those of model group,with the differences at week 2,6,8,10,and 12 being significantly different(P0.05).The protected group also had a lower incidence of RA than the model group.Conclusion Synthetic fibers with tourmaline have protective effect against collagen Ⅱ-induced arthritis in rats.

Effect of Synthetic Fibers on Structural Behavior of Concrete Slabs-on-Ground

This article studies whether newly developed synthetic macrofiber can enhance the strength properties of plain and fiber-reinforced concrete slabs-on-ground. The structural behavior of fiber-reinforced concrete slabs under interior and edge loading conditions were tested. The results of the load testing showed that the failure behavior of plain concrete slabs was significantly modified with the addition of synthetic fibers, but that the synthetic fibers did not change the tensile cracking load of the plain concrete slab. Strain gauges embedded in the concrete slabs indicated the fibers distributed the load-carrying capacity throughout the slab volume, increasing the concrete slab flexural and ultimate capacities.

Effect of Synthetic Fibers on the Absorption Properties of Pads

Absorption and retention capacity of a mixture of wood pulp, superabsorbent and synthetic fibers (polypropylene, polyamide and polyester), designed for production of the core for disposable pads, were studied. The measurement of absorbency was carried out in the broad range of component weight ratios in a solution NaCl at different lengths of time both with and without pressure. The insertion of the synthetic fibers into the mixture of wood pulp and superabsorbent influences on the physical structure of this assembly which in turn causes the initial rate of absorption to rise. Absorptive and retention capacity of the structures is influenced by the type of synthetic fiber: in the presence of polypropylene no change was detected; the presence of polyester and polyamide fibers caused an increase in absorption ability of the composite structure. The behavior of the components for the absorbing layer: cellulose, synthetic fibers and superabsorbent was found to be independent, i.e. they do not influence the absorption of liquid of one another in these tests. The content of the mixture with definite properties may be predicted according to the properties of its components.

Effect of Synthetic Fibers on Volume Stability and Cracking of Portland Cement Concrete and Mortar

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