Enhancing mechanical performance of waste tire concrete with surface double pre-coating by resin and micro-silica

Ghaleh, Masoud Bakhtiari; Asadi, Payam; Eftekhar, Mohammad Reza

doi:10.1016/j.jobe.2022.104084

Cited by 9 publications

(9 citation statements)

References 39 publications

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“…In this manner, the tire aggregate can help the freshly mixed concrete to achieve a smooth flow (due to less energy required to overcome frictional stress in the matrix), resulting in a higher slump. Furthermore, typically, tire materials have a hydrophobic nature, i.e., they repel water and attract air bubbles on the tire surfaces, which may improve the quantity of air entrained in concrete mixes [38]. This behavior also helps to enhance the workability of concrete by keeping free water in the mix; with a significant amount of entrapped air, it can help improve the inter-particle movements and raise the slump value due to a better ball-bearing effect.…”

Section: Slump and Dry Densitymentioning

confidence: 99%

“…[37]) than the stone aggregate. Additionally, the incorporation of tire aggregate in the concrete mixes increased the incidence of air bubbles [38], thus increasing the porosity of concrete and decreasing its density. As reported earlier, the treated tire contained cement grout, which increased the density of the treated tire aggregate compared to untreated tire aggregate.…”

Section: Slump and Dry Densitymentioning

confidence: 99%

“…In addition, tire aggregates in the concrete mix can dramatically increase air bubbles, resulting in higher porosity and permeability, leading to lower strength in the concrete. Nevertheless, with the surface treatment, the strength increased compared to the untreated samples, as a rough surface or hard layer around the tire aggregate was created, thereby enhancing adhesion between the tire aggregate and the cement matrix [38]. Figure 5 shows the splitting tensile strength results of all concrete mixes at 28 days.…”

Section: Compressive and Split Tensile Strength Of Tire Concretementioning

confidence: 99%

See 2 more Smart Citations

Treated Waste Tire Using Cement Coating as Coarse Aggregate in the Production of Sustainable Green Concrete

Paul

Islam

Mamun

et al. 2023

Eng

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Waste tire rubber is one of the most concerning environmental pollution issues. With the increasing demand for automobile production, the rate of waste tire generation has also increased. However, these tires often end up stockpiled and not properly disposed of. This non-biodegradable waste poses severe fire, environmental, and health risks. Due to the progressively severe environmental problems caused by the disposal of waste tires, the feasibility of using such elastic waste materials as an alternative to natural aggregates has become a research topic. The main objective of this research is to investigate the changes in the mechanical and durability properties of concrete with the inclusion of waste tire rubber at specific contents. A total of 80 cylinders measuring 100 mm × 200 mm were cast with waste tire aggregate as a partial replacement for natural coarse aggregate (5% and 10% by weight of natural coarse aggregate). A surface treatment of tire aggregate using a cement coating was performed to study its effect on concrete properties. This research indicates a noticeable reduction in the compressive and split tensile strength of concrete containing untreated waste tire rubber compared to normal concrete made with natural aggregates. However, an improvement was observed when the surface of tire aggregates was coated with cement grout. Additionally, it was noted that the slump value, water absorption, and porosity increased as the percentage of rubber increased. Nevertheless, unlike normal concrete, the failure pattern in tire-mixed concrete occurs gently and uniformly, indicating ductile behavior.

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Section: Slump and Dry Densitymentioning

confidence: 99%

Section: Slump and Dry Densitymentioning

confidence: 99%

Section: Compressive and Split Tensile Strength Of Tire Concretementioning

confidence: 99%

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Treated Waste Tire Using Cement Coating as Coarse Aggregate in the Production of Sustainable Green Concrete

Paul

Islam

Mamun

et al. 2023

Eng

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“…In many cases, rubber was mixed with epoxy resin for the purpose of enhancing the hardness of the aggregate [66,67]; in other cases, polyester resins were used to supplement rubber from ELTs in the preparation of mortars in order to modify their mechanical properties in construction applications [68]. In the construction industry, the possibility of integrating silica particles into the mixture of rubber and resin was also tested, in order to improve the performance of cement products based on the use of rubber from ELTs [69]; on the other hand, polyurethane resins were frequently used with rubber from ELTs for the production of panels and pads with high sound-absorbing properties [61,70]. Among the various binders applicable with rubber, polyurethane resins were the ones that best testified to the possibility of bringing flexibility and softness characteristics to the end product [71].…”

Section: Introductionmentioning

confidence: 99%

Mats Made from Recycled Tyre Rubber and Polyurethane for Improving Growth Performance in Buffalo Farms

Masiello,

di Cicco,

Spagnuolo

et al. 2024

AgriEngineering

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This study focuses on anti-trauma mats designed for buffaloes’ comfort, using as raw materials rubber powder from end-of-life tyres (ELTs) and an isocyanate-based polyurethane resin binder. The first part of the study focused on mat formulation. Whilst it was possible to select a unique combination of raw materials and design features, it was necessary to investigate the relationship between three critical parameters affecting mat consistency and therefore buffalo comfort: binder quantity, mat thickness, and desired final mat density (bulk). In order to quantitatively assess the variation in hardness, various combinations were investigated within well-defined ranges based on the relevant literature. The results obtained from nine selected combinations indicate that increases in the three critical parameters do not induce a real phase transition in the final product consistency, although the hardness suggests an increasing trend. The mats consistently exhibited a moderately soft/hard consistency, offering environmental benefits in terms of increased rubber usage and potentially reduced chemical binder, depending on the desired thickness. The selected mixture showed excellent resistance to heavy chemical loads, suggesting reliability for frequent cleaning operations. The second part of the study involved field trials of the mats with calves. This involved monitoring their weight gain and appetite levels over a 90-day period. The results showed excellent growth performance compared to uncoated grids (i.e., weight gain was approximately 20% higher at the end of the observation period); this was similar to that achieved with the use of straw bedding. However, compared to straw bedding, the mats (i) exhibit long-term durability, with no signs of wear from washing or trampling over the months of the trial, (ii) allow for quick and efficient cleaning, and (iii) enable companies to save on labour, material (straw), and waste disposal costs, while maintaining (or even improving) the same welfare levels associated with the use of straw.

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“…More recently, new coatings and treatments are being developed. Abbas et al [11] used beeswax emulsion to coat vegetal fibers, Bakhtiari Ghaleh et al [12] coated the fibers with resin and micro-silica and Veloso de Carvalho et al [13] coated curaua fibers with polyaniline and magnetite to improve the interphase with the cement matrix. Zhao et al [14] coated sisal fibers with graphene oxide to mitigate the degradation process.…”

Section: Introductionmentioning

confidence: 99%

Vegetal-FRCM Failure under Partial Interaction Mechanism

et al. 2022

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FRCM is a strengthening system based on composite material made of a cementitious matrix and fabrics. This strengthening system has been studied and researched, obtaining analytical predictive models where it is common to assume full composite action between components. Through using non-typical materials for these composites, it has been seen that, in some cases, the previous assumption cannot be taken. In this situation, traditional analytical models such as ACK or tri-linear ones do not offer a reasonable prediction. This work researches the behavior of synthetic and naturally coated vegetal-FRCM with partial interaction through the characterization of the materials through tensile tests. Yarns, meshes and different FRCM coupons were manufactured and mechanically tested using different types of coatings and fabrics. The use of colophony and Arabic gum as natural coatings provided similar mechanical properties to the cotton and hemp yarns and meshes conformed. Partial interaction was found when using epoxy as a natural resin to coat the reinforcement while maintaining the mechanical properties in the same order of magnitude. A new two-stage model is proposed to fit stress–strain mechanical test, and it is reliable and accurate for cotton specimens.

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Enhancing mechanical performance of waste tire concrete with surface double pre-coating by resin and micro-silica

Cited by 9 publications

References 39 publications

Treated Waste Tire Using Cement Coating as Coarse Aggregate in the Production of Sustainable Green Concrete

Treated Waste Tire Using Cement Coating as Coarse Aggregate in the Production of Sustainable Green Concrete

Mats Made from Recycled Tyre Rubber and Polyurethane for Improving Growth Performance in Buffalo Farms

Vegetal-FRCM Failure under Partial Interaction Mechanism

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