Investigation on the physical, mechanical and microstructural properties of epoxy polymer matrix with crumb rubber and short fibres for composite railway sleepers

Yu, Peng; Ferdous, Wahid; Abousnina, Rajab; Salih, Choman; Heyer, Tom; Schubel, Peter

doi:10.1016/j.conbuildmat.2021.123700

Cited by 45 publications

(19 citation statements)

References 49 publications

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“…The lesser localised cracking observed on the fibre-reinforced beams compared to the control sample (beams without fibres) indicated that the PP fibres redistributed the shear stresses and improved the bridging action between crack faces before failure. Recently, 0–1.5% volume PP fibres were used for composite railway sleepers [ 26 ], and it has been concluded that there was a slight effect on the flow and density of the PFR samples but the porosity gradually increased.…”

Section: Introductionmentioning

confidence: 99%

Mechanical Properties of Macro Polypropylene Fibre-Reinforced Concrete

et al. 2021

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Adding fibers to concrete helps enhance its tensile strength and ductility. Synthetic fibres are preferable to steel ones which suffer from corrosion that reduces their functionality with time. More consideration is given to synthetic fibres as they can be sourced from waste plastics and their incorporation in concrete is considered a new recycling pathway. Thus, this work investigates the potential engineering benefits of a pioneering application using extruded macro polyfibres in concrete. Two different fiber dosages, 4 kg/m3 and 6 kg/m3, were used to investigate their influence based on several physical, mechanical and microstructural tests, including workability, compressive strength, modulus of elasticity, splitting-tensile strength, flexural test, CMOD, pull-out test and porosity. The test results revealed a slight decrease in the workability of the fibre-reinforced concrete, while all the mechanical and microstructural properties were enhanced significantly. It was observed that the compressive, splitting tensile and bonding strength of the concrete with 6 kg/m3 fibre dosage increased by 19.4%, 41.9% and 17.8% compared to the plain concrete specimens, respectively. Although there was no impact of the fibres on the modulus of rupture, they significantly increased the toughness, resulting in a progressive type of failure instead of the sudden and brittle type. Moreover, the macroporosity was reduced by the fibre addition, thus increasing the concrete compressive strength. Finally, simplified empirical formulas were developed to predict the mechanical properties of the concrete with fibre addition. The outcome of this study will help to increase the implementation of the recycled plastic waste in concrete mix design and promote a circular economy in the waste industry.

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Section: Introductionmentioning

confidence: 99%

Mechanical Properties of Macro Polypropylene Fibre-Reinforced Concrete

et al. 2021

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“…Mineral aggregates are the basic raw material used in housing and road construction [ 1 , 2 , 3 , 4 , 5 , 6 ]. In addition to mineral aggregate, other materials can be used in construction as substitute components for the production of building materials [ 7 , 8 , 9 ]. Nevertheless, a constant development of these two industries causes a heavy and still growing demand on rock raw materials.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the Structure and Geometric Properties of Crushed Igneous Rock Aggregates

Strzałkowski¹,

Duchnowska²,

Kaźmierczak³

et al. 2021

Materials

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The aim of this publication is to analyze the influence of rock mineral composition and rock geometric properties on the quality of crushed aggregates, from the perspective of selecting an adequate aggregate production technology. This research is based on samples of crushed aggregates from plants processing igneous rocks from four different igneous deposits. In the case of the geometric properties, shape and flakiness indexes were identified and subsequently analyzed along with particle size distribution. The performed tests allowed a conclusion that the shape of the particle is influenced by the mineral composition and size distribution. The grain size analysis demonstrated that flaky and non-cubical particles concentrate in the finest grain fractions, and the least variable shape index is observed for basalt aggregate. Some problems were also observed to exist in relation to the classification of grain shape. In the literature, the notions of regular and irregular grains seem to be used interchangeably with the notions of flaky and non-flaky grains. The performed tests show that flaky grains do not necessarily have to be non-cubical and vice versa. Therefore, this article proposes an approach in which the applied technique is precisely explained and the shape of grains is described with four notions: cubical, non-cubical, flaky, and non-flaky. The article also finally concludes that the next step in the research on selecting an optimal production technology of high-quality aggregates should be to analyze the selection of the fragmentation process while also characterizing the geometric properties of the aggregates.

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“…The molecular skeleton is aliphatic, alicyclic or aromatic organic compounds and the thermosetting product is formed by the reaction of reactive epoxy group and curing agent, which is a polymer oligomer. Epoxy resin has been widely used in architecture (Huseien et al, 2021;Yu et al, 2021;Papanicolaou and Anastasiou, 2021), coatings (Wang et al, 2021;Li et al, 2021;Fernández-Álvarez et al, 2021), electronics (Kong et al, 2019;Jdidi et al, 2021;Lee et al, 2021), medical treatment (Kumar and Swamy, 2021) and packaging (Parvathy and Sahoo, 2021), due to its advantages of high hardness, insulation, anti-corrosion and high adhesion. There are many types of epoxy resins.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Bisphenol A Polyether Polyols on the Synthesis of Hydrophilic Epoxy Resins

Jiang¹,

Yuan²

2021

American Journal of Biochemistry and Biotechnology

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The article uses three types of Bisphenol A polyether polyols BEO, BPO-6 and BPO-10 as raw materials, reacts with epichlorohydrin under the action of a catalyst and synthesizes a hydrophilic epoxy resin. The molecular structure of the product is analyzed by infrared spectroscopy and the results show that the synthesis of the hydrophilic epoxy resin BEOGE conforms to the results of the experimental design. The research results show that the hydrophilicity, epoxy value, tensile strength and elongation rate of cured product of BEOGE synthesized from BEO are better than those synthesized by BPO-6 and BPO-10 and the hydrophilic-lipophilic balance value of BEOGE is 6.531, which is between epoxy resin and water-based epoxy resin. It facilitates its adsorption at the oil-water interface and meets the synthesis requirements of hydrophilic epoxy resin. When tetra ethylene pen amine is used as the curing agent, the tensile strength and elongation at break of the cured product are tested. The results show that the tensile strength and elongation at break of the cured product of BEOGE are far better than those of BPOGE-6 and BPOGE-10. Among them, the BEOGE cured product has the highest tensile strength value of 0.59 MPa, which is 1.79 times that of BPOGE-6 and 4.92 times that of BPOGE-10. The elongation at break of the cured product of BEOGE is the largest at 9.9%, which is 1.87 times of that of BPOGE-6 and 1.46 times of that of BPOGE-10.

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Investigation on the physical, mechanical and microstructural properties of epoxy polymer matrix with crumb rubber and short fibres for composite railway sleepers

Cited by 45 publications

References 49 publications

Mechanical Properties of Macro Polypropylene Fibre-Reinforced Concrete

Mechanical Properties of Macro Polypropylene Fibre-Reinforced Concrete

Evaluation of the Structure and Geometric Properties of Crushed Igneous Rock Aggregates

The Effect of Bisphenol A Polyether Polyols on the Synthesis of Hydrophilic Epoxy Resins

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