Recycling of Polymeric Composite Materials

Sabău, Emilia

doi:10.5772/intechopen.81281

Cited by 9 publications

(4 citation statements)

References 16 publications

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“…Composite 2 is comprised of 30% ground GFRP waste, 35% sand (up to 0.3 mm in size), and 35% polyester resin. The constituent percent represents a weight fraction ratio of constituents [26]. Norpol 440-M750 polyester resin was used, mixed with 1% methyl ethyl ketone peroxide (MEK-P).…”

Section: Polymer Concrete Composite Constituents and Manufacturing Mementioning

confidence: 99%

A Novel Polymer Concrete Composite with GFRP Waste: Applications, Morphology, and Porosity Characterization

et al. 2020

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Composite materials reinforced with recycled fibers gather a great deal of interest with regards to construction applications. A novel polymer concrete composite was proposed, comprised of a surface layer and a structural composite reinforced with recycled glass fibers. The novel multi-material composite included a large amount of glass-fiber-reinforced polymer (GFRP) waste (30%), which is expected to help protect the environment. Large panels comprised of this polymer concrete composite, which reproduce the appearance of natural stone, were manufactured. A new methodology for porosity analysis of a large panel comprised of a multi-material composite was proposed, utilizing three-dimensional (3D) X-ray computed tomography (CT). The volume of pores was distributed between the constituent composite materials and then statistically analyzed. Homogeneous distribution of the pores within the novel multi-material composite was found. The observed mean porosities of the composite panel were 0.146% for the surface layer material and 31.3% for the structural composite material. The mean density of the panel, determined by the CT density method, was 1.73 g/cm 3 . The composite materials porosity provides a favorable effect for achieving lightweight structures. Using scanning electron microscopy (SEM) analysis, it was observed that a good connection interface between the constituent composite materials existed. possible recycling solutions regarding waste management of composite based products. At present, the main conventional recycling techniques for glass-fiber-reinforced polymer (GFRP) waste materials include incineration, thermal or chemical recycling, and mechanical recycling [1][2][3]. Mechanical recycling through grinding and milling processes is one of the most used techniques; additionally, due to the size reduction of the fibrous products, the recycling process itself does not contribute to atmospheric pollution and much simpler equipment is required as compared to other methods. From this process, the resulting fibers can then be incorporated into new composite materials.Within the construction field, polymeric composite materials are widely used (e.g., polymeric concrete composites), in which many industrial waste materials can be used as aggregates. One of the most commonly used aggregates for polymeric concretes is glass, which can be utilized in many different ways: glass fibers [4], glass dust, and inorganic waste in the form of coarse aggregates [5]. Polymer concretes produced with recycled materials and polyester resins provide aesthetic and structural benefits, as shown in a number of research studies [6,7]. GFRP waste materials incorporated into a polymer matrix are already used within many building materials, having the potential to reduce the environmental footprint of the materials used. Additional constituents of particulates in the polymeric matrix can be in the form of silica sand, calcium carbonate, mica, white cement, gypsum, perlite, or others [8,9]. The use of these materials enables the produ...

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Section: Polymer Concrete Composite Constituents and Manufacturing Mementioning

confidence: 99%

A Novel Polymer Concrete Composite with GFRP Waste: Applications, Morphology, and Porosity Characterization

et al. 2020

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“…The second mixtures of structural CM, polyester matrix, quartz sand, and grinded glass fiber waste were mixed for 10 min in order to achieve homogenization of components. The materials were cast over the first layer and maintained in the mold until polymerization [ 44 , 45 ]. The mixing of the materials was performed at 20 °C in the laboratory condition.…”

Section: Methodsmentioning

confidence: 99%

Evaluation of Novel Ornamental Cladding Resistance, Comprised of GFRP Waste and Polyester Binder, within an Acid Environment

et al. 2021

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The paper presents the manufacturing technology for a material obtained from glass fiber waste, quartz sand, and polyester binder, used for ornamental building plates. The composite has a cover surface that ensures protection of the material from environment attacks and a structural material that can be subjected to chemical degradation. The mechanical properties of the obtained material were experimentally investigated through compressive mechanical tests. To observe the material’s behavior in contact with external agents (rain or acid rain, due to environmental pollution), analyses were performed in laboratory conditions. An investigation on the effects of chemical attack substances was conducted. SEM and macroscopic analyses were performed, and the surface roughness was determined for each sample area. The obtained results were statistically analyzed and showed that there is no significant difference between the surface roughness for treated and untreated samples. Furthermore, the surfaces were analyzed by X-ray diffraction and mineralogical optical microscopy in polarized light with crossed nicols. It was observed that rainwater does not affect the plate structure even if the plates are used in high-pollution environments. The material is suitable for exterior building walls from the point of view of chemical attack and resistance.

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“…The aggregates are generally crushed granite and silica sand. Mineral casting can be recycled by grinding and mixing with new resin and aggregates, minimizing its environmental impact [2]. Its main advantages for these applications are stiffness, yield strength and ultimate tensile strength.…”

Section: Introductionmentioning

confidence: 99%

Method and program for the interpolation of experimental results of determining the mechanical properties of mineral composites for modern machine–tools

2019

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The paper presents a method of interpolating bifactorial experimental data with the aim of extending the results over the entire domain defined by the independent variables. This approach can be used in determining the optimum mineral casting mixes for a given application. Mechanical properties such as stiffness, ultimate tensile strength, yield strength and Poisson's coefficient can be improved.The paper describes the implementation of a radial basis function (RBF) algorithm in a MATLAB program for the interpolation of data, plotting of the results and the identification of the maximum dependent variable and the independent variables that correspond to it. It also provides the source code for the program along with explanations regarding its use. RBF interpolations can be used successfully in response surface methodology to generate approximations of the studied variables based on the experimental results. The program can be extended to work on any number of input and output variables.

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Recycling of Polymeric Composite Materials

Cited by 9 publications

References 16 publications

A Novel Polymer Concrete Composite with GFRP Waste: Applications, Morphology, and Porosity Characterization

A Novel Polymer Concrete Composite with GFRP Waste: Applications, Morphology, and Porosity Characterization

Evaluation of Novel Ornamental Cladding Resistance, Comprised of GFRP Waste and Polyester Binder, within an Acid Environment

Method and program for the interpolation of experimental results of determining the mechanical properties of mineral composites for modern machine–tools

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