Abstract:Currently, millions of tons of textile waste from the garment and textile industries are generated worldwide each year. As a promising option in terms of sustainability, textile waste fibers could be used as internal reinforcement of cement-based composites by enhancing ductility and decreasing crack propagation. To this end, two extensive experimental programs were carried out, involving the use of either fractions of short random fibers at 6–10% by weight or nonwoven fabrics in 3–7 laminate layers in the tex… Show more
“…As a result of the tension, an increase in the fibers fracture due to pullout occurred, reducing the fibres’ frying. 36 Figure 6.SEM analysis (a) Pristine fractured specimen (b) 0.25 wt.% MWCNT fractured specimen. Note: MWCNT: Multi-wall carbon nanotube; SEM: scanning electron microscope.…”
Section: Resultsmentioning
confidence: 99%
“…As a result of the tension, an increase in the fibers fracture due to pullout occurred, reducing the fibres' frying. 36…”
This work highlights the recycling of waste carpet (Jute) to develop epoxy composites using a modified vacuum-assisted environment. Incorporating Multi-wall carbon nanotube (MWCNT) into the epoxy matrix in different weight percentages improves the physio-mechanical properties. The MWCNT was supplemented at 0.25, 0.5, 0.75, and 1 wt% to investigate the mechanical aspects of composite samples. The nanofiller (MWCNT) dispersion in the epoxy matrix was simulated using X-ray diffraction (XRD) and Energy Dispersive X-Ray Analysis (EDX). The results were compared to the neat (pristine) sample to study the influence of nano-supplement. The Tensile, Flexural, and Impact tests were the selected experiments to assess the material characteristics. The findings show the feasibility of the developed samples for lightweight structural applications such as toy items, wall tiles, roof tiles, sound insulation, and roadside barriers. It could be endorsed as a feasible way to handle the waste issues generated by the carpet and textile sources.
“…As a result of the tension, an increase in the fibers fracture due to pullout occurred, reducing the fibres’ frying. 36 Figure 6.SEM analysis (a) Pristine fractured specimen (b) 0.25 wt.% MWCNT fractured specimen. Note: MWCNT: Multi-wall carbon nanotube; SEM: scanning electron microscope.…”
Section: Resultsmentioning
confidence: 99%
“…As a result of the tension, an increase in the fibers fracture due to pullout occurred, reducing the fibres' frying. 36…”
This work highlights the recycling of waste carpet (Jute) to develop epoxy composites using a modified vacuum-assisted environment. Incorporating Multi-wall carbon nanotube (MWCNT) into the epoxy matrix in different weight percentages improves the physio-mechanical properties. The MWCNT was supplemented at 0.25, 0.5, 0.75, and 1 wt% to investigate the mechanical aspects of composite samples. The nanofiller (MWCNT) dispersion in the epoxy matrix was simulated using X-ray diffraction (XRD) and Energy Dispersive X-Ray Analysis (EDX). The results were compared to the neat (pristine) sample to study the influence of nano-supplement. The Tensile, Flexural, and Impact tests were the selected experiments to assess the material characteristics. The findings show the feasibility of the developed samples for lightweight structural applications such as toy items, wall tiles, roof tiles, sound insulation, and roadside barriers. It could be endorsed as a feasible way to handle the waste issues generated by the carpet and textile sources.
“…Concrete industrial floors must provide a quality surface for production processes and comfortable, safe human activities. At the same time, they are operated under conditions of multidirectional loads and dynamic influences [ 1 , 2 ]. Rigid pavements are operated under similar conditions while additionally being affected by freezing and thawing [ 3 , 4 , 5 ].…”
A comparison of the effect of steel and polypropylene fibers on the strength, frost resistance, abrasion, and corrosion resistance in an acidic environment of fiber-reinforced concrete for industrial floors and road pavements was carried out. Steel fibers with a length of 50 mm and a diameter of 1 mm and polypropylene fibers with a length of 36 mm and a diameter of 0.68 mm were used. The amount of steel fiber varied from 15 to 25 kg/m3, and the amount of polypropylene fiber varied from 2 to 3 kg/m3. It has been established that steel fiber more significantly increases the concrete compressive strength, and both types of dispersed reinforcement increase the flexural strength equally by 27–34%. Also, dispersed reinforcement reduces the concrete abrasion resistance by 15–35% and increases its frost resistance by 50 cycles, which helps to improve the durability of industrial floors and road pavements. The use of steel fiber in an amount of 20 kg/m3 and polypropylene fiber in an amount of 2.5 kg/m3 also increases the concrete corrosion resistance in an acidic environment. In general, dispersed reinforcement with both fiber types has approximately the same technological effect concerning the mentioned applications. However, the use of polypropylene fibers is economically more profitable since an increase in the cost of 1 m3 of concrete with steel fiber reinforcement is from $22.5 to $37.5, and an increase in cost with polypropylene fiber is from $10 to $15.
“…The building sector is one of the leading consumers of energy and natural resources, in addition to being one of the main contributors to CO 2 emissions [ 1 ]. Therefore, producing more environmentally friendly materials obtained with sustainable processes by implementing the circular economy principles could be an interesting proposition, especially for concrete and cementitious materials [ 2 ]. In this context, there have been several recent studies in the literature regarding the use of waste and recycled materials in concrete as artificial aggregates [ 3 , 4 , 5 , 6 ] or fibers [ 7 , 8 , 9 , 10 ]; however, more novel and advanced solutions will still be needed to promote industrial symbiosis.…”
This study aimed to investigate the recycling opportunities for industrial byproducts and their contribution to innovative concrete manufacturing processes. The attention was mainly focused on municipal solid waste incineration fly ash (MSWI-FA) and its employment, after a washing pre-treatment, as the main component in artificially manufactured aggregates containing cement and ground granulated blast furnace slag (GGBFS) in different percentages. The produced aggregates were used to produce lightweight concrete (LWC) containing both artificial aggregates only and artificial aggregates mixed with a relatively small percentage of recycled polyethylene terephthalate (PET) in the sand form. Thereby, the possibility of producing concrete with good mechanical properties and enhanced thermal properties was investigated through effective PET reuse with beneficial impacts on the thermal insulation of structures. Based on the obtained results, the samples containing artificial aggregates had lower compressive strength (up to 30%) but better thermal performance (up to 25%) with respect to the reference sample made from natural aggregates. Moreover, substituting 10% of recycled aggregates with PET led to a greater reduction in resistance while improving the thermal conductivity. This type of concrete could improve the economic and environmental aspects by incorporating industrial wastes—mainly fly ash—thereby lowering the use of cement, which would lead to a reduction in CO2 emissions.
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