Mechanical performance and optimization of high-volume fly ash concrete containing plastic wastes and graphene nanoplatelets using response surface methodology

Transforming Conventional Construction Binders and Grouts into High-Performance Nanocarbon Binders and Grouts for Today’s Constructions

“…The effect of the addition of 0.22% GNP on bending strength from 28 days to 180 days of water curing was measured as a 40.7% increment for the 100% CEM I 32.5N mortar composite, a 23.5% increment for the 100% white cement mortar composite, a 23% increase for the 100% gypsum mortar composite, and a 40% increase for the 100% CEM I 32.5N mortar composite. These increments are in line with other research in which GNP caused a higher bending strength in zirconium [7,45], ultrahigh performance concrete [49], self-consolidating cementitious systems [8], concrete with E-waste plastic coarse aggregate [9], geopolymers [10], electrically conductive cementitious composites [11], concrete incorporating an iron-particle contained nanographite byproduct [12], and other construction binder-based materials [13][14][15][16][17]. Additionally, the highest bending strength of the mortar composites was observed with the addition of 0.22% GNP, which is also in line with other existing results demonstrating better bending strength properties in high-performance cementitious composites with GNP addition The addition of GNP increased the 28d bending strength from 1.4, 1.5, 1.7, and 0.1 MPa to 2.7, 3.4, 2.6, and 0.5 MPa for the Portland cement mortar, white cement mortar, gypsum mortar, and lime mortar, respectively.…”

“…This will reduce the extension of internal microcracks and improve the field among the cement paste and gravel pile [4,6,7]. Various construction materials have used GNP as an addition in the production of self-consolidating cementitious systems [8], concrete with E-waste plastic coarse aggregates [9], geopolymers [10], electrically conductive cementitious composites [11], concrete incorporating nanographite by-products (ING) [12], cement reinforcement [13], and high-volume fly ash concrete containing graphene nanoplatelets [14]. The presence of GNP results in an improvement in both the microstructural and mechanical properties.…”

Conversion of Plastic Waste into Supports for Nanostructured Heterogeneous Catalysts: Application in Environmental Remediation

“…The use of plastic waste as a starting source to produce value-added products and/or materials has been proposed as the necessary impetus to increase the attractiveness of plastic recycling [237]. When plastic waste is transformed into these new products, there are many essential factors that need to be considered, as the addition of plastic waste can affect the performance of the composite materials produced [238]. In particular, the scientific community has focused on suggesting alternatives for the inclusion of plastic waste in various sectors, such as construction materials [238][239][240][241][242], ultrafiltration membranes for water treatment [243][244][245], 3D printing [246][247][248][249], components in asphalt [250][251][252][253], wallpaper [254], and the agricultural sector [255], among others, as shown in Figure 3.…”

“…Through the aforementioned investigations, many advantages of these new composites generated from polymeric waste can be observed, such as obtaining valueadded products, which can be applied in various sectors [289]. It is important to mention that, here, we focus on the approach of composites filled with metallic nanoparticles and nanostructured oxides; however, composites from plastic waste mixed with other filling materials are also reported, such as layered silicates [4], graphene [238], and POSS [256]. It is worth mentioning that, in addition to the applications mentioned above for the destination of polymeric waste, these wastes have also been investigated as catalytic supports, ensuring quality in environmental systems.…”

Bond to Bar Reinforcement of PET-Modified Concrete Containing Natural or Recycled Coarse Aggregates

“…Ferreira et al [14] reported that concrete containing high waste plastic volume exhibits better performance when a mixed curing environment (i.e., air and wet) is employed, due to a better bond between the plastic and cement paste. Adamu et al [15] conducted an experimental study on the effect of plastic waste and graphene nanoparticles on the properties of high-volume fly ash concrete. The incorporation of plastic wastes led to an improvement in workability, whereas the workability was curtailed in the presence of graphene nanoparticles.…”