Use of GRP Pipe Waste Powder as a Filler Replacement in Hot-Mix Asphalt

Abstract

There is an increasing global trend to find sustainable, environmentally friendly and cost-effective materials as an alternative to limited natural raw materials. Similarly, the use of waste materials has been gaining popularity in the production of hot-mix asphalt (HMA). In this study, the sustainable use of glass-fiber-reinforced polyester (GRP) pipe waste powder (GRP-WP), gathered from the cutting and milling process of GRP pipe production, utilizing it in asphalt mixes as a filler, is evaluated based on lab testing to find out: (i) if it produces similar or better performance compared to the most conventionally available filler material (limestone) and, (ii) if so, what would be the optimum GRP-WP filler content to be used in asphalt mixes. For this reason, an experimental test matrix consisting of 45 samples with three different amounts of binder content (4%, 4.5% and 5.0%), and a 5% filler content with five different percentages of the GRP-WP content (0%, 25%, 50%, 75% and 100% replacement by weight of the filler), was prepared to figure out which sample would produce the similar Marshall stability and flow values compared to the control samples while also satisfying specification limits. It was found that the samples with 4.5% binder content, 3.75% GRP-WP and 1.25% limestone filler content produced the results both satisfying the specification requirements and providing an optimum mix design. It is believed that use of GRP-WP waste in HMA production would be a very useful way of recycling GRP-WP.

Assessment of glass fiber-reinforced polyester pipe powder in soil improvement

“…Owing to the micro-CGFs, we focused on improving soil performance using the PP as a substitutional material. Likewise, using PP in engineering materials has also gained the attention of other researchers [41,42].…”

Development of unsaturated polyester/fiber glass composites with foundry sand

“…The use of residues is a promising approach to control the composition of composites. Beycioğlu et al [13] recently reported the use of fly ash as a filler in fiberglass-reinforced polyester composite tubes. The authors observed that fly ash could be an interesting substitute for sand as a filler in composites and that the evaluated formulations met the regulatory standards.…”

Effects of glass fiber reinforced polymer pipe waste powder usage on concrete properties

“…However, in recent years, it has become widespread with the researchers' investigation on the reusability of both natural components of concrete and various industrial by-products or substances that are harmful to human health and disrupt the environment and natural balance. Studies on using waste powder or waste materials as filler material in concrete after being pulverized have shown a positive effect on the properties of concrete such as compressive strength, tensile strength, reduction of void ratio, and workability regulation (Aydin & Saribiyik, 2013;Beycioğlu et al, 2020;Bisht & Ramana, 2018;Corinaldesi el al., 2005;De Castro & De Brito, 2013;Erek et al, 2002;Evram et al, 2020;Khodabakhshian et al, 2018;Xiao et al, 2020). For instance, in the study by Bhushan et al (2019), it was emphasized that a concrete mixture containing 18% glass powder and 40% marble dust can be used effectively in structures designed for compressive strength (Bhushan et al, 2019).…”

“…Therefore, various levels of waste material arise during the production process of FRP composites and when they complete their service life in sectors such as construction, aviation, and automobile. Many researches have been done on the recycling of FRP waste materials and their disposal by using them in different materials (Asokan et al, 2010(Asokan et al, , 2009Bağriaçik et al, 2021;Bağrıaçık et al, 2020;Beycioğlu et al, 2020;Cestari et al, 2018;Clark et al, 2020;Dehghan et al, 2017;Farinha, de Brito, & Veiga, 2019;Osmani & Pappu, 2010;Özüyaǧli et al, 2016;Ribeiro et al, 2013;Saikia & De Brito, 2012). For example, in the review study on the use of plastic waste materials in concrete, it was stated that plastic affects the workability depending on the geometry of the aggregate, and the compressive strength value of the concrete decreases as the amount of plastic increases (Saikia & De Brito, 2012).…”