Phase separation and thermal degradation of plastic bag waste modified bitumen during high temperature storage

Waste plastics in asphalt concrete: A review

“…In fact, waste plastic bags (usually a mixture of LDPE and LLDPE) have been shown to phase separate from the binder into a separate layer at HMA mix temperatures with no agitation. [21] Plastics commonly found in post-consumer waste do not have any affinity for the aggregate and are not preferentially adsorbed on the aggregate surface. As stated previously, the interface between the polymer particles and the highly viscous asphalt is weak and is considered the source of the generally poor properties in measurements sensitive to the interface as will be described below.…”

Variation of internal structure and performance of polyethylene‐ and polypropylene‐modified bitumen during blending process

“…Given the relatively low melting temperatures (<170°C) and high thermal stability, these materials well fit in the production protocols of MBs from a practical point of view 2,3 . Even though some phase stability issues have emerged, 3,28,42–45,50–56 these modifiers seem to improve the mechanical properties of the bitumen 2…”

“…Given the relatively low melting temperatures (<170 C) and high thermal stability, these materials well fit in the production protocols of MBs from a practical point of view. 2,3 Even though some phase stability issues have emerged, 3,28,[42][43][44][45][50][51][52][53][54][55][56] these modifiers seem to improve the mechanical properties of the bitumen. 2 Despite the considerable number of publications on this topic, many aspects of PEMBs and PPMBs remain unclear or even undisclosed.…”

Fatigue cracking characterisations of waste-derived bitumen based on crack length

“…Meanwhile, in the UK there are nearly 8 million tonnes of household waste plastics and municipal solid waste (MSW) almost unrecycled and typically landfilled or incinerated each year. One of the most promising methods to recycle a certain portion of these wastes is to use them as construction materials for transport infrastructures [7,8]. Regarding the waste plastics, laboratory experiments show that incorporating waste plastics (by 5~10wt.%) into asphalt mixture can effectively enhance its stability [9], strength [10], and durability [11].…”

“…Regarding the waste plastics, laboratory experiments show that incorporating waste plastics (by 5~10wt.%) into asphalt mixture can effectively enhance its stability [9], strength [10], and durability [11]. At present, there are mainly two options for recycling waste plastics in asphalt mixture, namely, the dry way to replace fine aggregate [12] and the wet way to serve as a binder modifier [8]. In terms of the MSW, originally collected from households and then processed at Material Recovery Facilities for recovering recyclable materials, the main components are decomposed food, papers, textiles, plastics, wood, and some inert materials.…”