Considerations on the Benefits of Using Recyclable Materials for Road Construction

Abstract

RezumatO problemă actuală a economiei mondiale o constituie atât gestionarea responsabilă a resurselor neregenerabile ale planetei cât și gestionarea numeroaselor deșeuri rezultate în urma a diverse activități economice. Beneficiile aduse de utilizarea materialelor reciclabile împreună cu tehnologiile de reciclare a mixturilor asfaltice constau în principal în reducerea consumului de combustibil și a emisiilor de gaze cu efect de seră. Este un lucru bine știut că petrolul (din care se obține bitumul) este o resursă neregenerabilă, de unde și prețul său tot mai ridicat. De aceea, la ora actuală, pe plan mondial se caută soluții care să conducă la o buna utilizare a resurselor naturale, dar și de integrare în circuitul economic al unor subproduse din diverse industrii. Această lucrare dorește să aducă în prim plan soluțiile de reciclare a mixturilor asfaltice, precum și materialele reciclabile care pot fi folosite ca adaosuri, împreună cu beneficiile fiecăruia.Cuvinte cheie: reciclare, încălzire globală, zgură, pudreta de cauciuc, plastic Abstract A current worldwide economy problem includes both the responsible management of the planet's non-renewable resources and the waste management. The benefits of using recyclable materials and recycling technologies with asphalt mixtures consist mainly of reducing fuel consumption and greenhouse gas emissions. It is well known that oil (from which bitumen is obtained) is a non-renewable resource, hence the its price increase. Therefore, at present, the world is looking for solutions that will lead to a better use of natural resources and to an economic integration of sub-products from various industries. This paper intends to raise awareness of the possibilities for asphalt mixtures recycling and of the recyclable materials that can be used as additives with benefits of each.

Increasing Sustainability in Auckland Road Construction by Using Plastic Waste

“…Pollution of the air and water by microplastics was another issue that 60% respondents raised. Both worries have been supported by research studies (Popescu and Burlacu 2017;Awasthi, Shivashankar, and Majumder 2017). But the respondents were optimistic about available solutions despite their worries.…”

“…Consequentially, roading companies achieve higher sustainability in the use of PW. Nevertheless, Popescu and Burlacu (2017) argue that toxic sulphur fumes and greenhouse gases are emitted during the construction process, causing environment pollution, and PW also releases chlorine gas, which is unhealthy for on-site workers. Similarly, according to Awasthi, Shivashankar, and Majumder (2017), pollution continues after construction also, due to microplastics released in the air and flowing into water.…”

The Influence of Blast Furnace Slag on Cement Concrete Road by Microstructure Characterization and Assessment of Physical-Mechanical Resistances at 150/480 Days

“…A sustainable source for substituting natural aggregates in road concrete is air-cooled crushed blast furnace slag (ACBFS) [50,51]. There are research studies related to the use of blast furnace slag as a substitute for natural aggregates in asphalt mixtures leading to these conclusions [52]. The Japanese Guide using blast furnace slag aggregates for concrete structures recommends using fine aggregates mixed with natural fine aggregates at a ratio between 20 and 60% [53].…”

A Laboratory Investigation Regarding Storage Stability of the CRM-Modified Bitumen—CRM Processing Method (Untreated vs. Treated)

“…ELTs are always an environmental concern as they are non-biodegradable and pose a fire hazard. One of the techniques to recycle end-of-life tires is in the form of crumb rubber mixed with pure asphalt binders, and more than 30 countries around the world have combined the application of these crumb rubber-modified asphalt (CRMA) binders to prepare for both the airport and highway pavement [4][5][6][7][8][9][10][11]. In general, asphalt consists of the correlation of three-dimensional polar molecules [12].…”