Analysis of Greenhouse Gas Emissions and the Environmental Impact of the Production of Asphalt Mixes Modified with Recycled Materials
| Autor: | Carla Aguilar-Vidal, Osvaldo Muñoz-Cáceres, Manuel Lagos-Varas, D. Movilla-Quesada, A.C. Raposeiras, Valerio C. Andrés-Valeri |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Geography
Planning and Development 0211 other engineering and technologies TJ807-830 02 engineering and technology 010501 environmental sciences Management Monitoring Policy and Law TD194-195 01 natural sciences environmental impact Methane Industrial waste Renewable energy sources Copper slag chemistry.chemical_compound greenhouse gas emission industrial by-product waste GE1-350 021108 energy Cellulose 0105 earth and related environmental sciences asphalt mixes Environmental effects of industries and plants Renewable Energy Sustainability and the Environment Pulp and paper industry Environmental sciences chemistry Asphalt Greenhouse gas Carbon dioxide Environmental science Carbon monoxide |
| Zdroj: | Sustainability, Vol 13, Iss 8081, p 8081 (2021) Sustainability Volume 13 Issue 14 |
| ISSN: | 2071-1050 |
| Popis: | This research focuses on the production and construction stages of the life cycle analysis (LCA) of asphalt mixtures modified with industrial waste and by-products, based on the quantification of methane (CH4), carbon monoxide (CO) and carbon dioxide (CO2) emissions produced during these processes. A laboratory-designed and calibrated gas measurement system with a microcontroller and MQ sensors is used to compare the emissions (GHG) of a “conventional” asphalt mix with those emitted by waste-modified asphalt mixes (polyethylene terephthalate and nylon fibres) and industrial by-products (copper slag and cellulose ash). The results obtained show that the gases emitted by each type of material can influence the design criteria from an environmental perspective. Methane gas emissions for asphalt mixes made with polymeric materials increase compared to the production phase of a conventional mix (M1) by 21% for PET and 14% for nylon. In contrast, for mixtures made with copper slag and cellulose ash, this emission is reduced by 12%. In addition, the use of copper slag and cellulose ash to replace natural aggregates reduces greenhouse gas emissions by 15% during the production phase and contributes to the creation of photochemical ozone for a shorter period of time. Regarding carbon dioxide emission, it increases considerably for all asphalt mixes, by 26% and 44.5% for cellulose ash and copper slag, respectively. For asphalt mixtures made of polymeric materials, the increase in carbon dioxide emission is significant, 130% for PET and 53% for nylon. In addition, it is noted that for this type of material, not only the emission of the gas must be taken into consideration, but also the time that the volatile particles spend in the atmosphere, affecting climate change and photochemical ozone (smog). The carbon monoxide gases emitted in the production phase of all the asphalt mixes analysed is similar among them. |
| Databáze: | OpenAIRE |
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