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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.
Diana Movilla-Quesada; Manuel Lagos-Varas; Aitor Raposeiras; Osvaldo Muñoz-Cáceres; Valerio Andrés-Valeri; Carla Aguilar-Vidal. Analysis of Greenhouse Gas Emissions and the Environmental Impact of the Production of Asphalt Mixes Modified with Recycled Materials. Sustainability 2021, 13, 8081 .
AMA StyleDiana Movilla-Quesada, Manuel Lagos-Varas, Aitor Raposeiras, Osvaldo Muñoz-Cáceres, Valerio Andrés-Valeri, Carla Aguilar-Vidal. Analysis of Greenhouse Gas Emissions and the Environmental Impact of the Production of Asphalt Mixes Modified with Recycled Materials. Sustainability. 2021; 13 (14):8081.
Chicago/Turabian StyleDiana Movilla-Quesada; Manuel Lagos-Varas; Aitor Raposeiras; Osvaldo Muñoz-Cáceres; Valerio Andrés-Valeri; Carla Aguilar-Vidal. 2021. "Analysis of Greenhouse Gas Emissions and the Environmental Impact of the Production of Asphalt Mixes Modified with Recycled Materials." Sustainability 13, no. 14: 8081.
Chile is the first Latin American country to begin an “ecological overdraft”, as established by the Global Footprint Network (GFN). This implies that the country’s ecological footprint has exceeded the global average bio-capacity. The consumption of natural aggregates for construction in Chile has grown by around 6.6% in the last year, with around 120 million tons being extracted. Given the above, it is important to seek alternatives that help to minimize the problem of resource scarcity, as well as the recovery of industrial by-products and/or waste. The Chilean forestry sector has also grown in recent years, generating approximately 4000 metric tons of waste in 2018, which was deposited in landfills or disposed of on forest roads. The present research is focused on the reuse and possible recovery of ash from the incineration of cellulose as a filler in bituminous mixtures. We analyze the adhesiveness of the filler/bitumen system in dry and wet states, based on the Cantabro wear loss test. The results obtained show that the limit of the relation between the volumetric concentration and critical concentration (Cv/Cs) is 1 for the addition of ash and that concentrations lower than or equal to this value present controlled losses, with 1.00 being the optimal (Cv/Cs) ratio that allows better behavior against the effect of water.
Diana Movilla-Quesada; Aitor Raposeiras; Manuel Lagos-Varas; Osvaldo Muñoz-Cáceres; Valerio-Carlos Andrés-Valeri; Loreto Troncoso. Study of the Optimal Dosage of Celullose Ash as a Contribution Filler in Asphalt Mixtures Based on Its Adhesiveness under Moisture Conditions. Sustainability 2021, 13, 854 .
AMA StyleDiana Movilla-Quesada, Aitor Raposeiras, Manuel Lagos-Varas, Osvaldo Muñoz-Cáceres, Valerio-Carlos Andrés-Valeri, Loreto Troncoso. Study of the Optimal Dosage of Celullose Ash as a Contribution Filler in Asphalt Mixtures Based on Its Adhesiveness under Moisture Conditions. Sustainability. 2021; 13 (2):854.
Chicago/Turabian StyleDiana Movilla-Quesada; Aitor Raposeiras; Manuel Lagos-Varas; Osvaldo Muñoz-Cáceres; Valerio-Carlos Andrés-Valeri; Loreto Troncoso. 2021. "Study of the Optimal Dosage of Celullose Ash as a Contribution Filler in Asphalt Mixtures Based on Its Adhesiveness under Moisture Conditions." Sustainability 13, no. 2: 854.
The accumulation of load on asphalt pavement as a result of increased vehicle traffic generates problems in the asphalt layer due to permanent deformation. For correct design, it is essential to carry out a rheological characterization of the aggregate-binder materials that make up the asphalt mix. This article shows the analysis of permanent deformation based on the rheological behavior of asphalt mixtures and binders. Experimental tests based on creep and recovery phenomena allow the study of permanent deformations using theoretical models of fractional viscoelasticity. The rheological characterization allows us to detail the elasticity of the aggregate, ξ2, and the elastic-viscous properties of the different binders used, ξ1 and η. The results obtained show that it is possible to predict the deformations of the recovery phenomenon in asphalt mixtures from the rheological values (aggregate-binder) obtained in the creep process. Besides, the properties of the asphalt binder (ξ1 and η) correlate with the recovery phenomenon of the MSCR test for conventional and modified materials. The methodology proposed allows a better understanding of the states of permanent deformation to improve the design of binders and asphalt mixtures.
M. Lagos-Varas; A.C. Raposeiras; D. Movilla-Quesada; J.P. Arenas; D. Castro-Fresno; O. Muñoz-Cáceres; V.C. Andres-Valeri. Study of the permanent deformation of binders and asphalt mixtures using rheological models of fractional viscoelasticity. Construction and Building Materials 2020, 260, 120438 .
AMA StyleM. Lagos-Varas, A.C. Raposeiras, D. Movilla-Quesada, J.P. Arenas, D. Castro-Fresno, O. Muñoz-Cáceres, V.C. Andres-Valeri. Study of the permanent deformation of binders and asphalt mixtures using rheological models of fractional viscoelasticity. Construction and Building Materials. 2020; 260 ():120438.
Chicago/Turabian StyleM. Lagos-Varas; A.C. Raposeiras; D. Movilla-Quesada; J.P. Arenas; D. Castro-Fresno; O. Muñoz-Cáceres; V.C. Andres-Valeri. 2020. "Study of the permanent deformation of binders and asphalt mixtures using rheological models of fractional viscoelasticity." Construction and Building Materials 260, no. : 120438.