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Prof. Osvaldo Muñoz-Cáceres
Universidad Austral de Chile (UACh)

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0 Fillers
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Journal article
Published: 28 August 2021 in Construction and Building Materials
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The use of reclaimed asphalt pavement (RAP) in the construction of hot mix asphalt (HMA) pavements is a widely used alternative in the development of sustainable road infrastructure. For this reason, the use of higher RAP contents continues to be a topic of interest. This study evaluated the performance of semi-dense asphalt mixtures incorporating 50% to 70% RAP and 7.5% and 15% copper slag (CS) as partial replacement of aggregate, to determine the influence of CS on the effective increase of RAP in the design of sustainable asphalt mixtures. The mixtures were evaluated using macrotexture, fatigue strengths, water sensitivity, and the Hamburg wheel tracking test. The results show that the use of RAP improves the permanent deformation resistance (RD) and fatigue life of the mixtures, while the mean texture depth (MTD) and indirect tensile strength ratio (ITSR) decrease. The incorporation of CS in the mixtures with RAP improved MTD and ITSR compared to the mixtures including only RAP and allowed higher RAP contents in fatigue and Hamburg wheel tests without showing a negative influence.

ACS Style

Osvaldo Muñoz-Cáceres; Aitor C. Raposeiras; Diana Movilla-Quesada; Daniel Castro-Fresno; Manuel Lagos-Varas; Valerio C. Andrés-Valeri; Gonzalo Valdés-Vidal. Mechanical performance of sustainable asphalt mixtures manufactured with copper slag and high percentages of reclaimed asphalt pavement. Construction and Building Materials 2021, 304, 124653 .

AMA Style

Osvaldo Muñoz-Cáceres, Aitor C. Raposeiras, Diana Movilla-Quesada, Daniel Castro-Fresno, Manuel Lagos-Varas, Valerio C. Andrés-Valeri, Gonzalo Valdés-Vidal. Mechanical performance of sustainable asphalt mixtures manufactured with copper slag and high percentages of reclaimed asphalt pavement. Construction and Building Materials. 2021; 304 ():124653.

Chicago/Turabian Style

Osvaldo Muñoz-Cáceres; Aitor C. Raposeiras; Diana Movilla-Quesada; Daniel Castro-Fresno; Manuel Lagos-Varas; Valerio C. Andrés-Valeri; Gonzalo Valdés-Vidal. 2021. "Mechanical performance of sustainable asphalt mixtures manufactured with copper slag and high percentages of reclaimed asphalt pavement." Construction and Building Materials 304, no. : 124653.

Journal article
Published: 20 July 2021 in Sustainability
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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.

ACS Style

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 Style

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 (14):8081.

Chicago/Turabian Style

Diana 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.

Journal article
Published: 29 May 2021 in Journal of Environmental Management
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Copper slag is a waste obtained from copper production and it has a limited use, being mainly accumulated in landfills on a massive scale. This material presents a high hardness and it has hydrophobic properties, so it can be used as aggregate replacement in the production of asphalt mixtures. However, each size of copper slag behaves differently when used in asphalt mixes, especially under changing conditions of moisture or temperature. Precisely these climatic factors directly affect the service life of asphalt pavements. In this research, semi-dense graded asphalt mixtures were produced with copper slag as replacement of aggregates, varying the particle sizes used in the range from 2.5 to 0.08 mm to determine the size of copper slag with the best performance. Indirect tensile strength tests were used to analyze samples subjected to different moisture and temperature conditions and ageing degrees. The results show that copper slag can be used as aggregate replacement in asphalt mixes when the proper size is selected. The strength of the asphalt mixture increased as the size of the copper slag increased, especially under variable moisture and ageing conditions. Superior behaviour compared to a reference mixture was obtained when replacing the size of aggregate No. 8 with copper slag, increasing its indirect tensile strength and retained strength, reducing its stiffness under all the ageing periods, and being equally effective at the different temperatures, which results in mixtures with improved durability and delayed cracking. Furthermore, it would help to reduce between 15 and 20% of the virgin aggregate needed to produce asphalt mixes and it would also allow reducing the accumulated volume of this waste, decreasing the environmental impact of both industries.

ACS Style

Aitor C. Raposeiras; Diana Movilla-Quesada; Osvaldo Muñoz-Cáceres; Valerio C. Andrés-Valeri; Manuel Lagos-Varas. Production of asphalt mixes with copper industry wastes: Use of copper slag as raw material replacement. Journal of Environmental Management 2021, 293, 112867 .

AMA Style

Aitor C. Raposeiras, Diana Movilla-Quesada, Osvaldo Muñoz-Cáceres, Valerio C. Andrés-Valeri, Manuel Lagos-Varas. Production of asphalt mixes with copper industry wastes: Use of copper slag as raw material replacement. Journal of Environmental Management. 2021; 293 ():112867.

Chicago/Turabian Style

Aitor C. Raposeiras; Diana Movilla-Quesada; Osvaldo Muñoz-Cáceres; Valerio C. Andrés-Valeri; Manuel Lagos-Varas. 2021. "Production of asphalt mixes with copper industry wastes: Use of copper slag as raw material replacement." Journal of Environmental Management 293, no. : 112867.

Journal article
Published: 16 January 2021 in Sustainability
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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.

ACS Style

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 Style

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 (2):854.

Chicago/Turabian Style

Diana 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.

Journal article
Published: 30 August 2020 in Construction and Building Materials
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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.

ACS Style

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 Style

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.

Chicago/Turabian Style

M. 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.

Journal article
Published: 01 July 2017 in Construction and Building Materials
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ACS Style

D. Movilla-Quesada; A.C. Raposeiras; O. Muñoz; Daniel Castro-Fresno. Reduction in the use of mineral aggregate by recycling cellulose ashes to decrease the aging of hot asphalt mixtures. Construction and Building Materials 2017, 143, 547 -557.

AMA Style

D. Movilla-Quesada, A.C. Raposeiras, O. Muñoz, Daniel Castro-Fresno. Reduction in the use of mineral aggregate by recycling cellulose ashes to decrease the aging of hot asphalt mixtures. Construction and Building Materials. 2017; 143 ():547-557.

Chicago/Turabian Style

D. Movilla-Quesada; A.C. Raposeiras; O. Muñoz; Daniel Castro-Fresno. 2017. "Reduction in the use of mineral aggregate by recycling cellulose ashes to decrease the aging of hot asphalt mixtures." Construction and Building Materials 143, no. : 547-557.