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Miguel Oliveira
Higher Institute of Engineering, University of Algarve, CEPAC/CTA, 8005-139 Faro, Portugal

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Short Biography

PhD in Civil Engineering. Professor at Universidade do Algarve (UAlg). Active member in several research and study centers. He is an author of more than 40 manuscripts and a frequent reviewer of international peer-reviewed journals. Participated and coordinated several research projects. Integrated several organizing and scientific conference commissions. He supervised several students at the doctoral and master's thesis level. His area of expertise covers sustainable development and technological innovation.

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Journal article
Published: 28 May 2021 in Sustainability
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The Algarve region, located in the south of Portugal, is a well-known tourism destination that seeks to be sustainable and competitive. The local administration looks to establish a collaborative network, where stakeholders take a crucial role. The research aims to appeal to the accommodations and food services stakeholders to have a shared vision of the issues and priorities related to sustainable tourism development. Their perception is a critical factor in making decisions regarding the region’s competitiveness. Algarve’s two major and leading associations of the tourism supply sector AIHSA and AHETA were invited to participate in the study. Based on the responses of an online questionnaire, an artificial intelligence algorithm was applied to the data to identify the common and divergent aspects. The conceptual model developed is based on a simplified model of psychological ownership. The results highlight a convergent perspective regarding sustainability challenges, namely, natural resources and biodiversity, safety, and supply chain. However, hotels and restaurants do not reflect the same perception regarding sustainability initiatives, e-tourism, or free internet access. These divergences are essential results since they indicated which issues require local authorities’ priority intervention.

ACS Style

Fátima Farinha; David Bienvenido-Huertas; Manuel Duarte Pinheiro; Elisa Silva; Rui Lança; Miguel José Oliveira; Ricardo Batista. Sustainable Competitiveness of Tourism in the Algarve Region. Critical Stakeholders’ Perception of the Supply Sector. Sustainability 2021, 13, 6072 .

AMA Style

Fátima Farinha, David Bienvenido-Huertas, Manuel Duarte Pinheiro, Elisa Silva, Rui Lança, Miguel José Oliveira, Ricardo Batista. Sustainable Competitiveness of Tourism in the Algarve Region. Critical Stakeholders’ Perception of the Supply Sector. Sustainability. 2021; 13 (11):6072.

Chicago/Turabian Style

Fátima Farinha; David Bienvenido-Huertas; Manuel Duarte Pinheiro; Elisa Silva; Rui Lança; Miguel José Oliveira; Ricardo Batista. 2021. "Sustainable Competitiveness of Tourism in the Algarve Region. Critical Stakeholders’ Perception of the Supply Sector." Sustainability 13, no. 11: 6072.

Journal article
Published: 28 December 2020 in Sustainability
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Building construction and building operations have a massive direct and indirect effect on the environment. Cement-based materials will remain essential to supply the growth of our built environment. Without preventive measures, this necessary demand in cement production will imply a substantial increase in CO2 generation. Reductions in global CO2 emissions due to cement consumption may be achieved by improvements on two main areas: increased use of low CO2 supplementary cementitious materials and a more efficient use of Portland cement clinker in mortars and concretes. The use of ground granulated blast furnace slag in concrete, as cement constituent or as latent hydraulic binder, is a current practice, but information of concrete with ladle furnace slag is more limited. Specific knowledge of the behavior of mixtures with steel slag in relation to certain properties needs to be improved. This paper presents the results of the shrinkage (total and autogenous) of five concrete mixtures, produced with different percentages of two different slags in substitution of cement. The results show that shrinkage of concrete with the two different slags diverges. These different characteristics of the two materials suggest that their use in combination can be useful in optimizing the performance of concrete.

ACS Style

Maria Rubio-Cintas; Maria Parron-Rubio; Francisca Perez-Garcia; António Bettencourt Ribeiro; Miguel Oliveira. Influence of Steel Slag Type on Concrete Shrinkage. Sustainability 2020, 13, 214 .

AMA Style

Maria Rubio-Cintas, Maria Parron-Rubio, Francisca Perez-Garcia, António Bettencourt Ribeiro, Miguel Oliveira. Influence of Steel Slag Type on Concrete Shrinkage. Sustainability. 2020; 13 (1):214.

Chicago/Turabian Style

Maria Rubio-Cintas; Maria Parron-Rubio; Francisca Perez-Garcia; António Bettencourt Ribeiro; Miguel Oliveira. 2020. "Influence of Steel Slag Type on Concrete Shrinkage." Sustainability 13, no. 1: 214.

Journal article
Published: 18 May 2020 in Energy
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The energy performance of a building is affected by the periodic thermal properties of the walls, and reliable methods of characterising these are therefore required. However, the methods that are currently available involve theoretical calculations that make it difficult to assess the condition of existing walls. In this study, the characterisation of the periodic thermal variables of walls using experimental measurements and methods as described in ISO 13786 was assessed. Two regression algorithms (multilayer perceptron [MLP] and random forest [RF]) and input variables obtained using two experimental methods (the heat flow meter and the thermometric method) were used. The methods gave accurate estimates, and better statistical parameter values were given by the RF models than the multilayer perceptron models. For all the periodic thermal variables, the percentage differences between the actual values and the estimated values given by the RF algorithm were low. The heat flow meter and the thermometric methods can both be used to characterise accurately the periodic thermal properties of walls using the RF algorithm. The variables specific to each method, including the wall thickness and the date of construction, affected the accuracies of the models most strongly.

ACS Style

David Bienvenido-Huertas; Carlos Rubio-Bellido; Jaime Solís-Guzmán; Miguel José Oliveira. Experimental characterisation of the periodic thermal properties of walls using artificial intelligence. Energy 2020, 203, 117871 .

AMA Style

David Bienvenido-Huertas, Carlos Rubio-Bellido, Jaime Solís-Guzmán, Miguel José Oliveira. Experimental characterisation of the periodic thermal properties of walls using artificial intelligence. Energy. 2020; 203 ():117871.

Chicago/Turabian Style

David Bienvenido-Huertas; Carlos Rubio-Bellido; Jaime Solís-Guzmán; Miguel José Oliveira. 2020. "Experimental characterisation of the periodic thermal properties of walls using artificial intelligence." Energy 203, no. : 117871.

Technical paper
Published: 25 February 2020 in Structural Concrete
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Self‐compacting concrete (SCC) is a concrete that does not require vibration for casting and consolidation. It is able to flow under its own weight, completely filling the formwork and achieving full consolidation, even in the presence of congested reinforcement. SCC possesses special technical features and properties that recommend its application in a considerable amount of applications. Nevertheless, an inadequate behavior of the material at early ages has been observed in some situations, due to shrinkage. Shrinkage has a significant importance in the design, construction and in‐service performance of concrete structures. The regulatory requirements were derived from experience with traditional concrete, which is not always suitable for SCC. In addition, the option of using new materials, such as binders with large amount of pozzolanic or latent hydraulic additions, strongly limits the validity of existing rules. In order to contribute for a better understanding of the major drawback of this material—its high potential shrinkage, experimental research was carried out using different commercial shrinkage‐compensating products. This study focuses on the use of a shrinkage reducing admixture and an expansive agent. The results obtained demonstrate the efficiency of the individual or combined use of these products and allowed identifying three different strategies to control the shrinkage, with distinct levels of efficiency.

ACS Style

Miguel José Oliveira; António Bettencourt Ribeiro; Fernando G. Branco. Strategies to mitigate shrinkage in an intermediate strength self‐compacting concrete. Structural Concrete 2020, 22, 1 .

AMA Style

Miguel José Oliveira, António Bettencourt Ribeiro, Fernando G. Branco. Strategies to mitigate shrinkage in an intermediate strength self‐compacting concrete. Structural Concrete. 2020; 22 (S1):1.

Chicago/Turabian Style

Miguel José Oliveira; António Bettencourt Ribeiro; Fernando G. Branco. 2020. "Strategies to mitigate shrinkage in an intermediate strength self‐compacting concrete." Structural Concrete 22, no. S1: 1.

Journal article
Published: 18 February 2020 in Sustainability
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This study analyses the most appropriate methodology to make similarity classifications among the cities of the Algarve (Portugal) according to 105 sustainability indicators monitored with the Observatory of Sustainability of the Algarve Region for Tourism (OBSERVE). The methodology used to establish the similarities was the cluster analysis with 4 different approaches which reduced the dimensions of the data set: total approach, pillar approach, subject area approach, and indicator approach. By combining the approaches, a total of 620 different cluster analyses were performed. The results reflected that the data analysis approaches with less dimensions were those that performed the best groups among cities. In this sense, the approaches with a high number of indicators (e.g., the total or the pillar approach) were characterised by misclassifying cities in more than 30% of the indicators. Thus, the most acceptable cluster analysis approach was that with a low number of indicators. Through this approach, it was possible to make correct groups of the sustainability level of the cities of the Algarve. These results provided an appropriate methodology for the decision-making regarding the sustainability of a region and could be extrapolated to other regions to assess sustainability or environmental indicators.

ACS Style

David Bienvenido-Huertas; Fátima Farinha; Miguel José Oliveira; Elisa M. J. Silva; Rui Lança. Challenge for Planning by Using Cluster Methodology: The Case Study of the Algarve Region. Sustainability 2020, 12, 1536 .

AMA Style

David Bienvenido-Huertas, Fátima Farinha, Miguel José Oliveira, Elisa M. J. Silva, Rui Lança. Challenge for Planning by Using Cluster Methodology: The Case Study of the Algarve Region. Sustainability. 2020; 12 (4):1536.

Chicago/Turabian Style

David Bienvenido-Huertas; Fátima Farinha; Miguel José Oliveira; Elisa M. J. Silva; Rui Lança. 2020. "Challenge for Planning by Using Cluster Methodology: The Case Study of the Algarve Region." Sustainability 12, no. 4: 1536.

Journal article
Published: 15 November 2019 in Sustainable Cities and Society
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The use of setpoint temperatures based on adaptive comfort algorithms is a method more and more used as an energy saving technique. Knowing the relationship between inhabitable rooms with their specific climate is crucial for users’ climate adaptation, especially in a global warming context. This research analyses the influence of EN 15251:2007, EN 16798-1:2019, and ASHRAE 55-2017 standards on an office building located in 65 cities. The effects of climate change have been considered in the energy performance of current, 2050, and 2100 scenarios. Also, 780 dynamic simulations were performed so that a cluster analysis was carried out to determine the similarity relationships among the various zones. The results show that the model of the EN 16798-1:2019 standard was the option achieving a greater energy saving in current and future scenarios, and the use of energy was greatly reduced in those zones characterized by having a greater cooling energy consumption. Moreover, the differences of energy consumption between the adaptive models in the cities and years generated that the clusters presented differences among all cities, so such scenarios are required to be considered for future interventions. This research is the transition towards the goals proposed by the European Union for 2050.

ACS Style

David Bienvenido-Huertas; Daniel Sánchez-García; Carlos Rubio-Bellido; Miguel José Oliveira. Influence of adaptive energy saving techniques on office buildings located in cities of the Iberian Peninsula. Sustainable Cities and Society 2019, 53, 101944 .

AMA Style

David Bienvenido-Huertas, Daniel Sánchez-García, Carlos Rubio-Bellido, Miguel José Oliveira. Influence of adaptive energy saving techniques on office buildings located in cities of the Iberian Peninsula. Sustainable Cities and Society. 2019; 53 ():101944.

Chicago/Turabian Style

David Bienvenido-Huertas; Daniel Sánchez-García; Carlos Rubio-Bellido; Miguel José Oliveira. 2019. "Influence of adaptive energy saving techniques on office buildings located in cities of the Iberian Peninsula." Sustainable Cities and Society 53, no. : 101944.

Journal article
Published: 17 October 2019 in Building and Environment
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Reducing energy consumption and greenhouse gases emissions is among the main challenges of building sector. It is therefore crucial to know the characteristics of envelopes. There are experimental methods to determine thermal transmittance, but limitations are presented. By using techniques of artificial intelligence, this article solves the limitations of current methods by predicting correctly the thermal transmittance value of ISO 6946 and the building period of a wall with monitored data. The methodology used is extrapolated to any country: 163 real monitorings and 140 different typologies of walls have been combined to generate the dataset (22,820 items). The results show the optimal operation of the Random Forest algorithm because both the thermal transmittance of ISO 6946 and the building period are determined by using the most common methods: the heat flow meter method and the thermometric method. This study makes progress towards more automatized processes to characterize thermal transmittance.

ACS Style

David Bienvenido-Huertas; Carlos Rubio-Bellido; Juan Luis Pérez-Ordóñez; Miguel José Oliveira. Automation and optimization of in-situ assessment of wall thermal transmittance using a Random Forest algorithm. Building and Environment 2019, 168, 106479 .

AMA Style

David Bienvenido-Huertas, Carlos Rubio-Bellido, Juan Luis Pérez-Ordóñez, Miguel José Oliveira. Automation and optimization of in-situ assessment of wall thermal transmittance using a Random Forest algorithm. Building and Environment. 2019; 168 ():106479.

Chicago/Turabian Style

David Bienvenido-Huertas; Carlos Rubio-Bellido; Juan Luis Pérez-Ordóñez; Miguel José Oliveira. 2019. "Automation and optimization of in-situ assessment of wall thermal transmittance using a Random Forest algorithm." Building and Environment 168, no. : 106479.

Journal article
Published: 10 October 2019 in Sustainability
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To achieve the goals of reducing building energy consumption, regulations are being designed to guarantee the appropriate energy performance of buildings. Both European and South American countries establish requirements of thermal properties of building envelope according to the climate zone, thus implying notable differences in climate classifications and technical requirements. This research provides a general view of advantages and limitations between the different state regulations of three South American countries (Argentina, Brazil, and Chile) and three European countries (Spain, Portugal, and France). A total of 792 simulations were conducted with Energy Plus by considering 12 different dwelling typologies in 66 climate zones. Building envelopes were adapted to the regulations of the various countries. Results showed tendencies of performance clearly different between the South American and the European countries, with the latter being those with the lowest energy demands. The cluster analysis of distributions of energy demand revealed that buildings located in similar climates but in different countries present very different energy performances. This research opens up the discussion on the development of more demanding policies related to thermal properties of buildings. Also, the analysis at a continental scale could reduce the differences between countries and guarantee a more sustainable life for the building stock.

ACS Style

David Bienvenido-Huertas; Miguel Oliveira; Carlos Rubio-Bellido; David Marín. A Comparative Analysis of the International Regulation of Thermal Properties in Building Envelope. Sustainability 2019, 11, 5574 .

AMA Style

David Bienvenido-Huertas, Miguel Oliveira, Carlos Rubio-Bellido, David Marín. A Comparative Analysis of the International Regulation of Thermal Properties in Building Envelope. Sustainability. 2019; 11 (20):5574.

Chicago/Turabian Style

David Bienvenido-Huertas; Miguel Oliveira; Carlos Rubio-Bellido; David Marín. 2019. "A Comparative Analysis of the International Regulation of Thermal Properties in Building Envelope." Sustainability 11, no. 20: 5574.

Conference paper
Published: 20 September 2019 in INCREaSE 2019
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Residential buildings have considerable potential in terms of improving energy efficiency and the energy of HVAC systems. The European Commission has recognized this aspect since 2003, and has required countries to prepare specific regulations and legislation. In order to contribute to the thermal energy efficiency of typical residential buildings located on southern Spain and Portugal, a research team composed with members of Seville and Algarve Universities, is developing work to meet the 2020 targets and provide almost null energy consumption buildings. To do so, the use of HVAC systems should be minimized and preferably eliminated from the building. Both countries have to apply and respect their national regulations regarding energy efficiency, however, the scope goes far behind and it aims to produce real requirements to reduce the demand of energy on this type of buildings. Some solutions are presented hereby.

ACS Style

David Marín-García; David Bienvenido-Huertas; Enrique Nieto-Julián; Juan José Moyano Campos; Miguel José Oliveira; Fátima Farinha. Analysis of the Regulations that Affect Energy Efficiency with Respect to Consumption of HVAC System for Residential Buildings in Southern Spain and Portugal. INCREaSE 2019 2019, 478 -486.

AMA Style

David Marín-García, David Bienvenido-Huertas, Enrique Nieto-Julián, Juan José Moyano Campos, Miguel José Oliveira, Fátima Farinha. Analysis of the Regulations that Affect Energy Efficiency with Respect to Consumption of HVAC System for Residential Buildings in Southern Spain and Portugal. INCREaSE 2019. 2019; ():478-486.

Chicago/Turabian Style

David Marín-García; David Bienvenido-Huertas; Enrique Nieto-Julián; Juan José Moyano Campos; Miguel José Oliveira; Fátima Farinha. 2019. "Analysis of the Regulations that Affect Energy Efficiency with Respect to Consumption of HVAC System for Residential Buildings in Southern Spain and Portugal." INCREaSE 2019 , no. : 478-486.

Conference paper
Published: 20 September 2019 in INCREaSE 2019
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Construction and demolition wastes (C&DW) are often deposited in landfills and dumpsters in urban perimeters, causing weighty environmental and social impacts. The reuse of C&DW in innovative concrete formulations is a good solution for both problems. Recycled aggregates (RA), prepared from C&DW, generally show lower quality properties than natural aggregates. This reuse has been extensively studied mainly in conventional concrete, although there are few studies regarding the incorporation of RA into the sprayed concrete and the information is almost non-existent. The use of sprayed concrete is a flexible, economical and fast construction method, but it requires specialized skilled workers and a high degree of mechanization. It is fairly common to use this technique in new construction structures such as vaults, tunnels, canals, reservoirs, swimming pools and sewers. In Algarve, sprayed concrete is used in the construction of more than 70% of all swimming pools. Under the project SPOOLs – sustainable pools, whose objective is to develop more sustainable pools, it was developed a composition of sprayed concrete that incorporates RA. This paper presents the results of strength and durability from several mixtures of hardened concrete and the prescription of the optimized composition, regarding the existing regulations. At the same time, there were also assessed the consequences upon the quality of the sprayed concrete when the operator, through the dry projection method, adds different amounts of water. Significant environmental savings would be gained if part of the required materials for this production, would be replaced by recycled material, such as RA.

ACS Style

Alfredo Braga; Miguel José Oliveira; Elisa Maria De Jesus Da Silva; Rui Lança; Paulo Cabral; Francisco Do Carmo. Sprayed Concrete with Recycled Aggregates for Swimming Pools Structures. INCREaSE 2019 2019, 815 -825.

AMA Style

Alfredo Braga, Miguel José Oliveira, Elisa Maria De Jesus Da Silva, Rui Lança, Paulo Cabral, Francisco Do Carmo. Sprayed Concrete with Recycled Aggregates for Swimming Pools Structures. INCREaSE 2019. 2019; ():815-825.

Chicago/Turabian Style

Alfredo Braga; Miguel José Oliveira; Elisa Maria De Jesus Da Silva; Rui Lança; Paulo Cabral; Francisco Do Carmo. 2019. "Sprayed Concrete with Recycled Aggregates for Swimming Pools Structures." INCREaSE 2019 , no. : 815-825.

Conference paper
Published: 20 September 2019 in INCREaSE 2019
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Rehabilitation of existing structures is rapidly increasing. Today, it is estimated that, in developed countries, half of the existing bridges have over 50 years old. Bridge structures, like others, deteriorate with time due to abnormal floods, foundations erosion, ground movement/subsidence, lack of maintenance, overloading, environmental effects, inadequacy of design and construction. Maintenance is necessary to preserve the load capacity design of the bridge and ensure the safety of those using it. Rehabilitation implies to guarantee service level considering the new conditions and actions. In concrete bridges, corrosion of reinforcement and spalling of the concrete cover, may lead to loss of strength and unserviceability. Corrosion is initiated mainly by chloride contamination or exposure to atmospheric CO2, although others pollutants can also contribute. However, is often exacerbated by the reduction of concrete cover, low quality of the concretes for certain aggressive environments, and poor compaction and curing. Bridge rehabilitation process should be preceded by assessment and evaluation of the structure, to determine its actual strength condition and to select the proper rehabilitation techniques and materials. This kind of processes involves the intervention of several experts. The case study hereby presented is the concrete bridge over the Foupana river, in the Algarve. The paper focuses on the inspection, assessment and rehabilitation, and it presents two rehabilitation strategies: major repair versus replacement. Also multiple constraints imposed by economic, social and environmental aspects are highlighted by the authors, since they greatly influenced the rehabilitation procedure and outcome.

ACS Style

Roberto Laranja; Miguel José Oliveira; Elisa Maria De Jesus Da Silva; Fernando Barata. Foupana Concrete Bridge Repair Case Study - Stakeholders Integrated Analysis. INCREaSE 2019 2019, 1016 -1030.

AMA Style

Roberto Laranja, Miguel José Oliveira, Elisa Maria De Jesus Da Silva, Fernando Barata. Foupana Concrete Bridge Repair Case Study - Stakeholders Integrated Analysis. INCREaSE 2019. 2019; ():1016-1030.

Chicago/Turabian Style

Roberto Laranja; Miguel José Oliveira; Elisa Maria De Jesus Da Silva; Fernando Barata. 2019. "Foupana Concrete Bridge Repair Case Study - Stakeholders Integrated Analysis." INCREaSE 2019 , no. : 1016-1030.

Conference paper
Published: 20 September 2019 in INCREaSE 2019
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Concrete is one of the most widely used construction materials in the world. The production of Portland cement, an essential constituent of concrete, leads to the release of significant amounts of CO2. The global production of concrete represents more than 5% of the anthropogenic emissions of carbon dioxide every year, mainly from the production of cement. The replacement of cement by fly ash and other industrial waste, such as steel slag, is a good example of how resource conservation can be improved and contamination can be reduced. Future trends predicts an increment of the demand for steel, worldwide. The steelmaking process produces slags, ranging from 10 to 15% per ton of steel, however its reutilization is still reduced, being deposited in landfills. The technical feasibility of replacing a large part of the cement with blast furnace slag gave good results, nevertheless, it is crucial to study the short and long term shrinkage evaluation. Shrinkage crack reduction is an important factor on the durability point of view, as well as on its strength. This study, conducted by the TEP-951 Cadiz research group, presents laboratory test results on the total and autogenous shrinkage of medium strength concrete, with partial replacement of cement by slags. Different slags were tested, namely ladle furnaces slags (LFS) and ground granulated blast furnace slags (GGBFS). The results hereby presented do not reveal significant divergences on the concrete shrinkage, for both slags. The percentage of slags used on both mixtures is the same and correspond to 25%.

ACS Style

Maria Eugenia Parron; Maria Dolores Rubio Cintas; Miguel José Oliveira; Elisa Maria De Jesus Da Silva; Francisca Pérez García; Jose Manuel Garcia-Manrique. Steel Waste Valorisation - Steel Slag Waste Effect on Concrete Shrinkage. INCREaSE 2019 2019, 826 -835.

AMA Style

Maria Eugenia Parron, Maria Dolores Rubio Cintas, Miguel José Oliveira, Elisa Maria De Jesus Da Silva, Francisca Pérez García, Jose Manuel Garcia-Manrique. Steel Waste Valorisation - Steel Slag Waste Effect on Concrete Shrinkage. INCREaSE 2019. 2019; ():826-835.

Chicago/Turabian Style

Maria Eugenia Parron; Maria Dolores Rubio Cintas; Miguel José Oliveira; Elisa Maria De Jesus Da Silva; Francisca Pérez García; Jose Manuel Garcia-Manrique. 2019. "Steel Waste Valorisation - Steel Slag Waste Effect on Concrete Shrinkage." INCREaSE 2019 , no. : 826-835.

Conference paper
Published: 20 September 2019 in INCREaSE 2019
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The global production of concrete represents, every year, more than 5% of the anthropogenic emissions of carbon dioxide, mainly from the production of cement. This negative factor can be improved by incorporating supplementary cementitious materials in order to replace cement. In the last few decades, research has been conducted on what it is known as Ultra High Performance Fibber Reinforced Concrete (UHPFRC). The term includes a broad range of materials such as defect-free, dense particle, engineered composite, multi-scale particle and fibber-reinforced cementitious materials, with enhanced properties. UHPFRC has better mechanical and durability properties compared to normal strength concrete. Other benefits of using UHPFRC on a structure includes the reduction of concrete sections, concrete formwork, labour, equipment and time of construction. Despite of the benefits associated to this material, the UHPFRC is still struggling to be universally applied, mainly due to its high cost and its high environmental impact. UHPFRC cost is higher than normal concrete, due to a very high powder content and steel fibber addition. However, the production of UHPFRC using locally available materials, under normal curing conditions, should reduce its cost and turned it into a more attractive construction product. In this paper, the fresh and hardened properties of a specific UHPFRC composition are presented. The mixture replaces a significant percentage of cement by slags, and the results reveal the viability of the proposed mix. The environmental performance of the mixture confirmed the improvement on the material sustainability and allowed the identification of some potential future studies.

ACS Style

Maria Dolores Rubio Cintas; Miguel José Oliveira; Elisa Maria De Jesus Da Silva; Maria Eugenia Parron; Francisca Pérez García; Manuel Alejandro Fernandez Ruiz. Sustainable Development of an Ultra-High Performance Fibber Reinforced Concrete (UHPFRC): Towards Partial Replacement of Cement by Slags. INCREaSE 2019 2019, 836 -849.

AMA Style

Maria Dolores Rubio Cintas, Miguel José Oliveira, Elisa Maria De Jesus Da Silva, Maria Eugenia Parron, Francisca Pérez García, Manuel Alejandro Fernandez Ruiz. Sustainable Development of an Ultra-High Performance Fibber Reinforced Concrete (UHPFRC): Towards Partial Replacement of Cement by Slags. INCREaSE 2019. 2019; ():836-849.

Chicago/Turabian Style

Maria Dolores Rubio Cintas; Miguel José Oliveira; Elisa Maria De Jesus Da Silva; Maria Eugenia Parron; Francisca Pérez García; Manuel Alejandro Fernandez Ruiz. 2019. "Sustainable Development of an Ultra-High Performance Fibber Reinforced Concrete (UHPFRC): Towards Partial Replacement of Cement by Slags." INCREaSE 2019 , no. : 836-849.

Conference paper
Published: 20 September 2019 in INCREaSE 2019
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The University of Algarve, in consortium with Saint-Gobain Weber Portugal and Cristal Construction- Materials and Civil Construction Works, is developing a new concept of sustainable swimming pool (SPOOLs – sustainable pools project), more environmentally friendly, increasing energy efficient and reducing maintenance costs. The Algarve is a popular touristic destination in Portugal and in Europe. It receives millions of international and national tourists annually. Algarve is known by its warm and sunny climate and the people appreciate the houses and hotels with swimming pools, preferably surrounded by grass and trees and thus providing a pleasant green ambience. The construction, installation and maintenance of swimming pools is relatively recent, existing in large scale only in the last 50 years. During this period, the construction technologies evolved significantly and nowadays there are different solutions. Most of the existing swimming pools in Algarve, correspond to small swimming pools, built in residential areas and therefore in most cases there is no available data about the design and technical specifications. Within the scope of the I&DT project SPOOLs, an online questionnaire about the typology and durability of swimming pools in the Algarve was elaborated, for which more than 100 responses were obtained. From the analysis of the results it is possible to make several considerations about the durability and construction pathologies. The results hereby presented validate the conclusions, regarding the major swimming pools pathologies, as well as their sustainability.

ACS Style

Miguel José Oliveira; Elisa Maria De Jesus Da Silva; Rui Lança; Alfredo Braga; Manuela Silva; Armando Inverno; Paulo Cabral; Francisco Do Carmo; Luís Silva; Pedro Sequeira. Common Typology, Durability and Pathologies of the Swimming Pools in the Algarve Region - Implications in the Sustainability. INCREaSE 2019 2019, 893 -902.

AMA Style

Miguel José Oliveira, Elisa Maria De Jesus Da Silva, Rui Lança, Alfredo Braga, Manuela Silva, Armando Inverno, Paulo Cabral, Francisco Do Carmo, Luís Silva, Pedro Sequeira. Common Typology, Durability and Pathologies of the Swimming Pools in the Algarve Region - Implications in the Sustainability. INCREaSE 2019. 2019; ():893-902.

Chicago/Turabian Style

Miguel José Oliveira; Elisa Maria De Jesus Da Silva; Rui Lança; Alfredo Braga; Manuela Silva; Armando Inverno; Paulo Cabral; Francisco Do Carmo; Luís Silva; Pedro Sequeira. 2019. "Common Typology, Durability and Pathologies of the Swimming Pools in the Algarve Region - Implications in the Sustainability." INCREaSE 2019 , no. : 893-902.

Journal article
Published: 04 September 2019 in Materials
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A circular economy is a current tenet that must be implemented in the field of construction. That would imply the study of the possibilities of the use of waste generated, for obtaining materials the used in construction as replacements for the raw material used. One of these possibilities is the substitution of the cement by slag, which contributes to the reduction of cement consumption, decreasing CO2 emissions, while solving a waste management problem. In the present paper, different types of concrete made by cement substitution with different type of slags have been studied in order to evaluate the properties of these materials. Cement is replaced by slag from different steel mills, both blast furnace and ladle furnace slag. The percentages of slag substitution by cement are 30%, 40% and 50% by weight. Mechanical, physical and environmental properties have been evaluated. Compressive and flexural strength have been analysed as the main mechanical properties. As far as physical properties go, density and porosity tests were be reported and analysed, and from an environmental point of view, a leachate study was performed. It has been found that some kinds of slag (blast furnace slag) are very suitable as substitutes for cement, providing properties above those of the reference concrete, while other types (ladle furnace slag) could be valid for non-structural applications, contributing in both cases to a circular economy.

ACS Style

María Eugenia Parron-Rubio; Francisca Perez-Garcia; Antonio Gonzalez-Herrera; Miguel José Oliveira; Maria Dolores Rubio-Cintas. Slag Substitution as a Cementing Material in Concrete: Mechanical, Physical and Environmental Properties. Materials 2019, 12, 2845 .

AMA Style

María Eugenia Parron-Rubio, Francisca Perez-Garcia, Antonio Gonzalez-Herrera, Miguel José Oliveira, Maria Dolores Rubio-Cintas. Slag Substitution as a Cementing Material in Concrete: Mechanical, Physical and Environmental Properties. Materials. 2019; 12 (18):2845.

Chicago/Turabian Style

María Eugenia Parron-Rubio; Francisca Perez-Garcia; Antonio Gonzalez-Herrera; Miguel José Oliveira; Maria Dolores Rubio-Cintas. 2019. "Slag Substitution as a Cementing Material in Concrete: Mechanical, Physical and Environmental Properties." Materials 12, no. 18: 2845.

Journal article
Published: 16 January 2019 in Sustainability
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The selection of indicators for the Observatory of Sustainability of the Algarve Region for Tourism (OBSERVE), poses challenges, namely which indicators are relevant to stakeholders and how to assure that information is available. To support the selection of the environmental, sociocultural, economic and institutional indicators, an engagement process was designed and applied, which included meetings with stakeholders, a workshop and an online survey. The results showed that both workshop and online surveys reflected, in general, similar opinions, thus allowing the selecting of the sustainable development indicators for the Algarve region. Additionally, the results showed that nearly 75% of the indicators can be obtained from national statistics and, therefore, can be used on the OBSERVE project, assuring a quick flow of information. As limitations, it is important to mention that the other 25% will need further development, in order to provide data for indicators, like carbon management and client satisfaction. With this approach, the observatory will survey and evaluate the sustainable development of the region (status and trends), based on indicators that answer to the strategic needs of system’s main users, with social and economic implications, i.e., public institutions, economic agents, tourists, local communities and residents.

ACS Style

Fátima Farinha; Miguel José Oliveira; Elisa M. J. Silva; Rui Lança; Manuel Duarte Pinheiro; Cátia Miguel. Selection Process of Sustainable Indicators for the Algarve Region—OBSERVE Project. Sustainability 2019, 11, 444 .

AMA Style

Fátima Farinha, Miguel José Oliveira, Elisa M. J. Silva, Rui Lança, Manuel Duarte Pinheiro, Cátia Miguel. Selection Process of Sustainable Indicators for the Algarve Region—OBSERVE Project. Sustainability. 2019; 11 (2):444.

Chicago/Turabian Style

Fátima Farinha; Miguel José Oliveira; Elisa M. J. Silva; Rui Lança; Manuel Duarte Pinheiro; Cátia Miguel. 2019. "Selection Process of Sustainable Indicators for the Algarve Region—OBSERVE Project." Sustainability 11, no. 2: 444.

Proceedings article
Published: 04 September 2018 in Sustainable Development and Planning X
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ACS Style

Miguel José Oliveira; Alfredo Braga; Armando Inverno; Carlos Santos; Elisa M. J. Da Silva; Francisco Do Carmo; Luís Silva; Manuela Moreira Da Silva; Paulo Cabral; Pedro Sequeira; Rui Lança. SPOOLS: SUSTAINABLE POOLS – MAIN DEVELOPMENTS OF THE PROJECT. Sustainable Development and Planning X 2018, 1 .

AMA Style

Miguel José Oliveira, Alfredo Braga, Armando Inverno, Carlos Santos, Elisa M. J. Da Silva, Francisco Do Carmo, Luís Silva, Manuela Moreira Da Silva, Paulo Cabral, Pedro Sequeira, Rui Lança. SPOOLS: SUSTAINABLE POOLS – MAIN DEVELOPMENTS OF THE PROJECT. Sustainable Development and Planning X. 2018; ():1.

Chicago/Turabian Style

Miguel José Oliveira; Alfredo Braga; Armando Inverno; Carlos Santos; Elisa M. J. Da Silva; Francisco Do Carmo; Luís Silva; Manuela Moreira Da Silva; Paulo Cabral; Pedro Sequeira; Rui Lança. 2018. "SPOOLS: SUSTAINABLE POOLS – MAIN DEVELOPMENTS OF THE PROJECT." Sustainable Development and Planning X , no. : 1.

Conference paper
Published: 05 March 2018 in Libro de Comunicaciones / Livro das Comunicações
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Grande parte dos avanços verificados nos últimos anos na tecnologia do betão prendem-se com o uso de betões com muito baixas relações água/ligante. Nestes betões a retração total e, em particular, a retração autogénea tornaram-se fatores dominantes. A retração autogénea é já considerada como o “Tendão de Aquiles” dos betões de alta resistência/alto desempenho. Os betões autocompactáveis (BAC), devido à utilização de menores dosagens de agregado grosso e de maiores dosagens de pó também são incluídos no mesmo grupo. O BAC apresenta-se atualmente como um material que demonstrou ter um elevado potencial, nas áreas da produtividade, condições de trabalho e até mesmo em matérias resultantes das suas características intrínsecas. Nomeadamente, apresenta propriedades especiais, que justificam a sua preferência em muitas aplicações. No entanto, são conhecidos vários casos de comportamento inadequado, devido principalmente ao comportamento deficiente deste material durante o processo de hidratação e secagem. A retração tem uma importância significativa na conceção, dimensionamento, processo construtivo e comportamento em serviço das estruturas de betão. No entanto, não estão ainda completamente esclarecidos os mecanismos básicos a ela inerentes e a forma como interagem entre si. Os modelos de previsão existentes e exigências normativas específicas não consideram de forma adequada a influência dos fatores existentes. Além disso, a possibilidade de utilização de novos materiais limita fortemente a aplicação do conhecimento existente. Nesse sentido, e de modo contribuir para a resolução de uma das principais desvantagens do material betão autocompactável – a sua elevada retração, foi realizada uma extensa campanha de ensaios em provetes, tendo em vista a avaliação da respetiva retração. Entre outros materiais ou técnicas, foi dada especial importância à utilização de adjuvantes redutores de retração e adições expansivas. Com base nos resultados obtidos nos ensaios realizados, foi possível avaliar a eficiência da utilização dos materiais testados e estabelecer algumas limitações de utilização. Obtiveram-se melhoramentos significativos nas propriedades estudadas, que permitiram formular uma hierarquização das estratégias de mitigação da retração estudadas. Apresentam-se soluções técnicas satisfatórias, em termos de melhoramento de comportamento e viabilidade económica, recorrendo apenas a materiais disponíveis no mercado português. DOI: http://dx.doi.org/10.4995/HAC2018.2018.5191

ACS Style

Miguel José Oliveira; António Bettencourt Ribeiro; Fernando Garrido Branco. Estratégias de mitigação da retração em betões autocompactáveis. Libro de Comunicaciones / Livro das Comunicações 2018, 1 .

AMA Style

Miguel José Oliveira, António Bettencourt Ribeiro, Fernando Garrido Branco. Estratégias de mitigação da retração em betões autocompactáveis. Libro de Comunicaciones / Livro das Comunicações. 2018; ():1.

Chicago/Turabian Style

Miguel José Oliveira; António Bettencourt Ribeiro; Fernando Garrido Branco. 2018. "Estratégias de mitigação da retração em betões autocompactáveis." Libro de Comunicaciones / Livro das Comunicações , no. : 1.

Conference paper
Published: 06 January 2018 in INCREaSE
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Raw earth, while building material, constitutes unquestionably one of the most sustainable construction materials. Several construction technics exist over world using raw earth as basic material. In Portugal, it is possible to notice a rich heritage of buildings in raw earth, located throughout the country, but more spread on the South. The main vernacular techniques are rammed earth and adobe, but while the adobe technique suffered an evolution, rammed earth continues being used with no significant differences. It was conducted a research on earth building heritage throughout the Algarve region, especially in typological and dimensional terms, as well as structural and constructional aspects. Also, a research project focused in the characterization and in the quality control of compressed earth blocks [CEB], produced by the company “Terra Crua”, is being developed in the Civil Engineering Department of the Institute of Engineering of the University of Algarve. This company has great practical knowledge with raw earth construction using rammed earth assemblies since the seventies, with approximately one hundred buildings constructed, and with seven structures of CEB finished in the last two years. In this paper, some aspects of old and new earth buildings are presented, as well as the developments in the construction techniques and quality control of materials. The necessity to find constructive sustainable solutions explains the current demand for sophisticated construction with raw earth, aiming not only for new buildings but also for the conservation and rehabilitation of a valuable heritage.

ACS Style

Alfredo Manuel Braga; Miguel José Oliveira; Elisa M.J Silva; Luis Filipe Viana. Earth construction in the Algarve—Past and future. INCREaSE 2018, 543 -552.

AMA Style

Alfredo Manuel Braga, Miguel José Oliveira, Elisa M.J Silva, Luis Filipe Viana. Earth construction in the Algarve—Past and future. INCREaSE. 2018; ():543-552.

Chicago/Turabian Style

Alfredo Manuel Braga; Miguel José Oliveira; Elisa M.J Silva; Luis Filipe Viana. 2018. "Earth construction in the Algarve—Past and future." INCREaSE , no. : 543-552.

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

Matthias Eckert; Miguel Oliveira. Mitigation of the negative effects of recycled aggregate water absorption in concrete technology. Construction and Building Materials 2017, 133, 416 -424.

AMA Style

Matthias Eckert, Miguel Oliveira. Mitigation of the negative effects of recycled aggregate water absorption in concrete technology. Construction and Building Materials. 2017; 133 ():416-424.

Chicago/Turabian Style

Matthias Eckert; Miguel Oliveira. 2017. "Mitigation of the negative effects of recycled aggregate water absorption in concrete technology." Construction and Building Materials 133, no. : 416-424.