DICPI - Artículos
https://hdl.handle.net/10481/19659
2024-03-28T19:24:35ZBuilding the Foundation for a Necessary Debate: Projectification of Society
https://hdl.handle.net/10481/81880
Building the Foundation for a Necessary Debate: Projectification of Society
Moreno Escobar, María Begoña; Martínez Montes, Germán; El Hajj, Claudette
Projectification is the phenomenon whereby activities traditionally carried out in a functional
manner are approached as projects. It also includes the transformation processes of organisations as
project management and non-functional structures. It is a phenomenon that has become important
in recent years. It has brought great benefits to organisations and public administration, and it has
optimised the use of economic resources. On the other hand, projectification also brings undesirable
effects, known as the dark side of projectification. Several years after the first time projectification
was coined, a deep debate about projectification has been necessary to make the most of all possible
levels. This research, through a bibliometric analysis and a review of the most outstanding literature,
identifies those aspects that need to be discussed and where there is room for improvement. The
results, with an important set of disadvantages of projectification, sometimes not taken into account,
especially at the individual level, establish a solid basis for the debate on projectification and the
possible points of improvement from all perspectives (individual, organisational and societal). These
perspectives should be observed as different but complementary, forming a holistic understanding
of projectification.
The effect of different treatments on abaca fibers used in cementitious composites
https://hdl.handle.net/10481/81380
The effect of different treatments on abaca fibers used in cementitious composites
Alcivar-Bastidas, S.; Petroche, Daniel M; Martínez-Echevarría Romero, María José
The use of natural fibers including abaca has increased because of its
advantages such as lightweight, low price, life-cycle superiority, and substi tute for synthetic fibers. This paper gives an insight into the effect of three
different treatments on abaca fibers: hornification, NaOH 3% concentration
solution, and a coating of silica fume with natural latex into cementitious
composites; fibers have been characterized before and after through SEM,
XRD, FT-IR, TGA, and tensile tests to analyze structural and chemical changes.
Cementitious composites through setting time and flexural strength (7, 14,
28 days) were analyzed for determining the optimum treatment and, after ward, the best dosage and length. It was found that HS treatment with 30
mm and 0.2% dosage showed 8.2 MPa in terms of flexural strength
Understanding the influence of filler type and asphalt binder content on the moisture and fatigue resistance of asphalt mortars
https://hdl.handle.net/10481/79180
Understanding the influence of filler type and asphalt binder content on the moisture and fatigue resistance of asphalt mortars
Tauste Martínez, Raúl; Hidalgo, A. E.; García, G. M.; Moreno Navarro, Fernando Manuel; Rubio Gámez, María Del Carmen
An adequate moisture resistance is a key element to guarantee the durability of asphalt materials. This paper identifies the influence of filler typology and bitumen content on the mechanical response of asphalt mortars before and after water action. Two fillers were evaluated: Portland cement and Calcium carbonate, along with different contents of a penetration bitumen (B35/50). Stiffness, ductility, and fatigue were evaluated through a new protocol for asphalt mortar samples using a 3-point-bending test on DMA (Dynamic Mechanical Analyzer). The use of Portland cement presents higher stiffness, lower ductility, and improved fatigue and water resistance compared to Calcium carbonate. It is also possible to optimize bitumen content based on fatigue results. Content beyond the optimal reduce variations after water action but compromise fatigue resistance. Lower content leads to a poorer performance in both terms. This methodology enables asphalt mortar characterisation as a tool to optimise the design of asphalt materials.; La influencia del tipo de polvo mineral y contenido de ligante bituminoso en la resistencia a la humedad y fatiga de morteros bituminosos. La resistencia al agua es clave para garantizar la durabilidad de los materiales asfálticos. Este estudio identifica la influencia del polvo mineral y contenido de betún en la respuesta mecánica de morteros bituminosos antes y después de la humedad. Se evaluaron dos tipos de filler: cemento Portland y carbonato cálcico (filler calizo), junto con distintos contenidos de betún (B35/50). Rigidez, ductilidad y fatiga fueron evaluados mediante un nuevo ensayo de fatiga a tres puntos para morteros empleando DMA (Dynamic Mechanical Analyzer). El cemento presenta más rigidez, menos ductilidad y mayor resistencia al agua y fatiga que el filler calizo. Los resultados de fatiga permiten además optimizar el contenido de betún. Contenidos por encima del óptimo reducen variaciones tras la humedad pero comprometen la resistencia a fatiga. Contenidos menores conllevan un peor comportamiento en ambos términos. Esta metodología permite usar la caracterización de morteros bituminosos para optimizar el diseño de materiales asfálticos.
Analysis of the Real Performance of Crumb-Rubber-Modified Asphalt Mixtures
https://hdl.handle.net/10481/79056
Analysis of the Real Performance of Crumb-Rubber-Modified Asphalt Mixtures
Sierra Carrillo de Albornoz, Francisco Javier; Moreno Navarro, Fernando Manuel; Rubio Gámez, María Del Carmen
The main goal of this study is to evaluate the field performance of crumb-rubber-modified
asphalt mixtures used as a surface layer on high-volume traffic roads. For this purpose, several road
sections were constructed under different climate conditions and using control mixtures (manufactured
with traditional SBS polymer-modified binders) and crumb-rubber-modified mixtures. After
the construction of the different road sections, cores were taken at different periods of their service
life (up to 63 months) and they were tested in the laboratory in order to assess the evolution of the
density, stiffness and fatigue resistance of the layers. Based on the results obtained from tests, it can
be concluded that under real severe traffic and climate conditions, asphalt mixtures manufactured
with crumb-rubber-modified bitumen offer ageing and mechanical performance very similar to that
offered by asphalt mixtures manufactured with traditional SBS-modified bitumen. Based on these
considerations, this application can be an interesting solution to minimize environmental problems
caused by end-of-life tires in landfills.
Monitoring and Assessment of Indoor Environmental Conditions in Educational Building Using Building Information Modelling Methodology
https://hdl.handle.net/10481/78277
Monitoring and Assessment of Indoor Environmental Conditions in Educational Building Using Building Information Modelling Methodology
Aguilar Aguilera, Antonio Jesús; De la Hoz Torres, María Luisa; Ruiz Padillo, Diego Pablo; Martínez Aires, María Dolores
Managing indoor environmental quality (IEQ) is a challenge in educational buildings in the
wake of the COVID-19 pandemic. Adequate indoor air quality is essential to ensure that indoor spaces
are safe for students and teachers. In fact, poor IEQ can affect academic performance and student
comfort. This study proposes a framework for integrating occupants’ feedback into the building
information modelling (BIM) methodology to assess indoor environmental conditions (thermal,
acoustic and lighting) and the individual airborne virus transmission risk during teaching activities.
The information contained in the parametric 3D BIM model and the algorithmic environment of
Dynamo were used to develop the framework. The IEQ evaluation is based on sensor monitoring
and a daily schedule, so the results show real problems of occupants’ dissatisfaction. The output of
the framework shows in which range the indoor environmental variables were (optimal, acceptable
and unacceptable) and the probability of infection during each lecture class (whether or not 1% is
exceeded). A case study was proposed to illustrate its application and validate it. The outcomes
provide key information to support the decision-making process for managing IEQ and controlling
individual airborne virus transmission risks. Long-term application could provide data that support
the management of ventilation strategies and protocol redesign.