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"Service life"
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Spiritual diversity in social work practice : the heart of helping
\"The first edition of this book (1999, Free Press) provided the first comprehensive framework of knowledge, values, and skills for addressing spiritual diversity in social work at a time when this topic was little known or accepted. The second edition (2010, Oxford University Press) was revised and expanded to reflect the significant growth of interest in spirituality within social work and other helping professions, in the USA and around the world. This third edition builds on that foundation and much expanded multidisciplinary and international work on the topic during the past eight years, including our own. In particular, this edition includes case examples and insights from a new third author, Hwi-Ja Canda, based on her 30 years of experience as a social work practitioner, in order to make the professional applications of our framework even more vivid and practical. The main new features of the third edition are: - Reorganization of content to enhance flow of ideas and guidelines for practice, including expansion of content on assessment and practice with two added chapters in Part III - Twice as many case examples and vignettes from personal and professional experiences, organized into 40 Scenarios throughout the book - Significantly expanded transdisciplinary literature review throughout the book - Increased integration of the strengths perspective throughout - Increase of international perspective, including analysis of worldwide professional codes of ethics - More exercises to engage the reader in personal and professional growth - Significant refinements of sections on human diversity, religious perspectives, and addition of 12 Steps perspective in Part II\"-- Provided by publisher.
Life cycle assessment in the built environment
by
Crawford, Robert
in
Building materials
,
Building materials -- Recycling
,
Building materials -- Service life
2011
Life cycle assessment enables the identification of a broad range of potential environmental impacts occurring across the entire life of a product, from its design through to its eventual disposal or reuse. The need for life cycle assessment to inform environmental design within the built environment is critical, due to the complex range of materials and processes required to construct and manage our buildings and infrastructure systems.
After outlining the framework for life cycle assessment, this book uses a range of case studies to demonstrate the innovative input-output-based hybrid approach for compiling a life cycle inventory. This approach enables a comprehensive analysis of a broad range of resource requirements and environmental outputs so that the potential environmental impacts of a building or infrastructure system can be ascertained. These case studies cover a range of elements that are part of the built environment, including a residential building, a commercial office building and a wind turbine, as well as individual building components such as a residential-scale photovoltaic system.
Comprehensively introducing and demonstrating the uses and benefits of life cycle assessment for built environment projects, this book will show you how to assess the environmental performance of your clients' projects, to compare design options across their entire life and to identify opportunities for improving environmental performance.
Quantification of the Service Life Extension and Environmental Benefit of Chloride Exposed Self-Healing Concrete
by
Van Belleghem, Bjorn
,
Van den Heede, Philip
,
Van Tittelboom, Kim
in
Assessments
,
Chlorides
,
Concrete
2016
Formation of cracks impairs the durability of concrete elements. Corrosion inducing substances, such as chlorides, can enter the matrix through these cracks and cause steel reinforcement corrosion and concrete degradation. Self-repair of concrete cracks is an innovative technique which has been studied extensively during the past decade and which may help to increase the sustainability of concrete. However, the experiments conducted until now did not allow for an assessment of the service life extension possible with self-healing concrete in comparison with traditional (cracked) concrete. In this research, a service life prediction of self-healing concrete was done based on input from chloride diffusion tests. Self-healing of cracks with encapsulated polyurethane precursor formed a partial barrier against immediate ingress of chlorides through the cracks. Application of self-healing concrete was able to reduce the chloride concentration in a cracked zone by 75% or more. As a result, service life of steel reinforced self-healing concrete slabs in marine environments could amount to 60–94 years as opposed to only seven years for ordinary (cracked) concrete. Subsequent life cycle assessment calculations indicated important environmental benefits (56%–75%) for the ten CML-IA (Center of Environmental Science of Leiden University–Impact Assessment) baseline impact indicators which are mainly induced by the achievable service life extension.
Journal Article
Packing up : further adventures of a trailing spouse
In the continuing adventures of Brigid Keenan, the \"trailing spouse\" of a diplomat, we find her dealing with life in Kazakhstan, navigating her daughters' weddings, coping with a cancer diagnosis, and getting a crash course in grandmotherhood, while facing up to her greatest challange yet: retirement.
Durability of an Epoxy Resin and Its Carbon Fiber- Reinforced Polymer Composite upon Immersion in Water, Acidic, and Alkaline Solutions
by
Liu, Xiaoling
,
Uthaman, Arya
,
Wang, Yunjia
in
Aging
,
Carbon fiber reinforced plastics
,
Carbon fiber reinforcement
2020
The usage of polymer composites in various engineering fields has increased. However, the long-term service performance of such materials under aggressive conditions is still poorly understood, which limits the development of safe and economically effective designs. In this study, the aging of an epoxy resin and its carbon fiber-reinforced polymer (CFRP) composites upon immersion in water, acidic, and alkaline solutions was evaluated at different temperatures. The service life of the CFRP composites under various conditions could be predicted by the Arrhenius theory. The thermal and mechanical analysis results indicated that the CFRP composites were more vulnerable to HCl owing to the higher moisture absorption and diffusion of HCl into their cracks. The scanning electron microscopy results showed that the polymer matrix was damaged and degraded. Therefore, to allow long-term application, CFRP composites must be protected from acidic environments.
Journal Article
Service Life Prediction of High-Performance and Ultra‑High-Performance Concrete Structures with Corrosion-Resistant Steels
2024
This study reviewed, synthesized, and extended the service life prediction models for conventional reinforced concrete (RC) structures to those with advanced concrete materials (that is, high-performance-concrete [HPC] and ultra-high-performance concrete [UHPC]), and corrosion-resistant steel reinforcements (that is, epoxy-coated [EC] steel, high chromium [HC] steel, and stainless-steel [SS]) subjected to chloride attack. The developed corrosion initiation and propagation models were validated using field and experimental data from literature. A case study was performed to compare the corrosion initiation and propagation times, and service life of RC structures with different concretes and reinforcements in various environments. It was found that UHPC structures surpassed 100 years of service life in all studied environments. HPC enhanced the service life of conventional normal-strength concrete (NC) structures by over three times. In addition, the use of corrosion-resistant reinforcement prolonged the service life of RC structures. The use of HC steel or epoxy-coated steel doubled the service life in both NC and HPC. SS reinforcement yielded service lives exceeding 100 years in all concrete types, except for NC structures in marine tidal zones, which showed an 88-year service life. Keywords: corrosion; corrosion-resistant steel reinforcement; high-performance concrete (HPC); service life prediction; ultra-high-performance concrete (UHPC).
Journal Article
Evaluating the impact of material service life on embodied energy of residential villas in the United Arab Emirates
by
Crawford, Robert H.
,
Attoye, Daniel Efurosibina
,
Rauf, Abdul
in
Bibliometrics
,
Building materials
,
Buildings
2024
PurposeRecently, there has been a shift toward the embodied energy assessment of buildings. However, the impact of material service life on the life-cycle embodied energy has received little attention. We aimed to address this knowledge gap, particularly in the context of the UAE and investigated the embodied energy associated with the use of concrete and other materials commonly used in residential buildings in the hot desert climate of the UAE.Design/methodology/approachUsing input–output based hybrid analysis, we quantified the life-cycle embodied energy of a villa in the UAE with over 50 years of building life using the average, minimum, and maximum material service life values. Mathematical calculations were performed using MS Excel, and a detailed bill of quantities with >170 building materials and components of the villa were used for investigation.FindingsFor the base case, the initial embodied energy was 57% (7390.5 GJ), whereas the recurrent embodied energy was 43% (5,690 GJ) of the life-cycle embodied energy based on average material service life values. The proportion of the recurrent embodied energy with minimum material service life values was increased to 68% of the life-cycle embodied energy, while it dropped to 15% with maximum material service life values.Originality/valueThe findings provide new data to guide building construction in the UAE and show that recurrent embodied energy contributes significantly to life-cycle energy demand. Further, the study of material service life variations provides deeper insights into future building material specifications and management considerations for building maintenance.
Journal Article