Download or read book Interface Influence on Moisture Transport in Building Components written by João M. P. Q. Delgado and published by Springer Nature. This book was released on 2019-09-10 with total page 62 pages. Available in PDF, EPUB and Kindle. Book excerpt: The knowledge of moisture migration inside building materials and construction building components is decisive for the way they behave when in use. The durability, waterproofing, degrading aspect and thermal behaviour of these materials are strongly influenced by the existence of moisture within their interior, which provoke changes in their normal performance, something that is normally hard to predict. Due to the awareness of this problem, the scientific community have per-formed various studies about the existence of moisture inside porous materials. The complex aspects of moisture migration phenomenon tended to encompass monolithic building elements, since the existence of joints or layers contributes to the change of moisture transfer along the respective building element that contribute to the change of mass transfer law. The presentation of an experimental analyses concerning moisture transfer in the interface of material that makes up masonry is described in such a way as to evaluate the durability and/or avoid building damages. In this work it was analysed, during the wetting process, the influence of different types of interface, commonly observed in masonry, such as: perfect con-tact, joints of cement mortar, lime mortar, and the air space interface. The results allow the calculation of the hygric resistance. With these results, it is possible to use any advanced hygrothermal simulation program to study the water transport in building elements, considering different interfaces and their hygric resistance.

Download or read book Drying Kinetics in Building Materials and Components written by João M. P. Q. Delgado and published by Springer Nature. This book was released on 2019-09-24 with total page 62 pages. Available in PDF, EPUB and Kindle. Book excerpt: This work presents an extensive experimental characterisation of two different ceramic brick blocks with different interface, at different heights, during the drying process. First, a laboratory characterization of the building material used (ceramic bricks and different mortars) is presented, showing their hygrothermal, mechanical and thermal properties, namely, bulk porosity and density, water vapour permeability, capillary absorption, retention curve, moisture diffusivity as a function of moisture content and thermal conductivity. Moreover, the moisture transfer in multi-layered systems was analysed in detail taking into account the interface contact between the building elements.

Download or read book Moisture Transport Across Interfaces Between Building Materials written by Xiaochuan Qiu and published by . This book was released on 2003 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis presents the results from a series of experiments in which moisture is transported across several bonded and natural contact interfaces between two materials, i.e. autoclaved aerated concrete (AAC) and mortar. All experimental results conclusively show that an assumption of perfect hydraulic contact is an over simplification of the interfacial phenomena. Instead, this thesis recommends "imperfect hydraulic contacts" in all situations, bonded as well as natural contact. Based on the above recommendation, this thesis introduces a concept of "mismatching resistance" to mathematically describe the imperfect contact. Physically it corresponds to a resistance offered by the interface to moisture transport due to misalignment of the pore structures on either side of the interface. A mathematical model of moisture transport was developed and the mismatching resistance was incorporated in it to account for interfacial phenomena. A numerical model was subsequently used to simulate moisture transport in building assemblies. The moisture transport experiments conducted with AAC and mortar were simulated with the numerical model. The results from the gamma ray measurements were used to optimize the mismatching resistance for each experimental situation. The mismatching resistance so optimized was found to depend on moisture content and also showed directionality. With one set of optimized mismatching resistances for each experimental situation, excellent agreement was found between the measured and simulated transient moisture distributions in all cases. This thesis also presents the results of a parametric study to investigate the sensitivity of predictions regarding material properties and interface imperfection. (Abstract shortened by UMI.).

Download or read book Concrete Structures New Trends and Old Pathologies written by João M. P. Q. Delgado and published by Springer Nature. This book was released on 2023-12-01 with total page 161 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a collection of recent research works related to new trends and pathologies associated with concrete structures, in order to contribute to the systematization and dissemination of knowledge related to moisture transport, durability, construction pathology, diagnostic techniques, and the most recent advances in this domain. The book is divided into five chapters that intend to be a resume of the current state of knowledge for benefit of professional colleagues, scientists, students, practitioners, lecturers, and other interested parties to network. At the same time, these topics will be going to the encounter of a variety of scientific and engineering disciplines, such as civil, mechanical, and materials engineering.

Download or read book Building Pathologies Experimental Campaigns and Numerical Procedures written by J. M. P. Q. Delgado and published by Springer Nature. This book was released on 2023-03-01 with total page 146 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a collection of recent research works related to building pathologies, in order to contribute to the systematization and dissemination of knowledge related to construction pathology, hygrothermal behavior of buildings, durability and diagnostic techniques and, simultaneously, show the most recent advances in this domain. It is divided into six chapters that intend to be a resume of the current state of knowledge for benefit of professional colleagues, scientists, students, practitioners, lecturers, and other interested parties to network. At the same time, this book encounters a variety of scientific and engineering disciplines, such as civil, mechanical, and materials engineering.

Download or read book Hygrothermal Behaviour and Building Pathologies written by J.M.P.Q. Delgado and published by Springer Nature. This book was released on 2020-07-13 with total page 158 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents recent research in the area of construction pathology, hygrothermal behaviour of buildings, service life and diagnostic techniques, and highlights the latest developments in building physics, hygrothermal behaviour, durability and numerical models applied to building materials analysis. Discussing the state of the art in the field, and covering topics relevant to variety of engineering disciplines, such as civil, materials and mechanical engineering, it will appeal to scientists, students, practitioners, lecturers and other stakeholders.

Download or read book Numerical Simulations written by Lutz Angermann and published by BoD – Books on Demand. This book was released on 2010-12-30 with total page 454 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book will interest researchers, scientists, engineers and graduate students in many disciplines, who make use of mathematical modeling and computer simulation. Although it represents only a small sample of the research activity on numerical simulations, the book will certainly serve as a valuable tool for researchers interested in getting involved in this multidisciplinary field. It will be useful to encourage further experimental and theoretical researches in the above mentioned areas of numerical simulation.

Download or read book Moisture and Buildings written by Arianna Brambilla and published by Woodhead Publishing. This book was released on 2021-05-28 with total page 201 pages. Available in PDF, EPUB and Kindle. Book excerpt: One in three homes, on average, suffer from excessive dampness and mould proliferation, with significant health and economic impacts. The combination of new construction methodologies, stricter airtightness requirements and the changing social and cultural context that influences the way we live inside buildings has created unprecedented challenges for the built environment. In modifying indoor and outdoor environments and the building envelopes that serve as a filter between the two, we are changing the physical parameters of the ways in which buildings behave and respond to climatic stimuli. Understanding and predicting the way in which buildings and moisture may interact should be an important step in the design process, aiming to minimise possible negative long-term consequences. Understanding and predicting the way in which buildings and moisture may interact is, today more than ever, essential yet difficult, as the experience of the past has lost its applicability. Moisture-related issues never have a simple solution, since they involve multiple factors, including design, construction, maintenance, materials, climate and occupation pattern. Thus, while the topic is attracting growing attention among researchers, designers and practitioners, the pace with which actual change is occurring is still too slow. Moisture and Buildings provides a critical overview of current research, knowledge and policy frameworks, and presents a comprehensive analysis of the implications of moisture and the importance of accounting for it during the design process. It responds to the urgent need for a systematic organization of the existing knowledge to identify research gaps and provide directions for future developments. The ultimate goal is to increase awareness of the multifaceted implications of hygrothermal phenomena and promote integrated design processes that lead to healthier and more durable constructions. Presents advanced knowledge on hygrothermal processes and their interaction with buildings Integrates the three key areas of moisture transport and its impact on buildings, including durability, human health and comfort Considers the most useful computational tools for assessing moisture and building interactions Includes a section on the main European, American and Australian building codes Explains the risks of mold growth to human health, including growth models to assessment methods

Download or read book Moisture Control Handbook written by Joseph Lstiburek and published by John Wiley & Sons. This book was released on 1996-01-15 with total page 230 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the climate-controlled buildings of today, moisture problemsaffect not only the useable life expectancy of the structure, butthe comfort and health of the occupants. This reference is thefirst to apply up-to-date moisture control and treatment techniquesin a problem/solution format. Opening with an introductoryexplanation of the nature and causes of mold, mildew, andcondensation, the book gives specific advice on heated, cooled, andcombination environments, plus a short course in the dynamics ofmoisture movement within buildings. Other invaluable coverageincludes: * clear, detailed recommended practices for all United Statesclimates * practices for cooling as well as heating climates (often, heatingclimate solutions are applied in cooling climates, where problemsand solutions are completely different) * an overall, systematic view of moisture problems--including howmechanical systems and occupant lifestyles can create and alsoresolve moisture problems * actual case studies of buildings with moisture problems thatillustrate the principles and practices presented in the book This detailed, no-nonsense exploration of moisture cause andeffect--as well as its protection and remediation--will expandreaders' knowledge on this crucial subject. Moisture ControlHandbook will be welcomed by building contractors, architects,mechanical engineers, building science researchers, buildingproduct manufacturers, homeowners, and small commercial buildingowners.

Download or read book Chemistry Emission Control Radioactive Pollution and Indoor Air Quality written by Nicolas Mazzeo and published by BoD – Books on Demand. This book was released on 2011-07-27 with total page 696 pages. Available in PDF, EPUB and Kindle. Book excerpt: The atmosphere may be our most precious resource. Accordingly, the balance between its use and protection is a high priority for our civilization. While many of us would consider air pollution to be an issue that the modern world has resolved to a greater extent, it still appears to have considerable influence on the global environment. In many countries with ambitious economic growth targets the acceptable levels of air pollution have been transgressed. Serious respiratory disease related problems have been identified with both indoor and outdoor pollution throughout the world. The 25 chapters of this book deal with several air pollution issues grouped into the following sections: a) air pollution chemistry; b) air pollutant emission control; c) radioactive pollution and d) indoor air quality.

Download or read book Moisture control in buildings written by Heinz R. Trechsel and published by ASTM International. This book was released on 1994 with total page 494 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Building Physics Heat Air and Moisture written by Hugo S. L. Hens and published by John Wiley & Sons. This book was released on 2012-10-04 with total page 337 pages. Available in PDF, EPUB and Kindle. Book excerpt: Note: New editions of this book have been published: the 3rd edition in 2017, and the 4th edition in September 2023. Bad experiences with construction quality, the energy crises of 1973 and 1979, complaints about 'sick buildings', thermal, acoustical, visual and olfactory discomfort, the need for good air quality, the move towards more sustainability, all have accelerated the development of a field, which until some 40 years ago was hardly more than an academic exercise: building physics. Building physics combines several knowledge domains such as heat and mass transfer, building acoustics, lighting, indoor environmental quality and energy efficiency. In some countries, also fire safety is included. Through the application of existing physical knowledge and the combination with information coming from other disciplines, the field helps to understand the physical phenomena governing assembly, building envelope, whole building and built environment performance, although for the last the wording "urban physics" is used. Building physics has a true impact on performance based building design. This volume focuses on heat, air, moisture transfer and its usage in building engineering applications.

Download or read book Proceedings of the 75th RILEM Annual Week 2021 written by J. Ivan Escalante-Garcia and published by Springer Nature. This book was released on 2023-03-10 with total page 1029 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume gathers the latest advances, innovations and applications in the field of sustainable construction materials and structures, as presented by leading international researchers and engineers at the 75th RILEM Annual Week (75RW 2021), held in Merida, Mexico on August 29 – September 3, 2021. It covers topics such as supplementary cementitious materials, durability and Life Cycle assessment in urban and marine conditions, additive manufacturing of concrete in construction, structural performance and design, non-Portland cements and Alkali activated cementitious materials and eco-concrete, cultural heritage, non-destructive testing techniques, bituminous materials, and construction materials (polymers, timber, bamboo, recycling and masonry). The contributions, which were selected through a rigorous international peer-review process, share exciting ideas that will spur novel research directions and foster new multidisciplinary collaborations.

Download or read book Drying and Wetting of Building Materials and Components written by J.M.P.Q. Delgado and published by Springer. This book was released on 2014-06-19 with total page 216 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book, Drying and Wetting of Building Materials and Components, provides a collection of recent contributions in the field of drying and wetting in porous building materials. The main benefit of the book is that it discusses some of the most important topics related to the drying and wetting processes, namely, innovations and trends in drying science and technology, drying mechanism and theory, equipment, advanced modelling, complex simulation and experimentation. At the same time, these topics will be going to the encounter of a variety of scientific and engineering disciplines. The book is divided in several chapters that intend to be a resume of the current state of knowledge for benefit of professional colleagues.

Download or read book Building Performance Simulation for Design and Operation written by Jan L.M. Hensen and published by Routledge. This book was released on 2019-04-24 with total page 958 pages. Available in PDF, EPUB and Kindle. Book excerpt: When used appropriately, building performance simulation has the potential to reduce the environmental impact of the built environment, to improve indoor quality and productivity, as well as to facilitate future innovation and technological progress in construction. Since publication of the first edition of Building Performance Simulation for Design and Operation, the discussion has shifted from a focus on software features to a new agenda, which centres on the effectiveness of building performance simulation in building life cycle processes. This new edition provides a unique and comprehensive overview of building performance simulation for the complete building life cycle from conception to demolition, and from a single building to district level. It contains new chapters on building information modelling, occupant behaviour modelling, urban physics modelling, urban building energy modelling and renewable energy systems modelling. This new edition keeps the same chapter structure throughout including learning objectives, chapter summaries and assignments. Moreover, the book: • Provides unique insights into the techniques of building performance modelling and simulation and their application to performance-based design and operation of buildings and the systems which service them. • Provides readers with the essential concepts of computational support of performance-based design and operation. • Provides examples of how to use building simulation techniques for practical design, management and operation, their limitations and future direction. It is primarily intended for building and systems designers and operators, and postgraduate architectural, environmental or mechanical engineering students.

Download or read book Durability of Building Materials and Components written by Vasco Peixoto de de Freitas and published by Springer Science & Business Media. This book was released on 2013-07-16 with total page 277 pages. Available in PDF, EPUB and Kindle. Book excerpt: Durability of Building Materials and Components provides a collection of recent research works to contribute to the systematization and dissemination of knowledge related to the long-term performance and durability of construction and, simultaneously, to show the most recent advances in this domain. It includes a set of new developments in the field of durability, service life prediction methodologies, the durability approach for historical and old buildings, asset and maintenance management and on the durability of materials, systems and components. The book is divided in several chapters that intend to be a resume of the current state of knowledge for benefit of professional colleagues.

Download or read book Adhesion in Layered Cement Composites written by Łukasz Sadowski and published by Springer. This book was released on 2018-12-12 with total page 163 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book discusses how to identify the level of adhesion in layered systems made of cement composites using a multi-scale approach based on experimental and numerical analyses. In particular, it explains 1. The suitability of previously used artificial intelligence tools and learning algorithms for reliable assessment of the level of adhesion of layered systems made of cement composites based on non-destructive tests 2. The development of the methodology for a reliable non-destructive evaluation of the level of adhesion in newly constructed layered systems of any overlay thickness and in existing layered systems made of cement composites 3. How to determine whether to assess the level of adhesion of the layered systems, and discusses the amplitude parameters, spatial, hybrid and volume parameters describing the morphology of the concrete substrate surface in the mesoscale 4. How to ascertain whether the effective surface area of the existing concrete substrate and the contribution of the exposed aggregate on this substrate, determined in mesoscale, have an impact on the level of adhesion of layered systems made of cement composites 5. The assessment of the structure of air pores in the microscale and the chemical composition of the cement composite on the nanoscale in the interphase zone together with the determination of their impact on the level of adhesion of layered systems made of cement composites 6. The development of an effective methodology for testing the level of adhesion of layered systems made of cement composites in a multi-scale approach, including the research methods and descriptors used.