Download or read book Acoustic and Thermal Properties of Recycled Porous Media written by Sararat Mahasaranon and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis is concerned with developing porous materials from tyre shred residue and polyurethane binder for acoustic absorption and thermal insulation applications. The resultant materials contains a high proportion of open, interconnected cells that are able to absorb incident sound waves through viscous friction, inertia effects and thermal energy exchanges. The materials developed are also able to insulate against heat by suppressing the convection of heat and reduced conductivity of the fluid locked in the large proportion of close-cell pores. The acoustic absorption performance of a porous media is controlled by the number of open cells and pore size distribution. Therefore, this work also investigates the use of catalysts and surfactants to modify the pore structure and studies the influence of the various components in the chemical formulations used to produce these porous materials. An optimum type and amounts of catalyst are selected to obtain a high chemical conversion and a short expanding time for the bubble growth phase. The surfactant is used to reduce the surface tension and achieve a homogenous mixing between the solid particulates tyre shred residue, the water, the catalyst and the binder. It is found that all of the components significantly affect the resultant materials structure and its morphology. The results show that the catalyst has a particularly strong effect on the pore structure and the ensuing thermal and acoustical properties. In this research, the properties of the porous materials developed are characterized using standard experimental techniques and the acoustic and thermal insulation performance underpinned using theoretical models. The important observation from this research is that a new class of recycled materials with pore stratification has been developed. It is shown that the pore stratification can have a positive effect on the acoustic absorption in a broadband frequency range. The control of reaction time in the foaming process is a key function that leads to a gradual change in the pore size distribution, porosity, flow resistivity and tortuosity which vary as a function of sample depth. It is shown that the Pade approximation is a suitable model to study the acoustic behaviour of these materials. A good agreement between the measured data and the model was attained.

Download or read book Propagation of Sound in Porous Media written by J.F. Allard and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book has grown out of the research activities of the author in the fields of sound propagation in porous media and modelling of acoustic materials. It is assumed that the reader has a background of advanced calculus, including an introduction to differential equations, complex variables and matrix algebra. A prior exposure to theory of elasticity would be advantageous. Chapters 1-3 deal with sound propagation of plane waves in solids and fluids, and the topics of acoustic impedance and reflection coefficient are given a large emphasis. The topic of flow resistivity is presented in Chapter 2. Chapter 4 deals with sound propagation in porous materials having cylindrical pores. The topics of effective density, and of tortuosity, are presented. The thermal exchanges between the frame and the fluid, and the behaviour of the bulk modulus of the fluid, are described in this simple context. Chapter 5 is concerned with sound propagation in other porous materials, and the recent notions of characteristic dimensions, which describe thermal exchanges and the viscous forces at high frequencies, are introduced. In Chapter 6, the case of porous media having an elastic frame is considered in the context of Biot theory, where new topics described in Chapter 5 have been included.

Download or read book New Trends in Eco efficient and Recycled Concrete written by Jorge de Brito and published by Woodhead Publishing. This book was released on 2018-11-16 with total page 632 pages. Available in PDF, EPUB and Kindle. Book excerpt: New Trends in Eco-efficient and Recycled Concrete describes different recycled materials that have been used in eco-efficient concrete, reviewing previous publications to identify the most effective recycled materials to be applied in concrete manufacture. New trends on eco-efficient concrete are presented, filling a gap in the market. Sections cover various recycled materials applied in concrete production, present the latest on the lifecycle analysis of recycled aggregate concrete, detail new trends in recycled aggregate concrete research, and finally, present updates on upscaling the use of recycled aggregate concrete and structural reliability. Focuses on new trends in recycled aggregate concrete and its applications (rather than the more subjective ‘sustainability’ aspects) Contains very important contributions from researchers in eco-efficient concrete, including Chi Sun Poon, Jorge de Brito, Valeria Corinaldesi, Francisco Agrela, etc. Presents a ‘one stop’ reference for a graduate course on sustainable construction

Download or read book Porous Materials written by Peisheng Liu and published by Elsevier. This book was released on 2014-08-12 with total page 577 pages. Available in PDF, EPUB and Kindle. Book excerpt: Engineers and scientists alike will find this book to be an excellent introduction to the topic of porous materials, in particular the three main groups of porous materials: porous metals, porous ceramics, and polymer foams. Beginning with a general introduction to porous materials, the next six chapters focus on the processing and applications of each of the three main materials groups. The book includes such new processes as gel-casting and freeze-drying for porous ceramics and self-propagating high temperature synthesis (SHS) for porous metals. The applications discussed are relevant to a wide number of fields and industries, including aerospace, energy, transportation, construction, electronics, biomedical and others. The book concludes with a chapter on characterization methods for some basic parameters of porous materials. Porous Materials: Processing and Applications is an excellent resource for academic and industrial researchers in porous materials, as well as for upper-level undergraduate and graduate students in materials science and engineering, physics, chemistry, mechanics, metallurgy, and related specialties. A comprehensive overview of processing and applications of porous materials – provides younger researchers, engineers and students with the best introduction to this class of materials Includes three full chapters on modern applications - one for each of the three main groups of porous materials Introduces readers to several characterization methods for porous materials, including methods for characterizing pore size, thermal conductivity, electrical resistivity and specific surface area

Download or read book Vegetable Fiber Composites and their Technological Applications written by Mohammad Jawaid and published by Springer Nature. This book was released on 2021-08-18 with total page 486 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book explores vegetable fiber composite as an eco-friendly, biodegradable, and sustainable material that has many potential industrial applications. The use of vegetable fiber composite supports the sustainable development goals (SDGs) to utilize more sustainable and greener composite materials, which are also easy to handle and locally easily available with economical production costs. This book presents various types of vegetable fiber composite and its processing methods and treatments to obtain desirable properties for certain applications. The book caters to researchers and students who are working in the field of bio-composites and green materials.

Download or read book Handbook Of Porous Materials Synthesis Properties Modeling And Key Applications In 4 Volumes written by and published by World Scientific. This book was released on 2020-10-20 with total page 1495 pages. Available in PDF, EPUB and Kindle. Book excerpt: This four-volume handbook gives a state-of-the-art overview of porous materials, from synthesis and characterization and simulation all the way to manufacturing and industrial applications. The editors, coming from academia and industry, are known for their didactic skills as well as their technical expertise. Coordinating the efforts of 37 expert authors in 14 chapters, they construct the story of porous carbons, ceramics, zeolites and polymers from varied viewpoints: surface and colloidal science, materials science, chemical engineering, and energy engineering. Volumes 1 and 2 cover the fundamentals of preparation, characterisation, and simulation of porous materials. Working from the fundamentals all the way to the practicalities of industrial production processes, the subjects include hierarchical materials, in situ and operando characterisation using NMR, X-Ray scattering and tomography, state-of-the-art molecular simulations of adsorption and diffusion in crystalline nanoporous materials, as well as the emerging areas of bio-artificing and drug delivery. Volume 3 focuses on porous materials in industrial separation applications, including adsorption separation, membrane separation, and osmotic distillation. Finally, and highly relevant to tomorrow's energy challenges, Volume 4 explains the energy engineering aspects of applying porous materials in supercapacitors, fuel cells, batteries, electrolysers and sub-surface energy applications.The text contains many high-quality colourful illustrations and examples, as well as thousands of up-to-date references to peer-reviewed articles, reports and websites for further reading. This comprehensive and well-written handbook is a must-have reference for universities, research groups and companies working with porous materials.Related Link(s)

Download or read book Propagation of Sound in Porous Media written by J.F. Allard and published by Springer. This book was released on 2012-01-07 with total page 300 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book has grown out of the research activities of the author in the fields of sound propagation in porous media and modelling of acoustic materials. It is assumed that the reader has a background of advanced calculus, including an introduction to differential equations, complex variables and matrix algebra. A prior exposure to theory of elasticity would be advantageous. Chapters 1-3 deal with sound propagation of plane waves in solids and fluids, and the topics of acoustic impedance and reflection coefficient are given a large emphasis. The topic of flow resistivity is presented in Chapter 2. Chapter 4 deals with sound propagation in porous materials having cylindrical pores. The topics of effective density, and of tortuosity, are presented. The thermal exchanges between the frame and the fluid, and the behaviour of the bulk modulus of the fluid, are described in this simple context. Chapter 5 is concerned with sound propagation in other porous materials, and the recent notions of characteristic dimensions, which describe thermal exchanges and the viscous forces at high frequencies, are introduced. In Chapter 6, the case of porous media having an elastic frame is considered in the context of Biot theory, where new topics described in Chapter 5 have been included.

Download or read book Acoustic Textiles written by Rajiv Padhye and published by Springer. This book was released on 2016-10-26 with total page 245 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book highlights the manufacturing and applications of acoustic textiles in various industries. It also includes examples from different industries in which acoustic textiles can be used to absorb noise and help reduce the impact of noise at the workplace. Given the importance of noise reduction in the working environment in several industries, the book offers a valuable guide for companies, educators and researchers involved with acoustic materials.

Download or read book Green Composites written by Caroline Baillie and published by Elsevier. This book was released on 2004-09-01 with total page 321 pages. Available in PDF, EPUB and Kindle. Book excerpt: There is an increasing movement of scientists and engineers who are dedicated to minimising the environmental impact of polymer composite production. Life cycle assessment is of paramount importance at every stage of a product’s life, from initial synthesis through to final disposal and a sustainable society needs environmentally safe materials and processing methods. With an internationally recognised team of contributors, Green Composites examines fibre reinforced polymer composite production and explains how environmental footprints can be diminished at every stage of the life cycle.The introductory chapters look at why we should consider green composites, their design and life cycle assessment. The properties of natural fibre sources such as cellulose and wood are then discussed. Chapter 6 examines recyclable synthetic fibre-thermoplastic composites as an alternative solution and polymers derived from natural sources are covered in Chapter 7. The factors that influence the properties of these natural composites and natural fibre thermoplastic composites are detailed in Chapters 8 and 9. The final four chapters consider clean processing, applications, recycling, degradation and reprocessing.Green composites is an essential guide for agricultural crop producers, government agricultural departments, automotive companies, composite producers and material scientists all dedicated to the promotion and practice of eco-friendly materials and production methods. Reviews fibre reinforced polymer composite production Explains how environmental footprints can be diminished at every stage of the life-cycle

Download or read book Proceedings of the 4th International Seminar on Science and Technology ISST 2022 written by Nov Irmawati Inda and published by Springer Nature. This book was released on 2023-08-21 with total page 396 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is an open access book. ISST is an annual seminar organized regularly by Faculty of Mathematics and Natural Sciences, Tadulako University since 2018 in collaboration with University of Newcastle (Australia), University of Miyazaki (UoM), Physics Society of Indonesia, Indonesian Chemical Society (HKI) and Indonesian Mathematical Society (IndoMS). International seminar on science and technology aims to provide a high-level international forum for leading academicians, researchers, scientists, students, scholars, and practitioners to share the state of the art of knowledges, experiences, researches and applications on the aspect of advancement in Mathematics, Physics and Chemistry field. It is also serves to foster communication among academicians, researchers, scientists, students, scholars, and practitioners working in a wide variety of scientific areas with a common interest in improving science and technology in the field of mathematics, physics, and chemistry. Furthermore, this seminar can provide a premier interdisciplinary platform for academicians, researchers, scientists, students, scholars, and practitioners to present and discuss the most recent innovations, trends, and concerns as well as practical challenges encountered and solutions adopted in the fields of Mathematics, Physics and Chemistry. This seminar has been virtually held since 2020 due to covid-19 pandemic and is continuing to hold virtually following the advice and guidelines from government. However, due to the antusiasm of participants to attend the seminar “face to face”, hence this seminar will be held using hybrid style seminar by following healthcare guideline for covid-19.

Download or read book Trends in Manufacturing and Engineering Management written by S. Vijayan and published by Springer Nature. This book was released on 2020-08-19 with total page 1114 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book comprises select papers presented at the International Conference on Mechanical Engineering Design (ICMechD) 2019. The volume focuses on the different design aspects involved in manufacturing, composite materials processing as well as in engineering management. A wide range of topics such as control and automation, mechatronics, robotics, composite and nanomaterial design, and welding design are covered here. The book also discusses current research in engineering management on topics like products, services and system design, optimization in design, manufacturing planning and control, and sustainable product design. Given the range of the contents, this book will prove useful to students, researchers and practitioners.

Download or read book Materials and Contact Characterisation IX written by S. Hernández and published by WIT Press. This book was released on 2019-07-23 with total page 287 pages. Available in PDF, EPUB and Kindle. Book excerpt: Including papers from the 9th edition of the International Conference on Computational Methods and Experiments in Material and Contact Characterisation this volume presents the work of selected researchers on the subject. Material and contact characterisation is a rapidly advancing field and this volume contains the latest research. Of particular interest to industry and society is the knowledge of surface treatment and contact mechanics of these materials to determine the in-service behaviour of components subject to contact conditions. Modern society requires systems that operate at conditions that use resources effectively. In terms of components durability, the understanding of surface engineering wear frictional and lubrication dynamics has never been so important. Current research is focussed on modification technologies that can increase the surface durability of materials. The characteristics of the system reveal which surface engineering methods should be chosen and as a consequence it is essential to study the combination of surface treatment and contact mechanics. The accurate characterisation of the physical and chemical properties of materials requires the application of both experimental techniques and computer simulation methods in order to gain a correct analysis. A very wide range of materials, starting with metals through polymers and semiconductors to composites, necessitates a whole spectrum of characteristic experimental techniques and research methods. The papers in the book cover a number of topics, including: Computer methods and simulation; Experimental and measurement techniques; Mechanical characterisation and testing; Materials under extreme conditions; Polymers and plastics; Advances in composites; Micro and macro characterisation; Corrosion and erosion; Damage, fatigue and fracture; Recycled materials; Materials and energy; Surface problems and contact mechanics; Surface modification and treatments; Thick and thin coatings; Tribomechanics and wear mechanics; Biomechanical characterisation; Biomechanical applications and Case studies.

Download or read book Building Decorative Materials written by Yan Li and published by Elsevier. This book was released on 2011-05-09 with total page 424 pages. Available in PDF, EPUB and Kindle. Book excerpt: Buildings should not only be functional but aesthetically pleasing. This requires the use of decorative materials both on the exterior and inside a building. Building decorative materials reviews the range of materials available and their potential applications. The book begins by considering the main types of decorative material and the physical, mechanical and other properties they require. It then discusses types and potential uses of decorative stone materials such as marble, granite, slate or gypsum. It then goes on to discuss the ways cement and concrete can be used for decorative effect, before considering the role of ceramics in such areas as tiling. The following chapters review decorative glass for windows or facades, metals and wood before assessing polymer materials such as plastics and textiles. The final group of chapters discuss coatings, including waterproofing materials, multi-functional materials used for such purposes as soundproofing and thermal insulation, and the use of more sustainable decorative materials. Building decorative materials is a useful reference for architects, civil engineers and those studying civil or structural engineering. Reviews the full range of materials available for both the exterior and interior of buildings and their potential applications beyond conventional uses Considers the main types of decorative material and the physical, mechanical and other properties they require as the role of sustainable materials Discusses types and potential uses of decorative stone materials such as marble, granite, slate or gypsum and explores how cement and concrete can be used for decorative effect

Download or read book Acoustic And Non Acoustic Performance Coal Bottom Ash Concrete written by Shahiron Shahidan and published by Springer Nature. This book was released on 2020-09-08 with total page 79 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book highlights the acoustic performance of concrete made with Coal Bottom Ash (CBA) that has contributed to environmental issues. The usage of CBA in concrete can be recommended as good concrete due to its absorption properties. This book focuses on the principles and techniques employed in acoustic design. The book first elaborates on the perception of noise and properties of noise, followed by physical data, units and measurements. Finally, it takes a look at acoustic analysis which includes acoustic performance effects using different volumes of CBA, density and porosity of concrete.

Download or read book Basic of sound and hearing Part 4 building acoustics written by prof.Ibrahim elnoshokaty and published by ibrahim elnoshokaty. This book was released on 2020-11-19 with total page 276 pages. Available in PDF, EPUB and Kindle. Book excerpt: Building acoustics is the science of controlling noise in buildings. This includes the minimization of noise transmission from one space to another and the control of the characteristics of sound within spaces themselves. Building acoustics are an important consideration in the design, operation and construction of most buildings, and can have a significant impact on health and wellbeing, communication and productivity. They can be particularly significant in spaces such as concert halls, recording studios, lecture theatres, and so on, where the quality of sound and its intelligibility are very important. Building acoustics can be influenced by: The geometry and volume of a space. The sound absorption, transmission and reflection characteristics of surfaces enclosing the space and within the space. The sound absorption, transmission and reflection characteristics of materials separating spaces. The generation of sound inside or outside the space. Airborne sound transmission. Impact noise.

Download or read book Advances in Wood Composites II written by Antonios N. Papadopoulos and published by MDPI. This book was released on 2020-11-09 with total page 222 pages. Available in PDF, EPUB and Kindle. Book excerpt: Wood composites have shown very good performance and substantial service lives when correctly specified for the exposure risks present. The selection of an appropriate product for the job should be accompanied by decisions about the appropriate protection, whether this is by design, by preservative treatment, or by wood modification techniques. This Special Issue, “Advances in Wood Composites II”, presents recent progress in enhancing and refining the performance and properties of wood composites by chemical and thermal modification and the application of smart nanomaterials. Such enhancements and refinements have made wood composites a particular area of interest for researchers. In addition, this Special Issue reviews some important aspects in the field of wood composites, with particular focus on their materials, applications, and engineering and scientific advances, including solutions inspired biomimetically by the structure of wood and wood composites. This Special Issue, as a collection of 14 original contributions, provides selected examples of recent advances in wood composites.

Download or read book Dynamic Acoustic Parameters of Porous Media written by Andrea Cortis and published by Delft University Press. This book was released on 2002-01-01 with total page 137 pages. Available in PDF, EPUB and Kindle. Book excerpt: Upscaling techniques for porous media, from micro to marco, on the viscous length scale of wedge-shaped porous media, influence of pore roughness on high-frequency permeability, numerical validation of scaling functions for viscous and thermal relaxation in gas-filled porous media, viscous dynamic permeability.