Download or read book Studying the Microstructure and Modeling the Mechanical Properties of Early age Cement based Materials written by Giri Venkiteela and published by . This book was released on 2010 with total page 266 pages. Available in PDF, EPUB and Kindle. Book excerpt: It is very important to have a solid knowledge on setting and mechanical properties behaviors of early-age concretes. To enhance the current understanding of these behaviors in cement-based materials, microstructure and two different mechanical properties developments were studied in this dissertation for various mixtures. To establish a better understanding of the physical behaviors of cement particles during setting, in-situ observations were made on microstructure developments of various fresh cement pastes using an advance Scanning Electron Microscopy (SEM) technique called the Quantomix WETSEM(TM) capsuling system. Using the image analysis techniques on the captured images, microstructure changes of these cement pastes were then quantitatively investigated. During the study, single and multiple cement particle growth, hydration rate of different sized cement particles, water and solid volume fraction changes were studied quantitatively. The correlations of Vicat needle settlements, heat of hydration, and dynamic shear modulus development within the cement pastes with-respect-to total solids growth were also studied. Further, a comprehensive model for dynamic Young's modulus (E d ) of early-age normal concrete was proposed based on its original mix-design. Based on the experimental work and the Artificial Neural Network (ANN) technique, various cement paste, mortar and concrete mixture elastic moduli were modeled on a single platform. The role of hydration age, water-to-cement (w/c) ratio, curing temperature, aggregate volume percentages, aggregate absorption capacities and aggregate sizes on the development of elastic moduli were considered. Using the generalization capabilities of ANN, effective mix-design parameters affecting the concrete elastic modulus evolution at early ages were identified. It was thus possible to quantify the significant effects of age, w/c ratio, coarse aggregate volume percentage, and curing temperature on the evolution of the concrete elastic modulus. Finally, the compressive strength (f c ) of normal concrete at early ages was modeled as a function of the dynamic shear modulus (G d ). The effects of various parameters such as hydration age, water-to-cement (w/c) ratio, curing temperature, aggregate content and maximum aggregate size were examined on the G d -f c relationship of composite mixtures. Based on the key factors that were identified, G d -f c relationship was then mathematically modeled. Being in simple expression form and having the accuracy in prediction of f c values for concrete composites, the developed model can be directly used in field.
Download or read book Mechanical Properties of Cementitious Materials at Microscale written by Ya Wei and published by Springer Nature. This book was released on 2022-11-14 with total page 477 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides information on characterizing the microstructure and mechanical properties of cementitious materials at microscale. Specifically, with the intention to provide the methods of preparing the samples for the micro-scale mechanical testing, to address the techniques for measuring and analyzing the elastic modulus, the stiffness, and the fracture toughness of cementitious materials at micro scale by instrumented indentation, to describe a method for measuring and interpreting creep behavior of cementitious materials at micro scale, and to demonstrate the homogenization method for obtaining the mechanical properties of cementitious materials across scales. The information in this book is helpful to a wide readership in the field of civil engineering and materials science working with cementitious materials and other composite materials.
Download or read book Cement Based Composites written by Andrzej M. Brandt and published by CRC Press. This book was released on 2009-01-29 with total page 536 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cement-Based Composites takes a different approach from most other books in the field by viewing concrete as an advanced composite material, and by considering the properties and behaviour of cement-based materials from this stance. It deals particularly, but not exclusively, with newer forms of cement-based materials. This new edition takes a critical approach to the subject as well as presenting up-to-date knowledge. Emphasis is given to non-conventional reinforcement and design methods, problems at the materials' interfaces and to the durability of structures. High strength composites and novel forms of cement-based composites are described in detail. After a basic introduction the book explores the various components of these materials and their properties. It then deals with mechanical properties and considers characteristics under various loading and environmental conditions, and concludes by examining design, optimization and economics with particular emphasis on high-performance concretes. Researchers, graduate students and practising engineers will find this book valuable.
Download or read book Cement Based Materials written by Hosam El-Din M. Saleh and published by BoD – Books on Demand. This book was released on 2018-10-10 with total page 276 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cement-based materials have been used by humans nearly since the dawn of civilization. The Egyptians used lime and gypsum cement to bind their aggregate materials, mud and straw, resulting in bricks that are used for building their famous Egyptian pyramids (between 3000 and 2500 BC). Hydrated cement is a cement material bonded together with water and used for building construction; it is characterized by acceptable chemical, physical, thermal, mechanical, and structural stability. It plays a main role in the creation of vessels for storage, roads to travel on, weather-resistant structure for protection, inert hard stabilizer for hazardous wastes, and so on. Due to the composition of these materials and their advantages, it has been practiced in different applications. Cement is an essential component of making concrete, the single most prevalent building material used worldwide for construction, skyscrapers, highways, tunnels, bridges, hydraulic dams, and railway ties. Besides their numerous desired properties, there are some undesirable features. To overcome these disadvantages, several studies were established to prepare, improve, and evaluate innovative cement-based materials. Despite its oldness and deep research, every year several methods and materials evolve and so do cement technology. This book intends to provide a comprehensive overview on recent advances in the evaluation of these materials.
Download or read book Study on Microstructure and Rheological Properties of Cement Chemical Admixtures Water Dispersion System at Early Stage written by Yanrong Zhang and published by Springer. This book was released on 2017-07-25 with total page 271 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis studies the effects of superplasticizers, polyacrylate latexes and asphalt emulsions, which differ in molecular/particle size from nanometers to microns, on the rheological properties of fresh cement pastes (FCPs), as well as the action mechanisms involved. It systematically investigates the rheological properties and microstructure of cement-based materials, and elucidates the adsorption behaviors of polycarboxylate polymers with different functional groups and their effects on cement hydration. Moreover, it reveals how the working mechanism of naphthalene sulfonate formaldehyde (NSF) differs from that of polycarboxylate ether-based (PCE) superplasticizers. Lastly, it develops a conceptual microstructure model and two rheological equations. These findings lend theoretical support to the development of new chemical admixtures and new, higher-performance, cement-based composites.
Download or read book Transition from Fluid to Solid written by and published by American Concrete Institute. This book was released on 2009 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt: Summary: This publication contains the twelve papers presented at a full-day technical session sponsored by the American Concrete Insitute. The subject matter of these papers includes: (1) the development of concrete properties and microstructure at early ages, (2) test methods for assessing early-age volume change and cracking potential, (3) construction operations timing, (4) computer simulations of early-age behavior, and (5) mechanisms that end the concrete dormant period.
Download or read book Concrete Microstructure Properties and Materials written by P. Mehta and published by McGraw Hill Professional. This book was released on 2005-09-26 with total page 684 pages. Available in PDF, EPUB and Kindle. Book excerpt: This textbook presents the art and science of concrete in a simple, clear, hands-on manner, focusing on the following: Cement and concrete are predicted to be the premier building material of the 21st Century; Includes unique diagrams, photographs, and summary tables; Updated to include new chapters on non-destructive methods for concrete; future challenges in concrete technology; an increased number of examples of concrete applications; and new developments in durability.
Download or read book Computational Modelling of Concrete Structures written by Günther Meschke and published by CRC Press. This book was released on 2018-01-31 with total page 1034 pages. Available in PDF, EPUB and Kindle. Book excerpt: The EURO-C conference series (Split 1984, Zell am See 1990, Innsbruck 1994, Badgastein 1998, St. Johann im Pongau 2003, Mayrhofen 2006, Schladming 2010, St. Anton am Arlberg 2014, and Bad Hofgastein 2018) brings together researchers and practising engineers concerned with theoretical, algorithmic and validation aspects associated with computational simulations of concrete and concrete structures. Computational Modelling of Concrete Structures reviews and discusses research advancements and the applicability and robustness of methods and models for reliable analysis of complex concrete, reinforced concrete and pre-stressed concrete structures in engineering practice. The contributions cover both computational mechanics and computational modelling aspects of the analysis and design of concrete and concrete structures: Multi-scale cement and concrete research: experiments and modelling Aging concrete: from very early ages to decades-long durability Advances in material modelling of plain concrete Analysis of reinforced concrete structures Steel-concrete interaction, fibre-reinforced concrete, and masonry Dynamic behaviour: from seismic retrofit to impact simulation Computational Modelling of Concrete Structures is of special interest to academics and researchers in computational concrete mechanics, as well as industry experts in complex nonlinear simulations of concrete structures.
Download or read book Digital Fabrication with Cement Based Materials written by Nicolas Roussel and published by Springer Nature. This book was released on 2022-01-12 with total page 242 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents the work of the RILEM Technical Committee 276-DFC: Digital fabrication with cement-based materials. The most important outcomes of the technical committee are presented. First, a unified process classification for digital fabrication with concrete is proposed, discussed and illustrated. Then, a state of the art of the testing methods (both at a material and structural level and in the fresh and hardened state) is provided. The gathered knowledge is expected to form the foundation of some quality control procedures for fresh properties along with hardened properties and service life performance. The book will benefit academics, practitioners, industry and standardization committees interested in digital fabrication with cement-based materials.
Download or read book Measuring Monitoring and Modeling Concrete Properties written by Maria S. Konsta-Gdoutos and published by Springer Science & Business Media. This book was released on 2007-09-23 with total page 761 pages. Available in PDF, EPUB and Kindle. Book excerpt: This state-of-the-art volume covers the latest and future trends in measuring, monitoring and modeling the properties of cement based materials. The book contains 94 papers and presents the latest research work of renowned experts. It acts as a survey of the most up-to-date research in the field.
Download or read book Acoustics of Porous Media written by Thierry Bourbié and published by Editions TECHNIP. This book was released on 1987 with total page 366 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Waste and Byproducts in Cement Based Materials written by Jorge de Brito and published by Woodhead Publishing. This book was released on 2021-06-03 with total page 810 pages. Available in PDF, EPUB and Kindle. Book excerpt: Waste and By-Products in Cement-Based Materials: Innovative Sustainable Materials for a Circular Economy covers various recycled materials, by-products and wastes that are suitable for the manufacture of materials within the spectrum of so-called cement-based materials (CBM). Sections cover wastes for replacement of aggregates in CBM, focus on the application of wastes for the replacement of clinker and mineral additions in the manufacture of binders, discuss the optimization process surrounding the manufacture of recycled concrete and mortars, multi-recycling, advanced radiological studies, optimization of self-compacting concrete, rheology properties, corrosion prevention, and more. Final sections includes a review of real-scale applications that have been made in recent years of cement-based materials in roads, railway superstructures, buildings and civil works, among others, as well as a proposal of new regulations to promote the use of waste in the manufacture of CBM. Favors the institution of the circular economy in the construction industry by eliminating the barriers that currently prevent industrial waste from being valorized by its inclusion in CBM design Features an in-depth exploration of the strengths and weaknesses of new raw materials and their application to CBMs Features real-scale applications that have been made in recent years of cement-based materials in roads, railway superstructures, buildings and civil works, among others Presents current, state-of-the-art, and future-prospects for the use of industrial waste in CBMs
Download or read book Computational Modelling of Concrete Structures written by Gunther Meschke and published by CRC Press. This book was released on 2020-11-26 with total page 949 pages. Available in PDF, EPUB and Kindle. Book excerpt: This conference proceedings brings together the work of researchers and practising engineers concerned with computational modelling of complex concrete, reinforced concrete and prestressed concrete structures in engineering practice. The subjects considered include computational mechanics of concrete and other cementitious materials, including masonry. Advanced discretisation methods and microstructural aspects within multi-field and multi-scale settings are discussed, as well as modelling formulations and constitutive modelling frameworks and novel experimental programmes. The conference also considered the need for reliable, high-quality analysis and design of concrete structures in regard to safety-critical structures, with a view to adopting these in codes of practice or recommendations. The book is of special interest to researchers in computational mechanics, and industry experts in complex nonlinear simulations of concrete structures.
Download or read book Proceedings of the 8th International Conference on Civil Engineering written by Guangliang Feng and published by Springer Nature. This book was released on 2022-04-12 with total page 564 pages. Available in PDF, EPUB and Kindle. Book excerpt: This open access book is a collection of accepted papers from the 8th International Conference on Civil Engineering (ICCE2021). Researchers and engineers have discussed and presented around three major topics, i.e., construction and structural mechanics, building materials, and transportation and traffic. The content provide new ideas and practical experiences for both scientists and professionals.
Download or read book The Microstructure and Mechanical Properties of a Portland Cement ls Ag System written by Angel José Mancera-Marquéz and published by . This book was released on 1968 with total page 49 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Practical Guide to Microstructural Analysis of Cementitious Materials written by Karen Scrivener and published by CRC Press. This book was released on 2018-10-09 with total page 540 pages. Available in PDF, EPUB and Kindle. Book excerpt: A Practical Guide from Top-Level Industry Scientists As advanced teaching and training in the development of cementitious materials increase, the need has emerged for an up-to-date practical guide to the field suitable for graduate students and junior and general practitioners. Get the Best Use of Different Techniques and Interpretations of the Results This edited volume provides the cement science community with a state-of-the-art overview of analytical techniques used in cement chemistry to study the hydration and microstructure of cements. Each chapter focuses on a specific technique, not only describing the basic principles behind the technique, but also providing essential, practical details on its application to the study of cement hydration. Each chapter sets out present best practice, and draws attention to the limitations and potential experimental pitfalls of the technique. Databases that supply examples and that support the analysis and interpretation of the experimental results strengthen a very valuable ready reference. Utilizing the day-to-day experience of practical experts in the field, this book: Covers sample preparation issues Discusses commonly used techniques for identifying and quantifying the phases making up cementitious materials (X-ray diffraction and thermogravimetric analysis) Presents good practice oncalorimetry and chemical shrinkage methods for studying cement hydration kinetics Examines two different applications of nuclear magnetic resonance (solid state NMR and proton relaxometry) Takes a look at electron microscopy, the preeminent microstructural characterization technique for cementitious materials Explains how to use and interpret mercury intrusion porosimetry Details techniques for powder characterization of cementitious materials Outlines the practical application of phase diagrams for hydrated cements Avoid common pitfalls by using A Practical Guide to Microstructural Analysis of Cementitious Materials. A one-of-a-kind reference providing the do’s and don’ts of cement chemistry, the book presents the latest research and development of characterisation techniques for cementitious materials, and serves as an invaluable resource for practicing professionals specializing in cement and concrete materials and other areas of cement and concrete technology.
Download or read book Multi Scale Modeling of Structural Concrete written by Koichi Maekawa and published by CRC Press. This book was released on 2008-11-28 with total page 670 pages. Available in PDF, EPUB and Kindle. Book excerpt: Increases in computer power have now enabled engineers to combine materials science with structural mechanics in the design and the assessment of concrete structures. The techniques developed have become especially useful for the performance assessment of such structures under coupled mechanistic and environmental actions. This allows effective management of infrastructure over a much longer life cycle, thus satisfying the requirements for durability and sustainability. This ground-breaking new book draws on the fields of materials and structural mechanics in an integrated way to address the questions of management and maintenance. It proposes a realistic way of simulating both constituent materials and structural responses under external loading and under ambient conditions. Where the research literature discusses component or element technology related to performance assessment, this book uniquely covers the subject at the level of the whole system including soil foundation, showing engineers how to model changes in concrete structures over time and how to use this for decision making in infrastructure maintenance and asset management.
