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Geopolymers

Geopolymers Book
Author : J L Provis,J S J van Deventer
Publisher : Elsevier
Release : 2009-06-22
ISBN : 1845696387
Language : En, Es, Fr & De

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Book Description :

A geopolymer is a solid aluminosilicate material usually formed by alkali hydroxide or alkali silicate activation of a solid precursor such as coal fly ash, calcined clay and/or metallurgical slag. Today the primary application of geopolymer technology is in the development of reduced-CO2 construction materials as an alternative to Portland-based cements. Geopolymers: structure, processing, properties and industrial applications reviews the latest research on and applications of these highly important materials. Part one discusses the synthesis and characterisation of geopolymers with chapters on topics such as fly ash chemistry and inorganic polymer cements, geopolymer precursor design, nanostructure/microstructure of metakaolin and fly ash geopolymers, and geopolymer synthesis kinetics. Part two reviews the manufacture and properties of geopolymers including accelerated ageing of geopolymers, chemical durability, engineering properties of geopolymer concrete, producing fire and heat-resistant geopolymers, utilisation of mining wastes and thermal properties of geopolymers. Part three covers applications of geopolymers with coverage of topics such as commercialisation of geopolymers for construction, as well as applications in waste management. With its distinguished editors and international team of contributors, Geopolymers: structure, processing, properties and industrial applications is a standard reference for scientists and engineers in industry and the academic sector, including practitioners in the cement and concrete industry as well as those involved in waste reduction and disposal. Discusses the synthesis and characterisation of geopolymers with chapters covering fly ash chemistry and inorganic polymer cements Assesses the application and commercialisation of geopolymers with particular focus on applications in waste management Reviews the latest research on and applications of these highly important materials

Fire Resistant Geopolymers

Fire Resistant Geopolymers Book
Author : Les Vickers,Arie van Riessen,William D. A. Rickard
Publisher : Springer
Release : 2014-12-05
ISBN : 9812873112
Language : En, Es, Fr & De

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Book Description :

The book covers the topic of geopolymers, in particular it highlights the relationship between structural differences as a result of variations during the geopolymer synthesis and its physical and chemical properties. In particular, the book describes the optimization of the thermal properties of geopolymers by adding micro-structural modifiers such as fibres and/or fillers into the geopolymer matrix. The range of fibres and fillers used in geopolymers, their impact on the microstructure and thermal properties is described in great detail. The book content will appeal to researchers, scientists, or engineers who are interested in geopolymer science and technology and its industrial applications.

Geopolymer Chemistry and Applications

Geopolymer Chemistry and Applications Book
Author : Joseph Davidovits
Publisher : Geopolymer Institute
Release : 2008
ISBN : 2951482019
Language : En, Es, Fr & De

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Book Description :

What can be done about the major concerns of our Global Economy on energy, global warming, sustainable development, user-friendly processes, and green chemistry? Here is an important contribution to the mastering of these phenomena today. Written by Joseph Davidovits, the inventor and founder of geopolymer science, it is an introduction to the subject for the newcomers, students, engineers and professionals. You will find science, chemistry, formulas and very practical information (including patents' excerpts) covering: - The mineral polymer concept: silicones and geopolymers, - Macromolecular structure of natural silicates and aluminosilicates, - Scientific Tools, X-rays, FTIR, NMR, - The synthesis of mineral geopolymers, Poly(siloxonate) and polysilicate, soluble silicate, Chemistry of (Na, K)oligo-sialates: hydrous alumino-silicate gels and zeolites, Kaolinite / Hydrosodalite-based geopolymer, Metakaolin MK-750-based geopolymer, Calcium-based geopolymer, Rock-based geopolymer, Silica-based geopolymer, Fly ash-based geopolymer, Phosphate-based geopolymer, Organic-mineral geopolymer, - Properties: physical, chemical and long-term durability, - Applications: Quality controls, Development of user-friendly systems, Castable geopolymer, industrial and decorative applications, Geopolymer / fiber composites, Foamed geopolymer, Geopolymers in ceramic processing, Manufacture of geopolymer cement, Geopolymer concrete, Geopolymers in toxic and radioactive waste management. It is a textbook, a reference book instead of being a collection of scientific papers. Each chapter is followed by a bibliography of the relevant published literature including 75 patents, 120 tables, 360 figures, 550references, 700 authors cited, representing the most up to date contributions of the scientific community. The industrial applications of geopolymers with engineering procedures and design of processes are also covered in this book.

Geopolymer and Geopolymer Matrix Composites

Geopolymer and Geopolymer Matrix Composites Book
Author : Dechang Jia,Peigang He,Meirong Wang,Shu Yan
Publisher : Springer
Release : 2020-12-03
ISBN : 9789811595356
Language : En, Es, Fr & De

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Book Description :

This book investigates geopolymers and geopolymer-based composites, with a focus on their preparation, geopolymerization mechanisms, microstructures, mechanical properties, and fracture behaviors. Geopolymers are inorganic materials consisting of tetrahedral units (such as [SiO4] and [AlO4]) linked by shared oxygens and forming long-range, covalently bonded and amorphous frameworks. Geopolymers have the advantages of low-temperature preparation, low cost, high heat and corrosion resistance, and being environmentally friendly. Using the preparation methods for epoxy-based composite, they can easily be formed into complex shapes or structures. Intended for researchers investigating geopolymers and their matrix composite materials, this book is also a valuable resource for engineers from various fields, such as materials, mechanical, civil and structural engineering, as well as students interested in other kinds of inorganic materials or even cementitious materials in general.

Geopolymers and Other Geosynthetics

Geopolymers and Other Geosynthetics Book
Author : Mazen Alshaaer,Han-Yong Jeon
Publisher : BoD – Books on Demand
Release : 2020-02-26
ISBN : 1789851769
Language : En, Es, Fr & De

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Book Description :

Geopolymers are applied to material classes that are chemically transformed from low crystallinity aluminusilicates to three-dimensional inorganic polymers (tectosilicates). The resulting material has properties similar to natural minerals, so it is called artificial rock. However, these materials exhibit a chemical composition and mineralogical structure similar to feldspar, feldspathoidal, and zeolites consisting of a polymeric Si–O– Al framework, with a microcrystalline or an amorphous structure. Although geopolymers have attractive engineering and environmental characteristics, there are some challenges in commercializing these materials. In this book, these challenges will be addressed along with introducing the functional geopolymers as an effective approach to commercializing these materials and making them economically feasible.

Geopolymer Green Chemistry and Sustainable Development Solutions

Geopolymer  Green Chemistry and Sustainable Development Solutions Book
Author : Joseph Davidovits
Publisher : Geopolymer Institute
Release : 2005
ISBN : 2951482000
Language : En, Es, Fr & De

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Book Description :

Download Geopolymer Green Chemistry and Sustainable Development Solutions book written by Joseph Davidovits, available in PDF, EPUB, and Kindle, or read full book online anywhere and anytime. Compatible with any devices.

Geopolymers

Geopolymers Book
Author : Vikas Mittal
Publisher : Unknown
Release : 2019-01-31
ISBN : 9781925823233
Language : En, Es, Fr & De

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Book Description :

Geopolymers are a new class of binder materials and are generally classified as pure inorganic geopolymers and organic containing geopolymers. Geopolymers are multi-functional materials with applications in a large variety of scientific and industrial disciplines. Significant advancements have been made in the recent years regarding tuning of structures to meet the required set of properties so as to achieve specific applications. In this respect, the book aims to summarize synthesis, properties and applications of various advanced geopolymer systems. The wealth of information about synthesis and commercialization of many commercially relevant geopolymers makes the book a valuable asset for a diverse audience ranging from materials, chemical and process engineers as well as practicing scientists in academia and industry to postgraduate university students in various engineering disciplines. For more details, please visit https: //centralwestpublishing.com

Geopolymers

Geopolymers Book
Author : John L. Provis,Jan Stephanus Jakob Van Deventer
Publisher : Unknown
Release : 2009
ISBN : 9781613447956
Language : En, Es, Fr & De

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Book Description :

Annotation A geopolymer is a solid aluminosilicate material usually formed by alkali hydroxide or alkali silicate activation of a solid precursor such as coal fly ash, calcined clay and/or metallurgical slag. Today the primary application of geopolymer technology is in the development of reduced-CO2 construction materials as an alternative to Portland-based cements. Geopolymers: structure, processing, properties and industrial applications reviews the latest research on and applications of these highly important materials. Part one discusses the synthesis and characterisation of geopolymers with chapters on topics such as fly ash chemistry and inorganic polymer cements, geopolymer precursor design, nanostructure/microstructure of metakaolin and fly ash geopolymers, and geopolymer synthesis kinetics. Part two reviews the manufacture and properties of geopolymers including accelerated ageing of geopolymers, chemical durability, engineering properties of geopolymer concrete, producing fire and heat-resistant geopolymers, utilisation of mining wastes and thermal properties of geopolymers. Part three covers applications of geopolymers with coverage of topics such as commercialisation of geopolymers for construction, as well as applications in waste management. With its distinguished editors and international team of contributors, Geopolymers: structure, processing, properties and industrial applications is a standard reference for scientists and engineers in industry and the academic sector, including practitioners in the cement and concrete industry as well as those involved in waste reduction and disposal.

Properties and Application of Geopolymers

Properties and Application of Geopolymers Book
Author : Januarti Jaya Ekaputri,Antoni,
Publisher : Trans Tech Publications Ltd
Release : 2016-01-25
ISBN : 303570015X
Language : En, Es, Fr & De

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Book Description :

The objective of this book is the lighting of latest achievements in the field of development and application of geopolymers in various industries in aspect of using green materials for sustainable development.

Mud to cement Conversion of Synthetic based Drilling Muds Using Geopolymers

Mud to cement Conversion of Synthetic based Drilling Muds Using Geopolymers Book
Author : Xiangyu Liu
Publisher : Unknown
Release : 2017
ISBN : 0987650XXX
Language : En, Es, Fr & De

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Book Description :

When constructing wells ranging from simple land wells to complex deepwater wells, incompatibility between oil-based and synthetic-based muds (OBM / SBM) and Portland cements can lead to poor cementation and loss of cement integrity, which in turn may compromise zonal isolation. An alternative cementitious material based on geopolymers has been developed with improved OBM / SBM compatibility for primary cementing and lost circulation control as well as well abandonment. Benefits of using geopolymers go beyond mere OBM / SBM compatibility: it is in fact possible to solidify non-aqueous drilling fluids (NAF) such as SBM and OBM using geopolymer formulations. This also means that such NAFs can be disposed of in a more cost-effective way, which presents a viable option for environmentally acceptable on-site or off-site disposal of drilling muds and cuttings. In the following, focus will be primarily on the compatibility between SBM and geopolymers, with the understanding that the results obtained for SBM can generally be extrapolated to OBM as well. Geopolymer is a type of alkali-activated material that forms when an aluminosilicate precursor powder (such as fly ash) is mixed with an alkaline-activating solution (such as sodium hydroxide). A novel SBM solidification method was developed by blending varied amounts of geopolymer and SBM. The consolidated mud was named a “geopolymer hybrid cement”. In an effort to develop the geopolymer hybrid system as a novel well cementing material, the solidification method was comprehensively studied with various sources of precursor powders, activators, as well as SBM and OBM formulations. Fresh state properties, such as slurry rheology and thickening time, and hardened state mechanical properties, such as compressive strength (under both uniaxial and triaxial confinement conditions), as well as the self-healing capabilities of the geopolymer hybrid cement were evaluated. Strength testing results showed that geopolymer cement can solidify up to a 60/40 geopolymer/SBM ratio by volume. The incorporation of SBM greatly improved the rheological properties of the geopolymer hybrid, allowing for the otherwise non-pumpable slurry to become pumpable for well cementation and lost circulation control purposes. The laboratory evaluations showed that the geopolymer hybrid cement could meet typical requirements as a well cementing slurry. By changing the amount of geopolymer and SBM in the slurry, the geopolymer hybrid can be deliberately designed with high compressive strength for primary cementation, or with lower compressive strength for lost circulation control. Moreover, geopolymer and geopolymer hybrid cements reveal true self-healing capability, which means that they can recover and even increase their strength after prior yielding. This ability would possibly allow such cements to better adapt to subsurface stress changes acting on abandoned wells, making them better suited for use in permanent barriers in plug and abandonment operations.

Geopolymer and Geopolymer Matrix Composites

Geopolymer and Geopolymer Matrix Composites Book
Author : Dechang Jia,Peigang He,Meirong Wang,Shu Yan
Publisher : Springer Nature
Release : 2020-12-02
ISBN : 9811595364
Language : En, Es, Fr & De

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Book Description :

This book investigates geopolymers and geopolymer-based composites, with a focus on their preparation, geopolymerization mechanisms, microstructures, mechanical properties, and fracture behaviors. Geopolymers are inorganic materials consisting of tetrahedral units (such as [SiO4] and [AlO4]) linked by shared oxygens and forming long-range, covalently bonded and amorphous frameworks. Geopolymers have the advantages of low-temperature preparation, low cost, high heat and corrosion resistance, and being environmentally friendly. Using the preparation methods for epoxy-based composite, they can easily be formed into complex shapes or structures. Intended for researchers investigating geopolymers and their matrix composite materials, this book is also a valuable resource for engineers from various fields, such as materials, mechanical, civil and structural engineering, as well as students interested in other kinds of inorganic materials or even cementitious materials in general.

Advances in Ceramic matrix Composites

Advances in Ceramic matrix Composites Book
Author : Anonim
Publisher : Unknown
Release : 2005
ISBN : 0987650XXX
Language : En, Es, Fr & De

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Book Description :

Download Advances in Ceramic matrix Composites book written by , available in PDF, EPUB, and Kindle, or read full book online anywhere and anytime. Compatible with any devices.

Clay Based Geopolymers

Clay Based Geopolymers Book
Author : Mohd Mustafa Al Bakri Abdullah,Heah Cheng Yong,Liew Yun Ming
Publisher : LAP Lambert Academic Publishing
Release : 2012
ISBN : 9783847343097
Language : En, Es, Fr & De

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Book Description :

CLAY BASED GEOPOLYMERS: Processing & Characterization provides information on the geopolymers process and the mechanism reaction involved. This book also includes a newly invented processing of geopolymeric powder. The resulted presented in this book were part of the experimental works at Center of Excellence Geopolymer System Research ([email protected]).The text has thouroughly reviewed the historical background of alkali-activated binders, introduced kaolin as a prime material, described the reaction mechanism of kaolinite, and identified factors that affect the formation of this geopolymer. It covers the experimental data on the effect of various important factors (e.g. alkali concentration, clay-to-activator ratio, activator ratio, solidification process, curing conditions and etc.) on the processing and synthesis of the geopolymer cements and geopoymeric powder. Nevertheless, the characterization of the mechanical properties of the geopolymer cements and the geopolymeric powder were elucidated. It is hoped that future research in this field will drive a new era of greener materials in the construction industry.

Strength and Durability of Fly Ash Geopolymers

Strength and Durability of Fly Ash Geopolymers Book
Author : Suresh Thokchom,Somnath Ghosh,Partha Ghosh
Publisher : LAP Lambert Academic Publishing
Release : 2012-02
ISBN : 9783846587850
Language : En, Es, Fr & De

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Book Description :

Geopolymers are new binding material made from mostly waste material by activating with an alkaline solution. This material has high early strength, excellent durability in acids and sulphates and also reported to be highly resistant to elevated temperatures. It is considered to be an alternative to portland cement binders. Geopolymer has, of late attracted a lot of attention from civil engineers and material scientists as well. With further research, this material can be expected to revolutionize the construction industry in the near future. This book is an outcome of an extensive experimental study on strength and durability of fly ash based geopolymer composites. Geopolymer pastes and mortars made with varying alkali and silica contents are exposed to different acids of varying concentrations.They are found to be highly resistant to acids on the basis of weight and strength changes, microstructural and mineralogical changes.

Synthesis and Characterization of Geopolymers Using Locally Available Fly Ashes

Synthesis and Characterization of Geopolymers Using Locally Available Fly Ashes Book
Author : Shixin Zeng
Publisher : Unknown
Release : 2014
ISBN : 0987650XXX
Language : En, Es, Fr & De

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Book Description :

Geopolymer can be synthesized using industrial wastes such as fly ash, making it a promising material to replace Ordinary Portland Cement (OPC) as a green binder for concretes. In this study, four locally available fly ashes were used to synthesize geopolymers. These fly ashes were carefully selected to include both the high calcium and low calcium fly ashes. Two of the fly ashes have very similar chemical compositions. Comprehensive experimental programs have been carried out to characterize these fly ashes, to examine the critical factors affecting the mechanical properties of geopolymers, and to evaluate the potentials of these fly ashes as source materials for geopolymers. Testing results show all these fly ashes can be used to synthesize geopolymer. Among them, the fly ash from Gaston was found to be the most suitable source material for geopolymer. Fracture behavior of the produced geopolymer mortar was studied using splitting wedge testing together with digital image correlation technique. The measured full-field displacement clearly shows that a fracture process zone (FPZ) exists ahead of the major crack, suggesting that the fracture of the geopolymer mortar follows a nonlinear behavior. The bi-linear constitutive law of the FPZ was then obtained three an inverse analysis. To gain insight into the geopolymerization process, the electrical properties of the produced geopolymers were measured. It has been found that both the magnitude of the electric impedance or the electric resistance can be used as an indicator of the degree of geopolymerization. The bulk resistance of all geopolymers increases with age over one year, suggesting that the polymerization is a very long process. Finally, to explore the possibility to reinforce the brittle matrix such as geopolymer with Carbon Nanotubes, a model of shear force transfer from CNTs to the matrix is developed to understand and optimize the reinforcing effect of CNTs.

Fire Resistant Geopolymers

Fire Resistant Geopolymers Book
Author : Les Vickers,Arie Van Riessen,William D. A. Rickard
Publisher : Unknown
Release : 2014-12-31
ISBN : 9789812873125
Language : En, Es, Fr & De

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Book Description :

Download Fire Resistant Geopolymers book written by Les Vickers,Arie Van Riessen,William D. A. Rickard, available in PDF, EPUB, and Kindle, or read full book online anywhere and anytime. Compatible with any devices.

Advanced Processing of Metals and Materials Sohn International Symposium Thermo and Physicochemical Principles

Advanced Processing of Metals and Materials  Sohn International Symposium   Thermo and Physicochemical Principles Book
Author : Florian Kongoli,Ramana G. Reddy
Publisher : Wiley-TMS
Release : 2006-09-01
ISBN : 9780873396363
Language : En, Es, Fr & De

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Book Description :

The final of a three-volume series on thermo- and physicochemical principles at the Sohn International Symposium, these proceedings include papers on leaching and flotation, aqueous and electrochemical processing, as well as special materials. From the 2006 TMS Fall Extraction & Processing: Sohn International Symposium, held August 27 - 31, 2006, in San Diego, California.

Fly Ash based Geopolymers

Fly Ash based Geopolymers Book
Author : Katherine Louise Aughenbaugh
Publisher : Unknown
Release : 2013
ISBN : 0987650XXX
Language : En, Es, Fr & De

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Book Description :

Geopolymer cements present a unique opportunity to make concrete binders almost entirely out of waste stream materials. Geopolymers made from fly ash, a waste product of coal power generation, as the aluminosilicate source and caustic activating solution were the focus of this study. However, the use of waste stream materials presents many challenges. One major stumbling block is that fly ash is inherently variable in composition and difficult to comprehensively characterize. The purpose of this work was to clarify the relationship between fly ash composition and reactivity in geopolymer cements. Ten fly ashes comprising a wide compositional spectrum were selected for the study and were characterized using quantitative x-ray diffraction and multispectral image analysis (MSIA) of x-ray maps coupled with point compositional analysis. The fly ashes were mixed into geopolymer mortars to determine their reactivity when activated as geopolymers. I hypothesized that the fly ashes that performed well under geopolymer formation conditions would have similarities in the glassy phases identified in them. The fly ashes that resulted in geopolymers with high compressive strengths did have several glassy phases in common. The phases were typically high in calcium, high in silicon, and somewhat low in aluminum. To determine whether the common phases were soluble and therefore likely to be dissolved, a dissolution method was used in which fly ash was mixed with concentrated caustic solution and continuously agitated; after 7 d and 28 d, the solid residues from the dissolution were studied using MSIA. The results showed that most of the glassy phases hypothesized to react were reactive, although the results were somewhat complex due to the heterogeneity of fly ash. The MSIA method proposed in previous work was further developed through this study, and a new way of selecting the training classes for phase composition assignment in the images was proposed.