Microstructure and Silicate Anion Structure of Hardened Blended Cement Pastes
Author: Catherine Anne Love
Publisher:
Published: 2002
Total Pages: 414
ISBN-13:
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Author: Catherine Anne Love
Publisher:
Published: 2002
Total Pages: 414
ISBN-13:
DOWNLOAD EBOOKAuthor: P. Barnes
Publisher: CRC Press
Published: 2002-11-01
Total Pages: 584
ISBN-13: 0203477782
DOWNLOAD EBOOKDrawing together a multinational team of authors, this second edition of Structure and Performance of Cements highlights the latest global advances in the field of cement technology. Three broad categories are covered: basic materials and methods, cement extenders, and techniques of examination. Within these categories consideration has been given to environmental issues such as the use of waste materials in cement-burning as supplementary fuels and new and improved methods of instrumentation for examining structural aspects and performance of cements. This book also covers cement production, mineralogy and hydration, as well as the mechanical properties of cement, and the corrosion and durability of cementitious systems. Special cements are included, along with calcium aluminate and blended cements together with a consideration of the role of gypsum in cements. Structure and Performance of Cements is an invaluable key reference for academics, researchers and practitioners alike.
Author: Robert Brady Williamson
Publisher:
Published: 1971
Total Pages: 15
ISBN-13:
DOWNLOAD EBOOKThe constitution and hydration of portland cement is reviewed and the microstructure of hardened cement paste is introduced with scanning electron micrographs. The development of strength of monoclinic tricalcium silicate (i.e., alite) pastes both with and without the addition of gypsum is presented using scanning micrographs of fresh fracture surfaces. This experimental data is used to illustrate the general principles in the relationship between microstructure and mechanical properties for portland cement pastes. (Author).
Author: Yuting Wang
Publisher:
Published: 1995
Total Pages: 0
ISBN-13:
DOWNLOAD EBOOKThe characterization of the microstructure of a material should include two aspects: the identification of the microstructural elements in the material, and the quantitative characterization of these microstructural elements. In this research. the microstructure of hardened cement paste (hcp) was studied using BEI on polished surfaces coupled with image analysis. The microstructural elements evaluated included (a) pores detectable at the magnifications used, (b) CH crystals, (c) residual unhydrated cement particles, (d) hydrated phenograins, consisting of both hydration shells and fully hydrated cement grains, (e) combined phenograins, i.e. (c) and (d) combined as they occur in individual features, and (f) the C-S-H in the groundmass. The quantitative analyses assayed include both area fraction measurement and geometrical measurement of individual features. The latter provides information on size., shape, size distribution and mutual arrangement of the these individual features. Various hcps were investigated to quantitatively elucidate the effects of w:c ratio, age, and the incorporation of superplasticizer and silica fume on hcp microstructure. It was found that quantitative image analysis of hcp can yield interesting. and sometimes unexpected insights into the microstructure of hcp. The incorporation of superplasticizer and the incorporation of both superplasticizer and silica fume showed very strong effects on the hcp microstructure. On the other hand silica fume alone did not show strong effects. In another portion of this research, the fractal dimension characteristic of the pore system of hcp was investigated using an image analysis technique. It was found that the detectable pore system in cement pastes shows two fractal regimes: a structural fractal dimension exhibited at low resolution (Ds = 1.08 ~ 1.15) and a textural fractal dimension exhibited at higher resolution (Dt = 1.22 ~ 1.49). Finally, using a stereoscopic SEM method, it was found that the fracture surface of cement pastes shows two distinct fractal regimes: a structural fractal regime at low magnifications descriptive of the gross structural irregularities, and a textural fractal at high magnifications descriptive of the textural details of the fracture surface. The structural fractal and the textural fractal seem to have universal values of 2.02 and 2.12 respectively.
Author: P. Barnes
Publisher: CRC Press
Published: 2002-11-01
Total Pages: 584
ISBN-13: 1482295016
DOWNLOAD EBOOKDrawing together a multinational team of authors, this second edition of Structure and Performance of Cements highlights the latest global advances in the field of cement technology. Three broad categories are covered: basic materials and methods, cement extenders, and techniques of examination. Within these categories consideration has been given
Author: Peter Hewlett
Publisher: Butterworth-Heinemann
Published: 2019-02-15
Total Pages: 896
ISBN-13: 0081007736
DOWNLOAD EBOOKLea's Chemistry of Cement and Concrete, Fifth Edition, examines the suitability and durability of different types of cements and concretes, their manufacturing techniques and the role that aggregates and additives play in achieving concrete's full potential of delivering a high-quality, long-lasting, competitive and sustainable product. Provides a 60% revision over the fourth edition last published in 2004 Includes updated chapters that represent the latest technological advances in the industry, including, but not exclusive to the production of low-energy cements, cement admixtures and concrete aggregates Presents expanded coverage of the suitability and durability of materials aggregates and additives
Author: I. G. Richardson
Publisher:
Published: 1991
Total Pages: 628
ISBN-13:
DOWNLOAD EBOOKAuthor: Herbert Pöllmann
Publisher: Walter de Gruyter GmbH & Co KG
Published: 2017-12-18
Total Pages: 518
ISBN-13: 3110473720
DOWNLOAD EBOOKAside from water the materials which are used by mankind in highest quantities arecementitious materials and concrete. This book shows how the quality of the technical product depends on mineral phases and their reactions during the hydration and strengthening process. Additives and admixtures infl uence the course of hydration and the properties. Options of reducing the CO2-production in cementitious materials are presented and numerous examples of unhydrous and hydrous phases and their formation conditions are discussed. This editorial work consists of four parts including cement composition and hydration, Special cement and binder mineral phases, Cementitious and binder materials, and Measurement and properties. Every part contains different contributions and covers a broad range within the area. Contents Part I: Cement composition and hydration Diffraction and crystallography applied to anhydrous cements Diffraction and crystallography applied to hydrating cements Synthesis of highly reactive pure cement phases Thermodynamic modelling of cement hydration: Portland cements – blended cements – calcium sulfoaluminate cements Part II: Special cement and binder mineral phases Role of hydrotalcite-type layered double hydroxides in delayed pozzolanic reactions and their bearing on mortar dating Setting control of CAC by substituted acetic acids and crystal structures of their calcium salts Crystallography and crystal chemistry of AFm phases related to cement chemistry Part III: Cementitious and binder materials Chemistry, design and application of hybrid alkali activated binders Binding materials based on calcium sulphates Magnesia building material (Sorel cement) – from basics to application New CO2-reduced cementitious systems Composition and properties of ternary binders Part IV: Measurement and properties Characterization of microstructural properties of Portland cements by analytical scanning electron microscopy Correlating XRD data with technological properties No cement production without refractories
Author: G. C. Bye
Publisher: Thomas Telford
Published: 1999
Total Pages: 256
ISBN-13: 9780727727664
DOWNLOAD EBOOKPortland cement is one of the most traditional of construction materials. Rising costs of the energy required for its manufacture and the increasing interest in understanding the mechanisms of concrete deterioration, as well as the importance of optimising the use of Portland cement in high quality concrete, have continued to sustain interest in this important material. This second edition of this popular book provides an up-to-date introduction to the raw materials and manufacturing processes of Portland cement. It gives an introductory account of cement composition, manufacture, quality assessment, hydration and the resulting microstructure-physical property relationships, and some mechanisms of the chemical degradation of hardened cement paste. The book is primarily intended for students of materials sciences and graduates in pure science or engineering entering the cement or concrete industries. However anyone requiring a good clear introduction to this material will find this book provides helpful information.
Author: D. M. Roy
Publisher: Strategic Highway Research Program (Shrp)
Published: 1993
Total Pages: 204
ISBN-13:
DOWNLOAD EBOOKDurability of concrete in highway systems is a problem of national concern. In order to better understand the mechanisms which intrinsically control durability in highway concrete, it is necessary to define and understand those factors which impact concrete microstructure which is a consequence of both its formulation and the processes taking place during mixing, placing and curing. This report documents an investigation of those variables which control cement hydration and consequent microstructural development.