Quantifying the pore structure of cement-based materials using backscattered electron microscopy
Author: Hong Seong Wong
Publisher:
Published: 2006
Total Pages:
ISBN-13:
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Author: Hong Seong Wong
Publisher:
Published: 2006
Total Pages:
ISBN-13:
DOWNLOAD EBOOKAuthor: Maria S. Konsta-Gdoutos
Publisher: Springer Science & Business Media
Published: 2007-09-23
Total Pages: 761
ISBN-13: 1402051042
DOWNLOAD EBOOKThis 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.
Author: Kalliopi K. Aligizaki
Publisher: CRC Press
Published: 2005-09-22
Total Pages: 442
ISBN-13: 9780419228004
DOWNLOAD EBOOKPore Structure of Cement-Based Materials provides a thorough treatment of the experimental techniques used to characterize the pore structure of materials. The text presents the principles and practical applications of the techniques used, organized in an easy-to-follow and uncomplicated manner, providing the theoretical background, the way to analyze experimental data, and the factors affecting the results. The book is the single comprehensive source of the techniques most commonly used for pore structure analysis, covering simple techniques like mercury intrusion porosimetry and water absorption, to the more sophisticated small-angle scattering and nuclear magnetic resonance. The book is an essential reference text for researchers, users, and students in materials science, applied physics, and civil engineering, who seek a deep understanding of the principles and limitations of the techniques used for pore structure analysis of cement-based materials.
Author: Roberto J. Torrent
Publisher: CRC Press
Published: 2021-12-22
Total Pages: 579
ISBN-13: 0429012926
DOWNLOAD EBOOKDurability and service life design of concrete constructions have considerable socio-economic and environmental consequences, in which the permeability of concrete to aggressive intruders plays a vital role. Concrete Permeability and Durability Performance provides deep insight into the permeability of concrete, moving from theory to practice, and presents over 20 real cases, such as Tokyo’s Museum of Western Art, Port of Miami Tunnel and Hong Kong-Zhuhai-Macao sea-link, including field tests in the Antarctic and Atacama Desert. It stresses the importance of site testing for a realistic durability assessment and details the "Torrent Method" for non-destructive measurement of air-permeability. It also delivers answers for some vexing questions: Should the coefficient of permeability be expressed in m2 or m/s? How to get a "mean" pore radius of concrete from gas-permeability tests? Why should permeability preferably be measured on site? How can service life of reinforced concrete structures be predicted by site testing of gas-permeability and cover thickness? Practitioners will find stimulating examples on how to predict the coming service life of new structures and the remaining life of existing structures, based on site testing of air-permeability and cover thickness. Researchers will value theoretical principles, testing methods, as well as how test results reflect the influence of concrete mix composition and processing.
Author: Hong Zhao
Publisher:
Published: 1990
Total Pages: 56
ISBN-13:
DOWNLOAD EBOOKAuthor: Ya Wei
Publisher: Springer Nature
Published: 2022-11-14
Total Pages: 477
ISBN-13: 9811968837
DOWNLOAD EBOOKThis 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.
Author: J.C. Maso
Publisher: CRC Press
Published: 2004-03-01
Total Pages: 218
ISBN-13: 0203627253
DOWNLOAD EBOOKAn important new state-of-the-art report prepared by RILEM Technical Committee 108 ICC. It has been written by a team of leading international experts from the UK, USA, Canada, Israel, Germany, Denmark, South Africa, Italy and France. Research studies over recent years in the field of cement science have focused on the behaviour of the interfaces between the components of cement-based materials. The techniques used in other areas of materials science are being applied to the complex materials found in cements and concretes, and this book provides a significant survey of the present state of the art.
Author: Jens Villadsen
Publisher:
Published: 1992
Total Pages: 372
ISBN-13:
DOWNLOAD EBOOKAuthor: Sharon M. DeHayes
Publisher: ASTM International
Published: 1994
Total Pages: 154
ISBN-13: 0803118783
DOWNLOAD EBOOKAuthor: 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.