Pore Structure of Cement Based Materials

Author: Kalliopi K. Aligizaki
Publisher: CRC Press
ISBN: 1482271958
Format: PDF
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Pore 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.

Pore Structure and Freezing Resistance of Nanoclay Modified Cement Based Materials

Format: PDF, ePub
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Abstract : This paper presents a study of the effect of nanoclay on the freezing resistance behaviour of cement based materials. The pore structure in the cement pastes with the addition of nanoclay was examined through mercury intrusion porosimetry test. The influence of nanoclay addition on the frost resistance of cement mortar was intensively studied with freeze–thaw cycle test. The test results indicate that the addition of nanoclay refines the pore structure and reduces the porosity of cement paste. It was found that the most probable pore diameter, total specific pore volume and porosity of cement paste with 1% additive nanoclay decreased by 56·84, 22·58 and 18·48% respectively. The findings suggest that the addition of nanoclay will improve the frost resistance of cement mortar significantly. Compared to normal cement mortar, the reduction in weight loss was 55·88% and the improved compressive strength was 21·25% of cement mortar, with 1% additive nanoclay at 28 days curing age after 20 freeze–thaw cycles.

Measuring Monitoring and Modeling Concrete Properties

Author: Maria S. Konsta-Gdoutos
Publisher: Springer Science & Business Media
ISBN: 1402051042
Format: PDF
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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.

Nanotechnology in Construction

Author: Zdenek Bittnar
Publisher: Springer Science & Business Media
ISBN: 3642009808
Format: PDF, ePub, Docs
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The 3rd International Symposium on Nanotechnology in Construction (NICOM 3) follows the highly successful NICOM 1 (Paisley, UK 2003) and NICOM 2 (Bilbao, Spain 2005) Symposia. The NICOM3 symposium was held in Prague, Czech Republic from May 31 to June 2, 2009 under the auspices of the Czech Technical University in Prague. It was a cross-disciplinary event, bringing together R&D experts and users from different fields all with interest in nanotechnology and construction. The conference was aimed at: Understanding of internal structures of existing construction materials at nano-scale Modification at nano-scale of existing construction materials. Production and properties of nanoparticulate materials, nanotubes and novel polymers. Modeling and simulation of nanostructures. Instrumentation, techniques and metrology at nano-scale. Health and safety issues and environmental impacts related to nanotechnology during research, manufacture and product use. Review of current legislation. Societal and commercial impacts of nanotechnology in construction, their predictions and analysis.

Cement Based Materials for Nuclear Waste Storage

Author: Florence Bart
Publisher: Springer Science & Business Media
ISBN: 1461434459
Format: PDF
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As the re-emergence of nuclear power as an acceptable energy source on an international basis continues, the need for safe and reliable ways to dispose of radioactive waste becomes ever more critical. The ultimate goal for designing a predisposal waste-management system depends on producing waste containers suitable for storage, transportation and permanent disposal. Cement-Based Materials for Nuclear-Waste Storage provides a roadmap for the use of cementation as an applied technique for the treatment of low- and intermediate-level radioactive wastes. Coverage includes, but is not limited to, a comparison of cementation with other solidification techniques, advantages of calcium-silicate cements over other materials and a discussion of the long-term suitability and safety of waste packages as well as cement barriers.

Ion and Mass Transport in Cement based Materials

Author: R. Douglas Hooton
Publisher: Amer Ceramic Society
ISBN: 9781574981131
Format: PDF, ePub, Mobi
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Used ubiquitously, concrete must be durable; and because most degradation occurs as ions or fluid flow through the internal pore structure, the title subject is vital. Twenty-three papers from an international conference (October 1999, Toronto) cover mechanisms of transport (saturated and unsaturate

Cementitious Materials for Nuclear Waste Immobilization

Author: Rehab O. Abdel Rahman
Publisher: John Wiley & Sons
ISBN: 1118511972
Format: PDF, Kindle
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Cementitious materials are an essential part in any radioactive waste disposal facility. Conditioning processes such as cementation are used to convert waste into a stable solid form that is insoluble and will prevent dispersion to the surrounding environment. It is incredibly important to understand the long-term behavior of these materials. This book summarises approaches and current practices in use of cementitious materials for nuclear waste immobilisation. It gives a unique description of the most important aspects of cements as nuclear waste forms: starting with a description of wastes, analyzing the cementitious systems used for immobilization and describing the technologies used, and ending with analysis of cementitious waste forms and their long term behavior in an envisaged disposal environment. Extensive research has been devoted to study the feasibility of using cement or cement based materials in immobilizing and solidifying different radioactive wastes. However, these research results are scattered. This work provides the reader with both the science and technology of the immobilization process, and the cementitious materials used to immobilize nuclear waste. It summarizes current knowledge in the field, and highlights important areas that need more investigation. The chapters include: Introduction, Portland cement, Alternative cements, Cement characterization and testing, Radioactive waste cementation, Waste cementation technology, Cementitious wasteform durability and performance assessment.