Microscale Analysis Of Cemented Paste Backfill Microform
DOWNLOAD
Download Microscale Analysis Of Cemented Paste Backfill Microform PDF/ePub or read online books in Mobi eBooks. Click Download or Read Online button to get Microscale Analysis Of Cemented Paste Backfill Microform book now. This website allows unlimited access to, at the time of writing, more than 1.5 million titles, including hundreds of thousands of titles in various foreign languages. If the content not found or just blank you must refresh this page
Microscale Analysis Of Cemented Paste Backfill Microform
DOWNLOAD
Author : Dragana Simon
language : en
Publisher: Library and Archives Canada = Bibliothèque et Archives Canada
Release Date : 2005
Microscale Analysis Of Cemented Paste Backfill Microform written by Dragana Simon and has been published by Library and Archives Canada = Bibliothèque et Archives Canada this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005 with categories.
This study shows that wave-based techniques provide insight into some of the factors that affect the behaviour of CPB. Electromagnetic wave-based measurements are sensitive to changes in structure, free water content, bound water content, and ion availability and/or mobility. This research shows that the effective conductivity is a useful parameter to monitor the hydration process, even in low cement content pastes. Shear wave-based measurements are a useful tool to monitor the stiffness evolution in CPB. Apparent yield stress measurements are sensitive to particle-particle interactions and reflect changes in the material's composition, including water content, binder content and type, and chemical additives. All tests show that during the early stages, Portland cement hydration has little effect on the microstructure development, stiffness and flow characteristics of cement-containing pastes. The macroscopic properties of cemented paste backfill (CPB), including fluidity and strength, depend on particle-particle and particle-fluid interactions; thus, it is important to determine the fundamental interactions between the paste constituents to optimize paste design. Specific topics of interest in this study include the effects of paste composition (e.g., binder content and type, and pore fluid chemistry) on the microstructure development, and electromagnetic, rheological and mechanical properties (e.g., setting time, unconfined compressive strength and stiffness) with time. The effect of the pore fluid chemistry on the properties of the CPB depends on the type and amount of the additive. In CPB, calcium chloride and sodium chloride accelerate cement hydration and improve the UCS during the first six months of hydration. Conversely, ferric chloride and hydrochloric acid retard the hydration and setting of CPB. The tested superplasticizers retard cement hydration, increase the UCS and lower the apparent yield stress of CPB. A drawback to using the superplasticizers tested in this study is that a high shear stress is required to re-initiate flow in the pastes.
In Situ Properties And Liquefaction Potential Of Cemented Paste Backfill Microform
DOWNLOAD
Author : Kim-Anne Le Roux
language : en
Publisher: National Library of Canada = Bibliothèque nationale du Canada
Release Date : 2004
In Situ Properties And Liquefaction Potential Of Cemented Paste Backfill Microform written by Kim-Anne Le Roux and has been published by National Library of Canada = Bibliothèque nationale du Canada this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004 with categories.
Mercury intrusion porosimetry as well as semi-qualitative image analysis techniques such as scanning electron microscopy, microCT and visual analysis software were used to develop an understanding of the structure developed in field CPB in both the macro and micro scale. Standard oedometer consolidation testing with a modified loading rate was used to investigate the interrelationship of loading rate, which simulates rate of paste accumulation in a stope and the hydration of binder of the paste. The results show that the structure that develops is sensitive to both the binder content of the CPB and the rate of paste accumulation. Cemented paste backfill (CPB) has gained increasing popularity in the last 5 to 10 years and is used routinely in several mines. However, most of the CPB designs are based on laboratory prepared CPB material properties and there is growing awareness that the field CPB may be different from the laboratory prepared material. A field based investigation quantified the extent to which the field material differs from laboratory material. Not only is the field material more heterogeneous than expected, but on average it has a higher void ratio and a lower degree of saturation. These differences impact the performance of the field material. Numerical analysis using FLAC 3D was undertaken to show the influence of the field condition on the stability of the CPB. This research provides practical recommendations for industrial application and provides a framework for further investigation of CPB. Several research projects arising from this initial work are already underway through the Lassonde Institute at the University of Toronto, and several more are at the proposal stage. Static and dynamic liquefaction testing of early age CPB showed that liquefaction due to self-weight alone is unlikely but that blasting too close to the CPB can mobilize the material. Practical recommendations such as limiting blasting in proximity to early age CPB and cordoning off vulnerable areas during the critical initial 24 hr period that the paste is vulnerable to dynamic liquefaction. The cyclic liquefaction results are believed to be the first reported for cemented paste backfill.
Plant Electrophysiology
DOWNLOAD
Author : Alexander G. Volkov
language : en
Publisher: Springer Science & Business Media
Release Date : 2007-04-19
Plant Electrophysiology written by Alexander G. Volkov and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007-04-19 with Science categories.
This book compiles new findings in plant electrophysiology from the work of internationally renowned experts in the fields of electrophysiology, bio-electrochemistry, biophysics, signal transduction, phloem transport, tropisms, ion channels, plant electrochemistry, and membrane transport. Opening with a historical introduction, the book reviews methods in plant electrophysiology, introducing such topics as measuring membrane potentials and ion fluxes, path-clamp technique, and electrochemical sensors. The coverage includes experimental results and their theoretical interpretation.
Masters Theses In The Pure And Applied Sciences
DOWNLOAD
Author : Wade H. Shafer
language : en
Publisher: Springer Science & Business Media
Release Date : 2012-12-06
Masters Theses In The Pure And Applied Sciences written by Wade H. Shafer and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-12-06 with Science categories.
Masters Theses in the Pure and Applied Sciences was first conceived, published, SIld disseminated by the Center for Information and Numerical Data Analysis and Synthesis (CINDAS) * at Purdue University in 1957, starting its coverage of theses with the academic year 1955. Beginning with Volume 13, the printing and dissemination phases of the activity were transferred to University Microfilms/Xerox of Ann Arbor, Michigan, with the thought that such an arrangement would be more beneficial to the academic and general scientific and technical community. After five years of this joint undertaking we had concluded that it was in the interest of all con cerned if the printing and distribution of the volumes were handled by an interna and broader dissemination. tional publishing house to assure improved service Hence, starting with Volume 18, Masters Theses in the Pure and Applied Sciences has been disseminated on a worldwide basis by Plenum Publishing Cor poration of New York, and in the same year the coverage was broadened to include Canadian universities. All back issues can also be ordered from Plenum. We have reported in Volume 30 (thesis year 1985) a total of 12,400 theses titles from 26 Canadian and 186 United States universities. We are sure that this broader base for these titles reported will greatly enhance the value of this important annual reference work.
Time Saver Standards For Architectural Design Data
DOWNLOAD
Author : John Hancock Callender
language : en
Publisher: McGraw-Hill Companies
Release Date : 1974
Time Saver Standards For Architectural Design Data written by John Hancock Callender and has been published by McGraw-Hill Companies this book supported file pdf, txt, epub, kindle and other format this book has been release on 1974 with Architecture categories.
Power Of A Module
DOWNLOAD
Author : Mathematics Vision Project
language : en
Publisher:
Release Date : 2014-07-01
Power Of A Module written by Mathematics Vision Project and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014-07-01 with categories.
Antifascisms
DOWNLOAD
Author : David Ward
language : en
Publisher: Fairleigh Dickinson Univ Press
Release Date : 1996
Antifascisms written by David Ward and has been published by Fairleigh Dickinson Univ Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 1996 with History categories.
This book is an in-depth analysis of three of the most crucial years in twentieth-century Italian history, the years 1943-46. After more than two decades of a Fascist regime and a disastrous war experience during which Italy changed sides, these years saw the laying of the political and cultural foundations for what has since become known as Italy's First Republic. Drawing on texts from the literature, film, journalism, and political debate of the period, Antifascisms offers a thorough survey of the personalities and positions that informed the decisions taken in this crucial phase of modern Italian history.
Time Saver Standards For Architectural Design
DOWNLOAD
Author : Michael J. Crosbie
language : en
Publisher: McGraw Hill Professional
Release Date : 2005-01-06
Time Saver Standards For Architectural Design written by Michael J. Crosbie and has been published by McGraw Hill Professional this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005-01-06 with Architecture categories.
Since its release in 1946, this has been one of the most widely recognized and respected resources for architects, engineers, and designers, bringing together the knowledge, techniques, and skills of some of the most well-known experts in the field. The new Eighth Edition takes a fresh, visual approach to the information architects need to access quickly, helping them save time and money by assuring they get it right the first time. Readers will find timely, new chapters on building security, natural disaster mitigation, building diagnostics, facility management, and much more.
Cahokia
DOWNLOAD
Author : Timothy R. Pauketat
language : en
Publisher: Penguin
Release Date : 2009-07-30
Cahokia written by Timothy R. Pauketat and has been published by Penguin this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009-07-30 with History categories.
The fascinating story of a lost city and an unprecedented American civilization located in modern day Illinois near St. Louis While Mayan and Aztec civilizations are widely known and documented, relatively few people are familiar with the largest prehistoric Native American city north of Mexico-a site that expert Timothy Pauketat brings vividly to life in this groundbreaking book. Almost a thousand years ago, a city flourished along the Mississippi River near what is now St. Louis. Built around a sprawling central plaza and known as Cahokia, the site has drawn the attention of generations of archaeologists, whose work produced evidence of complex celestial timepieces, feasts big enough to feed thousands, and disturbing signs of human sacrifice. Drawing on these fascinating finds, Cahokia presents a lively and astonishing narrative of prehistoric America.
Masters Theses In The Pure And Applied Sciences
DOWNLOAD
Author : W. H. Shafer
language : en
Publisher: Springer
Release Date : 1982-02-01
Masters Theses In The Pure And Applied Sciences written by W. H. Shafer and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 1982-02-01 with Science categories.
Masters Theses in the Pure and Applied Sciences was first conceived, published, and dis seminated by the Center for Information and Numerical Data Analysis and Synthesis (CINDAS) * at Purdue University in 1957, starting its coverage of theses with the academic year 1955. Beginning with Volume 13, the printing and dissemination phases of the ac tivity were transferred to University Microfilms/Xerox of Ann Arbor, Michigan, with the thought that such an arrangement would be more beneficial to the academic and general scientific and technical community. After five years of this joint undertaking we had concluded that it was in the interest of all concerned if the printing and distribution of the volume were handled by an international publishing. house to assure improved service and broader dissemination. Hence, starting with Volume 18, Masters Theses in the Pure and Applied Sciences has been disseminated on a worldwide basis by Plenum Publishing Corporation of New York, and in the same year the coverage was broadened to include Canadian universities. All back issues can also be ordered from Plenum. We have reported in Volume 25 (thesis year 1980) a total of 10,308 theses titles from 27 Canadian and 214 United States universities. We are sure that this broader base for theses titles reported will greatly enhance the value of this important annual reference work. While Volume 25 reports theses submitted in 1980, on occasion, certain universities do report theses submitted in previous years but not reported at the time.