Electrical Resistivity And Temperature Of Fresh Cement Paste As Indicators For Setting Time
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Electrical Resistivity And Temperature Of Fresh Cement Paste As Indicators For Setting Time
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Author : Ahmad Shahroodi
language : en
Publisher:
Release Date : 2021
Electrical Resistivity And Temperature Of Fresh Cement Paste As Indicators For Setting Time written by Ahmad Shahroodi and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2021 with categories.
The process, rate, and quality of cement hydration (a complex physical-chemical process) affect the properties development of concrete, such as its compressive strength, penetrability, and setting. Among all, setting time is one of the important properties for the concrete industry, as it is the factor in determining the consolidation, finishing, and curing time of a concrete pour. Inadequate determination of concrete setting time will result in improper finishing, formation of cold joints between layers of concrete, and curing time delay. Therefore, short- and long-term performance of concrete, concrete durability, and its life span will be affected. Concrete setting time proceeds from an initial stage (end of concrete pouring and consolidation) to a final stage (end of finishing process and beginning of curing) with the hydration of cement particles in the matrix of concrete. The accurate determination of the setting time in concrete projects has always been a question. Setting time is measured in laboratory setups by the traditional method of the Vicat needle (as standardized in ASTM C191). However, the field condition of a concrete pour is different from a lab set up, so the importance of replacing a lab-based setting time test with a field applicable method is out of question. This research project studies the feasibility of using a practical and non-destructive technique to detect the actual concrete setting time and its development in a reasonable amount of time. In this research, the electrical properties and internal temperature of cementing-based mixtures are monitored over the first 24 hours of hydration. The electrical properties of concrete and cement-based materials and corresponding internal temperature are influenced by many factors affected by cement hydration, similar to the setting time. The main goal of this research project is to establish a predicting method for the fresh cement paste setting time by monitoring either the electrical properties or the internal temperature of the mixture. To isolate the effect of the specimen geometry, electrical resistivity has been chosen as the electrical properties' representative in this study. It is measured by a novel resistivity-meter setup. However, to develop a time-saving and accurate method, microstructure factors affecting the electrical resistivity development of fresh cement paste need to be studied. These factors are (1) the ionic concentration and ionic variation in the pore solution (in the liquid phase of the cement paste microstructure), and (2) the hydration products formation and crystallization (or the physical characteristics of the cement paste microstructure). Since formation of hydration products and crystallization are exothermic, the changes in the internal temperature of the materials are also monitored. Finally, reliable predicting indicators, electrical resistivity and internal temperature values, which are influenced by not only the fresh stage ionic concentration, but also by the development and changes in the physical characteristics of microstructure are proposed to the industry.
Dictionary Of Concrete Technology
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Author : Natt Makul
language : en
Publisher: Springer Nature
Release Date : 2025-06-04
Dictionary Of Concrete Technology written by Natt Makul and has been published by Springer Nature this book supported file pdf, txt, epub, kindle and other format this book has been release on 2025-06-04 with Technology & Engineering categories.
The Dictionary of Concrete Technology is a thorough resource encapsulating the progressions in concrete technology, which connects traditional methodologies with contemporary innovations. With over 1,000 meticulously selected terminologies, it provides clear definitions, context, and cross-references, catering to professionals, students, and researchers. This dictionary addresses the necessity for an updated lexicon to keep pace with the swift advancements in materials science and civil engineering. Compiled through years of collaboration with scholars, engineers, and industry specialists, it ensures precision and relevance. Organized alphabetically, with detailed elucidations, the dictionary is straightforward to navigate, supported by an extensive index and references for further exploration. Focusing on both current methodologies and emerging trends, such as sustainability and digital construction, it offers insights into the future of the discipline. Designed as an essential instrument, it continues evolving with updates, supporting its users’ quest for knowledge and excellence.
Mineral Admixtures In Cement And Concrete
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Author : Jayant D. Bapat
language : en
Publisher: CRC Press
Release Date : 2012-08-06
Mineral Admixtures In Cement And Concrete written by Jayant D. Bapat and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-08-06 with Technology & Engineering categories.
Written to meet the requirements of engineers working in construction and concrete manufacturing, Mineral Admixtures in Cement and Concrete focuses on how to make more workable and durable concrete using mineral admixtures. In particular, it covers pulverized fuel ash (PFA), blast furnace slag (BFS), silica fume (SF), rice husk ash (RHA), and metak
Ultra High Performance Concrete
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Author : Caijun Shi
language : en
Publisher: CRC Press
Release Date : 2024-02-23
Ultra High Performance Concrete written by Caijun Shi and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2024-02-23 with Technology & Engineering categories.
Ultra-high performance concrete (UHPC) is an advanced cement-based composite material with compressive strength of over 120 MPa, high toughness, and superior durability. Since its development in the early 1990s, UHPC has attracted great interest worldwide due to its advantages. This book covers material selection and mixture design methods for developing UHPC, as well as the performance of UHPC, including fresh and hardened properties, setting and hardening, dimensional stability, static and dynamic properties, durability, long-term properties, and self-healing properties. A range of potential applications and case studies are presented to illustrate how UHPC meets requirements for lightweight, high-rise, large-span, heavy-load bearing, fast-construction, and highly durable structures in civil and construction engineering. Also introduced is a typical new concrete, seawater sea-sand UHPC, which avoids the use of freshwater and river sand in marine construction. The first book to fully cover the design, performance, and applications of UHPC, this is ideal for concrete technologists, designers, contractors, and researchers.
Significance Of Tests And Properties Of Concrete And Concrete Making Materials
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Author : Joseph F. Lamond
language : en
Publisher: ASTM International
Release Date : 2006
Significance Of Tests And Properties Of Concrete And Concrete Making Materials written by Joseph F. Lamond and has been published by ASTM International this book supported file pdf, txt, epub, kindle and other format this book has been release on 2006 with Technology & Engineering categories.
Pavement Engineering
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Author : Rajib B. Mallick
language : en
Publisher: CRC Press
Release Date : 2022-12-30
Pavement Engineering written by Rajib B. Mallick and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2022-12-30 with Technology & Engineering categories.
Pavement Engineering: Principles and Practice examines a wide range of topics in asphalt and concrete pavements from soil preparation and structural design to life cycle costing and economic analysis. This updated Fourth Edition covers all concepts and practices of pavement engineering in terms of materials, design, and construction methods for both flexible and rigid pavements and includes the latest developments in recycling, sustainable pavement materials, and resilient infrastructure. New and updated topics include material characterization concepts and tests, pavement management concepts, probabilistic examples of life cycle cost analysis, end-of-life considerations, waste plastic in asphalt, pervious concrete, pavement monitoring instrumentation and data acquisition, and more. The latest updated references, state of the art reviews, and online resources have also been included.
Aci Materials Journal
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Author :
language : en
Publisher:
Release Date : 1988
Aci Materials Journal written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1988 with Concrete categories.
Petroleum Abstracts Literature And Patents
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Author :
language : en
Publisher:
Release Date : 1989
Petroleum Abstracts Literature And Patents written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1989 with Petroleum categories.
Concrete Abstracts
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Author :
language : en
Publisher:
Release Date : 1985
Concrete Abstracts written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1985 with Cement categories.
12th Phd Symposium In Prague Czech Rep
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Author : FIB – International Federation for Structural Concrete
language : en
Publisher: FIB - Féd. Int. du Béton
Release Date : 2018-08-01
12th Phd Symposium In Prague Czech Rep written by FIB – International Federation for Structural Concrete and has been published by FIB - Féd. Int. du Béton this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-08-01 with Technology & Engineering categories.