1st Edition
Microwave-Assisted Concrete Technology Production, Demolition and Recycling
Microwave Technology: A Powerful Technique
The first book to combine microwave-assisted heating technology and concrete technology (covering production, demolition, and recycling), Microwave-Assisted Concrete Technology: Production, Demolition and Recycling explains the underlying concepts and fundamentals involved in the microwave-assisted heating of concrete. While most books on microwave heating focus on the behavior of microwaves, this text centers on the response of materials subjected to microwaves, and specifically concentrates on materials used in the concrete industry. A ready reference for the design of microwave-based equipment, the book describes how microwave-assisted heating technology may be harnessed in the production, demolition, and recycling of concrete. It covers microwave-assisted applications, the design concepts of microwave heating systems (generators and applicators) used in microwave-assisted concrete-processing methods, and process control techniques used to monitor the condition of concrete during the heating process.
Learn How to use the Microwave-Assisted Heating Process for Industry
The book is written from the perspective of modern practitioners in the construction industry, and addresses the technological, scientific, and environmental issues involved in replacing conventional approaches with microwave heating. The authors categorize the applications of microwave heating in concrete technology into three areas: microwave-assisted accelerated curing of concrete, microwave-assisted selective demolition and drilling of concrete, and the microwave-assisted recycling of concrete. They discuss sustainability and the environmental impact of incorporating sustainable concrete production, demolition, and recycling using microwave-assisted heating technologies, and environmentally friendly microwave heating applications.
This text covers:
- The basics of concrete-microwave field interactions
- Microwave-assisted concrete technologies for use in the production, demolition, and recycling of concrete as well as the control mechanisms required to ensure the efficiency of these methods
- The design of microwave heating applicators
Microwave-Assisted Concrete Technology: Production, Demolition and Recycling
does not require a familiarity with electromagnetism science and can be easily understood by civil engineers as well as by readers with little or no engineering background.Introduction
Microwave heating
Applications of microwave heating in concrete technology
Fundamentals of microwave heating
Electromagnetic properties
Microwave heating mechanism
Electromagnetic power transfer
Penetration depth and attenuation factor
Formulation of microwave power dissipation (dielectric loss)
Heat transfer and temperature rise in microwave heating of concrete
Mass transfer phenomenon and the pore pressure development in microwave-heated concrete
Microwave heating safety
Summary
References
Microwave-assisted accelerated curing of precast concrete
Background
Hydration of cement and strength development
Curing of concrete
Accelerated curing of precast concrete
Microwave curing of concrete
Summary
References
Microwave-assisted selective demolition of concrete
Introduction
Applications of selective concrete removal techniques
State-of-the-art selective concrete demolition techniques
Microwave-assisted demolition of concrete
Configuration of microwave-assisted selective demolition tools
Working principles of microwave-assisted selective demolition of concrete
Microwave-assisted drilling of concrete
Summary
References
Microwave-assisted concrete recycling
Introduction
State-of-the-art concrete-recycling technology
Properties of recycled concrete aggregates
Available standards for RCA
Main Factors lowering the quality of RCA
Elimination of impurities/contaminants
Removal of the adhering mortar
Summary
References
Process control in microwave heating of concrete
Introduction
Temperature measurement in microwave heating of concrete
Temperature monitoring of microwave-assisted concrete processes
Summary
References
Microwave heating cavities and applicators
Introduction
The main components of microwave heating systems
Microwave applicators: introduction and design basics
Applicators used in heating systems
Summary
References
Index
Biography
Dr. K.C. Gary Ong is an associate professor and deputy head (administration) in the Department of Civil and Environmental Engineering at the National University of Singapore. He is a past president of the Singapore Chapter of the American Concrete Institute, and of the Singapore Concrete Institute. His research interests include advanced composite materials, microwave-assisted concrete technology, durability and assessment of concrete structures, retrofitting, and sustainability; he has edited or coedited 18 conference proceedings and published more than 200 publications in journals and conference proceedings.
Dr. Ali Akbarnezhad is a lecturer in the School of Civil and Environmental Engineering at the University of New South Wales. His main areas of research include concrete technology, design for sustainability, sustainability assessment, construction technology, and information technology; he has published more than 30 papers in leading refereed journals and conference proceedings. He has been involved in microwave heating research and development for more than eight years and is the inventor of two microwave-assisted techniques.