Recycled Concrete

The civil engineering sector accounts for a significant percentage of global material and energy consumption and is a major contributor of waste material. The ability to recycle and reuse concrete and demolition waste is critical to reducing environmental impacts in meeting national, regional and global environmental targets. Handbook of recycled concrete and demolition waste summarises key recent research in achieving these goals. Part one considers techniques for managing construction and demolition waste, including waste management plans, ways of estimating levels of waste, the types and optimal location of waste recycling plants and the economics of managing construction and demolition waste. Part two reviews key steps in handling construction and demolition waste. It begins with a comparison between conventional demolition and construction techniques before going on to discuss the preparation, refinement and quality control of concrete aggregates produced from waste. It concludes by assessing the mechanical properties, strength and durability of concrete made using recycled aggregates. Part three includes examples of the use of recycled aggregates in applications such as roads, pavements, high-performance concrete and alkali-activated or geopolymer cements. Finally, the book discusses environmental and safety issues such as the removal of gypsum, asbestos and alkali-silica reaction (ASR) concrete, as well as life-cycle analysis of concrete with recycled aggregates. Handbook of recycled concrete and demolition waste is a standard reference for all those involved in the civil engineering sector, as well as academic researchers in the field. Summarises key recent research in recycling and reusing concrete and demolition waste to reduce environmental impacts and meet national, regional and global environmental targets Considers techniques for managing construction and demolition waste, including waste management plans, ways of estimating levels of waste, the types and optimal location of waste recycling plants Reviews key steps in handling construction and demolition waste

New Trends in Eco-efficient and Recycled Concrete describes different recycled materials that have been used in eco-efficient concrete, reviewing previous publications to identify the most effective recycled materials to be applied in concrete manufacture. New trends on eco-efficient concrete are presented, filling a gap in the market. Sections cover various recycled materials applied in concrete production, present the latest on the lifecycle analysis of recycled aggregate concrete, detail new trends in recycled aggregate concrete research, and finally, present updates on upscaling the use of recycled aggregate concrete and structural reliability. Focuses on new trends in recycled aggregate concrete and its applications (rather than the more subjective ‘sustainability’ aspects) Contains very important contributions from researchers in eco-efficient concrete, including Chi Sun Poon, Jorge de Brito, Valeria Corinaldesi, Francisco Agrela, etc. Presents a ‘one stop’ reference for a graduate course on sustainable construction

Recycled Concrete: Technologies and Performance presents the latest technologies that can be applied to produce high and consistent quality recycled aggregate for use in structural concrete, and in alternative binders like Geopolymer and other types of concrete. The book discusses the lifecycle assessment of implementing sustainable construction technologies and evaluates the environmental impacts of recycled concrete in construction applications. It covers their use in the production of durable recycled concrete, their reduced environmental impact, quality improvement techniques, and more, making it valuable and relevant for civil and structural engineers, recycle industry managers, ready-mix and precast concrete producers and researchers. Discusses alternative binding materials for recycled aggregate Covers how to use concrete with recycled aggregates, along with the advantages and disadvantages Provides guidance on using recycled concrete aggregates, designing mixtures and how to best produce RCAs

Use of Recycled Plastics in Eco-efficient Concrete looks at the processing of plastic waste, including techniques for separation, the production of plastic aggregates, the production of concrete with recycled plastic as an aggregate or binder, the fresh properties of concrete with plastic aggregates, the shrinkage of concrete with plastic aggregates, the mechanical properties of concrete with plastic aggregates, toughness of concrete with plastic aggregates, modulus of elasticity of concrete with plastic aggregates, durability of concrete with plastic aggregates, concrete plastic waste powder with enhanced neutron radiation shielding, and more, thus making it a valuable reference for academics and industrial researchers. Describes the main types of recycled plastics that can be applied in concrete manufacturing Presents, for the first time, state-of-the art knowledge on the properties of conventional concrete with recycled plastics Discusses the technological challenges for concrete manufactures for mass production of recycled concrete from plastic waste

In recent years, research on recycled aggregate concrete has become a hot issue in the field of civil engineering. This paper mainly studies the size effects on compressive and tensile strengths of the recycled aggregate concrete. Firstly, four sets of recycled concrete cube specimens with different sizes are produced in the laboratory. Secondly, the experiments on compressive and tensile strengths are carried out to obtain the rules of the strength value with the change of the specimen size. Thirdly, a standard neutrosophic number is proposed and used in modelling the size effect law more reasonably. According to the experimental results, it was found that the compressive and tensile strengths of recycled concrete both have obvious size effects. In general, the strength value decreases gradually with the increase of specimen size. Using the standard neutrosophic number, the proposed new formula on size effect law is more suitable for tackling the indeterminacy in the experimental data.

Multi-functional Concrete with Recycled Aggregates consists of chapters covering multiple aspects of sustainable concrete materials, inclusive of engineering, environmental, policy, and management factors. With contributing authors worldwide from a variety of disciplines bridged by the theme of sustainability of concrete, this book aims to provide an overview of existing research and practices of traditional recycled aggregate concrete; introduce the latest studies of high-performance concrete adopting recycled aggregates from C&D wastes; disseminate the latest findings of multifunctional recycled aggregate concrete by achieving the waste reuse while realizing other environmental sustainability goals; and link the multipurpose sustainable concrete technical development into the C&D waste management. Features state-of-the-art research and practices on adopting construction and demolition (C&D) wastes for production of recycled aggregate concrete (RAC) Discusses the managerial aspects of C&D waste management by promoting the usage of different types of RAC from technical, policy, and managerial perspectives Covers the entire waste reuse model to enhance the reuse and recycling rate of C&D wastes Includes recent developments in high-performance RAC and other new functions in RAC (e.g., pervious RAC designed to absorb air pollutants) are also presented Covers state-of-the art research and developments in engineering applications and properties of RAC, such as pervious RAC, self-cleaning RAC and High-performance RAC

The report confirms that removal, re-use wholly or in part, and complete demolition and recycling of CGS (Concrete Gravity Structures) are technically feasible. Governmental policy is consistently moving towards rewarding those industries that contribute to environmentally friendly management. Recycled material is an environmentally friendly alternative that incurs reduced consumption of virgin material and less waste disposal. There is no reason to believe that offshore concrete should be less suitable for recycling than other concrete. For some platforms the most suitable vessel for carrying the topside ashore may prove to be the CGS itself, as it has to be removed from its position anyhow. A successful removal, however, requires a well planned and controlled operation, necessitating a profound knowledge and understanding of the structure, both in its technical and operational aspects. An important instrument to acquire such knowledge are the records kept during the platform's history describing the main parmeters and events. The report treats the aspects of re-use, removal, demolition methods and recycling of materials and refers to all known international and national regulations in this field, adding a comprehensive list of references and usable internet links.

This book reports on the physical and mechanical characterization of Recycled Aggregate Concrete (RAC), produced through a partial-to-total replacement of ordinary aggregates with what have been dubbed Recycled Concrete Aggregates (RCAs). It proposes a theoretical framework for understanding the relationships between RCAs and RCA, and for predicting the resulting behavior of RAC. The book demonstrates that in the case of RAC two additional parameters have to be taken into account than with ordinary aggregates, due to the composite nature and higher porosity of RCAs. By extending Abrams’ Law for Recycled Aggregate Concrete, it represents a first step in the formulation of a general model for predicting the properties of RAC. The theoretical approach presented here addresses an important gap in the literature and is expected to stimulate new research on the use of this more sustainable form of concrete in structural applications.