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Use Of Recycled Aggregates In High Strength Fibrous Concrete For Sustainable Development
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Book Synopsis Use of Recycled Aggregates in High Strength Fibrous Concrete for Sustainable Development by : K. Jagannadha Rao
Download or read book Use of Recycled Aggregates in High Strength Fibrous Concrete for Sustainable Development written by K. Jagannadha Rao and published by . This book was released on 2012 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The depleting sources of natural aggregate and disposal problem of demolished waste have prompted the researchers to take up studies on the use of Recycled Concrete Aggregate (RCA) in structural concrete. The advancement in high rise buildings and the prestressed concrete technology have given impetus for making concrete of high strength. Also, it is well-known from the literature that the use of fibers imparts ductility and high-energy absorption characteristics to concrete. The present work is aimed at determining the suitability of glass and polyester fibers for use in high strength structural Recycled Aggregate Concrete (RAC). Fresh and hardened state properties of fibrous RAC (50% RCA) with glass and polyester fibers are compared with the corresponding fibrous concrete with natural aggregates. The compressive, split tensile and flexural strengths of high strength concrete (compressive strength >50 Mpa) with 0% RCA and 50% RCA increased, as the fiber content increased with maximum values of these strengths at 0.03% of glass fibers, while the optimum polyester fiber content was found to be 0.02%. Plain concrete beams with 0% RCA and 50% RCA failed once the first crack was initiated, but the large deflections of fibrous concrete beams before failure indicated improved ductility of these beams with the addition of glass/polyester fibers.
Book Synopsis Recycled Aggregate in Concrete by : Jorge de Brito
Download or read book Recycled Aggregate in Concrete written by Jorge de Brito and published by Springer Science & Business Media. This book was released on 2012-11-28 with total page 453 pages. Available in PDF, EPUB and Kindle. Book excerpt: Concrete is the most used man-made material in the world since its invention. The widespread use of this material has led to continuous developments such as ultra-high strength concrete and self-compacting concrete. Recycled Aggregate in Concrete: Use of Industrial, Construction and Demolition Waste focuses on the recent development which the use of various types of recycled waste materials as aggregate in the production of various types of concrete. By drawing together information and data from various fields and sources, Recycled Aggregate in Concrete: Use of Industrial, Construction and Demolition Waste provides full coverage of this subject. Divided into two parts, a compilation of varied literature data related to the use of various types of industrial waste as aggregates in concrete is followed by a discussion of the use of construction and demolition waste as aggregate in concrete. The properties of the aggregates and their effect on various concrete properties are presented, and the quantitative procedure to estimate the properties of concrete containing construction and demolition waste as aggregates is explained. Current codes and practices developed in various countries to use construction and demolition waste as aggregates in concrete and issues related to the sustainability of cement and concrete production are also discussed. The comprehensive information presented in Recycled Aggregate in Concrete: Use of Industrial, Construction and Demolition Waste will be helpful to graduate students, researchers and concrete technologists. The collected data will also be an essential reference for practicing engineers who face problems concerning the use of these materials in concrete production.
Book Synopsis Recycled Aggregate in Concrete by : Jorge de Brito
Download or read book Recycled Aggregate in Concrete written by Jorge de Brito and published by Springer. This book was released on 2012-11-21 with total page 448 pages. Available in PDF, EPUB and Kindle. Book excerpt: Concrete is the most used man-made material in the world since its invention. The widespread use of this material has led to continuous developments such as ultra-high strength concrete and self-compacting concrete. Recycled Aggregate in Concrete: Use of Industrial, Construction and Demolition Waste focuses on the recent development which the use of various types of recycled waste materials as aggregate in the production of various types of concrete. By drawing together information and data from various fields and sources, Recycled Aggregate in Concrete: Use of Industrial, Construction and Demolition Waste provides full coverage of this subject. Divided into two parts, a compilation of varied literature data related to the use of various types of industrial waste as aggregates in concrete is followed by a discussion of the use of construction and demolition waste as aggregate in concrete. The properties of the aggregates and their effect on various concrete properties are presented, and the quantitative procedure to estimate the properties of concrete containing construction and demolition waste as aggregates is explained. Current codes and practices developed in various countries to use construction and demolition waste as aggregates in concrete and issues related to the sustainability of cement and concrete production are also discussed. The comprehensive information presented in Recycled Aggregate in Concrete: Use of Industrial, Construction and Demolition Waste will be helpful to graduate students, researchers and concrete technologists. The collected data will also be an essential reference for practicing engineers who face problems concerning the use of these materials in concrete production.
Book Synopsis Recent Advances on Green Concrete for Structural Purposes by : Joaquim A.O. Barros
Download or read book Recent Advances on Green Concrete for Structural Purposes written by Joaquim A.O. Barros and published by Springer. This book was released on 2017-05-29 with total page 427 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is mainly based on the results of the EU-funded UE-FP7 Project EnCoRe, which aimed to characterize the key physical and mechanical properties of a novel class of advanced cement-based materials incorporating recycled powders and aggregates and/or natural ingredients in order to allow partial or even total replacement of conventional constituents. More specifically, the project objectives were to predict the physical and mechanical performance of concrete with recycled aggregates; to understand the potential contribution of recycled fibers as a dispersed reinforcement in concrete matrices; and to demonstrate the feasibility and possible applications of natural fibers as a reinforcement in cementitious composites. All of these aspects are fully covered in the book. The opening chapters explain the material concept and design and discuss the experimental characterization of the physical, chemical, and mechanical properties of the recycled raw constituents, as well as of the cementitious composite incorporating them. The numerical models with potentialities for describing the behavior at material and structural level of constructions systems made by these composites are presented. Finally, engineering applications and guidelines for production and design are proposed.
Book Synopsis High-Performance Eco-Efficient Concrete by : Carlos Thomas
Download or read book High-Performance Eco-Efficient Concrete written by Carlos Thomas and published by MDPI. This book was released on 2021-05-26 with total page 278 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is dedicated to “High-Performance Eco-Efficient Concrete” and concrete fatigue behavior, more sustainable construction materials, capable of complying with quality standards and current innovation policies, aimed at saving natural resources and reducing global pollution. The development of self-compacting concretes with electric arc furnace slags is a further achievement. In addition, the technical and economic viability of using coarse recycled aggregates from crushed concrete in shotcrete, enhanced quality and reduced on-site construction time are the basic features of prefabricated bridge elements and systems, biomass bottom ash as aluminosilicate precursor and phosphogypsum were discussed. On the other hand, basalt fiber improving the mechanical properties and durability of reactive powder concrete, alkali-activated slag and high-volume fly ash and the potential of phosphogypsum as secondary raw material in construction industry, the effects of fly ash on the diffusion, bonding, and microproperties of chloride penetration in concrete were studied. Increasing amounts of sustainable concretes are being used as society becomes more aware of the environment. Finally, the circular economy as an economic model of production and consumption that involves reusing, repairing, refurbishing, and recycling materials after their service life are presented in this book.
Book Synopsis Recycled Aggregate Concrete by : Natt Makul
Download or read book Recycled Aggregate Concrete written by Natt Makul and published by CRC Press. This book was released on 2023-04-26 with total page 421 pages. Available in PDF, EPUB and Kindle. Book excerpt: Recycled Aggregate Concrete (RAC) as a sustainable material is gaining increasing importance in the construction industry. This book discusses properties, specifications, and applications of RAC and offers readers insight into current research and advances in the development and utilization of RAC. It shares information gathered about concretes that use RCA (Recycled Concrete Aggregate, a component of RAC), as well as findings and conclusions. This book: • Presents principles of RAC, including theories and experiments • Describes advanced behavior and properties • Covers specifications and codes • Highlights best practices • Summarizes the use of RAC in sustainable concrete construction • Features scientific findings, citations of reliable sources, conclusions, and recommendations that ensure the book is accessible to various levels of expertise This book will be useful for researchers, concrete scientists, technologists, practicing engineers, and advanced students interested in reusing construction waste for sustainable construction practices; it will help them strive toward meeting the UN Sustainable Development Goals (SDGs).
Book Synopsis Utilization of Recycled Coarse Aggregates to Develop High Strength Concrete by : Sufiyanu O. Momoh
Download or read book Utilization of Recycled Coarse Aggregates to Develop High Strength Concrete written by Sufiyanu O. Momoh and published by . This book was released on 2017 with total page 212 pages. Available in PDF, EPUB and Kindle. Book excerpt: The use of recycled coarse concrete aggregates (RCA) for the construction of road and other non-structural concrete has become a common practice these days. With the increasing demand of concrete, there has been an increase in the demand of natural coarse aggregate (NCA), which has sparked the research on the use of recycled coarse aggregate in structural concrete as an alternative sustainable solution. The objective of this study was to produce high strength concrete using recycled coarse aggregates. ACI 211.4R-5 (1998) suggests that concrete yielding compressive strength of over 6000 psi at 28 days of curing can be considered as high strength concrete. Therefore, various concrete mixes containing different amounts of RCA were tested to determine the optimum replacement of NCA with RCA to obtain the targeted compressive strength of 6000 psi at 28 days of curing. The study was divided into two phases. During the first phase, the effect of using recycled coarse aggregate (RCA) and pozzolan such as micro silica fume (MSF) to make high strength concrete was investigated. Due to inconsistent results from this phase of the study, the second phase of the study consisted of reinvestigating the effect of using recycled coarse aggregate (RCA) to make high strength concrete without micro silica fume by narrowly following the recommendations of ACI 211.4R-5 (1998). In addition, Part 2 of this phase consisted of evaluating the effect of the quantity of cement on the compressive strength of RCA concrete compared to the concrete mixes prepared using 100% NCA. This goal of this part of the study was to determine if there is an optimum amount of cement beyond which the strength gain is minimal. In the first phase of this study, five concrete mixes consisting of 0%, 25%, 50%, 75%, and 100% replacement (by volume) of natural coarse aggregates with recycled concrete coarse aggregates were made using a targeted water to cement (w/c) ratio of 0.4. These mixes were tested after curing periods of 7, 14, and 28 days for compressive strength and after a curing period of 28 days for splitting tensile strength. Also, five additional mixes were prepared and tested using the same mix proportions but using micro silica fume to replace 25% of the portland cement. The results presented show that the addition of micro silica fume (MSF) in all the mixes increases the compressive and tensile strength of the concrete mixes. However, trends of the results from this phase of the study were inconsistent with those available in published literature.. Further scrutiny of the results revealed that the quantity of cement and water used in these mixes were not sufficient for the quantity of aggregates used in the mix designs, thereby, resulting in dry concrete mixes with low slumps causing ambiguities in the results. Therefore, the second phase of the study was initiated which also consisted of two parts. The first part (Part 1) of this phase involved studying the effects of recycled coarse aggregates in concrete, as was done in Phase 1, but the mixes were designed based on the ACI 211.4R-5 (1998) recommendation. Published literature and results from this study show that the recycled coarse aggregates have substantially higher loss of material when subjected to wearing conditions, probably due to weaker cement paste layer and sand particles loosely sticking at the surface. Therefore, during Part 2 of Phase 2 of the study, various quantities of cement i.e., 650 lbs./yd3, 675 lbs./yd3, 700 lbs./yd3 and 725 lbs./yd 3 were used in concrete mixes consisting of 100% RCA and 100% NCA in an effort to determine the optimum amount of cement beyond which there is minimal increase in the compressive strength of concrete made with 100% RCA. The results presented show that as the quantity of cement increases, the strength of the concrete made out of both, the natural and the recycled coarse aggregates increases. It is also observed that while the improvement in strength of the concrete made with 100% natural coarse aggregate increases consistently at about 6% for every additional 25 lbs/yd3 of cement, the rate of increase in the compressive strength of concrete made out of recycled coarse aggregates gradually decreases.
Book Synopsis Reuse of Concrete for Sustainable Development by : Prachi Singh
Download or read book Reuse of Concrete for Sustainable Development written by Prachi Singh and published by GRIN Verlag. This book was released on 2018-10-02 with total page 17 pages. Available in PDF, EPUB and Kindle. Book excerpt: Document from the year 2015 in the subject Environmental Sciences, grade: 8.44, , course: M.Tech., language: English, abstract: Concrete is the most widely used construction material for infrastructure needs in the Asian region and in the world. Unfortunately, the concrete industry is one of the largest consumers of natural resources and energy, and is responsible for large emissions of carbon dioxide that is one of the greenhouse gases responsible for global warming. It is imperative that the concrete industry must be in an active role of balancing the infrastructure needs and the protection of environment. This work presents a summary of some recent research closely associated with the sustainable development of concrete technology. The research projects include study and analysis of: - Causes of deterioration of concrete structures, problems at construction sites that causes early deterioration of concrete structures. In addition to above this book also presents some environmentally-friendly and sustainable concrete technology including the use of supplementary cementing materials (SCM), recycling concrete and other materials, enhancement of service life of concrete structures. Emerging technologies that have the potential to significantly contribute to sustainable concrete industry and barriers against reuse are presented at the end of book.
Book Synopsis New Trends in Recycled Aggregate Concrete by : Jorge de Brito
Download or read book New Trends in Recycled Aggregate Concrete written by Jorge de Brito and published by MDPI. This book was released on 2019-07-15 with total page 280 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is the result of a Special Issue published in Applied Sciences, entitled “New Trends in Recycled Aggregate Concrete". It identifies emerging research areas within the field of recycled aggregate concrete and contributes to the increased use of this eco-efficient material. Its contents are organised in the following sections: Upscaling the use of recycled aggregate concrete in structural design; Large scale applications of recycled aggregate concrete; Long-term behaviour of recycled aggregate concrete; Performance of recycled aggregate concrete in very aggressive environments; Reliability of recycled aggregate concrete structures; Life cycle assessment of recycled aggregate concrete; New applications of recycled aggregate concrete.
Book Synopsis Handbook of Sustainable Concrete and Industrial Waste Management by : Francesco Colangelo
Download or read book Handbook of Sustainable Concrete and Industrial Waste Management written by Francesco Colangelo and published by Woodhead Publishing. This book was released on 2021-12-01 with total page 730 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Handbook of Sustainable Concrete and Industrial Waste Management summarizes key research trends in recycling and reusing concrete and industrial waste to reduce their environmental impact. This volume also includes important contributions in collaboration with the CRI-TEST Innovation Lab, Naples – Acerra. Part one discusses eco-friendly innovative cement and concrete and reviews key substitute materials. Part two analyzes the use of industrial waste as aggregates and the mechanical properties of concrete containing waste materials. Part three discusses differences between innovative binders, focusing on alkali-activated and geopolymer concrete. Part four provides a thorough overview of the life cycle assessment (LCA) of concrete containing industrial wastes and the impacts related to the logistics of wastes, the production of the concrete, and the management of industrial wastes. By providing research examples, case studies, and practical strategies, this book is a state-of-the-art reference for researchers working in construction materials, civil or structural engineering, and engineers working in the industry. Offers a systematic and comprehensive source of information on the latest developments in sustainable concrete; Analyzes different types of sustainable concrete and innovative binders from chemical, physical, and mechanical points of view; Includes real case studies showing application of the LCA methodology.
Book Synopsis The Structural Integrity of Recycled Aggregate Concrete Produced With Fillers and Pozzolans by : Paul O. Awoyera
Download or read book The Structural Integrity of Recycled Aggregate Concrete Produced With Fillers and Pozzolans written by Paul O. Awoyera and published by Woodhead Publishing. This book was released on 2021-12-01 with total page 499 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Structural Integrity of Recycled Aggregate Concrete Produced with Fillers and Pozzolans presents a review on the use of by-products, fillers and pozzolanic materials in the development of concrete, with an emphasis on structural integrity. The volume is broken down into key sections, including a review of the types of materials that are used as latent hydraulic supplements, fillers and pozzolans for making recycled aggregate concrete, rheology and hydration phenomenon, the mechanical and microscale nature of concrete, and the impact of fillers and pozzolans on the workability of concrete with case studies. Durability and strength development are also discussed. The final section looks at issues such as performance effect, LCA, environmental impact, sustainability and cost benefit analysis. With detailed case studies throughout, this volume will provide useful information for all stakeholders involved in the built environment, including materials scientists, civil engineers, builders, architects and policymakers. Identifies several potential by-products, fillers and pozzolans for the development of durable concrete Acts as a guidebook for constructors and researchers working in the broad field of material science, engineering and in-situ application Presents the durability properties of concrete made of by-products, fillers and pozzolans
Book Synopsis Fibre Reinforced Cementitious Composites, Second Edition by : Arnon Bentur
Download or read book Fibre Reinforced Cementitious Composites, Second Edition written by Arnon Bentur and published by CRC Press. This book was released on 2006-11-22 with total page 625 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advanced cementitious composites can be designed to have outstanding combinations of strength (five to ten times that of conventional concrete) and energy absorption capacity (up to 1000 times that of plain concrete). This second edition brings together in one volume the latest research developments in this rapidly expanding area. The book is split into two parts. The first part is concerned with the mechanics of fibre reinforced brittle matrices and the implications for cementitious systems. In the second part the authors describe the various types of fibre-cement composites, discussing production processes, mechanical and physical properties, durability and applications. Two new chapters have been added, covering fibre specification and structural applications. Fibre Reinforced Cementitious Composites will be of great interest to practitioners involved in modern concrete technology and will also be of use to academics, researchers and graduate students.
Book Synopsis Sustainability of Concrete With Synthetic and Recycled Aggregates by : Hosam Saleh
Download or read book Sustainability of Concrete With Synthetic and Recycled Aggregates written by Hosam Saleh and published by BoD – Books on Demand. This book was released on 2022-05-04 with total page 191 pages. Available in PDF, EPUB and Kindle. Book excerpt: Concrete is a material used widely in building and construction applications worldwide; hence, it plays a significant role in the global construction sector. Cement is a major component of concrete and is used in construction applications, either on its own or as a composite with other materials, to improve workability, durability, strength, weight, and shrinkage. However, cement and concrete production and use have adverse environmental effects. Thus, great efforts have been made to produce eco-friendly concrete. This book examines several aspects of sustainable concrete technologies, including new forms of concrete as well as different approaches for creating sustainable cement.
Book Synopsis USE OF RECYCLED CONCRETE IN CO by : Wing-Kun Fung
Download or read book USE OF RECYCLED CONCRETE IN CO written by Wing-Kun Fung and published by Open Dissertation Press. This book was released on 2017-01-27 with total page 282 pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation, "The Use of Recycled Concrete in Construction" by Wing-kun, Fung, 馮永根, was obtained from The University of Hong Kong (Pokfulam, Hong Kong) and is being sold pursuant to Creative Commons: Attribution 3.0 Hong Kong License. The content of this dissertation has not been altered in any way. We have altered the formatting in order to facilitate the ease of printing and reading of the dissertation. All rights not granted by the above license are retained by the author. Abstract: Abstract of thesis entitled The Use of Recycled Concrete in Construction submitted by W.K. Fung for the degree of Doctor of Philosophy at the University of Hong Kong January 2005 Large amounts of construction and demolition (C&D) material are being generated in Hong Kong, and disposal outlets are rapidly filling up. Recycling has been identified as a viable solution to these problems for the sustainable development of Hong Kong. There is already considerable experience in Europe and Japan in the recycling of old concrete into aggregates for use in new concrete. Based on the Rilem Specification (1994) and the German Guidelines (1998), the HKSAR Government has developed a specification for the use of recycled aggregates in concrete construction, with a maximum content of recycled coarse aggregates of 20% and the strength grade of concrete capped at C 35. Since the pilot recycling plant at Tuen Mun Area 38 commenced operation in July 2002, it has been producing high quality recycled aggregates with water absorption of between 3 and 7% and particle density between 2300 and 2600 kg/m3. Hence there is a case to revisit the existing specification, originally designed for recycled aggregates of lower quality. This study addresses the two main issues in Hong Kong. It considers whether the content of recycled aggregates can be raised without affecting the properties of the new concrete, and whether the requirement to thoroughly wet the recycled aggregates before use can be waived. While strength tests had been carried out to substantiate existing specifications, the durability aspects of the recycled concrete have not been systematically studied. In this study, concrete specimens containing 0%, 20%, 40% and 60% recycled coarse aggregates were prepared and tested for strength, retention of workability, elastic modulus, shrinkage, resistance to chloride penetration, initial surface absorption and carbonation. It was found that the properties of concretes containing different percentages of recycled aggregates did not differ much from those of the control mixes, provided that the effective water/cement ratio was kept constant. Another series of tests was carried out with recycled aggregates of lower quality. Based on the findings of this study, it is recommended that the maximum content of recycled coarse aggregates be raised to 50% for Grade 30 concrete and below, and to 30% for Grade 35 to Grade 45. Lower replacement levels are suggested for recycled aggregates of lower quality. For workability control, it is recommended that allowance for water absorption should be made in determining the amount of mixing water and that retarders and plasticisers should be used, subject to satisfactory trials. The study also addresses the economic and environmental aspects of recycling. At present, recycled aggregates cannot compete with natural aggregates, but this will change when the disposal charging scheme becomes effective in mid 2005. Confidence in the effectiveness of recycled aggregates remains a problem, however, and will only be overcome by more demonstration projects. (448 words) DOI: 10.5353/th_b3051764 Subjects: Aggregates (Building materials) - China - Hong Kong - Testing Waste products as building materials - China - Hong Kong
Book Synopsis Recycled Aggregate Concrete Structures by : Jianzhuang Xiao
Download or read book Recycled Aggregate Concrete Structures written by Jianzhuang Xiao and published by Springer. This book was released on 2017-11-13 with total page 670 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book describes how, given the global challenge of a shortage of natural resources in the 21st century, the recycling of waste concrete is one of the most important means of implementing sustainable construction development strategies. Firstly, the book presents key findings on the micro- and meso-structure of recycled aggregate concrete (RAC), while the second part focuses on the mechanical properties of RAC: the strength, elastic modulus, Poisson’s ratio, stress-strain curve, etc. The third part of the book explores research on the durability of RAC: carbonization, chloride penetration, shrinkage and creep. It then presents key information on the mechanical behavior and seismic performance of RAC elements and structures: beams, columns, slabs, beam-column joints, and frames. Lastly, the book puts forward design guidelines for recycled aggregate concrete structures. Taken as a whole, the research results – based on a series of investigations the author has condu cted on the mechanical properties, durability and structural performance of recycled aggregate concrete (RAC) over the past 10 years – demonstrate that, with proper design and construction, it is safe and feasible to utilize RAC structures in civil engineering applications. The book will greatly benefit researchers, postgraduates, and engineers in civil engineering with an interest in this field.
Book Synopsis Sustainable Fiber Reinforced Cementitious Composites for Construction and Building Materials by : Li Li
Download or read book Sustainable Fiber Reinforced Cementitious Composites for Construction and Building Materials written by Li Li and published by Frontiers Media SA. This book was released on 2023-07-26 with total page 199 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Recycling Concrete and Other Materials for Sustainable Development by : Tony C. Liu
Download or read book Recycling Concrete and Other Materials for Sustainable Development written by Tony C. Liu and published by . This book was released on 2004 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt:
