Download or read book Shear Strength of Reinforced Concrete Beams Made with Recycled Coarse Aggregate written by Abdullah Mohsin Sagher and published by . This book was released on 2016 with total page 152 pages. Available in PDF, EPUB and Kindle. Book excerpt: "The Bee‘ah‘s Waste Management Complex in the Emirate of Sharjah, UAE, has been producing aggregate from construction and demolition wastes for quite some time. However, such a product has not been utilized in structural applications. This research focuses on the concrete shear strength, which is a major component of the total shear resistance of reinforced concrete elements. Therefore, the objectives of this study are to investigate the behavior and develop design recommendations for the shear strength of reinforced concrete beams made with locally produced coarse aggregate. To do that, laboratory experiments on fifteen half-scale beams and associated theoretical predictive methods are utilized. The experimental part of the study addresses beams with different concrete compressive strengths, recycled coarse aggregate replacement percentages in the concrete mix, shear span-to-depth ratios and effective flexural steel reinforcement ratios. The experimental results are compared with corresponding findings from reinforced concrete beams employing natural aggregate. The theoretical part of the study considers available codified procedures for predicting the shear strength of concrete beams, such as the ACI 318 and CSA 23.3, as well as the strut-and-tie procedure, modified compression field theory and fracture mechanics approach. Results of the study showed that North American codes can adequately predict the shear strength provided by concrete when the shear span-to-depth ratio is large, but over-estimates it when the applied load is very close to the support. The strut-and-tie model predicted the shear strength of the tested beams much better than the other methods. The recycled concrete beams showed lower shear strength when the coarse aggregate replacement ratio was 50% and comparable shear strength when the replacement ratio was 100% than corresponding beams made with natural aggregate. The influence of concrete compressive strength on the shear capacity is much more predominant in the beams that were made with natural aggregate than those that were made with recycled aggregate. The effect of the flexural reinforcement ratio was not as significant in the beams made with concrete utilizing recycled aggregate as those made with natural aggregate. Until more tests on concrete beams made from different batches of recycled aggregate from Bee‘ah become available, a 30% reduction factor is suggested to be incorporated into the shear strength equations in the relevant codes."--Abstract.

Download or read book Building Code Requirements for Structural Concrete ACI 318 08 and Commentary written by ACI Committee 318 and published by American Concrete Institute. This book was released on 2008 with total page 471 pages. Available in PDF, EPUB and Kindle. Book excerpt: The quality and testing of materials used in construction are covered by reference to the appropriate ASTM standard specifications. Welding of reinforcement is covered by reference to the appropriate AWS standard. Uses of the Code include adoption by reference in general building codes, and earlier editions have been widely used in this manner. The Code is written in a format that allows such reference without change to its language. Therefore, background details or suggestions for carrying out the requirements or intent of the Code portion cannot be included. The Commentary is provided for this purpose. Some of the considerations of the committee in developing the Code portion are discussed within the Commentary, with emphasis given to the explanation of new or revised provisions. Much of the research data referenced in preparing the Code is cited for the user desiring to study individual questions in greater detail. Other documents that provide suggestions for carrying out the requirements of the Code are also cited.

Download or read book Shear Strength of Fiber Reinforced Recycled Aggregate Concrete written by Mohamed Ramadan Ghoneim and published by . This book was released on 2018 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt: "In this research, the shear strength of fiber reinforced recycled concrete was investigated. A High-strength Self Consolidated Concrete (SCC) matrix with 100% coarse recycled aggregate and different types/configurations of fibers were used in the study. Steel (3D and 5D), synthetic and hybrid fibers (mix of steel 5D and synthetic fibers) with a volume fraction of 0.75 % were added to the concrete matrix to prepare eight beams. In addition, four beams were prepared without fibers as control specimens. The aim of the experimental program is to evaluate the effect of: 1) recycled coarse aggregate replacement; 2) addition of fibers and 3) the steel fiber configuration on the shear strength of recycled aggregate concrete. The results show that recycled aggregate concrete resulted in an improvement in the average concrete shear strength of about 14.4% compared to that of the normal weight aggregate concrete. In addition, the fiber reinforced beams showed significant improvement in the average concrete shear capacity in the range of 23.44 – 64.48% when compared to that of the control specimen. The highest improvement was achieved by the 3D steel fiber beams. The addition of the fiber delayed the crack initiation, and improved the post-cracking and ductile behavior of all beams. Moreover, the experimental results were compared to that predicted by codes and proposed equations found in the literature for concrete strength with and without fiber. It was found that the ACI simplified equation predicts the closest results for both types of aggregates; while the fib model code 2010 equation predicted the most conservative results."--Abstract.

Download or read book Production Methods and Workability of Concrete written by P. J. M. Bartos and published by CRC Press. This book was released on 2019-11-25 with total page 560 pages. Available in PDF, EPUB and Kindle. Book excerpt: Practical production of ordinary and special, high performance concretes and their behaviour and properties when fresh are the main themes of this book. It derives from the International RILEM Conference held in Paisley, Scotland in June 1996, and represents the culmination of the work of two RILEM Technical Committees (145 WSM Workability of Special Mixes, and 150 ECM Efficiency of Concrete Mixers). Very significant advances have been made recently in the development of concrete with outstanding properties. Such advances in research must be matched by progress in the technology of concrete production. This book focuses on production methods and on workability and handling, two fundamental and closely linked stages of the concrete construction process. It has a strongly practical emphasis, with many contributions showing how to build effectively using the many high performance concretes which have progressed from research into construction in recent years. The main themes covered are: production mixers and mixing processes; production methods; sprayed and very dry precasting mixes; fibre reinforced concrete; flowing and superfluid mixes; rheology; test methods; mix design and models; special cements and concretes.

Download or read book Effect of Recycled Concrete Aggregate on the Behavior of Reinforced Concrete Beams written by Hatem Chamdine and published by . This book was released on 2016 with total page 55 pages. Available in PDF, EPUB and Kindle. Book excerpt:

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.

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.

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

Download or read book Effect of Recycled Concrete Aggregate on the Mechanical Properties of Concrete written by Tannous Touma and published by . This book was released on 2015 with total page 37 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Durability of Geosynthetics written by National Research Council (U.S.). Transportation Research Board and published by Transportation Research Board National Research. This book was released on 1994 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Sustainable Construction Materials written by Ravindra K. Dhir OBE and published by Woodhead Publishing. This book was released on 2019-01-05 with total page 652 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sustainable Construction Materials: Recycled Aggregate focuses on the massive systematic need that is necessary to encourage the uptake of recycled and secondary materials (RSM) in the construction industry. This book is the fifth and the last of the series on sustainable construction materials and like the previous four, it is also different to the norm. Its uniqueness lies in using the newly developed, Analytical Systemisation Method, in building the data-matrix sourced from 1413 publications, contributed by 2213 authors from 965 institutions in 67 countries, from 1977 to 2018, on the subject of recycled aggregate as a construction material, and systematically analysing, evaluating and modelling this information for use of the material as an aggregate concrete and mortar, geotechnics and road pavement applications. Environmental issues, case studies and standards are also discussed. The work establishes what is already known and can be used to further progress the use of sustainable construction materials. It can also help to avoid repetitive research and save valuable resources. The book is structured in an incisive and easy to digest manner and is particularly suited for researchers, academics, design engineers, specifiers, contractors, and government bodies dealing with construction works. - Provides an exhaustive and comprehensively organized list of globally-based published literature spanning 5000 references - Offers an analysis, evaluation, repackaging and modeling of existing knowledge that encourages more responsible use of waste materials - Provides a wealth of knowledge for use in many sectors relating to the construction profession, including academia, research, practice and adoption of RSM

Download or read book ACI 318 19 Building Code Requirements for Structural Concrete ACI 318 19 and Commentary ACI 318R 19 written by ACI Committee 318 and published by . This book was released on 2019-05 with total page 624 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Oil Palm Shell written by Mohammad Abdul Mannan and published by Nova Science Publishers. This book was released on 2017 with total page 332 pages. Available in PDF, EPUB and Kindle. Book excerpt: Author Biography: Dr. Mohammad Abdul Mannan was born at a simple family of a small village, Aktarpur, Rangiarpota, Jibonnagar, Chuadanga, Bangladesh. He has obtained B.Sc. (Civil Engineering) degree with first class, MSc in Civil Engineering and PhD in Concrete technology. He has started carrier as lecturer at BIT Rajshahi (now RUET), Bangladesh followed by AJP consulting firm, then Universiti Malaysia Sabah (UMS) and is now a Professor of Department of Civil Engineering, Universiti Malaysia Sarawak, Malaysia. He is the inventor of few construction products. Based on 30 years of experience in teaching, professional practice and research, his vision is to be excellence in research on Innovative Construction Material and Structure. Book Description: Due to a high demand in construction and furniture industries worldwide, natural resources such as stones and wood as non-renewable resources are being depleted. Thus, researchers are focusing on renewable resources as alternative materials. As such, the utilisation of abundant solid wastes and byproducts, which are discharged from agriculture, industry and municipalities present an alternative to the conventional materials for the construction and furniture industries. These solid wastes and byproducts, when properly processed have shown to be effective and can readily meet design specifications. Agricultural solid wastes from oil palm distributors such as Oil Palm Shell (OPS) and Empty Fruit Bunch (EFB), which are abundant in agro-based countries, present an interesting alternative to the conventional aggregate in lightweight concrete and artificial plank production, respectively. At present, palm oil producing countries are Barkina Faso, Benin, Burundi, Cameroon, Central African Republic, Colombia, Costa Rica, C�te d'Ivoire, Democratic Republic of Congo, Ecuador, Equatorial Guinea, Gabon, Gambia, Ghana, Guinea Bissau, Guinea, Honduras, India, Indonesia, Liberia, Malaysia, Mexico, Nigeria, Papua New Guinea, Peru, Republic of Congo, Senegal, Sierra Leone, Tanzania, Thailand, Togo, Uganda, Venezuela and others. In Malaysia, oil palm plantations cover over 5 million hectares, and annual production of OPS as solid waste from 450 oil palm mills is more than 6 million tons. This large amount of OPS as a renewable green aggregate can contribute to overcoming the over dependence on depletable resources for concrete production. The civil engineering projects are of a larger scale; they need sustainable materials in order to gain a greater momentum of growth. The major technical characteristics of OPS solid waste must be primarily understood before each particular use. Therefore, there is a need to highlight the importance of OPS to be used in the construction industry.

Download or read book PRO 40 International RILEM Conference on the Use of Recycled Materials in Buildings and Structures Volume 2 written by Enric Vázquez and published by RILEM Publications. This book was released on 2004 with total page 604 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Compressive Strength of Concrete written by Pavel Krivenko and published by BoD – Books on Demand. This book was released on 2020-03-11 with total page 166 pages. Available in PDF, EPUB and Kindle. Book excerpt: Concrete made using mineral cements, the raw materials which on earth are practically endless, is known as one of the oldest building materials and during the last decades of the twentieth century has become a dominant building material for general use. At the same time, the requirements of the quality of concrete and its performance properties, in particular compressive strength, durability, economical efficiency, and low negative impact of its manufacture on the environment have not yet been completely met. Bearing these requirements in mind, researchers and engineers worldwide are working on how to satisfy these requirements. This book has been written by researchers and experts in the field and provides the state of the art on recent progress achieved on the properties of concrete, including concrete in which industrial by-products are utilized. The book is dedicated to graduate students, researchers, and practicing engineers in related fields.

Download or read book Recycled Aggregates written by Ravindra K Dhir and published by ICE Publishing. This book was released on 2019-09-09 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book is an ideal source of information on the subject and would be a suitable addition to any library as a resource for researchers seeking to develop an overview of the research on this topic.

Download or read book Recycled Concrete written by Vivian W. Y. Tam and published by Woodhead Publishing. This book was released on 2022-11-11 with total page 388 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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