Hydraulic And Mechanical Properties Of Recycled Materials
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| Author | : Satish C. Gupta |
| Publisher | : |
| Total Pages | : 219 |
| Release | : 2009 |
| Genre | : Aggregates (Building materials) |
| ISBN | : |
Construction and maintenance of roads requires large volume of aggregates for use as base and subbase materials. Because of the cost of virgin aggregates, federal and state agencies are encouraging the recycling of waste materials including materials in old pavements. This study assessed the suitability of four recycled materials relative to virgin aggregates for use as base and subbase materials. The four recycled materials were the reclaimed asphalt pavement (RAP), fly ash (FA), reclaimed concrete material (RCM), and foundry sand (FS). Assessment of these materials was done in terms of their hydraulic, mechanical, and leaching properties when mixed in with various proportions of virgin aggregates. Except for slightly higher fine content in some RAP-aggregate mixtures, particle size distribution of all mixtures was within the Mn/DOT specification band for Class 5 materials. Water retention (pore size distribution), hydraulic conductivity, resilient modulus, and shear strength measurements were generally similar to that of 100% aggregates. Exception was the mixtures of FS. Heavy metal concentrations in the leachate were also generally less than the EPA drinking water standards. We concluded that FA, RAP, and RCM mixtures will be good substitutes of virgin aggregates as base and subbase materials.
| Author | : M. Yang |
| Publisher | : IOS Press |
| Total Pages | : 1428 |
| Release | : 2022-12-23 |
| Genre | : Technology & Engineering |
| ISBN | : 1643683551 |
Engineering technology is of crucial importance to the infrastructure on which modern societies depend, and keeping abreast of the latest research and developments in the field is of vital importance. This book presents the proceedings of HCET 2022, the 7th International Technical Conference on Frontiers of Hydraulic and Civil Engineering Technology, originally due to be held, in Sanya, China, from 25-27 September 2022, but instead held as a fully virtual event on Zoom due to continued uncertainty related to the Covid 19 pandemic. HCET is a platform for the dissemination of research results on the latest advances in the areas of hydraulic and civil engineering technology and environmental engineering, and provides an opportunity for scientists, researchers and engineers from around the world to exchange their findings, discuss developments, and possibly establish a basis for collaboration. A total of 275 submissions were received from international contributors, and all were subjected to a rigorous peer-review process, with each paper reviewed by a minimum of two experts. Papers were also checked for quality and plagiarism, after which, 163 papers were accepted for presentation and publication. Topics covered include the research and development of concrete structure design and analysis, structural mechanics and structural engineering, geological exploration and earthquake engineering, building technology, urban planning, energy, environment and advanced engineering science and applications. The book offers a state-of-the-art overview of recent developments, and will be of interest to all those working in the fields of hydraulic and civil engineering technology.
| Author | : |
| Publisher | : |
| Total Pages | : 0 |
| Release | : 2014 |
| Genre | : |
| ISBN | : |
The successful incorporation of recycled aggregates in pavement design is important for achieving a higher level of sustainability in our transportation network. However, recycled aggregates are non-soil materials and have different unsaturated hydraulic and resilient modulus characteristics. This study investigated the unsaturated hydraulic properties and impact of soil suction on resilient modulus for compacted recycled aggregates used as unbound base course, including recycled asphalt pavement (RAP), recycled concrete aggregate (RCA), and recycled pavement material (RPM). Hydraulic properties and relationships including the soil-water characteristic curve (SWCC) and saturated and unsaturated hydraulic conductivity were characterized using a hanging column test coupled with a large-scale testing cell. Regression of the hydraulic parameters from SWCC and unsaturated hydraulic conductivity; data for each type of recycled materials was completed. The effect of water repellency on hydraulic properties was evaluated. Development of testing equipment and procedures that incorporate the effect of soil suction during resilient modulus measurement is presented. A mathematical model to predict resilient modulus based on bulk stress, octahedral shear stress, and soil suction is proposed. In addition, empirical relationships for predicting summary resilient modulus (SRM) via soil suction and SRM at optimum compaction for recycled aggregates are presented. Measured SRM and SWCCs for different types of recycled aggregate were used to evaluate flexible pavement performance according to the approach outlined in the Mechanistic-Empirical Pavement Design Guide (M-EPDG). The impact of environmental effects (including freeze-thaw cycles and changes in temperature) on the resilient modulus of recycled aggregates and subsequent pavement performance are evaluated and presented in this dissertation.
| Author | : M. Yang |
| Publisher | : IOS Press |
| Total Pages | : 1528 |
| Release | : 2023-12-21 |
| Genre | : Technology & Engineering |
| ISBN | : 1643684655 |
All of us are dependent on a built environment constructed and maintained by civil and hydraulic engineers, and for those working in these fields, keeping up to date with the latest technological developments is vital for the safe and efficient design and operation of this infrastructure. This book presents the proceedings of HCET 2023, the 8th International Technical Conference on Frontiers of Hydraulic and Civil Engineering Technology, held from 25-27 September 2023 in Wuhan, China. HCET is an international conference which aims to enhance the development of hydraulic and civil engineering in China, with a focus on high-end, intelligent and green technologies. It seeks to do this by consolidating global wisdom and achievements and providing scientific support. HCET also offers an excellent opportunity for scientists, researchers and engineers from around the world to exchange their findings and discuss developments, establishing a basis for national and international collaboration. A total of 316 contributions were received for the 2023 edition, of which 187 were ultimately accepted after a rigorous review process and checks for quality and plagiarism. Topics covered include the research and development of concrete structure design and analysis; structural mechanics and structural engineering; building and future materials; hydraulic engineering; geological exploration and earthquake engineering; building technology; urban planning; road, bridge and traffic engineering; energy infrastructure; environmental engineering and advanced engineering technologies, and interdisciplinary sciences and applications. Covering a wide range of subjects related to hydraulic engineering and civil engineering technology and associated transdisciplinary sciences, the book will be of interest to all those working in the field.
| Author | : Nasser Khalili |
| Publisher | : CRC Press |
| Total Pages | : 1850 |
| Release | : 2014-06-05 |
| Genre | : Technology & Engineering |
| ISBN | : 1138001503 |
Unsaturated Soils: Research and Applications contains 247 papers presented at 6th International Conference on Unsaturated Soils (UNSAT2014, Sydney, Australia, 2-4 July 2014). The two volumes provide an overview of recent experimental and theoretical advances in a wide variety of topics related to unsaturated soil mechanics: - Unsaturated Soil Behavior - Experimentation - Modelling - Case Histories - Geotechnical Engineering Problems - Multidisciplinary and New Areas Unsaturated Soils: Research and Applications presents a wealth of information, and is of interest to researchers and practising engineers in soil mechanics and geotechnical engineering. These proceedings are dedicated to Professor Geoffrey E. Blight (1934-2013), who passed in November 2013.
| Author | : Ravindra K. Dhir OBE |
| Publisher | : Woodhead Publishing |
| Total Pages | : 652 |
| Release | : 2019-01-05 |
| Genre | : Architecture |
| ISBN | : 0081009917 |
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
| Author | : Vandana Subroy |
| Publisher | : |
| Total Pages | : 104 |
| Release | : 2013 |
| Genre | : Leachate |
| ISBN | : |
Leachate from ground wood stockpiled at recycling facilities may be detrimental to water quality. Although mathematical modeling of water movement through stockpiles may help estimate leachate quantity, information on water retention and unsaturated hydraulic conductivity of wood particles needed to run the models are unavailable. Our objectives were to (a) estimate the hydraulic properties of field stockpiled wood material, (b) assess performance of three models of pore structure in simulating water flow, and (c) determine relationships between optimized hydraulic parameters and particle size. The particle size distributions (PSDs) of thirty samples collected from stockpiles of coarsely and finely ground wood were measured, and their geometric mean diameters (dg) and distribution spreads (So) were used to establish two groups (I and II), with Group I samples having greater dg values for any given So than Group II samples. Six samples with PSDs representative of both groups were selected for hydraulic characterization. Material was packed in acrylic flow cells and outflow was induced by applying successive pressure potentials of -2, -10 and -40 cm to the bottom of the cells. Water retention data from outflow tests and from steady state measurements carried out in pressure extractors at potentials of -200, -500, -2000 and -10000 cm were fitted to unimodal and bimodal water retention functions. Inverse modeling of outflow data was performed using the software HYDRUS-1D and assuming (1) a unimodal pore-size distribution-SPM, (2) a bimodal pore-size distribution --DPM, (3) two distinct and interacting pore domains each with their own water retention and hydraulic conductivity functions-DPeM. Wood material released almost 50% of their total water at -2 cm with Group I samples releasing significantly higher volumes than Group II. All models of pore structure captured outflow dynamics. Statistical tests indicated that the DPeM followed by the SPM were the best models for conductivity and the DPM for water retention. Parameters of hydraulic models could be estimated from PSD data. Predictions by all models indicate that hydraulic conductivity of the unsaturated material is very low (around 0.09 cm/hr at -10 cm), suggesting that water would move slowly through stockpiles except during intense rainfalls.
| Author | : S. Hernández |
| Publisher | : WIT Press |
| Total Pages | : 260 |
| Release | : 2020-11-18 |
| Genre | : Technology & Engineering |
| ISBN | : 1784663891 |
Most high performance structures require the development of a generation of new materials, which can more easily resist a range of external stimuli or react in a non-conventional manner. Formed of research works presented at the 10th International Conference on High Performance and Optimum Design of Structures and Materials, the included papers cover issues involving advanced types of structures, particularly those based on new concepts or new materials and their system design. Contributions highlight the latest developments in design, optimisation, manufacturing and experimentation. There is also a focus on the search for higher performance sustainable materials. Particular emphasis is placed on intelligent structures and materials as well as the application of computational methods for their modelling, control and management. Optimisation problems are also covered, including those related to the size, shape and topology of structures and materials. Optimisation techniques have much to offer to those involved in the design of new industrial products. The development of new algorithms and the appearance of powerful commercial computer codes with easy to use graphical interfaces has created a fertile field for the incorporation of optimisation in the design process in all engineering disciplines.
| Author | : |
| Publisher | : Elsevier |
| Total Pages | : 4238 |
| Release | : 2020-01-09 |
| Genre | : Reference |
| ISBN | : 0128131969 |
Encyclopedia of Renewable and Sustainable Materials, Five Volume Set provides a comprehensive overview, covering research and development on all aspects of renewable, recyclable and sustainable materials. The use of renewable and sustainable materials in building construction, the automotive sector, energy, textiles and others can create markets for agricultural products and additional revenue streams for farmers, as well as significantly reduce carbon dioxide (CO2) emissions, manufacturing energy requirements, manufacturing costs and waste. This book provides researchers, students and professionals in materials science and engineering with tactics and information as they face increasingly complex challenges around the development, selection and use of construction and manufacturing materials. Covers a broad range of topics not available elsewhere in one resource Arranged thematically for ease of navigation Discusses key features on processing, use, application and the environmental benefits of renewable and sustainable materials Contains a special focus on sustainability that will lead to the reduction of carbon emissions and enhance protection of the natural environment with regard to sustainable materials
| Author | : Bibhuti Bhusan Das |
| Publisher | : Springer |
| Total Pages | : 906 |
| Release | : 2018-12-30 |
| Genre | : Technology & Engineering |
| ISBN | : 9811333173 |
This book presents select proceedings of the International Conference on Sustainable Construction and Building Materials (ICSCBM 2018), and examines a range of durable, energy-efficient, and next-generation construction and building materials produced from industrial wastes and byproducts. The topics covered include alternative, eco-friendly construction and building materials, next-generation concretes, energy efficiency in construction, and sustainability in construction project management. The book also discusses various properties and performance attributes of modern-age concretes including their durability, workability, and carbon footprint. As such, it offers a valuable reference for beginners, researchers, and professionals interested in sustainable construction and allied fields.
