Leaching Characteristics Of Recycled Concrete Aggregate Used As Highway Base
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| Author | : Janile Olivia Lewis |
| Publisher | : |
| Total Pages | : 186 |
| Release | : 2014 |
| Genre | : Leaching |
| ISBN | : |
The environmental suitability of seven different Recycled Concrete Aggregates (RCAs) was studied. Four different laboratory leaching tests were conducted: Water Leach Test (WLT), Synthetic Precipitation Leaching Procedure (SPLP), Toxicity Characteristic Leaching Procedure (TCLP) and pH-dependent leaching tests. The leaching behavior of Ca, Cr, Cu, Fe, and Zn from RCAs was investigated due to the following effects: pH, curing time, freeze/thaw cycles, liquid-to-solid ratio, particle size, and atmospheric exposure. In pH-dependent leaching tests, Ca showed cationic leaching patterns, while Cr, Cu, Zn, and Fe showed amphoteric leaching patterns. Tests results indicated that leached Zn concentrations were below the detection limits at pH>5. Increasing curing time caused soil aggregation and generally yielded a decrease in pH and concentration s of elements. Freezing and thawing of RCA led to self-cementing and decreased pH, Ca, Cu and Fe concentrations, while causing Cr concentrations to increase slightly. Increasing the liquid-to-solid ratio decreased leaching of elements significantly due to the dilution of leached elements in the aqueous solutions. Exposure to atmosphere increased carbonation of the RCA material and decreased pH, Ca, and Cu, and increased Cr and Fe. Furthermore, it was determined that there were significant differences in the leached concentrations of elements measured in three different laboratory tests, i.e. [CTCLP>CWLT>CSPLP]. Leached concentrations of Ca, Cu, Cr, Fe, and Zn were mostly below the Environmental Protection Agency Maximum Contaminant Levels (EPS MCLs), indicating that the use of these RCAs as sub-based layers in highway is environmentally friendly.
| Author | : Paul David Chasco |
| Publisher | : |
| Total Pages | : 210 |
| Release | : 1997 |
| Genre | : Leaching |
| ISBN | : |
| Author | : F Pacheco Torgal |
| Publisher | : Woodhead Publishing |
| Total Pages | : 594 |
| Release | : 2020-02-10 |
| Genre | : Technology & Engineering |
| ISBN | : 0128190566 |
Advances in Construction and Demolition Waste Recycling: Management, Processing and Environmental Assessment is divided over three parts. Part One focuses on the management of construction and demolition waste, including estimation of quantities and the use of BIM and GIS tools. Part Two reviews the processing of recycled aggregates, along with the performance of concrete mixtures using different types of recycled aggregates. Part Three looks at the environmental assessment of non-hazardous waste. This book will be a standard reference for civil engineers, structural engineers, architects and academic researchers working in the field of construction and demolition waste. Summarizes key recent research in recycling and reusing concrete and demolition waste to reduce environmental impacts Considers techniques for managing construction and demolition waste, including waste management plans, ways of estimating levels of waste, and the types and optimal location of waste recycling plants Reviews key steps in handling construction and demolition waste
| Author | : Philip Thomas Sherwood |
| Publisher | : Thomas Telford |
| Total Pages | : 184 |
| Release | : 2001 |
| Genre | : Technology & Engineering |
| ISBN | : 9780727730312 |
With the landfill tax and the introduction of a tax on the use of primary aggregates, increasing financial pressure is now being exerted on highway engineers to provide the most economic alternatives to naturally-occurring roadmaking materials. Alternative materials in road construction: Second edition, provides practical guidance in the selection of substitute materials, including the economic and technical considerations of their use and advice on the benefits and pitfalls of each material. This fully revised second edition includes: Extensively re-written and updated sections on classification and sources Specifications of road making materials and environmental and economic considerations Enlarged sections on construction and demolition wastes to take account of the increasing concern at the depletion of natural resources and the much greater emphasis on recycling A new chapter on Government and EC Policy with respect to environmental damage and recycling Alternative materials in road construction: Second edition is divided into three parts. Part 1 discusses the demand and requirements of road making materials and the specifications that they have to meet if they are to give sa
| Author | : Richard P. Floyd |
| Publisher | : |
| Total Pages | : 60 |
| Release | : 1979 |
| Genre | : Bench-marks |
| ISBN | : |
| 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.
| 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 | : Francois de Larrard |
| Publisher | : CRC Press |
| Total Pages | : 636 |
| Release | : 2019-03-04 |
| Genre | : Technology & Engineering |
| ISBN | : 1351052810 |
François de Larrard is Scientific Director of the R&D centre of the LafargeHolcim group and Scientific Director of the French national project Recybéton. He formerly spent almost thirty years at IFSTTAR (formerly LCPC). He has been granted both the Robert l'Hermite medal and the G.H. Tattersall award by RILEM, and is author of two books, including Concrete Mixture-Proportioning which is also published by Taylor & Francis.
| Author | : Myer Kutz |
| Publisher | : John Wiley & Sons |
| Total Pages | : 767 |
| Release | : 2018-07-25 |
| Genre | : Technology & Engineering |
| ISBN | : 1119304407 |
A comprehensive guide for both fundamentals and real-world applications of environmental engineering Written by noted experts, Handbook of Environmental Engineering offers a comprehensive guide to environmental engineers who desire to contribute to mitigating problems, such as flooding, caused by extreme weather events, protecting populations in coastal areas threatened by rising sea levels, reducing illnesses caused by polluted air, soil, and water from improperly regulated industrial and transportation activities, promoting the safety of the food supply. Contributors not only cover such timely environmental topics related to soils, water, and air, minimizing pollution created by industrial plants and processes, and managing wastewater, hazardous, solid, and other industrial wastes, but also treat such vital topics as porous pavement design, aerosol measurements, noise pollution control, and industrial waste auditing. This important handbook: Enables environmental engineers to treat problems in systematic ways Discusses climate issues in ways useful for environmental engineers Covers up-to-date measurement techniques important in environmental engineering Reviews current developments in environmental law for environmental engineers Includes information on water quality and wastewater engineering Informs environmental engineers about methods of dealing with industrial and municipal waste, including hazardous waste Designed for use by practitioners, students, and researchers, Handbook of Environmental Engineering contains the most recent information to enable a clear understanding of major environmental issues.
| Author | : Ozlem Bozyurt |
| Publisher | : |
| Total Pages | : 300 |
| Release | : 2011 |
| Genre | : |
| ISBN | : |
