Performance Related Tests Of Recycled Aggregates For Use In Unbound Pavement Layers

Author : Athar Saeed
Publisher : Transportation Research Board National Research
ISBN 13 :
Total Pages : 68 pages
Book Rating : 4.42/5 ( download)

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Download or read book Performance-related Tests of Recycled Aggregates for Use in Unbound Pavement Layers written by Athar Saeed and published by Transportation Research Board National Research. This book was released on 2008 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt: Explores performance-related procedures to test and select recycled hot-mix asphalt and portland cement concrete materials for use in unbound layers of highway pavements. Appendixes A through C of NCHRP Report 598, which cover the literature review and background information, new aggregate tests, and surface dielectric measurements, were published as NCHRP Web-Only Document 119.

Author : Athar Saeed
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.71/5 ( download)

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Download or read book Appendixes to NCHRP Report 598 written by Athar Saeed and published by . This book was released on 2007 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This document contains appendixes A through C of NCHRP Report 598, "Performance-Related Tests of Recycled Aggregates for Use in Unbound Pavement Layers." The appendixes cover the literature review and background information, new aggregate tests, and surface dielectric measurements associated with NCHRP Report 598.

Author : Athar Saeed
Publisher :
ISBN 13 :
Total Pages : 16 pages
Book Rating : 4.19/5 ( download)

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Download or read book Performance Related Tests on Recycled Materials for Sustainable Design of Pavement Systems written by Athar Saeed and published by . This book was released on 2011 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt: This paper provides recommendations for performance-related tests to select recycled materials to be used in pavement foundations (base/sub-base layers). The test protocol presented in this paper will help transportation agencies, pavement design engineers and construction industry professionals to mechanistically evaluate and select sources of recycled hot-mix asphalt and portland cement concrete materials and identify factors that contribute most to the longevity of layers using recycled pavement materials. Extensive literature review was conducted on the aggregate specifications in the United States and other countries to identify the protocols used to evaluate the suitability of virgin and recycled aggregates in base and sub-base layers. The test procedures, typically designed for virgin aggregates, were modified to account for the recycled materials in the aggregate mix. The test procedures were further evaluated on the basis of mechanical performance, accuracy, practicality, complexity, precision, and test cost. The performance of the developed aggregate evaluation systems was determined through testing and analysis of 12 aggregates with different lithology and known field performance history. These samples were selected from seven states with different seasonal frost cycles. The performance tests were conducted and modifications were made to the tests procedures to better understand the mechanical behavior of aggregate systems with recycled materials. This study revealed that shear strength, toughness, abrasion, durability, and frost susceptibility influence the performance of the unbound aggregate layers. Statistical analysis of the data showed that shear strength of the aggregate systems has the most impact on the performance of the unbound systems consisted of recycled materials.

Author : Athar Saeed
Publisher :
ISBN 13 :
Total Pages : 68 pages
Book Rating : 4.45/5 ( download)

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Download or read book Performance-related Tests of Aggregates for Use in Unbound Pavement Layers written by Athar Saeed and published by . This book was released on 2001 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Author : Athar Saeed
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.55/5 ( download)

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Download or read book Tests of Recycled Aggregates for Use in Unbound Pavement Layers written by Athar Saeed and published by . This book was released on 2006 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Author : Ravindra K. Dhir OBE
Publisher : Woodhead Publishing
ISBN 13 : 0081009917
Total Pages : 652 pages
Book Rating : 4.18/5 ( download)

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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

Author : Hosam M. Saleh
Publisher : BoD – Books on Demand
ISBN 13 : 1837680116
Total Pages : 146 pages
Book Rating : 4.15/5 ( download)

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Download or read book Recycling Strategy and Challenges Associated with Waste Management Towards Sustaining the World written by Hosam M. Saleh and published by BoD – Books on Demand. This book was released on 2023-02-22 with total page 146 pages. Available in PDF, EPUB and Kindle. Book excerpt: Recycling is an act of collecting and processing items that would otherwise be discarded as waste in order to create a new product. Recycled material is being used in an increasing number of today’s products. Waste management is primarily concerned with a wide range of wastes, including industrial, biological, household, municipal, organic, biomedical, and radioactive wastes. Human activity, such as the mining and processing of basic resources, generates waste and poses health problems that can emerge both indirectly and directly. Waste mismanagement is a serious problem on an individual and a governmental level. Nowadays, the waste disposal business is struggling to adapt to globalized consumerism, a system in which things are manufactured on one continent, purchased and used on another, and disposed of on yet another. Therefore, remediation is often subject to a variety of legal criteria, but it can also be based on evaluations of human health and environmental concerns in cases where no statutory standards exist or when standards are advisory. This book discusses recycling strategies and technologies to find solutions to waste management. Chapters address such topics as biodegradable waste, the circular economy, managing industrial and nuclear waste, and much more.

Author : Vahid Ayan
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.89/5 ( download)

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Download or read book Assessment of Recycled Aggregates for Use in Unbound Subbase of Highway Pavement written by Vahid Ayan and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Intendancy for sustainability has made it necessary for the highways industry to adapt its traditional processes to more cost-effective, energy efficient and greener technologies. This research programme was developed with a key aim of investigating the technical viability of aggregates formed with different combinations of Recycled Concrete Aggregate (RCA), Reclaimed Asphalt Pavement (RAP) and Natural Aggregates (NA) when used in construction of unbound subbases of highway pavements. As strongly evident from a comprehensive literature review carried out, little information is available on the application of RCA and RCA/RAP as subbase materials. The suitability of RCA blended with RAP and NA were investigated and compared to the British Standards, Highway Agency specifications and the AASHTO standards requirements for highway design. Having established their suitability for highway design, then the performance of the materials was assessed under traffic loading. In compliance with the requirements of the above Standards/Specifications the in-situ loaded behavior of the aforementioned materials were also investigated. This was achieved through numerical analysis of a typical pavement structures comprising subbases made of the above materials. As a consequence, a series of analyses were carried out using KENLAYER TM computer program to model the stresses and deformations in the subbases. The results of the analyses were then applied to the Mohr Coulomb failure model in order to predict the factor of safety against failure of the subbase layer. Amongst the salient findings from the research was that most of the materials tested complied with the standard requirements. From a large number of tests carried out on materials collected in the UK and Iran, it was also demonstrated that the source of a recycled material and the method of extraction had a significant influence on the engineering properties of the material, especially the CBR. In terms of compaction and CBR requirements, the 50%RAP+50%RCA mix was demonstrated as suitable for unbound subbase application. Also, the presence of RAP in the mixes of RAP/RCA was found to improve the drainage properties of an unbound subbase layer. From the viewpoint of durability and frost susceptibility, it was verified that all the materials investigated were applicable to the highest significance level (as defined by AASHTO). However, based on stiffness considerations, the materials were found to be applicable only to the lowest significance level. Now, turning to the toughness and shear strength properties, the same materials were found to fall in the middle significance levels. The results of KENLAYER TM modeling indicated that the safety factor against failure of the mixes containing RAP and RCA decreased as the stiffness decreased. Evidently the research is likely to have a number of implications on the design and construction of highways. Firstly, the demonstrated viability of mixes containing recycled materials (RCA+RAP) can lead to significant cost savings, reduced CO2 emissions, reduced exploitation of virgin materials and minimization of dumping of civil engineering waste. If embraced in industry, the suggested use of recycled materials can help support National and international targets regarding sustainability, environmental and energy conservation. The research succeeded in cataloguing the specifications of RCA/RAP and RCA/NA for practical works, followed by development and evaluation of different mixes of recycled aggregates obtained from different sources. Detailed assessment based on compliance with requirements, performance prediction and modeling was completed.

Author : E. Tutumluer
Publisher :
ISBN 13 :
Total Pages : 180 pages
Book Rating : 4.90/5 ( download)

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Download or read book Practices for Unbound Aggregate Pavement Layers written by E. Tutumluer and published by . This book was released on 2013 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt: "TRB's National Cooperative Highway Research Program (NCHRP) Synthesis 445: Practices for Unbound Aggregate Pavement Layers consolidates information on the state-of-the-art and state-of-the-practice of designing and constructing unbound aggregate pavement layers. The report summarizes effective practices related to material selection, design, and construction of unbound aggregate layers to potentially improve pavement performance and longevity."--Publisher website.

Author : National Stone, Sand & Gravel Association
Publisher :
ISBN 13 : 9780988995000
Total Pages : pages
Book Rating : 4.0X/5 ( download)

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Download or read book The Aggregates Handbook, Second Edition written by National Stone, Sand & Gravel Association and published by . This book was released on 2013-03-20 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: