Last edited by Fenririsar
Tuesday, August 11, 2020 | History

3 edition of Performance-related tests of recycled aggregates for use in unbound pavement layers found in the catalog.

Performance-related tests of recycled aggregates for use in unbound pavement layers

Athar Saeed

Performance-related tests of recycled aggregates for use in unbound pavement layers

by Athar Saeed

  • 370 Want to read
  • 30 Currently reading

Published by Transportation Research Board in Washington, D.C .
Written in English

    Subjects:
  • Pavements, Asphalt -- Recycling -- Testing,
  • Aggregates (Building materials) -- Testing,
  • Waste products as road materials -- Testing

  • Edition Notes

    StatementAthar Saeed.
    SeriesNCHRP report -- 598, Report (National Cooperative Highway Research Program) -- 598.
    ContributionsNational Research Council (U.S.). Transportation Research Board., National Cooperative Highway Research Program., American Association of State Highway and Transportation Officials.
    Classifications
    LC ClassificationsTE270 .S245 2008, TE7 .N25 no. 598
    The Physical Object
    Pagination53 p. :
    Number of Pages53
    ID Numbers
    Open LibraryOL23961592M
    ISBN 10030909920X
    ISBN 109780309099202
    LC Control Number2008900695

    Fine recycled aggregates are produced in large quantities when crushing Construction and Demolition Waste (C&DW). Even if coarse recycled aggregates are commonly used for road foundations, fine particles are often rejected as they are considered detrimental for the long-term behaviour of foundations. Physicochemical, mineralogical and mechanical characterizations (through X-ray diffraction, X 2 days ago  Aggregate ” is a collective term for the mineral materials such as sand, gravel and crushed stone that are used with a binding medium (such as water, bitumen, portland cement, lime, etc.) to form compound materials (such as asphalt concrete and portland cement concrete). By volume, aggregate generally accounts for 92 to 96 percent of HMA and about 70 to 80 percent of portland cement ://

      Project Appropriate Use of Waste and Recycled Materials in the Transportation Industry (an informational database is available on CRP-CD-5) Project Aggregate Tests Related to Performance of Unbound Pavement Layers (published as NCHRP Report )   Behiry also assessed the potential use of RCA in unbound pavement layers. In his study, conventional limestone aggregates were replaced by RCA at 25%, 50%, 75% and % by weight of the mix. In his study, conventional limestone aggregates were replaced by RCA at 25%, 50%, 75% and % by weight of the ://

    Water absorption properties of recycled materials play an important role in pavement performance. The performance of aggregates changes after absorbing water, then it affects highways layers such as base, subbase, capping. This is why these materials must comply requirements of codes and standards. With regard to the increasing trend of application of recycled aggregates in highways layers ?PaperID=   The mineral aggregate used in this investigation was crushed vesicular basalt with a nominal maximum size of mm. The CDW aggregate used was obtained by recycling waste from the demolition of concrete pavements, buildings and sidewalks and was composed of concrete and mortar (38%), mineral aggregate from different sources (43%), and plaster, ceramic and brick (19%), as


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Performance-related tests of recycled aggregates for use in unbound pavement layers by Athar Saeed Download PDF EPUB FB2

Under NCHRP Projectâ Tests of Recycled Aggregates for Use in Unbound Pave- ment Layers,â Applied Research Associates, Inc. was assigned the task of recommending procedures for performance-related testing and selection of recycled HMA and PCC mate- rials for use in unbound pavement ://   Performance-related Tests of Recycled Aggregates for Use in Unbound Pavement Layers on *FREE* shipping on qualifying offers.

Performance-related Tests of Recycled Aggregates for Use in Unbound Pavement Layers TRB's National Cooperative Highway Research Program (NCHRP) Report Performance-Related Tests of Recycled Aggregates for Use in Unbound Pavement Layers explores performance-related procedures to test and select recycled hot-mix asphalt and portland cement concrete materials for use in unbound layers of highway :// This report contains recommendations for performance-related procedures to test and select recycled hot-mix asphalt (HMA) and portland cement concrete (PCC) materials for use in unbound layers of highway pavements.

The report provides a comprehensive description of research intended to help materials engineers evaluate and select the reclaimed asphalt (RAP) and reclaimed concrete pavement Performance-Related Tests of Recycled Aggregates for Use in Unbound Pavement Layers.

This report contains recommendations for performance-related procedures to test and select recycled hot-mix asphalt (HMA) and portland cement concrete (PCC) materials for use in unbound layers ?id= This report presents recommended performance-based tests for aggregates for unbound pavement layers in both flexible and rigid pavements.

Test protocols for new tests are also provided. These tests will help state departments of transportation evaluate and select the aggregates that should contribute to good performing unbound aggregate :// Get this from a library.

Performance-related tests of recycled aggregates for use in unbound pavement layers. [Athar Saeed; National Research Council (U.S.). Transportation Research Board.; National Cooperative Highway Research Program.; American Association of State Highway and Transportation Officials.] -- Explores performance-related procedures to test and select recycled hot-mix asphalt TRB’s National Cooperative Highway Research Program (NCHRP) Report Performance-Related Tests of Recycled Aggregates for Use in Unbound Pavement Layers 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 Reportwhich cover TRB’s National Cooperative Highway Research Program (NCHRP) Web-Only Document contains appendixes A through C of NCHRP Report 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 Additional Physical Format: Online version: Saeed, Athar, Performance-related tests of aggregates for use in unbound pavement layers.

Washington, D.C.: National Academy Press, NCHRP Report"Performance-Related tests of Recycled Aggregates for Use in Unbound Pavement Layers," documents the work performed under this project; copies have been distributed to Program sponsors (i.e., state departments of transportation).?ProjectID=   Project Appropriate Use of Waste and Recycled Materials in the Transportation Industry (an informational database is available on CRP-CD-5) Project Aggregate Tests Related to Performance of Unbound Pavement Layers (published as NCHRP Report ) /08/NCHRP-Research-on-Materials-Pavementspdf.

For recycled aggregates in unbound pavement layers, NCHRP Report () in conjunction with AASHTO proposed a set of recommendations, for defining the performance-related tests.

The objective of the research study in the NCHRP Report was to develop a process for selecting recycled hot-mix asphalt (HMA)   Spreading an unbound aggregate base layer. Aggregate base layers are regularly used in both asphalt and PCC pavements and serve a variety of functions. Since subgrade soils may be soft and unstable, an aggregate base often helps ensure the stability of the pavement :// Use of recycled concrete aggregates (RCA) as a pavement material is one of the most sustainable engineering applications for the pavement industry.

Investigation on the performance characteristics of RCA, such as elastic and plastic deformations of RCA is therefore, needed to assess RCA's application as an unbound pavement material.

In this study, repeated load tri-axial (RLT) tests were (19) Recycled aggregates from solid waste can be used on pavements to minimize road construction costs and decrease environmental impacts related to the exploitation of natural resources and pollution.

Thus, this study aimed to compare the mechanical performance of mixtures composed of natural aggregates, concrete recycled aggregates and polyethylene terephthalate (PET) flakes (in proportions from   be made of crushed concrete, aggregates from unbound layers, masonry and asphalt.

The composition of the recycled aggregates from construction and demolition waste should be assessed according to the procedure laid out in EN For unbound layers, recycled aggregates covered by specification LNEC E are grouped into two classes: B and The specifications in everyday use are of a prescriptive nature based around a particle size distribution envelope.

Unbound aggregates are generally only utilized in the foundation levels of the road pavement. The role of performance tests is discussed together with the current status of a British Standard for unbound :// The use of RCA and MRA in pavement layers has been analysed in several studies.

Molenaar and Nierkerk [] studied the behaviour (e.g., gradation, composition, etc.) of unbound base course materials generated from recycled concrete and masonry results demonstrated that, due to the good quality of these materials, they could be applied in road :// National Cooperative Highway Research Program (NCHRP) () Performance-related tests of recycled aggregates for use in unbound pavement layers, NCHRP reportProjectISSNISBN:Research sponsored by the AASHTO in cooperation with the FHWA, Pavement Design, Management, and Performance—Materials and Construction, Transportation.

Recycled asphalt pavements (RAP) and recycled concrete pavements (RCP) were evaluated for use as an unbound base/subbase material. The objective was to recommend procedures for performance-related testing and selection of recycled hot-mix asphalt (HMA) and Portland cement concrete (PCC) materials for use as aggregates in unbound pavement layers, singularly or in combination with other ()  Use of recycled concrete aggregates (RCA) as a pavement material is one of the most sustainable engineering applications for the pavement industry.

Investigation on the performance characteristics of RCA, such as elastic and plastic deformations of RCA is therefore, needed to assess RCA's application as an unbound pavement ://The use of CDW, such as recycled concrete aggregates (RCA) and reclaimed asphalt pavement (RAP), in pavement construction is a viable solution to preserve the consumption of natural aggregates (NA