Evaluation of Recycled Concrete OpenGraded Aggregate

Dr. Shenghua Wu, LEED AP

My research interests included sustainable transportation infrastructure, pavement material characterization, green asphalt technologies (e.g. warm mix asphalt), pavement design and modeling, nondestructive and advanced performance testing, recycled and reclaimed materials evaluation, pavement rehabilitation and maintenance, and smart and

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Standards for cement, aggregates, admixtures

EN 12620:2002 Aggregates for concrete. This standard specifies the properties of aggregates and fillers produced from natural, manufactured or recycled materials. It covers normal weight aggregates with a density greater than 200kg/m 3. BSI has produced a guidance

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Materials Exam 1 Flashcards | Quizlet

asphalt & concrete, underlying materials for foundations and pavements, erosion protection open graded aggregate. missing small aggregate sizes that block voids between larger aggregates, highly permeable, low stability evaluation of moisture susceptibilty. superpave mix design: selection of aggregates. must pass both source and

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EB204 - Subgrades and Subbases for Concrete Pavements

Recycled concrete aggregate (either from an existing concrete pavement or another source) produces good results in free-draining subbases; however, it should be noted that recycled aggregate subbase has a lower permeability, strength, and resistance to particle degradation than limestone or gravel subbases.

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Laboratory Evaluation of Recycled Concrete Aggregate and

Jul 25,  · This paper presents the assessment of blends of recycled clay masonry (RCM) with recycled concrete aggregate (RCA) for applications in pavements. The study reviewed materials from two South Australian suppliers with the proportion by dry mass of RCM being up to 30 % of the total aggregate mass.

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Evaluation of recycled concrete aggregates for their

The suitability of using recycled fine and coarse aggregates with Portland pozzolanic cement to make a sustainable and environmental friendly concrete mix design was also analyzed. No significant difference was observed in the compressive strength of various concrete mixes prepared by natural and recycled aggregates. However, only the tensile

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Materials and Products — Concrete

recycled steel and iron. • For more color options, choose recycled glass. Fines from post-consumer (bottle glass) or post-industrial processes (glass cullet) make good alternative coloring agents. • Use a 6-inch-thick layer of porous concrete with a minimum subbase of 4 inches of open graded aggregate. A thicker

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Laboratory Evaluation of the Performance of Recycled

produced by recycled brick aggregates has a lower quality than the concrete produced by natural stone aggregates. Furthermore, it was suggested to use the brick aggregate concrete in constructing the walls bearing low load or partitionwalls. AjdukiewizandKliszczewicz[14]investigatedtheeffect of recycled aggregate on high-resistance concretes

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Using Recycled Concrete in MDOT's Transportation

Crushed concrete aggregate (CCA) is granular material manufactured by removing, crushing, and processing old concrete for reuse as an aggregate source in new construction. Although the Michigan Department of Transportation (MDOT) has used CCA since the 1980s, issues in the performance of

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Concrete Aggregate 4R Mill

211.6T-14 Aggregate Suspension Mixture Proportioning Method, Part 1 212.3R-10 Report On Chemical Admixtures For Concrete, Part 1 213R-14 Guide For Structural Lightweight-Aggregate Concrete, Part 1 214R-11 Guide To Evaluation Of Strength Test Results Of Concrete, Part 1 214.4R-10 Guide For Obtaining Cores And Interpreting Compressive Strength

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Experimental study on strength behaviour of recycled

Mar 10,  · The concrete specimen with. 100% recycled coarse aggregate at 28 days of curing has the lowest tensile strength, which was only 1.952 N/mm2. It is around 38.81% drop when compared to control. concrete specimen. There is a drop in tensile strength of 10.66%, 18.18%, 24.76% and 34.79% for the concrete.

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Performance Evaluation of Open-Graded Epoxy Asphalt

Open-graded friction course (OGFC) is applied to pavement surfaces to increase driving safety under wet conditions, and recently, to reduce tire/pavement noise. The durability of OGFC, however, has been a concern since conventional OGFC mixes last typically less than ten years before major maintenance or rehabilitation is needed. This study investigates a new open-graded asphalt mixture that

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Mechanistic Evaluation of Saturated Bases under Concrete

Reclaimed Asphalt Pavement and Recycled Concrete Aggregate Blends in Pavement Subbases: Laboratory and Field Evaluation Journal of Materials in Civil Engineering May Recycled-Glass Blends in Pavement Base/Subbase Applications: Laboratory and Field Evaluation

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PDF DelDOT Road Design Manual

Open Graded Mix⎯A special mix, con-taining aggregate that resists polishing, placed on the surface course to drain surface water, improve skid resistance, and reduce hydroplaning. • Rigid Pavement⎯A pavement structure that distributes loads to the subgrade, having as one course a Portland cement concrete slab

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Application of polymer, silica-fume and crushed rubber in

Achieving a pervious concrete (PC) with appropriate physical and mechanical properties used in pavement have been strongly investigated through the use of different materials specifically from the global waste materials of the populated areas. Discarded tires and the rubber tire particles have been currently manufactured as the recycled waste materials.

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Recycled Concrete Aggregate – A Viable Aggregate Source

the future. Despite this trend, the availability of demolished concrete for use as recycled concrete aggregate (RCA) is increasing. Using this waste concrete as RCA conserves aggregate, reduces the impact on landfills, decreases energy consumption and can provide cost savings. However, there

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