PennDOT RECYCLING MATERIAL BRIEF Recycled …
c00335 Recycled Concrete Shoulder Removed Subbase (No. 2A), Recycled Concrete Section Application 203 Embankment and Fill 221 MSE Walls 601 Sides of Trenches, Above Pipes, and Conduits 605 Endwalls, Inlets, Manholes, and Spring Boxes 738 Geogrids 1085 Precast Reinforced Concrete Box Culverts 1086 Sound Barriers ...
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Frontiers | Sustainable usage of demolished concrete waste …
1.1. C&D materials. The various types of C&D materials used are discussed below: 1.1.1. Use of demolished concrete. In the United States and European countries, the quantity of concrete demolished every year is about 50–60 million tons, respectively (Kawano, 2003; Robinson et al., 2004).At present, only a very meager quantity of …
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(PDF) Geotechnical Properties of Recycled …
Current research on ecofriendly construction fill materials primarily focuses on utilizing industrial by-products and construction and demolition (C&D) waste, such as biosolids [43], recycled ...
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Physical properties and shear strength responses of recycled
This paper investigates the physical and shear strength characteristics of six common C&D materials and assesses the viability of using these C&D materials in pavement base/subbase applications. The six recycled C&D materials studied were recycled concrete aggregate (RCA), crushed brick (CB), reclaimed asphalt pavement …
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Granular subbase improvement with recycled concrete …
Use of Recycled Concrete Aggregate (RCA) for Granular Subbase (GSB) in the tropical area is evaluated in this work. Among the materials widely studied as replacements in granular and surface layers is RCA. Its mechanical behavior in granular layers has mainly been evaluated with tests such as California Bearing Ratio (CBR). However, abrasion is …
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Reclaimed Asphalt Pavement and Recycled Concrete …
Recycled concrete aggregate (RCA), on the other hand, has been widely accepted in pavement applications. The sustainable solution of blending RAP with RCA was …
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Characterization of compaction and CBR properties of recycled concrete …
Mechanical properties of recycled concrete aggregates (RCA) such as compaction and California bearing ratio (CBR) are important for application as unbound road base and subbase materials. Limited studies, however, have examined the effects of the nominal maximum particle diameter (Dmax) of aggregates and fines content (Fc; < …
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Feasible use of recycled concrete aggregates and crushed clay …
The subbase using crushed clay brick as the fine aggregate had a lower CBR value compared to the subbase using recycled concrete aggregate as the fine aggregate. 6. A 4-day soaked period had a negligible influence on …
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Sustainable Materials: A Review of Recycled Concrete …
In this paper, a comprehensive literature review was conducted on the utilization of recycled concrete aggregate (RCA), which is the dominant construction and demolition waste material, in base and subbase layers and its comparison with natural aggregate (NA).
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Utilization of recycled aggregates in cement-treated bases: a …
Recycled materials with suitable engineering properties can be used as substitutes for natural aggregates (NA), an economically feasible and environmentally …
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Reclaimed Concrete Material
U.S. Department of Transportation Federal Highway Administration 1200 New Jersey Avenue, SE Washington, DC 20590 202-366-4000
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Subgrade Soil Stabilization Using Low-Quality …
Recycled concrete aggregate (RCA) results from the recycling of Portland cement concrete pavements. The use of RCA as aggregates on paving projects, where quality aggregates are …
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Evaluation of recycled concrete aggregate in asphalt mixes
This paper investigates the feasibility of using recycled concrete aggregate (RCA) as a replacement to the natural aggregates (NAs) in hot mix asphalt (HMA). RCA was collected from two different sources (new concrete cubes used for quality control testing during construction, and old demolished building) to investigate the impact of …
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Reclaimed Asphalt Pavement and Recycled Concrete …
AbstractIn recent years, efforts have been made to incorporate reclaimed asphalt pavement (RAP) into pavement base or subbase applications by means of cement binder stabilization. This approach, however, may not be an environmentally friendly solution due ...
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Tech Brief for RCA in Dense Graded Aggregate
Sample recycled concrete aggregate (RCA) from three different NJDOT approved sources and conduct permeability and California Bearing Ratio testing; Need a solution? Think Jersey DOT "Turnin g Problems into Solutions " The Use of Recycled Concrete Aggregate in a Dense Graded Aggregate Base Course FHWA-NJ-2008-002 April 2009
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Effect of self-cementing properties on the mechanical …
Introduction. In Europe, over 800 million tonnes of construction and demolition wastes (CDW) are produced each year [11], with concrete wastes representing up to 75 % of total CDW by weight [30].To achieve a sustainable development of pavement construction, recycling and reuse of concrete wastes into pavement base and …
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Recycled Concrete Aggregate Federal Highway …
Concrete is routinely being recycled into the highway environment in the United States. The principal application of recycled concrete aggregate in the United States has been as a base material; The utilization of recycled concrete aggregate as aggregate in hot mix asphalt (HMA) and concrete is not as widely accepted in the United States.
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Mechanical properties of polypropylene fibre reinforced recycled …
Recycled C&D materials, such as recycled concrete, recycled rock, recycled brick, reclaimed asphalt, and recycled glass, are increasingly being assessed for their suitability in various civil engineering applications, such as roads, pavements, footpaths and concretes [9], [10], [11].Incorporating these reclaimed materials into civil …
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Concrete Pavement Recycling
• When RCA is to be used in a subbase layer of the roadway and/or shoulders, production can be accomplished using an in-place concrete recycling train. 3. ... • 3.4M tons of recycled concrete aggregate used in base • Material cost savings from RCA: $20,530,000 • Avoided hauling cost (@$7.50/ton): $25,500,00
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Thermogravimetric analysis (TGA) for characterization of self
Recently, it is found that, sometimes, the strength and stiffness of the unbound pavement base and subbase layers, built with recycled concrete aggregates (RCA), increase with time, known as self-cementing properties of RCA [7], [8], [9].This is believed to be caused by the hydration of unhydrated cement in RCA, which is released …
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3138 AGGREGATE FOR SURFACE AND BASE COURSES …
(CG) = Concrete and Glass, (BCG) = Bituminous, Concrete, and Glass £ Recycled concrete is only allowed for shoulders β Class 2 must be composed of crushed quarry rock per 3138.2.B.2. Table 3138-4 Base and Surfacing Aggregate (containing 25% or more recycled aggregates & 75% or less recycled concrete) Total Percent Passing …
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Sustainable Materials: A Review of Recycled Concrete …
In this paper, a comprehensive literature review was conducted on the utilization of recycled concrete aggregate (RCA), which is the dominant construction …
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THE USE OF RECYCLED CONCRETE AS A SUBBASE LAYER FOR HIGHWAYS …
This paper focuses on using recycled concrete as a subbase material for highways. Concrete cubes produced from concrete tests such as compression strength, have been crushed to produce different ...
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Best Fill Under Concrete Slabs
Guide to subgrades and subbases, which support concrete slabs. Info on how to properly compact the subgrade and gravel base before placing concrete. ... silt, or organic materials. Manufactured aggregate works …
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Geotechnical Properties of Recycled Concrete
This paper presents a laboratory investigation of the geotechnical properties of recycled concrete aggregate (RCA). The properties of RCA were compared with state road authority requirements to assess its performance as a pavement sub-base material. The experimental programme included tests such as particle size distribution, modified …
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Evaluation of cement-treated recycled concrete aggregates …
The findings of this study can be helpful for the design of cement-treated RCA base/subbase layers and enhance the confidence of highway designers and road contractors to employ RCA in field applications. 2. ... The selection of cement contents equal to 2–7 % to treat recycled concrete aggregates is based on the used strength …
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Bases and Subbases for Concrete Pavement
Base thicknesses in the range of 4 to 6 inches are most common. Bases are typically extended 3 to 4 feet beyond the edge of pavement to accommodate the tracks of the …
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The Effect of Waste Clay Brick Content on Performance of Cement …
This paper evaluated the effect of WCB content on the performance of cement-stabilized recycled concrete aggregate (RCA) in pavement base/subbase applications. Based on the microscopic tests and laboratory tests of the aggregate, the compaction test, unconfined compressive strength (UCS) test, indirect tensile strength …
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Potential use of reclaimed asphalt pavement and recycled concrete
RAP stabilised with cement binders has been reported toperform satisfactorily in pavement base and subbase layers [2], [3].The application of RAP and RCA in pavement base/subbase as an aggregate, however, has been limited due to the lack of reported laboratory testing and field-testing results [33].Most of the existing literature concludes …
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Determination of Gradation of Recycled Mixed Coarse …
Recycled concrete (RC) is relatively large, 2.416, and both the NCL26.5 and RC are smaller than the fractal dimension of recycled clay brick aggregates (RB), D = 2.656. It can be seen that the material strength has a significant effect on the fractal dimension, and the larger the aggregate strength is, the smaller the fractal dimension …
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