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ANALYSIS OF USING RECLAIMED ASPHALT PAVEMENT (RAP) AS A

19/10/2006 The Colorado Department of Transportation (CDOT) has used Reclaimed Asphalt Pavement (RAP) as a base on many projects as a reconstruction strategy. CDOT’s specifications allow RAP to be substituted for unbound aggregate base course (ABC). The laboratory tested properties of reclaimed asphalt pavement are similar to CDOT’s aggregate base course

EVALUATION OF USING RECLAIMED ASPHALT PAVEMENT (RAP)

02/12/2018 EVALUATION OF USING RECLAIMED ASPHALT PAVEMENT (RAP) AS UNBOUND BASE AGGREGATE LAYER Dec. 06, 2018 Burak Tanyu (Associate Professor at George Mason University) Saad Ullah (Graduate Research Assistant at GMU) Edward Hoppe (Associate Principal Research Scientist at VTRC) (Presented at the 2018 Virginia Asphalt Conference & Expo)

Analysis of Using Reclaimed Ashpalt Pavement (RAP) as a

Analysis of Using Reclaimed Ashpalt Pavement (RAP) as a Base Course Material. The Colorado Department of Transportation (CDOT) has used Reclaimed Asphalt Pavement (RAP) as a base on many projects as a reconstruction strategy. CDOT’s specifications allow RAP to be substituted for unbound aggregate base course (ABC). The laboratory tested properties of reclaimed asphalt pavement

Evaluation of reclaimed asphalt pavement as base/subbase

03/08/2020 The application of reclaimed asphalt pavement (RAP) has become a common practice in road construction as a substitute to natural aggregate. The significance of RAP amount on the resilient modulus behavior, shear strength and hydraulic conductivity characteristics of unbound granular base materials were investigated in this research.

(PDF) Utilizing Reclaimed Asphalt Pavement (RAP) Materials

Transportation agencies worldwide are incorporating reclaimed asphalt pavement (RAP) materials in new pavement designs. RAP was used for the first time in 1973, however, with low percentages due to...

Performance of Reclaimed Asphalt Pavement (RAP) as a

Reclaimed Asphalt Pavement (RAP) was used to replace fine aggregate in concrete at 0, 20, 40, 60, 80 and 100%. Workability, density and compressive strength were carried out on the specimens in line with specific standards. Based on the results obtained, RAP content of up to 40% was observed to be viable for both density reduction and compressive strength behavior. More research works are

AN OVERVIEW OF RECLAIMED ASPHALT PAVEMENT (RAP)

RECLAIMED ASPHALT PAVEMENT Introduction of reclaimed asphalt pavement In the report of Collins and Ciesielski (1994), RAP is a product of asphalt pavement removal and is the primary recycled material used in asphalt concrete. Milling machines break down the existing asphalt concrete pavement into discrete particles as shown in Figure 1 to

Laboratory Investigations on Reclaimed Asphalt Pavement

01/01/2017 The present study is to assess the suitability of using these redundant pavement materials also called Reclaimed Asphalt Pavement (RAP) as potential subbase / base course materials for flexible pavement. It was observed from literature survey of various past studies that California bearing ratio (CBR) of 100% RAP is not suitable for its use as base of flexible pavement as per Indian

Cement Stabilization of Reclaimed Asphalt Pavement

A pavement design analysis of using various cement stabilized RAP-virgin aggregate mixtures as base materials was also undertaken. Results indicate that the optimum moisture content, maximum dry density, and strength of RAP will generally increase with the addition of virgin aggregate and cement. Longer curing periods will yield higher strength results. The ability of RAP aggregate to function as a structural component of the pavement is more pronounced when it is stabilized with cement

Investigation of the Effect of Recycled Asphalt Pavement

R. Locander, Analysis of Using Reclaimed Asphalt Pavement (RAP) as a Base Course Material, vol. 66, Colorado Department of Transportation-Research, Denver, CO, USA, 2009. R. L. Mokwa and C. S. Peebles, “Strength, stiffness, and compressibility of RAP/aggregate blends,” Pavement Mechanics and Performance, vol. 154, pp. 247–255, 2008.

Evaluation of reclaimed asphalt pavement as

03/08/2020 Introduction. Reclaimed asphalt pavement (RAP) is the most available material with great potential to substitute natural resources. In Egypt, the removal of deteriorated pavement sections during milling, resurfacing, rehabilitation, or scraping processes produces about 4 million tons of RAP annually .Thus, the use of RAP as a construction material can decrease the cost, provides a way to

OPTIMIZING THE USE OF RECLAIMED ASPHALT PAVEMENT (RAP

The most common use of reclaimed asphalt pavement (RAP) is in the lower layers of a pavement structure, where it has been proven as a valid substitute for virgin materials. Instead, the use of RAP in surface mixes is more limited, with a major concern being that the high RAP mixes may not perform as well as traditional mixes. To reduce risks of compromised performance, the use of RAP has

Feasibility of Reclaimed Asphalt Pavement (RAP) Use As

Feasibility of Reclaimed Asphalt Pavement (RAP) Use As Road Base and Subbase Material. The purpose of this study was to investigate the current state of the practice with regard to the use of reclaimed asphalt pavement (RAP) material for road base and subbase applications and the potential for such use by the Virginia Department of Transportation (VDOT).

Gradation Analysis of Reclaimed Asphalt Pavement from

Reclaimed Asphalt Pavement (RAP) is the result of dredging material with aggregate gradation condition that are not in accordance with the needs of the gradation envelope. Utilization of RAP as a pavement layer is an effort to converse the use of natural materials. The efficiency aspect of RAP aggregate use needs to be done by determining the road pavement layer that is most appropriate to

BEHAVIOR OF CONCRETE WHEN USING RAP (RECLAIMED ASPHALT

a base and wearing coarse material. When the asphalt pavement reaches the end of its operational lifecycle, this material is removed from the pavement surface by the use of a rotor mill where the material that it produces is processed creating a product called reclaimed asphalt pavement (RAP). Current standards allow for the RAP to be included

Recent Development of Recycled Asphalt Pavement

20/02/2015 Recycled asphalt pavement (RAP) has increasingly been used as a base material for highway construction as a sustainable solution. Due to the existence of asphalt, 100 % RAP typically has low strength and high potential of creep and permanent deformations. RAP can be blended with virgin aggregate, stabilized by cement and fly ash, or confined by geocell to increase its strength and reduce

Cold Recycled Asphalt Mixture using 100% RAP with

The aim of this study is to evaluate the application of a cold recycled asphalt mix using 100% RAP with an emulsified asphalt-recycling agent as a new pavement base course. A trial section was built employing this material as a pavement base course in a heavy traffic highway in Brazil, and its structural behavior was monitored for 12 months using a Falling Weight Deflectometer (FWD) to assess

The Research of the Feasibility of Using Reclaimed

The research is to compound (1) the Reclaimed Asphalt Pavement (RAP) with the asphalt penetration less than 15 (25°C, 5sec, 100g) and the gravel aggregates of the base course adopted from the existing roads, and (2) the cement binder into Regenerated Low-Density Pervious Concrete (RLDPC) whose the compressive strength is between 25 to 50 (kgf/cm2) and whose permeable capacity (ml/15sec) is

Potential Carbon Footprint Reduction for Reclaimed Asphalt

benefits of warm-mix asphalt (WMA) technologies, which reduce the temperature by 20–30 degrees Celsius compared to hot-mix asphalt (HMA), and on the use of reclaimed asphalt pavement (RAP) in the base or binding layers [8,11–14], as well as a few on wearing or friction courses [13,15]. However, in none of the studies has RAP content exceeded

Recycling — Colorado Department of Transportation

Analysis of Using Reclaimed Asphalt Pavement (RAP) as a Base Course Material. Research Report 2009-5, Authors: Robert Locander, Keywords: Recycling, Reclaimed Asphalt Pavement . Best Practices for Full-Depth Reclamation Using Asphalt Emulsions. Research Report 2015-04, Author: Scott Shuler, Keywords: Recycling, Reclaimed Asphalt Pavement, Full-Depth Reclamation, Asphalt Emulsions, Asphalt

OPTIMIZING THE USE OF RECLAIMED ASPHALT PAVEMENT (RAP

The most common use of reclaimed asphalt pavement (RAP) is in the lower layers of a pavement structure, where it has been proven as a valid substitute for virgin materials. Instead, the use of RAP in surface mixes is more limited, with a major concern being that the high RAP mixes may not perform as well as traditional mixes. To reduce risks of compromised performance, the use of RAP has

Gradation Analysis of Reclaimed Asphalt Pavement from

Reclaimed Asphalt Pavement (RAP) is the result of dredging material with aggregate gradation condition that are not in accordance with the needs of the gradation envelope. Utilization of RAP as a pavement layer is an effort to converse the use of natural materials. The efficiency aspect of RAP aggregate use needs to be done by determining the road pavement layer that is most appropriate to

Evaluation of Current Practices of Reclaimed Asphalt

Evaluation of Current Practices of Reclaimed Asphalt Pavement/Virgin Aggregate As Base Course Material. Publication URL: Full Document (pdf 0.96 MB) Every year Hot Mix Asphalt (HMA) roadways are rehabilitated by milling the existing roadway and replacing the milled portion with new HMA. As a result of this practice, a tremendous amount of reclaimed asphalt pavement (RAP) is created. The

(PDF) RECLAIMED ASPHALT PAVEMENT A

INTRODUCTION Recycling hot mix asphalt (HMA) material results in a reusable mixture of aggregate and asphalt binder known as reclaimed asphalt pavement (RAP). Recycling of asphalt pavements is a valuable approach for technical, economical, and environmental reasons (Kennedy et al. 1998). Using RAP has been favored over virgin materials in the light of the increasing cost of asphalt, the

Environmental Impacts of Reclaimed Asphalt Pavement (RAP)

The primary goal of this study was to investigate the environmental impacts of reclaimed asphalt pavement (RAP) while it is freshly processed (i.e., fresh HMA) and after subjecting it to accelerated weathering. Three RAP materials were obtained from 3 plants throughout New Jersey; denoted as NORTHRAP, CENTRALRAP, and SOUTHRAP. In addition, a NJ supplier provided fresh HMA loose

Potential Carbon Footprint Reduction for Reclaimed Asphalt

benefits of warm-mix asphalt (WMA) technologies, which reduce the temperature by 20–30 degrees Celsius compared to hot-mix asphalt (HMA), and on the use of reclaimed asphalt pavement (RAP) in the base or binding layers [8,11–14], as well as a few on wearing or friction courses [13,15]. However, in none of the studies has RAP content exceeded

Recycling — Colorado Department of Transportation

Analysis of Using Reclaimed Asphalt Pavement (RAP) as a Base Course Material. Research Report 2009-5, Authors: Robert Locander, Keywords: Recycling, Reclaimed Asphalt Pavement . Best Practices for Full-Depth Reclamation Using Asphalt Emulsions. Research Report 2015-04, Author: Scott Shuler, Keywords: Recycling, Reclaimed Asphalt Pavement, Full-Depth Reclamation, Asphalt Emulsions, Asphalt

[PDF] Reclaimed Asphalt Pavement A Literature Review

While the state of Illinois has been recycling Reclaimed Asphalt Pavement (RAP) material into hot-mix asphalt (HMA) since 1980, there continues to be questions regarding the correct approach to design HMA with RAP. The Illinois Department of Transportation's current method of RAP HMA design provides 100% contribution for the residual asphalt binder from the RAP based on solvent extractions.

Improvement of fatigue and rutting performance with

18/09/2020 evaluate long-term field performance using stabilized base. It was found that it is cost-effective to use bases stabilized with Portland cement, geogrids, asphalt emulsions, or CaCl 2, over non-stabilized RAP base since the life cycle cost of the untreated RAP base section appeared to be the lowest of all the pavement sections analyzed

Cost–Benefit Analysis of RAP–Sand Blend Applications

Locander, R. Analysis of Using Reclaimed Asphalt Pavement (Rap) as a Base Course Material. Final Report No. CDOT-2009-5. Colorado Department of Transportation Research, Denver,