us7758235b1 recycled asphalt pavement (rap) preparation

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US7758235B1 - Recycled asphalt pavement (RAP) preparation ...

US7758235B1 US11/214,750 US21475005A US7758235B1 US 7758235 B1 US7758235 B1 US 7758235B1 US 21475005 A US21475005 A US 21475005A US 7758235 B1 US7758235 B1 US 7758235B1 Authority US United States Prior art keywords asphalt pavement heater rap recycled asphalt hot Prior art date 2004-09-27 Legal status (The legal status is an assumption and is not a

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» Recycled Asphalt Pavement

Recycled Asphalt Pavement. The 1973 Arab Oil Embargo saw the price of crude oil rise from less than $10 a barrel to more than $35 by 1981. Suddenly binder costs, only 5% of the total mix, were now 68% of the mix materials costs. This dramatic price increase, the aging of the U.S. highway system and the realization both aggregates and binder ...

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Recycled Asphalt Pavement - Purdue University

RECYCLED ASPHALT PAVEMENT SAVING PAVEMENT SAVING MONEY SAVING THE ENVIRONMENT Dudley Bonte, Rieth-Riley Becky McDaniel, North Central Superpave Center Indiana LTAP Asphalt Workshop November 12, 2009 1

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Reclaimed Asphalt Pavement - an overview ScienceDirect ...

S.-C. Huang, H. Di Benedetto, in Advances in Asphalt Materials, 2015 The use of reclaimed asphalt pavement (RAP) has become relatively common practice in most countries, as it is both an environmentally and economically attractive proposition. A survey conducted by the Federal Highway Administration’s RAP expert task group shows that the average RAP content in hot mix is only

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Using Recycled Asphalt for Pavement Preservation Surface ...

22-06-2021  At the end of 2020, the Federal Highway Administration (FHWA) released a new report that outlines the success of using Reclaimed Asphalt Pavements (RAP) in pavement preservation treatments. The ...

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US Patent for Recycled asphalt pavement (RAP) preparation ...

Thermal processing of recycled asphalt pavement (RAP), having up to approximately 8% or more moisture content, dries and preheats the material to enhance efficient recycling in a hot mix asphalt plant. A combustor and heat exchanger reheat circulating hot oil, which with hot gas, moves through a hollow auger and around the RAP counter to the flow of RAP.

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Recycled asphalt pavement - fly ash geopolymers as a ...

In this research, a low-carbon stabilization method was studied using Recycled Asphalt Pavement (RAP) and Fly Ash (FA) geopolymers as a sustainable pavement material. The liquid alkaline activator (L) is a mixture of sodium silicate (Na 2 SiO 3 ) and sodium hydroxide (NaOH), and hi

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Reclaimed Asphalt Pavement (RAP)

Reclaimed Asphalt Pavement in Asphalt Mixtures: State of the Practice • State-of-the-practice information on including higher amounts of RAP in asphalt mixtures. • “The performance and life of pavement containing up to 30 percent RAP is similar to virgin pavements with no RAP.” Publication No. FHWA-HRT-11-021 April 2011

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Reclaimed Asphalt Pavement - an overview ScienceDirect ...

S.-C. Huang, H. Di Benedetto, in Advances in Asphalt Materials, 2015 The use of reclaimed asphalt pavement (RAP) has become relatively common practice in most countries, as it is both an environmentally and economically attractive proposition. A survey conducted by the Federal Highway Administration’s RAP expert task group shows that the average RAP content in hot mix is only

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Leaching Characteristics of Recycled Asphalt Pavement: RAP ...

specifications for using Recycled Asphalt Pavement (RAP) as a base, subbase or general fill, 2) evaluating the strength gain of RAP within the first two months after construction, 3) evaluating RAP-Soil mixes in the laboratory, and 4) evaluating the environmental performance of RAP in the field.

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Reclaimed Asphalt Pavement (RAP) FAQ

Municipalities and pavement contractors can recycle RAP materials for $18.00 USD per ton approximately via using a PT-PRO Recycler. If at the asphalt plant you purchased a hot mix costing you $78.00 per ton, then you acquire a beneficial cost savings of $60.00 per ton. Thus, if an operator recycles 50 tons of RAP daily for 30 days, then he ...

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CN109704648A - A kind of Recycled Asphalt Pavement and ...

The invention discloses a kind of Recycled Asphalt Pavements and preparation method thereof.Recycled Asphalt Pavement comprises the following components in parts by weight: 50-80 parts of new pitch, 10-20 parts newly gather materials, 3-8 parts of miberal powders, 40-60 parts of RAP material, 1-5 portions of regenerative agents, 3-6 parts of thermosetting resins, 1-3 parts of lotus leaf ...

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Evaluation of Characteristics of Recycled Asphalt Pavement ...

Sulaimani Journal for Engineering Sciences / Volume 6 - Number 4 – 2019 86 Evaluation of Characteristics of Recycled Asphalt Pavement (RAP) Materials

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Use of Reclaimed Asphalt Pavement and Recycled Asphalt ...

01-08-2021  TRB's National Cooperative Highway Research Program (NCHRP) Synthesis 495: Use of Reclaimed Asphalt Pavement and Recycled Asphalt Shingles in Asphalt Mixtures summarizes current practices for the use of reclaimed asphalt pavement (RAP) and recycled asphalt shingles (RAS) in the design, production, and construction of asphalt mixtures.

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Assessment of Eco-Friendly Pavement Construction and ...

recycling Article Assessment of Eco-Friendly Pavement Construction and Maintenance Using Multi-Recycled RAP Mixtures David Vandewalle 1,2, Vítor Antunes 3,4,*, José Neves 3 and Ana Cristina Freire 4 1 Department of Civil Engineering, Ghent University, St. Pieternieuwstraat 33, 9000 Ghent, Belgium; [email protected]

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US Patent for Recycled asphalt pavement (RAP) preparation ...

Thermal processing of recycled asphalt pavement (RAP), having up to approximately 8% or more moisture content, dries and preheats the material to enhance efficient recycling in a hot mix asphalt plant. A combustor and heat exchanger reheat circulating hot oil, which with hot gas, moves through a hollow auger and around the RAP counter to the flow of RAP.

Get price

Recycled asphalt pavement (RAP) preparation system

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Recycled asphalt pavement (RAP) preparation system

Thermal processing of recycled asphalt pavement (RAP), having up to approximately 8% or more moisture content, dries and preheats the material to enhance efficient recycling in a hot mix asphalt plant. A combustor and heat exchanger reheat circulating hot oil, which with hot gas, moves through a hollow auger and around the RAP counter to the flow of RAP.

Get price

Reclaimed Asphalt Pavement (RAP)

Reclaimed Asphalt Pavement in Asphalt Mixtures: State of the Practice • State-of-the-practice information on including higher amounts of RAP in asphalt mixtures. • “The performance and life of pavement containing up to 30 percent RAP is similar to virgin pavements with no RAP.” Publication No. FHWA-HRT-11-021 April 2011

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Recycled asphalt pavement - fly ash geopolymers as a ...

In this research, a low-carbon stabilization method was studied using Recycled Asphalt Pavement (RAP) and Fly Ash (FA) geopolymers as a sustainable pavement material. The liquid alkaline activator (L) is a mixture of sodium silicate (Na 2 SiO 3 ) and sodium hydroxide (NaOH), and hi

Get price

Reclaimed Asphalt Pavement (RAP) FAQ

Municipalities and pavement contractors can recycle RAP materials for $18.00 USD per ton approximately via using a PT-PRO Recycler. If at the asphalt plant you purchased a hot mix costing you $78.00 per ton, then you acquire a beneficial cost savings of $60.00 per ton. Thus, if an operator recycles 50 tons of RAP daily for 30 days, then he ...

Get price

Evaluation of Characteristics of Recycled Asphalt Pavement ...

Sulaimani Journal for Engineering Sciences / Volume 6 - Number 4 – 2019 86 Evaluation of Characteristics of Recycled Asphalt Pavement (RAP) Materials

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Use of 100% Reclaimed Asphalt Pavement (RAP) Material in ...

recycled with the use of rejuvenators using currently available technologies. KEY WORDS: Rap, rejuvenator, recycling agents, modulus, creep compliance 1 INTRODUCTION Increased use of reclaimed asphalt pavement (RAP) material can have significant positive impact on the economics and environmental sustainability of pavement construction.

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Preparation and characterisation of modified reclaimed ...

This paper aims to investigate the best methods of utilisation of reclaimed asphalt pavements (RAP) in Egypt, to determine the effect of using 100% RAP instead of using virgin aggregates and asphalt; investigate the effect of thermoplastic elastomer polymer as asphalt modifier; and also improve the mechanical and physical characteristics and consequently improving the quality of asphalt paving ...

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Assessment of Eco-Friendly Pavement Construction and ...

recycling Article Assessment of Eco-Friendly Pavement Construction and Maintenance Using Multi-Recycled RAP Mixtures David Vandewalle 1,2, Vítor Antunes 3,4,*, José Neves 3 and Ana Cristina Freire 4 1 Department of Civil Engineering, Ghent University, St. Pieternieuwstraat 33, 9000 Ghent, Belgium; [email protected]

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