Utilization of reclaimed asphalt pavement (RAP) as granular sub-base material in road construction

2022 ◽  
Author(s):  
Sujit Kumar Pradhan ◽  
Gurukalyana Biswal
Keyword(s):  
Asphalt Pavement ◽  
Base Material ◽  
Road Construction ◽  
Reclaimed Asphalt Pavement ◽  
Reclaimed Asphalt

scholarly journals Laboratory characterization of reclaimed asphalt pavement for road construction in Egypt

2017 ◽  
Vol 44 (6) ◽  
pp. 417-425 ◽  
Author(s):  
E. Mousa ◽  
A. Azam ◽  
M. El-Shabrawy ◽  
S.M. El-Badawy
Keyword(s):  
Resilient Modulus ◽  
Asphalt Pavement ◽  
Road Construction ◽  
California Bearing Ratio ◽  
Base Layer ◽  
Coefficient Of Determination ◽  
Reclaimed Asphalt Pavement ◽  
Reclaimed Asphalt ◽  
Load Duration ◽  
The Impact

This paper presents the engineering characteristics of reclaimed asphalt pavement (RAP), blended with virgin aggregate for unbound base and subbase layers. The proportions of RAP were 0%, 20%, 60%, 80%, and 100% by total mass of the blend. The experimental laboratory testing included index properties such as gradation, modified Proctor compaction, California Bearing Ratio, and hydraulic conductivity. Repeated load resilient modulus testing was conducted on the blends. The impact of load duration on resilient modulus was also investigated. A strong inverse trend was found between resilient modulus and California Bearing Ratio. An accurate model was proposed for the prediction of the resilient modulus as a function of stress state and reclaimed asphalt pavement percentage with coefficient of determination of 0.94. Finally, multilayer elastic analysis of typical pavement sections with the base layer constructed of virgin aggregate and reclaimed asphalt pavement blends showed good performance.

scholarly journals Evaluation of Waste Engine Oil-Rejuvenated Asphalt Concrete Mixtures with High RAP Content

2018 ◽  
Vol 2018 ◽  
pp. 1-8 ◽  
Author(s):  
A. A. Mamun ◽  
H. I. Al-Abdul Wahhab
Keyword(s):  
Resilient Modulus ◽  
Asphalt Pavement ◽  
Construction Materials ◽  
Road Construction ◽  
Engine Oil ◽  
Reclaimed Asphalt Pavement ◽  
Reclaimed Asphalt ◽  
Waste Engine Oil ◽  
Increasing Demand ◽  
Aged Binder

The use of large proportions of reclaimed asphalt pavement is necessary to meet the increasing demand for road construction materials in a sustainable way. One of the challenges of using a greater percentage of reclaimed asphalt pavement (>30%) is the greater stiffness of mixes incorporating it. While this stiffness problem is usually resolved by using different commercial rejuvenators, there are circumstances in which commercial rejuvenators are not available. Therefore, this study evaluates the potential of using waste engine oil as a substitute for commercial rejuvenators for the higher percentage of reclaimed asphalt pavement that could meet the increasing demand in a more sustainable way. To assess the possibility of using a higher percentage of reclaimed asphalt pavement in road construction, different percentages of reclaimed asphalt pavement (30%, 40%, and 50%) are used. Following the property of the aged binder, three different percentages (7%, 13%, and 20%) of waste engine oil are considered. Each percent of waste engine oil is incorporated with one of the three mixes. The mixes (with the minimum required Marshall criteria) are evaluated for different properties, namely, their indirect tensile strength, resilient modulus, and durability. Finally, those properties are compared to those of the mixes rejuvenated by commercial rejuvenators. It is observed that, for the aforementioned properties, 7% to 13% of waste engine oil is identical to the commercial rejuvenator for the mixes with 30% to 40% of reclaimed asphalt pavement.

scholarly journals Evaluating the Mechanical Performance Properties of Reclaimed Asphalt Pavement Rejuvenated with Different Rejuvenators

2020 ◽  
Vol 8 (1) ◽  
pp. 46-56
Author(s):  
Hasan H Joni ◽  
Rasha H A Al-Rubaee ◽  
Mohammed Kh. Shames
Keyword(s):  
Tensile Strength ◽  
Mechanical Performance ◽  
Asphalt Pavement ◽  
Road Construction ◽  
Waste Cooking Oil ◽  
Reclaimed Asphalt Pavement ◽  
Environmental Benefit ◽  
Performance Properties ◽  
Reclaimed Asphalt ◽  
Shear Strength Test

The importance of sustainability in road construction using and renewing the Reclaimed Asphalt Pavement (RAP) resulting from the reconstruction or periodic maintenance of roads is a challenge that requires the use of regenerative additions to restore the characteristics of the old bitumen in pure rap, in order to improve the performance properties of these renewable mixers. As there are many promising studies in this regard. The objective of this study is to recycle and restore RAP using two types of renovators; Waste Cooking Oil (WCO) and Asphalt Cement (AC (85-100)). Five percentages (1, 1.5, 2, 2.5 and 3) % by weight of both types of renovators were added to the RAP, separately, for the purpose of rejuvenation. Marshall Test was performed on the renovated samples to obtain the optimum percentages, which will be adopted in subsequent tests, which include; indirect tensile strength (ITS), tensile strength Ratio (TSR) and Duple Punch Shear Strength Test (DPSST) to evaluate the performance of rejuvenated RAP mixes and compare them with the original RAP. The outcomes indicated that (1.5 and 2.5) % are the optimal percentages for (WCO and AC (85-100)), respectively. In addition, the results of the performance tests indicated that the renovated RAP mixes are better than the original RAP in terms of stability, temperature susceptibility, stripping resistance and resistance to moisture damage, as well as achieving the specification requirements for the surface course. This indicates that the recycling process is of economic, environmental benefit and industrial sustainability.

Laboratory and Field Evaluation of Cement-Treated Reclaimed Asphalt Pavement Blends as Roadway Base Material

2012 ◽  
Vol 9 (2) ◽  
pp. 103714 ◽  
Author(s):  
Soheil Nazarian ◽  
Deren Yuan ◽  
Laureano Hoyos ◽  
Anand Puppala ◽  
T. Edil ◽  
...  
Keyword(s):  
Asphalt Pavement ◽  
Base Material ◽  
Field Evaluation ◽  
Reclaimed Asphalt Pavement ◽  
Reclaimed Asphalt

scholarly journals Comparative Evaluation of Waste Cooking Oil and Waste Engine Oil Rejuvenated Asphalt Concrete Mixtures

2020 ◽  
Vol 45 (10) ◽  
pp. 7987-7997 ◽  
Author(s):  
Abdullah Al Mamun ◽  
H. I. Al-Abdul Wahhab ◽  
M. A. Dalhat
Keyword(s):  
Resilient Modulus ◽  
Asphalt Pavement ◽  
Road Construction ◽  
Waste Cooking Oil ◽  
Engine Oil ◽  
Reclaimed Asphalt Pavement ◽  
Waste Oil ◽  
Reclaimed Asphalt ◽  
Cooking Oil ◽  
Waste Engine Oil

Abstract In road construction, different types of waste oil have been recommended to overcome the stiffening effect of reclaimed asphalt pavement content. However, the selection of an effective rejuvenator based on a comparative study can lead to using the resources more efficiently. In this study, waste cooking oil and waste engine oil are used to rejuvenate three different percentages (30%, 40%, and 50%) of reclaimed asphalt pavement following the current maximum industrial adaptability. The waste oil rejuvenated mixtures are compared to the fresh mixture, and mixtures rejuvenated with commercial rejuvenator. The moisture sensitivity, indirect tensile strength, and resilient modulus of the various asphalt mixtures are analyzed. Based on the statistical analyses and overall ranking, it is concluded that 7% of waste engine oil performs better till 40% of reclaimed asphalt pavement, whereas 13% of waste cooking oil can be used till 50% of reclaimed asphalt pavement.

scholarly journals Development of Cold In-Place Recycling with Bitumen Emulsion and Biomass Bottom Ash

Crystals ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 384
Author(s):  
Jorge Suárez-Macías ◽  
Juan María Terrones-Saeta ◽  
Francisco Javier Iglesias-Godino ◽  
Francisco Antonio Corpas-Iglesias
Keyword(s):  
Raw Materials ◽  
Asphalt Pavement ◽  
Bottom Ash ◽  
Road Construction ◽  
Reclaimed Asphalt Pavement ◽  
Reclaimed Asphalt ◽  
Bituminous Mixtures ◽  
Limestone Aggregate ◽  
Bitumen Emulsion ◽  
Biomass Fly Ash

Power generation from biomass is one of the most promising energy sources available today. However, this industry has a series of wastes derived from its activity, mainly biomass fly ash and biomass bottom ash. Biomass bottom ash is a waste that has no current use and, in most cases, is deposited in landfills. In turn, road construction is one of the activities that produces the most pollution, as it requires huge amounts of raw materials. Therefore, this research proposes the use of biomass bottom ashes, in an unaltered form, for the formation of cold in-place recycling with bitumen emulsion. This type of mixture, which is highly sustainable owing to the use of a high percentage of waste, was made with reclaimed asphalt pavement, biomass bottom ash, water, and bitumen emulsion. To this end, the grading curve of the materials was analyzed, different bituminous mixtures were made with varying percentages of emulsion and water, and the mechanical properties of the mixtures were analyzed. At the same time, the same type of mix was made with reclaimed asphalt pavement and commercial limestone aggregate, in order to compare the results. The tests showed a better mechanical behavior of the bituminous mixes made with biomass bottom ash, maintaining physical properties similar to those of conventional mixes. In short, it was confirmed that the production of this type of mix with biomass bottom ash was feasible, creating sustainable materials that reuse currently unused waste and avoid landfill disposal.

scholarly journals Characterization of Recovered Bitumen from Coarse and Fine Reclaimed Asphalt Pavement Particles

2019 ◽  
Vol 4 (2) ◽  
pp. 24 ◽  
Author(s):  
Saeed S. Saliani ◽  
Alan Carter ◽  
Hassan Baaj ◽  
Peter Mikhailenko
Keyword(s):  
Fine Particles ◽  
Asphalt Pavement ◽  
Environmental Scanning Electron Microscopy ◽  
Chemical Properties ◽  
Road Construction ◽  
Environmental Scanning ◽  
Reclaimed Asphalt Pavement ◽  
Clear Understanding ◽  
Reclaimed Asphalt ◽  
Low Temperature Cracking

In the current era of road construction, it is common to add a small amount of reclaimed asphalt pavement (RAP) in asphalt mixes without significantly changing properties such as stiffness and low-temperature cracking resistance. Not only can these mixes be better for the environment, but they can also improve certain properties like rutting resistance. However, there is no clear understanding of how RAP gradation and bitumen properties impact the mixture properties. In this study, a single RAP source was separated into coarse and fine particles and added into a hot mix asphalt (HMA). Fourier transform infrared (FTIR) spectrometry was used to evaluate the chemical properties of the bitumen, while environmental scanning electron microscopy (ESEM) image analysis was used to visualize the differences of the virgin and RAP bitumen at a microscopic level. The observed results indicated that the recovered bitumen from coarse RAP did not have the same characteristics as the fine RAP bitumen, and the interaction of RAP bitumen with virgin bitumen significantly depended on RAP particle size. The amount of active RAP bitumen in coarse RAP particles was higher than in fine RAP particles.

Long-Term Durability Studies on Chemically Treated Reclaimed Asphalt Pavement Material as a Base Layer for Pavements

2017 ◽  
Vol 2657 (1) ◽  
pp. 1-9 ◽  
Author(s):  
Anand J. Puppala ◽  
Aravind Pedarla ◽  
Bhaskar Chittoori ◽  
Vijay Krishna Ganne ◽  
Soheil Nazarian
Keyword(s):  
Fly Ash ◽  
Asphalt Pavement ◽  
Construction Material ◽  
El Paso ◽  
Base Material ◽  
The United States ◽  
Base Layer ◽  
Reclaimed Asphalt Pavement ◽  
Reclaimed Asphalt

For several years reclaimed asphalt pavement (RAP) material has been used as a construction material in hot-mix asphalt (HMA) to reduce material costs and stabilize pavements. Of the 45 million tons of RAP produced every year in the United States, only 33% is being used in HMA. Recent studies have demonstrated that RAP can be used effectively in base layers when it is blended with aggregate base materials and stabilized with cement or fly ash additives. This adoption in the pavement base layer helps maximize the reutilization of RAP material and minimize its disposal in landfills, thereby making it an environmentally friendly practice. However, studies reported so far addressed only the strength and stiffness characteristics of stabilized RAP in base layers in the short term, and not many studies have addressed its long-term behavior. In this study the long-term durability of untreated as well as stabilized specimens was tested by conducting standard durability testing to replicate the moisture fluctuations in the field from seasonal variations. In addition, leachate studies were conducted to examine the effect of rainfall infiltration on the leachability of the cement or fly ash stabilizer from stabilized RAP mixtures. Durability studies revealed a very low volumetric change and good retaining strength at the end of three, seven, and 14 cycles for RAP material from the El Paso, Texas, area, and leachate tests proved that the leaching of cement or fly ash stabilizer from RAP mixes cannot be considered to be a concern for long-term performance. However, approximately 2 years of field infiltration were replicated in the laboratory in this study. Of the several RAP mixtures studied, the mixture composed of 60% RAP and 40% base material with 2% cement was identified as an effective long-term-performing mixture.

Sign in / Sign up

Export Citation Format

Share Document