Mix design, development, production and policies of recycled hot mix asphalt: A review

Sharma, Ankit; Naga, Gondaimei Ransinchung Rongmei; Kumar, Praveen; Rai, Priti

doi:10.1016/j.jtte.2022.06.004

Cited by 17 publications

(9 citation statements)

References 89 publications

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“…The tensile strength (σt) of two mixtures, one with 40% RCA and the other with 40% RCA and 4% CR, was estimated using the average failure loads of three specimens from each mixture. The tensile strength (kg/cm2) was calculated using Equation (1), which takes into account the collapse load (P) in (kg), sample radius (b) in (cm), sample height (H) in (cm), and steel punch radius (a) in (cm). Figure (9) shows the tensile strength values of the mixtures with different percentages of CR (3%, 4%, and 5%) at a temperature of 20°C.…”

Section: Fatigue Test Resultsmentioning

confidence: 99%

“…In this study, researchers used 60/70 penetration grade bitumen sourced from Suez to create samples for testing. They conducted laboratory tests to assess the physical characteristics of the bitumen, as shown in Figure (1). The obtained results, along with their corresponding limits, were compiled and presented in Table (1).…”

Section: Materials Test Equipment and Methods 41 Materials 411 Bitumenmentioning

confidence: 99%

“…They conducted laboratory tests to assess the physical characteristics of the bitumen, as shown in Figure (1). The obtained results, along with their corresponding limits, were compiled and presented in Table (1). RCA refers to granular materials obtained from the demolition of buildings and structures.…”

Section: Materials Test Equipment and Methods 41 Materials 411 Bitumenmentioning

confidence: 99%

“…The use of waste and secondary materials in hot mix asphalt (HMA) has gained recognition for its mechanical and environmental advantages. Various studies, including those materials have highlighted the positive attributes of using materials such as construction and demolition waste in HMA [1,2,3]. These materials offer both mechanical and environmental benefits, making them an attractive choice for asphalt production.…”

Section: Introductionmentioning

confidence: 99%

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Development of Sustainable Asphalt Pavement Mixture Using Recycled concrete aggregate, Crumb Rubber and Waste Engine Oil

Rafat Saad,

Salah Eldeen,

Ezzeldeen Ahmed Mostafa

2023

Engineering Research Journal

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The incorporation of crumb rubber derived from waste tires into asphalt mixtures is an effective strategy for improving the fatigue resistance of asphalt pavement. This research focused on hot mix asphalt (HMA) mixtures that replaced 40% of natural aggregate (limestone) with recycled concrete aggregates (RCA) treated with waste engine oil (WEO). Two types of asphalt binders were used: traditional AC60-70 and the same binder modified with 3%, 4%, and 5% crumb rubber (CR) by the weight of bitumen. The study aimed to investigate the influence of CR polymers on asphalt pavement performance and explore the feasibility of using WEO for asphalt modification. Various asphalt mixtures with different CR percentages were tested to evaluate their mechanical properties, including stability, fatigue resistance, permanent deformation, and loss of stability. The durability and resistance of the asphalt mixtures were also assessed through indirect tensile strength testing before and after exposure to water. The study found that the CR-modified mixes showcased several advantages compared to conventional mixes. These included enhanced fatigue and permanent deformation properties, reduced susceptibility to temperature variations, and improved resistance to moisture damage. Overall, the CR-modified mixes demonstrated improved performance compared to the regular mixes. The results indicated that the developed HMA, which included 40% RCA and 4% crumb rubber binder, improved stability and the Percentage of Indirect Tensile Strength Ratio (ITSR). Among the different CR percentages tested, the 4% crumb rubber modification demonstrated the highest fatigue life. Furthermore, the addition of 3% waste engine oil to the modified control mix (MCM) with 40% RCA and 4% CR appeared to enhance the durability of the asphalt mixture. Ultimately, the utilization of MCM with 40% RCA, 4% CR, and 3% WEO was found to enhance the performance of the asphalt pavement mixtures that were developed.

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Section: Fatigue Test Resultsmentioning

confidence: 99%

Section: Materials Test Equipment and Methods 41 Materials 411 Bitumenmentioning

confidence: 99%

Section: Materials Test Equipment and Methods 41 Materials 411 Bitumenmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Development of Sustainable Asphalt Pavement Mixture Using Recycled concrete aggregate, Crumb Rubber and Waste Engine Oil

Rafat Saad,

Salah Eldeen,

Ezzeldeen Ahmed Mostafa

2023

Engineering Research Journal

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show abstract

“…This technology implies significant environmental gains [ 42 , 43 ]: Reduced depletion of both natural fossils and elements resources; Reduced landfill disposal for construction and demolition waste; Reduced impacts for transporting asphalt to roadworks; Reduced costs to buy and transport natural aggregates and bitumen. …”

Section: Introductionmentioning

confidence: 99%

Experimental Analysis of Hot-Mix Asphalt (HMA) Mixtures with Reclaimed Asphalt Pavement (RAP) in Railway Sub-Ballast

et al. 2023

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Environmental safeguards promote innovative construction technologies for sustainable pavements. On these premises, this study investigated four hot mix asphalt (HMA) mixtures—i.e., A, B, C, and D—for the railway sub-ballast layer with 0%, 10%, 20%, and 30% reclaimed asphalt pavement (RAP) by total aggregate mass and a rejuvenator additive, varying the bitumen content between 3.5% and 5.0%. Both Marshall and gyratory compactor design methods have been performed, matching the stability, indirect tensile strength, and volumetric properties of each mixture. Dynamic stiffness and fatigue resistance tests provided mechanical performances. Laboratory results highlighted that the RAP and the rejuvenator additive increase the mechanical properties of the mixtures. In addition, the comparative analysis of production costs revealed up to 20% savings as the RAP content increased, and the life cycle impact analysis (LCIA) proved a reduction of the environmental impacts (up to 2% for resource use-fossils, up to 7% for climate change, and up to 13% for water use). The experimental results confirm that HMA containing RAP has mechanical performances higher than the reference mixture with only virgin raw materials. These findings could contribute to waste management and reduce the environmental and economic costs, since the use of RAP in the sub-ballast is not, so far, provided in the Italian specifications for railway construction.

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Evaluation of Rheological Characteristics of Pyro-Oil Modified Reclaimed Asphalt Binders Using Activation Energy Approach

Dare,

Bhagat,

Hedaoo

2024

Lecture Notes in Civil Engineering

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Mix design, development, production and policies of recycled hot mix asphalt: A review

Cited by 17 publications

References 89 publications

Development of Sustainable Asphalt Pavement Mixture Using Recycled concrete aggregate, Crumb Rubber and Waste Engine Oil

Development of Sustainable Asphalt Pavement Mixture Using Recycled concrete aggregate, Crumb Rubber and Waste Engine Oil

Experimental Analysis of Hot-Mix Asphalt (HMA) Mixtures with Reclaimed Asphalt Pavement (RAP) in Railway Sub-Ballast

Evaluation of Rheological Characteristics of Pyro-Oil Modified Reclaimed Asphalt Binders Using Activation Energy Approach

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