Effect of RAP on Cracking and Rutting Resistance of HMA Mixes

Saha, Rajib; Karki, Bishal; Berg, A.; Melaku, R. S.; Gedafa, Daba S.

doi:10.1061/9780784480939.008

Cited by 7 publications

(4 citation statements)

References 2 publications

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“…Hot mix asphalt (HMA) or asphalt mixture is composed of bitumen binder and a combination of fine and coarse aggregates along with a certain amount of air voids with or without admixtures (Al-Bayati Tighe and Achebe 2018). The bounded asphalt binder and mineral aggregate form a stone-like structure that gives strength and toughness to the pavement system (Saha et al 2017). Due to rapidly growing urbanization, depletion of natural resources, greenhouse gases, lack of energy resources, and increase in oil prices throughout the world, the pavement industry is facing shortage and unavailability of energy resources and adhesive materials (Hasaninia and Haddadi 2017).…”

Section: Introductionmentioning

confidence: 99%

“…Research on sustainable and green pavements is underway throughout the world due to the greenhouse effect, depleting natural resources, premature pavement failures and bio-waste issues (Borghi et al 2017, Angius 2018. Advancement in pavement structure designs, materials production technologies and innovation in building materials is inevitable due to high axle loads, rapidly increasing traffic volumes and varying climatic conditions (Saha et al 2017). Such scenarios have compelled the researchers produce to develop innovative binding materials from renewable energy resources for use in HMA to resist early failures (Menglan et al 2017), (Wang et al 2020).…”

Section: Introductionmentioning

confidence: 99%

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Evaluating the effect of paper waste lignin in hot mix asphalt

Khadim,

Ahmad

2024

Eng. Res. Express

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Asphalt is a viscoelastic material which performs to resist rutting, fatigue cracking, and moisture susceptibility under different loading and temperature conditions. The use of innovative and renewable pavement construction materials is inevitable due to high axle loads, rapidly increasing traffic volumes, and varying climatic conditions. This study aims to assess the effect as well as the optimum dosage of paper waste lignin for use in hot mix asphalt (HMA). Lignin from the paper industry with dosage ratios of 5, 10, 15, and 20%, was utilized to study the effect of the addition of lignin to the asphalt binder. Virgin and lignin-modified binder samples, before and after the aging process, were subjected to physical testing through penetration, softening point, ductility, viscosity and specific gravity and rheological characteristics through dynamic shear rheometer (DSR), bending beam rheometer (BBR), and rational viscometer (RV).. The fractional composition was assessed through saturates, aromatics, resins and asphaltenes (SARA) fractional composition technique. Statistical analysis was also performed to find correlation of different physical and rheological parameters. Furthermore, based on optimum dosage, the performance of asphalt mixtures was studied against rutting, fatigue cracking, and moisture susceptibility. The results indicated that the addition of lignin has improved the physical properties significantly. The amount of asphaltene decreased and aromatics increased in SARA fractional analysis. Moreover, the Colloidal Instability Index (CII) has also indicated a stable structure of the binder. The rheological characteristics are improved after modification. The asphalt mixture tests revealed that addition of lignin with optimum dosage (10%) has improved the performance against rutting, fatigue cracking and moisture susceptibility. Statistical analysis indicated good co-relation among different physical and rheological parameters. This study concludes that 10% dosage is the optimum dosage that can successfully replace the virgin asphalt binder for performance of hot mix asphalt.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Evaluating the effect of paper waste lignin in hot mix asphalt

Khadim,

Ahmad

2024

Eng. Res. Express

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“…This reduction is achieved by avoiding the energy-intensive processes of asphalt production and long-distance transportation, thus promoting a more sustainable approach. However, laboratory studies indicate that due to the hard, brittle, and less elastic aged binder present in RAP, recycled mixes tend to exhibit poor flexibility, making them less susceptible to rutting [12][13][14][15] but, at the same time, more prone to fatigue [16][17][18][19][20] and thermal cracking [21][22][23][24]. As a result, asphalt concrete may be rejected due to durability issues or for failing to achieve the long-term performance standards exhibited by conventional HMA.…”

Section: Introductionmentioning

confidence: 99%

Influence of Compaction Energy on the Mechanical Performance of Hot Mix Asphalt with a Reclaimed Asphalt Pavement (RAP) and Rejuvenating Additive

Limón-Covarrubias,

Ochoa-Ambriz,

Avalos-Cueva

et al. 2023

Infrastructures

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The Mexican asphalt paving industry is increasingly interested in using reclaimed asphalt pavement (RAP) to produce hot mix asphalt (HMA) due to its economic and environmental advantages. However, an ill-defined methodology for integrating RAP into the HMA mix design has hindered its use. This paper investigates how compaction energy affects both rejuvenated and non-rejuvenated recycled HMA mixtures. A Superpave gyratory compactor was used to determine the optimal binder content and find a balance between flexibility and stiffness that meets cracking and rutting resistance requirements. Various recycled HMA mixtures were subjected to different compaction energy levels (75, 100, and 125 gyros), different RAP contents (15%, 30%, and 45%), and various dosages (10%, 15%, and 36%) of the rejuvenating additive Maro-1000®, following the blending chart. Performance was evaluated using the Hamburg wheel tracking test (HWTT) and the fracture energy flexibility index test (I-FIT). The results demonstrate that mixtures with RAP, a rejuvenating admixture, and varying compaction energies exhibit favorable mechanical behavior. However, both rejuvenated and non-rejuvenated mixes with 15% RAP showed performance comparable to conventional mixtures. They improved stiffness by up to 46% while reducing the flexibility index to 25%, striking a balanced equilibrium between rutting resistance and cracking susceptibility.

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“…The values of rutting depth of each sample will be obtained during this test. The test simulates the actual repetitive loads on the road in order to detect material rutting performance on the pavement samples (Saha et al 2017). 5600 g of aggregate was added to 288g of bitumen; therefore, the total weight of the regular asphalt mixture will be used is 5888g, and 5600g of aggregate was added to 257.7g of bitumen.…”

Section: Hamburg Wheel Tracker Testmentioning

confidence: 99%

Green Asphalt Pavement Mix Design for Kuwait

Proceedings of the International Conference on Industrial Engineering and Operations Management

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Kuwait suffers from potholes due to pavement deterioration when exposed to moisture. This paper investigates the feasibility of using recycled asphalt pavement in Hot Mix Asphalt design. Questionnaires were conducted to analyze the effects of pores on the society. The results of a series of laboratory tests, which compared the performance of both the recycled and the regular mixtures, showed that the recycled mixture has higher stability and flow, lower rutting depth for wet and dry samples, and lower voids filled with asphalt and voids in mineral aggregate. On the other hand, the tensile strength ratio test results recommended to reduce the proportion of recycled aggregate. While, the HWTD test required 20% reduction in the wet recycled mixture. Therefore, the recycled mixture reveals a higher efficiency in saving costs and improving mixtures used for potholes maintenance activities. All the results proved that the recycled asphalt mixtures are most preferred since they are affordable and perform reasonably well compared to regular asphalt mixtures. As a future work, smaller percentages of recycled aggregate should be tested to check the robustness and sustainability of the designed recycled asphalt mixture. Furthermore, more experiments can be run to test other mix parameters and properties.

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Effect of RAP on Cracking and Rutting Resistance of HMA Mixes

Cited by 7 publications

References 2 publications

Evaluating the effect of paper waste lignin in hot mix asphalt

Evaluating the effect of paper waste lignin in hot mix asphalt

Influence of Compaction Energy on the Mechanical Performance of Hot Mix Asphalt with a Reclaimed Asphalt Pavement (RAP) and Rejuvenating Additive

Green Asphalt Pavement Mix Design for Kuwait

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