Investigation of rutting performance of dense and gap graded recycled asphalt mixtures

Bharath, G.; Kakade, Vijay; Reddy, K. S.; Tandon, Vivek; Reddy, M. Amaranatha

doi:10.1007/s41062-023-01221-7

Cited by 4 publications

(1 citation statement)

References 34 publications

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“…According to a recent literature review [2], rutting is considered to be of asphalt concrete origin only. Also, some of the recent studies [4][5][6] focused on the characteristics and properties of the hot mixed asphalt to reduce rutting sensitivity. However, instigations at the AASHTO road test revealed that 68% of the permanent deformations occur not in the asphalt concrete but in the underlying base, subbase, and subgrade layers [7].…”

Section: Introductionmentioning

confidence: 99%

Determination of Permanent Deformations of Non-Cohesive Soils in Pavement Structures under Repeated Traffic Load

Vamos,

Szendefy

2024

Eng

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One of the main types of distress in pavement structures is rutting, which may also reduce serviceability significantly. Most design methods typically attribute rutting to the asphalt layer alone, proposing that it can be managed by controlling vertical deformation or stress at the subgrade’s top. Furthermore, these methods frequently lack precise measurements for rut depth. On-site measurements show that the majority of permanent deformation occurs in the unbound layers beneath the asphalt; attention should be directed towards these layers. In recent literature, there are calculation methods that account for accumulating strains in soils. However, further investigation is needed regarding the effect of soil properties and the significance of the pavement cross-section. The literature is also somewhat contractionary regarding the origin of permanent deformations. In this research, the residual settlement of soils (base, subbase, and subgrade) under flexible pavement systems was analyzed due to the repeated traffic loads. Rut depths were calculated and analyzed using the High-Cycle Accumulation (HCA) model. The different behaviour in each course of the pavement system is discussed to reveal their contribution to total ruts. The effect of the grain size distribution of the subgrade was analyzed, and its significance on the rutting depths was demonstrated. Standardized pavement cross-sections with different asphalt thicknesses were evaluated, and the calculated settlements of the pavement originating from the ground during the design lifetime are also presented. It is shown that, with the same number of repetitions, the settlements calculated in each traffic load class are proportional to the thickness of the asphalt course. The contribution of the base, subbase, and subgrade courses to the total settlement is also presented for different subgrade types and traffic load classes.

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Section: Introductionmentioning

confidence: 99%

Determination of Permanent Deformations of Non-Cohesive Soils in Pavement Structures under Repeated Traffic Load

Vamos,

Szendefy

2024

Eng

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On the Influencing Factors of Non-asphalt Originated Rutting in Flexible Pavements

Vámos,

Szendefy

2024

Transp. Infrastruct. Geotech.

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Rutting can substantially impact pavement serviceability and driving safety. Since most of the permanent deformation develops in the unbound layers beneath the asphalt course, the focus should be on these layers. In this research, rut depths were calculated and analyzed using the high-cycle accumulation model, where the resilient response and cyclic strain amplitude were determined through finite element analysis. Consequently, settlement depression curves were described for various subgrades and cross-sections. It was observed that grain size distribution, particularly the uniformity coefficient, plays a decisive role in rutting depth. Analysis of the relationship between settlements and axle loads indicates that the calculated settlements demonstrate a linear increase relative to the axle load. For various axle loads, the number of axle passes required to induce an equivalent settlement to the standard axle was established. The possibility to reduce the depth of ruts by increasing the thickness of the subbase was also investigated. It was found that the predicted rutting is highly influenced by the particle shape (angular, rounded, or mixed material) of the subbase. It was found that the primary portion of permanent deformations occurs within the subgrade.

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Evaluation of healing characteristics of reclaimed asphalt pavement (RAP) mixtures using monotonic loading

Mullapudi,

Noojilla,

Tavva

et al. 2024

Innov. Infrastruct. Solut.

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Investigation of rutting performance of dense and gap graded recycled asphalt mixtures

Cited by 4 publications

References 34 publications

Determination of Permanent Deformations of Non-Cohesive Soils in Pavement Structures under Repeated Traffic Load

Determination of Permanent Deformations of Non-Cohesive Soils in Pavement Structures under Repeated Traffic Load

On the Influencing Factors of Non-asphalt Originated Rutting in Flexible Pavements

Evaluation of healing characteristics of reclaimed asphalt pavement (RAP) mixtures using monotonic loading

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