Effect on Pavement Performance of a Subbase Layer Composed by Natural Aggregate and RAP

Montepara, Antonio; Tebaldi, Gabriele; Marradi, Alessandro; Betti, Giacomo

doi:10.1016/j.sbspro.2012.09.947

Cited by 21 publications

(8 citation statements)

References 4 publications

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“…The second step is a long-term analysis aimed at researching the efficiency and characteristics of mixtures using non-destructive testing instruments such as the Lightweight Deflectometer (LWD), falling weight deflectometer (FWD), and ground penetrating radar (GPR). The study presented by Montepara et al (2012) is part of a more comprehensive project aimed at testing mixture efficiency with a high percentage of RAP when used as a sub-base or base layer. To achieve this goal, a pavement test truck was specifically designed and constructed within an asphalt concrete plate plant, attempting to simulate a real pavement that is subjected to heavy vehicle loads moving at low speed.…”

Section: Permeable Pavement Sub-basementioning

confidence: 99%

“…It should be noted that letters identified following section identification number refers to the composition of the layers of building. N refers in particular to subbase produced by natural aggregate only and R to subbase produced by combining 50 percent of natural aggregates with percent RAP (Montepara et al, 2012).…”

Section: Permeable Pavement Sub-basementioning

confidence: 99%

“…Fig. 4 Grading curve of subbase with only natural aggregates and blended with 50% RAP (Montepara et al, 2012).…”

Section: Permeable Pavement Sub-basementioning

confidence: 99%

See 2 more Smart Citations

Feasibility of Low-Carbon Permeable Pavement Systems (Pps) for Stormwater Management

Tota-Maharaj¹,

Adeleke²,

Staddon³

et al. 2021

J. Urb. Environ. Engng

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Section: Permeable Pavement Sub-basementioning

confidence: 99%

Section: Permeable Pavement Sub-basementioning

confidence: 99%

See 1 more Smart Citation

Feasibility of Low-Carbon Permeable Pavement Systems (Pps) for Stormwater Management

Tota-Maharaj¹,

Adeleke²,

Staddon³

et al. 2021

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“…The M r of unbound material is required in the mechanistic-empirical pavement design guide. Montepara et al [10] stated that the usage of the RAP as a subbase material, even through blending together with virgin aggregates, is the focus of increasing worldwide interest due to the potential for high amounts of RAP to be recycled in comparison to other recycling techniques.…”

Section: Use Of Rap For Unbound Pavement Layersmentioning

confidence: 99%

A Sustainability Perspective for Unbound Reclaimed Asphalt Pavement (RAP) as a Pavement Base Material

Plati

Cliatt

2018

Sustainability

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The present study aims to investigate reclaimed asphalt pavement (RAP) materials for utilization for a pavement base layer material with the goal towards increasing the reutilization of materials and the movement towards increased pavement sustainability. Reduced cost for materials and transportation of materials, overall environmental benefits and many other advantages have led to increased interests in utilizing RAP in pavements including as base materials for highway/roadway construction projects. The potential advantages of utilizing RAP as an unbound base material are known; however, its overall application is still limited partially due to the lack of systematic evaluation studies for the parameterization of RAPs mechanical behavior in pavement design. With this in mind, the current investigation focuses on the resilient modulus (Mr) properties of RAP aggregates in terms of a material’s elastic response. Experimental data from tri-axial stress tests on specimens consisting of RAP, aggregates and a mixture of both materials are investigated. A number of constitutive models for the description of mechanical behavior of RAP materials are investigated. The required procedures for determining the constitutive constants of the constitutive models is outlined for the aforementioned materials. A comparative analysis is applied, and the related results are evaluated. The main conclusion is that RAP materials can be utilized as a base material in the framework of pavement sustainability, as its behavior under loading conditions are similar to virgin aggregate (VA) materials and can be simulated by using appropriate constitutive models for pavement design processes.

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“…The LWD is used to evaluate the surface modulus of unbound layers, to analyze the short-term bearing capacity of cold recycled layers (11), to detect the self-cementing properties of recycled aggregates (12), to evaluate the performance of subbase mixtures made by blending natural aggregates and reclaimed asphalt pavement (13), and to implement continuous compaction control systems (14).…”

mentioning

confidence: 99%

Subgrade and Foundation Dynamic Performance Evaluation by Means of Lightweight Deflectometer Tests

Marradi

Pinori

Betti

2014

Transportation Research Record: Journal of the Transportation R

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Evaluation of the in situ bearing capacity of subgrade and foundation layers is carried out by means of enhanced dynamic testing devices such as the lightweight deflectometer (LWD). These devices offer many practical advantages over traditional plate load tests and allow simulation of real conditions of loads induced by heavy vehicle traffic. Devices provided with a load cell and a geophone can acquire load-deflection time histories, sampling data every 0.25 ms, with a high level of accuracy. LWD data are used mainly to calculate the surface modulus of the tested materials with the Boussinesq equation; procedures specifically developed for estimating the material compaction level achieved on-site are coming into use. This paper focuses on the use of the LWD for investigating the performance of subgrade and foundation layer materials for stiffness (bearing capacity) and compaction achieved. Great effort has been devoted to improving deflectometric tests, correlating energy loss (energy spent to deflect the tested surface, determined as the area enclosed by the load-deflection graph) to the performance of tested materials, especially for compaction level achieved on site. The influence of load frequency is evaluated and described. The results, obtained at two trial fields, confirm the reliability of the LWD in roadwork quality control and for a staged design approach to earthworks

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Effect on Pavement Performance of a Subbase Layer Composed by Natural Aggregate and RAP

Cited by 21 publications

References 4 publications

Feasibility of Low-Carbon Permeable Pavement Systems (Pps) for Stormwater Management

Feasibility of Low-Carbon Permeable Pavement Systems (Pps) for Stormwater Management

A Sustainability Perspective for Unbound Reclaimed Asphalt Pavement (RAP) as a Pavement Base Material

Subgrade and Foundation Dynamic Performance Evaluation by Means of Lightweight Deflectometer Tests

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