Evaluation of “long-term behaviour under traffic” of cement treated mixture with RAP

Romeo, Elena; Orazi, Michele; Orazi, Ugo Sergio; Accardo, Corrado; Noto, S.; Tebaldi, Gabriele

doi:10.1016/j.conbuildmat.2019.03.045

Cited by 9 publications

(3 citation statements)

References 8 publications

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“…irregularity and permanent deformation) in FDR-PC pavements are generally low provided cracks are sealed, especially in comparison with pavements recycled without or with different stabilisers [18,51,52]. Laboratory studies also confirm that FDR-PC mixtures are resistant against permanent deformation [44,102]. However, cement stabilised materials may still undergo permanent deformation due to crushing/erosion at the top of the layer, especially when overlaid by thin surface layers [59,[116][117][118].…”

Section: Field Behaviourmentioning

confidence: 99%

A review of full-depth reclamation of pavements with Portland cement: Brazil and abroad

Fedrigo

Núñez

Visser

2020

Construction and Building Materials

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Section: Field Behaviourmentioning

confidence: 99%

A review of full-depth reclamation of pavements with Portland cement: Brazil and abroad

Fedrigo

Núñez

Visser

2020

Construction and Building Materials

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“…The representative materials include granular materials, chemically stabilized materials, cement concrete and recycled materials, including reclaimed asphalt pavement (RAP), recycled construction and demolition waste, reclaimed concrete aggregate and so on. A large number of experiment-based material studies conducted by researchers (Mohammad et al, 2000;Camargo, 2008;Solanki et al, 2009;Cetin et al, 2010;Leite et al 2011;Bilodeau & Doré, 2012;Jiang & Fan, 2013;Arulrajah et al, 2015;Bestgen et al, 2016;Miao et al, 2016;Arshad, 2018;Li et al, 2019;Ji et al, 2019;Romeo et al, 2019;Bassim & Issa, 2020) during the last years have shown the all materials mentioned above demonstrate different mechanical properties in pavement structure, including the modulus which is usually employed to represent the stiffness of material, in particular. As a result of these developments, the distribution range of modulus for four kinds of typical materials used to construct the base layer is summarized as shown in Figure 1.…”

Section: Review Of the Distribution Range Of Modulus Of The Base Layer For Different Materialsmentioning

confidence: 99%

Influence of Modulus of Base Layer on The Strain Distribution for Asphalt Pavement

Yao

Jiang

et al. 2021

BJRBE

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In order to investigate the influence of modulus of the base layer on the strain distribution for asphalt pavement, the modulus ratio of the base layer and the AC layer (Rm) is introduced as a controlled variable when keeping modulus of the AC layer as a constant in this paper. Then, a three-layered pavement structure is selected as an analytical model, which consists of an AC layer with the constant modulus and a base layer with the variable modulus covering the subgrade. A three dimensional (3D) finite element model was established to estimate the strains along the horizontal and vertical direction in the AC layer under different Rm. The results show that Rm will change the distribution of the horizontal strains along the depth in the AC layer; the increase of Rm could reduce the maximum tensile strain in the AC layer, but its effect is limited; the maximum tensile strain in the AC layer does not necessarily occur at the bottom, but gradually rises to the middle with the increase of Rm. Rm could significantly decline the bottom strain in the AC layer, and there is a certain difference between the bottom and the maximum strain when Rm is greater than or equal to one, which will enlarge with increasing Rm. Rm could change the depth of the neutral axis in the AC layer, and the second neutral axis will appear at the bottom of the AC layer under a sufficiently large Rm. The average vertical compressive strain in the AC layer will significantly enlarge with the increase of Rm.

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“…The use of RAP for the construction of new roads has several environmental and economic benefits, such as the conservation of non-renewable resources, reduction of greenhouse gas emissions, landfill diversity, reduction of maintenance operations, as well as reduction of negative environmental impacts caused by the temporary storage of this material BIRD;HEIDRICH, 2009;CELAURO et al, 2015;YANG et al, 2015;ROMEO et al, 2019;CHHABRA;RANSINCHUNG;ISLAM, 2021;SPREADBURY et al, 2021). Nevertheless, the temporary storage of RAP before its application is an aspect that normally has not been considered.…”

Section: Introductionmentioning

confidence: 99%

Environmental effects of leachate extracts from reclaimed asphalt pavement: determination of metals, polycyclic aromatic hydrocarbon and acute toxicity to Daphnia magna

Moraes

Severino

Freitas

et al. 2022

Eng. Sanit. Ambient.

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Pavimentos asfálticos fresados (PAF) apresentam uma variedade de compostos orgânicos e inorgânicos que podem interagir com o meio ambiente e promover efeitos deletérios à saúde humana. Este estudo investigou o potencial de toxicidade dos PAF por meio da determinação de metais, hidrocarbonetos policíclicos aromáticos (HPA) e testes de toxicidade aguda com Daphnia magna. Foram comparados extratos lixiviados e solubilizados de amostras de PAF e de resíduo asfáltico fresco. As análises de Mn apresentaram concentrações acima do critério de aceitação normativo brasileiro para os extratos solubilizados. As amostras resultaram em concentrações de Cd, Cr e Pb, que estão na lista de substâncias que conferem periculosidade aos resíduos. Em relação aos HPA, duas amostras de lixiviado apresentaram concentração de BaP acima do valor máximo permitido e as demais amostras apresentaram valores de BaP próximos ao limite estabelecido. Ademais, foram identificadas nas amostras concentrações de BaA, BbF, IcdP e Chr. Para os ensaios de toxicidade aguda, duas amostras solubilizadas indicaram toxicidade aguda para Daphnia magna. Os resultados indicaram que o método de preparo dos lixiviados e do extrato solubilizado influenciaram os valores de metais e a toxicidade aguda. Duas amostras de PAF foram classificadas como resíduos perigosos, sinalizando que tais materiais apresentam potencial para lixiviar substâncias perigosas ao ambiente. Portanto, a disposição em solo desse tipo de resíduo deve ser criteriosa, uma vez que sua composição contém substâncias que podem impactar o meio ambiente e causar efeitos toxicológicos em organismos vivos.

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Evaluation of “long-term behaviour under traffic” of cement treated mixture with RAP

Cited by 9 publications

References 8 publications

A review of full-depth reclamation of pavements with Portland cement: Brazil and abroad

A review of full-depth reclamation of pavements with Portland cement: Brazil and abroad

Influence of Modulus of Base Layer on The Strain Distribution for Asphalt Pavement

Environmental effects of leachate extracts from reclaimed asphalt pavement: determination of metals, polycyclic aromatic hydrocarbon and acute toxicity to Daphnia magna

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