Modelling of the adhesion between reclaimed asphalt pavement aggregates and hydrated cement paste

Saïd, Sawssen El Euch Ben; Khay, Saloua El Euch; Achour, Taoufik; Loulizi, Amara

doi:10.1016/j.conbuildmat.2017.07.078

Cited by 26 publications

(2 citation statements)

References 14 publications

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“…With the aim of studying and finding the causes of the strength reduction experienced by RAP concretes, microscopic analyses were conducted. SEM images revealed the presence of voids between cement paste and RAP aggregates, indicating poor adhesion was responsible for strength reduction [41]. Moreover, the fine aggregate particles were fully incorporated within the asphalt matrix, and the presence of micro filler and agglomerated dust films on the surface of coarse RAP was observed, which were responsible for increased water absorption and limited strength properties [32,42].…”

Section: Introductionmentioning

confidence: 99%

Economical Assessment of Recycled Asphalt Pavement (RAP) Aggregate for Structural Concrete Production in Italy

Peduzzi,

Franco,

De Luca

et al. 2023

Buildings

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Structural concrete aggregate can be substituted with sustainable alternatives from construction and demolition waste, such as reclaimed asphalt pavement (RAP). This contribution assesses the RAP aggregate production chain and aims to investigate the economic aspect of RAP aggregate, evaluating the costs associated with its production and comparing them with the ones necessary to produce NA and recycled concrete aggregate (RCA). This analysis aims to provide additional information on the possible advantages of RAP aggregate use in order to promote sustainable construction. The evaluation was developed using a four-step methodology consisting of (i) determining the RAP aggregate production procedure; (ii) selecting a case study; (iii) defining the mix design; and (iv) performing a cost evaluation and comparing it to the cost of NA and RCA production. The results of the cost analysis of three concretes containing different RAP percentages (0%, 30%, and 45%) demonstrated that RAP’s presence led to more expensive admixtures, with the RAP unit cost being higher than NA (+155.39%). Some strategies were proposed to diminish RAP’s cost, resulting in a reduction of −39.64% with respect to NA’s cost and ranging from 45.13% to 67.30% when compared to RCA’s cost.

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Section: Introductionmentioning

confidence: 99%

Economical Assessment of Recycled Asphalt Pavement (RAP) Aggregate for Structural Concrete Production in Italy

Peduzzi,

Franco,

De Luca

et al. 2023

Buildings

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“…There is previous research regarding the effects of RAP on the mechanical properties of concrete. In general, there is evidence that the addition of RAP negatively impacts on the fundamental mechanical properties of concrete, such as its compressive strength (19)(20)(21)(22)(23), flexural and splitting tensile strength (24)(25)(26)(27)(28), and the modulus of elasticity (21)(22)(23)29).…”

Section: Introductionmentioning

confidence: 99%

Empirical relationships between compressive and flexural strength of concrete containing recycled asphalt material for pavement applications using different specimen configurations

Marín-Uribe

Navarro-Gaete

2021

materconstrucc

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The flexural strength of pavement concrete is generally deduced by testing beams or by applying empirical equations. In this investigation, concrete mixtures were manufactured, incorporating 0, 20, 50 and 100% Reclaimed Asphalt Pavement (RAP), by weight, as a replacement for natural aggregates. The compressive strength was measured using cubic specimens and the flexural strength was measured for three types of specimens; beam, semicircular (SCB) and modified beam. This study proposes logarithmic and power equations that allow the estimation of the flexural strength of a concrete mix that incorporates RAP as a function of its compressive strength. Linear or power models are proposed to predict beam flexural strength from SCB specimens and a logarithmic model for modified beam specimens. Statistical analyses show that the proposed prediction models can be considered sufficiently accurate and their use is justified.

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Effect of Recycled Asphalt Pavement (RAP) Aggregates on Strength of Fly Ash-GGBS-Based Alkali-Activated Concrete (AAC)

Sepuri

Hossiney

Chandra

et al. 2022

Advances in Sustainable Materials and Resilient Infrastructure

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Modelling of the adhesion between reclaimed asphalt pavement aggregates and hydrated cement paste

Cited by 26 publications

References 14 publications

Economical Assessment of Recycled Asphalt Pavement (RAP) Aggregate for Structural Concrete Production in Italy

Economical Assessment of Recycled Asphalt Pavement (RAP) Aggregate for Structural Concrete Production in Italy

Empirical relationships between compressive and flexural strength of concrete containing recycled asphalt material for pavement applications using different specimen configurations

Effect of Recycled Asphalt Pavement (RAP) Aggregates on Strength of Fly Ash-GGBS-Based Alkali-Activated Concrete (AAC)

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