Evaluation of Mechanical Properties of Concrete Containing Recycled Concrete Aggregate and Recycled Asphalt Pavement

Soltanabadi, Reza; Behfarnia, Kiachehr

doi:10.1061/(asce)mt.1943-5533.0004514

Cited by 5 publications

(3 citation statements)

References 27 publications

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“…The comparison of compressive and flexural strength reached by admixtures containing recycled aggregate made of precast concrete and RAP showed that the results of precast concrete were better than RAP or natural aggregate ones [31]. When comparing recycled concrete aggregate (RCA) concrete with RAP concrete, the literature results were almost unanimous in registering a decrease in compressive strength and modulus of elasticity for increasing levels of substitution of both aggregates, albeit a higher decrease was registered for RAP [45]. With respect to the results obtained for large specimens, it was observed that load-deflection curves of RAP deep beams were completely different than those of NCA and RCA, and the absorbed energy of NA and RCA deep beams was almost identical, but for RAP deep beams, the absorbed energy was higher.…”

Section: Introductionmentioning

confidence: 99%

“…From the analysis of the previous studies emerges the necessity of a more conspicuous number of works focusing on the evaluation of RAP aggregate concrete properties [46] and on the methods necessary to guarantee consistent performance, being the latter strongly affected by the quality of recycled aggregates [45]. Nevertheless, from the previously reported results, RAP aggregate seems to be a promising candidate for coarse aggregate substitution, especially if mechanically treated.…”

Section: Introductionmentioning

confidence: 99%

“…Nevertheless, from the previously reported results, RAP aggregate seems to be a promising candidate for coarse aggregate substitution, especially if mechanically treated. Even so, when comparing RAP aggregate behaviour to the performance reached RCA, the first appears to be less competitive [37][38][39][40][45][46][47]. However, RAP aggregate is characterized by a significantly lower environmental impact in terms of energy consumption and emissions related to its production (Table 1).…”

Section: Introductionmentioning

confidence: 99%

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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%

Section: Introductionmentioning

confidence: 99%