Mechanical properties of concrete containing recycled asphalt pavements

Huang, Baoshan; Shu, Xiang; Burdette, Edwin G.

doi:10.1680/macr.2006.58.5.313

Cited by 166 publications

(60 citation statements)

References 12 publications

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“…Recent research studies examined the feasibility of incorporating RAP in Portland cement concrete (Huang et al 2005(Huang et al , 2006. Two gradations of RAP (coarse and fine) materials were considered to replace the fresh aggregate from a control concrete mixture.…”

Section: Introductionmentioning

confidence: 99%

“…While the slump of concrete made with both coarse and fine RAP was higher than that of control mix. The reason could be probably attributed to the asphalt coating around both coarse and fine RAP so that less water could be absorbed by the aggregates (Huang et al 2005(Huang et al , 2006. The strength of concrete made with both coarse and fine RAP decreased the most among the RAP mixtures.…”

Section: Introductionmentioning

confidence: 99%

“…Concrete made with only coarse RAP shows the least reduction in the strength of the RAP concretes and significant increase in toughness. Thus it might be more practical to incorporate a certain portion of coarse RAP to replace coarse aggregate (CA) (Huang et al 2005(Huang et al , 2006.…”

Section: Introductionmentioning

confidence: 99%

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Self-Consolidating Concrete Incorporating High Volume of Fly Ash, Slag, and Recycled Asphalt Pavement

Mahmoud

Ibrahim

El-Chabib

et al. 2013

Int J Concr Struct Mater

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The use of sustainable technologies such as supplementary cementitious materials (SCMs), and/or recycled materials is expected to positively affect the performance of concrete mixtures. However, it is imperative to qualify and implement such mixtures in practice, if the required specifications of their intended application are met. This paper presents the results of a laboratory investigation of self-consolidating concrete (SCC) containing sustainable technologies. Twelve mixes were prepared with different combinations of fly ash, slag, and recycled asphalt pavement (RAP). Fresh and hardened concrete properties were measured, as expected the inclusion of the sustainable technologies affected both fresh and hardened concrete properties. Analysis of the experimental data indicated that inclusion of RAP not only reduces the ultimate strength, but it also affected the compressive strength development rate. The addition of RAP to mixes showed a consistent effect, with a drop in strength after 3, 14, and 28 days as the RAP content increased from 0 to 50 %. However, most of the mixes satisfied SCC fresh properties requirements, including mixes with up to 50 % RAP. Moreover, several mixes satisfied compressive strength requirement for pavements and bridges, those mixes included relatively high percentages of SCMs and RAP.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Self-Consolidating Concrete Incorporating High Volume of Fly Ash, Slag, and Recycled Asphalt Pavement

Mahmoud

Ibrahim

El-Chabib

et al. 2013

Int J Concr Struct Mater

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“…Many studies pertaining to the effects of incorporating RAP on the strength developments reveal regularly that the strength decreases as the replacing proportion of virgin aggregates by RAP increases [8][9][10][11][12][13][14][15][16]22,28,29]. To improve the strength of RAP concrete mix, Singh et al [30] found a viable solution by eliminating the contaminants layers (e.g., airborne dusts attached to surface of RAP) of RAP aggregate.…”

Section: Preparation Of Rapmentioning

confidence: 99%

Development of Mix Designs for Minimally Refined Reclaimed Asphalt Pavement (RAP) Concrete for Florida Concrete Test Road

et al. 2018

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Abstract:The main objective was to develop mix designs for concrete incorporating minimally processed reclaimed asphalt pavement (RAP) materials to be used in the Florida Concrete Test Road. The laboratory program was conducted in two phases. Phase I involved testing of twelve (12) trial mixes to identify feasible mixes which could meet the Florida Department of Transportation (FDOT) specification requirements for pavement concrete. Based on the preliminary test results from the trial mixes, ten (10) production mixes were identified and evaluated more extensively in Phase II to establish the optimum concrete mixes incorporating RAP to be recommended. Concrete mixtures, with 0% to 40% RAP as aggregate replacement and using 20% fly ash and 50% slag as cement replacement, were designed using the optimized aggregate gradation (OAG) technique instead of the American Concrete Institute (ACI) method. Among the RAP concrete evaluated, the 20% RAP concrete mixes with 0%, 20% fly ash, and 50% slag as cement replacement were able to meet Florida Department of Transportation's (FDOT) over-design compressive strength of 29 MPa (4200 psi) at 28 days. Using 20% and 40% RAP in concrete could result in saving in the total cost of aggregate by 9% and 17%, respectively. When the RAP is not refined (e.g., no washing of RAP, and no separating of coarse and fine portions), it is recommended that 20% of RAP can be used as aggregate replacement in pavement concrete.

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“…However, the replacement ratio of recycled aggregates in concrete is limited to a certain value [5]. Huang et al [6], [7], investigated the effects of using RAP in cement concrete by replacing the coarse and fraction of aggregate with the reclaimed asphalt, and found that the mixtures containing recycled aggregate have a lower tensile and compressive strength than the mixture containing virgin aggregates. However, the mixtures containing recycled asphalt concrete showed to have a higher toughness.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the Physical Properties of Unbound Base Layer Containing Recycled Aggregates

Taherkhani¹

2015

IJESD

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Abstract-Construction industry is among the major contributor to the production of solid wastes, which have become a main problem of societies in present days. Asphalt and cement concrete are among the main engineering materials which are wasted in vast quantities every year due to the reconstruction and demolition of highways and buildings. Recycling of these materials would be an efficient measure for protection of environment and preservation of natural resources. In this research, the viability of using crushed waste asphalt and cement concrete as a replacement of primary aggregate in unbound base layer of flexible pavements has been investigated. Different portions of the natural aggregate have been replaced with the recycled materials and the physical properties of each mixture have been investigated. The physical properties including sand equivalent, toughness, water absorption, density, soundness and compaction have been evaluated for the mixtures. The results show that, they have potential to be used in unbound base layer. Inclusion of any amount of recycled cement concrete in unbound aggregate results in a mixture which satisfy the minimum required sand equivalent, toughness and soundness for unbound base.Index Terms-Recycled asphalt concrete, recycled cement concrete, unbound base.

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Mechanical properties of concrete containing recycled asphalt pavements

Cited by 166 publications

References 12 publications

Self-Consolidating Concrete Incorporating High Volume of Fly Ash, Slag, and Recycled Asphalt Pavement

Self-Consolidating Concrete Incorporating High Volume of Fly Ash, Slag, and Recycled Asphalt Pavement

Development of Mix Designs for Minimally Refined Reclaimed Asphalt Pavement (RAP) Concrete for Florida Concrete Test Road

Evaluation of the Physical Properties of Unbound Base Layer Containing Recycled Aggregates

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