A sustainable pavement concrete using warm mix asphalt and hydrated lime treated recycled concrete aggregates

Albayati, Amjad H.; Wang, Yu; Yan, Wei; Haynes, Jonathan

doi:10.1016/j.susmat.2018.e00081

Cited by 38 publications

(24 citation statements)

References 15 publications

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“…When treated with a calcium hydroxide solution, the compound enters the crevices and voids of the aggregate. After contacting with air, calcium hydroxide reacts with carbon dioxide to form solid calcium carbonate, which can fill the voids and improve the strength of the aggregate (Albayati et al, 2018).…”

Section: Effect Of Rca Treatmentmentioning

confidence: 99%

“…Compared with using untreated RCA, RCA treated with hydrated lime effectively reduces the deterioration degree, and the improvement is amplified with high RCA usage rates. Both moisture susceptibility and fatigue life increase with the RCA usage rate, and incorporating treated RCA produces better results than using untreated RCA (Albayati et al, 2018). Cement-stabilized RCA treated with waste oil and asphalt emulsion showed satisfactory performance in strength, stiffness, and shrinkage properties (Zhou et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

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Performance Enhancement of Permeable Asphalt Mixtures With Recycled Aggregate for Concrete Pavement Application

Lei

Luo

et al. 2020

Front. Mater.

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The incorporation of recycled concrete aggregate (RCA) in permeable asphalt mixtures (PAMs) is an efficient method of utilizing construction demolished waste. It not only conforms to the trend of building sponge cities, but also alleviates the problem of overexploitation of natural aggregate resources. As the performance of PAM containing recycled aggregate is not comparable to natural aggregate, modification treatments and the addition of hybrid fibers are adopted as two enhancement methods to improve the performance of PAM with RAC in this study. It is found that replacing natural aggregate with recycled aggregate increases the optimum asphalt content (OAC) but decreases the residual stability. The OAC is increased by 45% when the RCA ratio is 100%, whereas applying silicone resin can give a 16.2% decrease in the OAC. Enhancing RCA with silicone resin can increase the water stability to be comparable with natural aggregate. Moreover, with modification treatment using calcium hydroxide solution, the mechanical strength of PAM is enhanced to even higher than that of natural coarse aggregate mixture alone. Improvements in both mechanical strength and water stability are also achieved by strengthening recycled aggregate with cement slurry, although the performance is less effective than using silicone resin. With the increase in the content of RCA, the permeability coefficients of PAM first decrease and then exhibit an increasing trend. The results indicate that the PAM with RCA and modification treatments can perform satisfactorily as a pavement material in practice. Applying probable modification, PAM incorporating RCA meets the criteria for use in concrete pavement applications.

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Section: Effect Of Rca Treatmentmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Performance Enhancement of Permeable Asphalt Mixtures With Recycled Aggregate for Concrete Pavement Application

Lei

Luo

et al. 2020

Front. Mater.

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“…Thus far, great efforts have been made to use recycled wastes as alternative aggregates for producing asphalt concrete. These wastes include crushed glass, recycled aggregate from demolished concrete, discarded ceramics, and steel slag [5][6][7][8][9][10][11][12][13][14][15][16]. Local workshops and factories produce a considerable amount of iron filing waste (IFW) across the world.…”

Section: Introductionmentioning

confidence: 99%

Influence of Iron Filing Waste on the Performance of Warm Mix Asphalt

et al. 2021

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Recently, interest in the use of projectiles in research on recycling waste materials for construction applications has grown. Using recycled materials for the construction of asphalt concrete pavement, in the meantime, has become a topic of research due to its significant benefits, such as cost savings and reduced environmental impacts. This study reports on comprehensive experimental research conducted using a typical mechanical milling waste, iron filing waste (IFW), as an alternative fine aggregate for warm mix asphalt (WMA) for pavement wearing surface applications. A type of IFW from a local machine workshop was used to replace the conventional fine aggregate, fine natural sand (FNS), at percentages of 25%, 50% 75%, and 100% by the weight of FNS of the size passing sieve No. 50. Experimental tests were conducted on the mixes to compare their Marshall properties, resilient moduli, rutting and fatigue resistance, and moisture susceptibility. Finally, a performance analysis was carried out using the VESYS 5W software on the constructed pavement using the IFW mixes. Both the experiment and the modeling work demonstrated that IFW can be an effective alternative resource for replacing natural fine aggregate in WMA concrete and provided details on the optimum rate based on the comprehensive data obtained first hand.

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“…In term of stiffness, contrasting results have been found. Some research studies have found that the addition of RCA decreases the stiffness of the mixtures when the replacement is made in the coarse fraction of NA (Cupo-Pagano et al 1994, Albayati et al 2018. However, when the fine fraction of NA is replaced by fine RCA, no influence on stiffness has been reported (Arabani andAzarhoosh 2012, Pasandín andPérez 2015).…”

Section: Introductionmentioning

confidence: 99%

Life cycle assessment of hot mix asphalt with recycled concrete aggregates for road pavements construction

Santos

Martínez-Arguelles

2020

International Journal of Pavement Engineering

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In this study a comparative life cycle assessment (LCA) was conducted according to a 'cradle-to-laid' approach to evaluate the potential environmental impacts related to the use of recycled concrete aggregates (RCAs) as a partial replacement of coarse natural aggregates in the production of Hot Mix Asphalt (HMA). Specifically, three percentages of RCA replacements were analyzed: 15, 30 and 45%. Primary data collected mainly through surveys performed in Colombian contractors from the region of Barranquila were used to model the foreground system. The SimaPro 8.4.0 software was used for modelling the processes analyzed in the case study and all the life cycle inputs and outputs related to the functional unit were characterised during life cycle impact assessment (LCIA) phase into potential impacts according to the TRACI v.2.1 impact assessment methodology. The results of the case study showed that the mixtures incorporating 15 and 30% of RCA can be considered as eco-friendly alternatives to the conventional mixture (i.e. no RCA content), as both allow reductions in all impact categories scores. On the contrary, the mixture that contains 45% of RCA denoted a lower environmental performance than that of the conventional mixture.

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A sustainable pavement concrete using warm mix asphalt and hydrated lime treated recycled concrete aggregates

Cited by 38 publications

References 15 publications

Performance Enhancement of Permeable Asphalt Mixtures With Recycled Aggregate for Concrete Pavement Application

Performance Enhancement of Permeable Asphalt Mixtures With Recycled Aggregate for Concrete Pavement Application

Influence of Iron Filing Waste on the Performance of Warm Mix Asphalt

Life cycle assessment of hot mix asphalt with recycled concrete aggregates for road pavements construction

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