Stiffness Properties of Recycled Concrete Aggregates as Unbound Base and Subbase Materials Under Freeze and Thaw Cycles

Akbaş, Merve; İyisan, Recep; Dayioğlu, Asli Y.; Hatipoğlu, Mustafa

doi:10.1007/s13369-021-05344-w

Cited by 7 publications

(5 citation statements)

References 32 publications

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“…In light of the non-destructive nature of RLTT and the relatively low associated stress levels (Arulrajah et al, 2020;Gidel et al, 2001;Han et al, 2019;Islam et al, 2020), the same specimens were tested to compare the mechanical behavior before and after the freezing-thawing actions. The chosen amount of FT cycles is consistent with previous studies (Bassani and Tefa, 2018;Domitrović et al, 2019;Ghorbani et al, 2020) and sufficient to characterize the response to freeze-thaw durability, which usually levels off after a few repetitions (Akbas et al, 2021;Qu et al, 2019;Rosa et al, 2017;Tian et al, 2019). Water capillary rise was not likely to occur due to the coarse-graded nature of the specimens (Dawson, 2008).…”

Section: Specimen Preparation and Testingsupporting

confidence: 70%

Design and sustainability analyses of road base layers stabilized with traditional and nontraditional additives

Barbieri

Lou

Dyke

et al. 2022

Journal of Cleaner Production

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Section: Specimen Preparation and Testingsupporting

confidence: 70%

Design and sustainability analyses of road base layers stabilized with traditional and nontraditional additives

Barbieri

Lou

Dyke

et al. 2022

Journal of Cleaner Production

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“…In the numerical analysis, the Mohr–Coulomb constitutive equations proposed in Perez et al 93 and Akbas et al 33 for RCA and NA layers based on results obtained from laboratory experiments were used. The PM4Sand constitutive equations developed by Boulanger and Ziotopoulou 92 were used to model the behavior of water-saturated sands under dynamic loads.…”

Section: Numerical Analysismentioning

confidence: 99%

“…In this study, NA and RCA materials, whose properties were determined under laboratory conditions, have no liquefaction potential. Therefore, when earthquake loads were applied to the soil models, the plastic deformation of the base and subbase at high strain levels was modeled using an elastoplastic Mohr–Coulomb model with a failure criterion, as was studied by Mohammadinia et al 99 , and Akbas et al 33 . In addition to this, the material properties of HMA were assumed to be elastic in the pavement section.…”

Section: Numerical Analysismentioning

confidence: 99%

“…Many researchers have studied the potential use of RCA and found it to be satisfactorily applicable to pavement bases and subbases 27 – 30 ; it has been proposed that the performance of pavements with RCA is better than that of pavements with NA 31 – 33 . Moreover, some researchers have evaluated recycled waste materials in terms of dynamic performance with large-scale direct shear tests and dynamic triaxial tests 34 .…”

Section: Introductionmentioning

confidence: 99%

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The effect of RCA pavements on the liquefaction-induced settlement

Akbaş¹,

Subasi²,

İyisan³

2023

Sci Rep

Self Cite

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The use of recycled concrete aggregates (RCA) not only reduces the demand for natural aggregates (NA) but also might improve the behavior of soil under earthquake loading. In this study, the behavior of the pavement constructed using 100% RCA and NA on a sandy soil layer with high liquefaction potential under dynamic loads was investigated by numerical analysis and compared with free field conditions. For this purpose, first, the classical geotechnical properties of 100% RCA and NA materials were obtained, and then the stiffness properties were determined by resilient modulus and permanent deformation tests. In the second stage, three different models were created with pavement with NA and RCA and without pavement on high liquefaction potential sand, and dynamic analyses were carried out by PM4Sand. Numerical analyses show that constructing a subbase and base layers significantly reduces liquefaction-induced settlement on the surface of flexible pavements built on liquefied soils. Moreover, when the case of using RCA instead of NA in the subbase and base layers built on the liquefied soil is examined, the liquefaction-induced settlement values on the surface are obtained either lower or very close. Consequently, this study proposes a new alternative to the use of RCA waste materials instead of NA. It is expected the use of these waste materials will reduce the need for storage space and also reduce the negative environmental effects associated with storage.

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“…However, this trend has implications beyond just extreme weather patterns and bring other concerning situation, such as the concern arising from the possibility that seasonally frozen ground and permafrost covered areas may enter into a dangerous state of a freeze‐thaw alternation. This state can have adverse effects, particularly on the operational safety of critical infrastructure (Akbas & Iyisan, 2023; Gokce et al., 2011).…”

Section: Introductionmentioning

confidence: 99%

Exposure of Global Rail and Road Infrastructures in Future Record‐Breaking Climate Extremes

Wang,

Liu,

Wang

et al. 2024

Earth's Future

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Transport infrastructures built on historical experience are expected to face multiple threats under climate change, especially the continuous interruptive losses and additional maintenance costs caused by more intense or frequent record‐breaking extreme climate events. In this study, we investigated the change in the exposure of global rail and road infrastructures to eight record‐breaking meteorological hazards using the latest Coupled Model Intercomparison Project Phase 6 (CMIP6) climate data, including extreme temperature and extreme precipitation. Our findings suggest that higher extreme heat and increasing thaw‐freezing index ratio pose great threats to global rail and road infrastructures. The expected annual exposures of these two hazards are 4 and 2 times the average exposure level of eight hazards, respectively. Moreover, the exposure rapidly increases due to sharply increasing drought and heavy rain compound events as emissions growth and development accelerate, rising from 7% to 18% in eight hazard exposures. Sustainable and lower radiative forcing pathways would contribute to the exposure mitigation, with the peak exposure of eight hazards under the SSP2‐4.5 and SSP1‐2.6 scenarios averaging 29% and 52% lower, respectively, than that under the SSP3‐7.0, which is an extreme scenario we may be on track for under current global efforts. However, the fact that most areas will still be affected by multiple hazards is probably unavoidable. Thus, in parallel with global efforts to reduce greenhouse gas emissions, we recommend that the transport sector incorporate locally appropriate climate change adaptation strategies to avoid losses induced by record‐breaking extreme climate events.

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Stiffness Properties of Recycled Concrete Aggregates as Unbound Base and Subbase Materials Under Freeze and Thaw Cycles

Cited by 7 publications

References 32 publications

Design and sustainability analyses of road base layers stabilized with traditional and nontraditional additives

Design and sustainability analyses of road base layers stabilized with traditional and nontraditional additives

The effect of RCA pavements on the liquefaction-induced settlement

Exposure of Global Rail and Road Infrastructures in Future Record‐Breaking Climate Extremes

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