Improved Serviceability and Environmental Performance of One-Way Slabs through the Use of Layered Natural and Recycled Aggregate Concrete
Чланак у часопису (Објављена верзија)
,
© 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
Метаподаци
Приказ свих података о документуАпстракт
Recycled aggregate concrete (RAC), i.e., concrete produced with recycled concrete aggregate
(RCA) has been heavily investigated recently, and the structural design of RAC is entering into
design codes. Nonetheless, the service load deflection behavior of RAC remains a challenge due to
its larger shrinkage and creep, and lower modulus of elasticity. A novel solution to this challenge
is the use of layered concrete, i.e., casting of horizontal layers of di erent concretes. To investigate
the potential benefits and limits of layered concrete, this study contains a numerical parametric
assessment of the time-dependent sustained service load deflections and environmental impacts of
homogeneous and layered NAC and RAC one-way slabs. Four types of reinforced concrete slabs were
considered: homogeneous slabs with 0%, 50% and 100% of coarse RCA (NAC, RAC50 and RAC100,
respectively) and layered L-RAC100 slabs with the bottom and top halves consisting of RAC100 and
NAC, respectively. In... the deflection study, di erent statical systems, concrete strength classes and
relative humidity conditions were investigated. The results showed that the layered L-RAC100 slabs
performed as well as, or even better than, the NAC slabs due to the di erential shrinkage between
the layers. In terms of environmental performance, evaluated using a “cradle-to-gate” Life Cycle
Assessment approach, the L-RAC100 slabs also performed as well as, or slightly better than, the NAC
slabs. Therefore, layered NAC and RAC slabs can be a potentially advantageous solution from both
structural and environmental perspectives.
Кључне речи:
construction sustainability / functionally graded concrete / Life Cycle Assessment / OpenSees / sustained service load / time-dependent deflectionИзвор:
Sustainability, 2020, 12, 10278-Издавач:
- MDPI
Финансирање / пројекти:
- Horizon 2020 research and innovation programme under the Marie Skªodowska-Curie grant agreement no. 836270 and from the United States Department of State through the Fulbright Visiting Scholar Grant “Optimization of Stratified Recycled Concrete Structures Based on Numerical Analyses and Life Cycle Assessment.”
Напомена:
- This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
Институција/група
GraFarTY - JOUR AU - Tošić, Nikola AU - Kurama, Yahya AU - Marinković, Snežana PY - 2020 UR - https://grafar.grf.bg.ac.rs/handle/123456789/3362 AB - Recycled aggregate concrete (RAC), i.e., concrete produced with recycled concrete aggregate (RCA) has been heavily investigated recently, and the structural design of RAC is entering into design codes. Nonetheless, the service load deflection behavior of RAC remains a challenge due to its larger shrinkage and creep, and lower modulus of elasticity. A novel solution to this challenge is the use of layered concrete, i.e., casting of horizontal layers of di erent concretes. To investigate the potential benefits and limits of layered concrete, this study contains a numerical parametric assessment of the time-dependent sustained service load deflections and environmental impacts of homogeneous and layered NAC and RAC one-way slabs. Four types of reinforced concrete slabs were considered: homogeneous slabs with 0%, 50% and 100% of coarse RCA (NAC, RAC50 and RAC100, respectively) and layered L-RAC100 slabs with the bottom and top halves consisting of RAC100 and NAC, respectively. In the deflection study, di erent statical systems, concrete strength classes and relative humidity conditions were investigated. The results showed that the layered L-RAC100 slabs performed as well as, or even better than, the NAC slabs due to the di erential shrinkage between the layers. In terms of environmental performance, evaluated using a “cradle-to-gate” Life Cycle Assessment approach, the L-RAC100 slabs also performed as well as, or slightly better than, the NAC slabs. Therefore, layered NAC and RAC slabs can be a potentially advantageous solution from both structural and environmental perspectives. PB - MDPI T2 - Sustainability T1 - Improved Serviceability and Environmental Performance of One-Way Slabs through the Use of Layered Natural and Recycled Aggregate Concrete SP - 10278 VL - 12 DO - 10.3390/su122410278 ER -
@article{ author = "Tošić, Nikola and Kurama, Yahya and Marinković, Snežana", year = "2020", abstract = "Recycled aggregate concrete (RAC), i.e., concrete produced with recycled concrete aggregate (RCA) has been heavily investigated recently, and the structural design of RAC is entering into design codes. Nonetheless, the service load deflection behavior of RAC remains a challenge due to its larger shrinkage and creep, and lower modulus of elasticity. A novel solution to this challenge is the use of layered concrete, i.e., casting of horizontal layers of di erent concretes. To investigate the potential benefits and limits of layered concrete, this study contains a numerical parametric assessment of the time-dependent sustained service load deflections and environmental impacts of homogeneous and layered NAC and RAC one-way slabs. Four types of reinforced concrete slabs were considered: homogeneous slabs with 0%, 50% and 100% of coarse RCA (NAC, RAC50 and RAC100, respectively) and layered L-RAC100 slabs with the bottom and top halves consisting of RAC100 and NAC, respectively. In the deflection study, di erent statical systems, concrete strength classes and relative humidity conditions were investigated. The results showed that the layered L-RAC100 slabs performed as well as, or even better than, the NAC slabs due to the di erential shrinkage between the layers. In terms of environmental performance, evaluated using a “cradle-to-gate” Life Cycle Assessment approach, the L-RAC100 slabs also performed as well as, or slightly better than, the NAC slabs. Therefore, layered NAC and RAC slabs can be a potentially advantageous solution from both structural and environmental perspectives.", publisher = "MDPI", journal = "Sustainability", title = "Improved Serviceability and Environmental Performance of One-Way Slabs through the Use of Layered Natural and Recycled Aggregate Concrete", pages = "10278", volume = "12", doi = "10.3390/su122410278" }
Tošić, N., Kurama, Y.,& Marinković, S.. (2020). Improved Serviceability and Environmental Performance of One-Way Slabs through the Use of Layered Natural and Recycled Aggregate Concrete. in Sustainability MDPI., 12, 10278. https://doi.org/10.3390/su122410278
Tošić N, Kurama Y, Marinković S. Improved Serviceability and Environmental Performance of One-Way Slabs through the Use of Layered Natural and Recycled Aggregate Concrete. in Sustainability. 2020;12:10278. doi:10.3390/su122410278 .
Tošić, Nikola, Kurama, Yahya, Marinković, Snežana, "Improved Serviceability and Environmental Performance of One-Way Slabs through the Use of Layered Natural and Recycled Aggregate Concrete" in Sustainability, 12 (2020):10278, https://doi.org/10.3390/su122410278 . .