Life cycle costs and impacts of massive slabs with varying concrete cover

Barreto, Maria Fernanda Fávero Menna; Timm, Janaine Fernanda Gaelzer; Passuello, Ana; Molin, Denise Carpena Coitinho Dal; Masuero, João Ricardo

doi:10.1016/j.clet.2021.100256

Cited by 5 publications

(8 citation statements)

References 24 publications

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“…The evaluations show an increase in fiber reinforced slabs direct costs which could be offset by a reduction in construction time and, as a result, time-dependent expenses (13) . From prospect of sustainability and operational costs, according to the findings, increasing the thickness of the concrete cover enhances structural durability, reduces costs and environmental consequences, thereby increasing predicted service life and contributing to more sustainable buildings (14) . Another study suggested the application of agile project management for projects in Saudi Arabia.…”

Section: Related Studiesmentioning

confidence: 99%

Investigation of Impact of Span Length and Variable Live Loading Conditions on Flat Slab Material Costs

Jari¹,

Abdulghafour²

2023

IJST

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Objectives: This study investigates the optimization of reinforced concrete flat slabs and establishes a relationship between span, live load, and material costs. Methods: The study used the direct design method per Saudi Building Code limitations, iterative design, and pattern search methods to establish a mathematical model that prescribes the span-cost relationship. The study conducted variable live loading tastings and cost estimates on multiple flat slab panels with distinct dimensions. Findings: The results showed that slab material unit cost increases significantly with span while live load had little impact. Material costs included concrete, steel, and forms which compose 36%, 52%, and 12%, respectively of the total. Each increment in span by 1 meter raises slab material unit cost by 19% starting form 4 meters span as a baseline. Increasing live load by 1 kN/m 2 increase cost by roughly 2% for square panels and 1% for rectangular ones. However, results proved that using 1:1 panel dimension is more economical than panels with 2:1 ratio. Novelty: The study provided a mathematical model to estimate flat slab cost more accurately in preliminary estimations before the design phase.

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Section: Related Studiesmentioning

confidence: 99%

Investigation of Impact of Span Length and Variable Live Loading Conditions on Flat Slab Material Costs

Jari¹,

Abdulghafour²

2023

IJST

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“…Void slabs are typically categorized into one-way void slabs, utilizing lightweight hollow pipes, and biaxial void slabs employing hollow bodies, depending on the method of constructing the voids [23][24][25][26]. Two-way voided slabs have garnered significant attention as a promising technological advancement aligning with contemporary objectives such as sustainable development, circular economy promotion, and carbon dioxide emission reduction [22,26,27]. Several reports suggest that the adoption of void slabs, which involve a reduced amount of concrete and incorporation of recycled materials for void formers, can align with the objectives outlined in building environmental assessment methodologies such as BREEAM and LEED [21,22,27,28].…”

Section: Introductionmentioning

confidence: 99%

“…Two-way voided slabs have garnered significant attention as a promising technological advancement aligning with contemporary objectives such as sustainable development, circular economy promotion, and carbon dioxide emission reduction [22,26,27]. Several reports suggest that the adoption of void slabs, which involve a reduced amount of concrete and incorporation of recycled materials for void formers, can align with the objectives outlined in building environmental assessment methodologies such as BREEAM and LEED [21,22,27,28]. Moreover, void slab structures are expected as potential solutions to societal issues like inter-floor noise in densely populated high-rise residential settings such as apartments and high-rise buildings [17,[29][30][31].…”

Section: Introductionmentioning

confidence: 99%

Shear Reinforcement Effectiveness of One-Way Void Slab with the Hollow Core Ratio and Shear Reinforcement

Cho,

Na,

2024

Applied Sciences

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Void slabs offer a promising solution for sustainable construction due to their reduced weight and potential for recycled materials. However, their inherent hollowness can compromise shear capacity compared to solid slabs. This study investigates the effectiveness of shear reinforcement in mitigating this vulnerability. Experimental testing with a four-point support loading confirmed shear failure in all specimens and revealed a significant reserve of shear strength exceeding predictions from ACI 318-14 by at least 1.436. This suggests the potential for more efficient designs that utilize less shear reinforcement while maintaining structural integrity. An inverse relationship between porosity and shear strength was observed, highlighting the importance of considering void content during design. Among established design codes (ACI 318-14, UBC 2, and CEB-FIP 1990), CEB-FIP 1990 provided the most accurate prediction of shear capacity for these reinforced hollow slabs. These findings offer valuable insights for optimizing the shear design of voided slabs. The observed strength reserve suggests the potential for reduced shear reinforcement while maintaining safety. Additionally, the influence of porosity and the code comparison provide crucial considerations for future design practices. This research paves the way for developing efficient and safe voided slab applications, promoting sustainability in the construction industry.

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“…Although this can prevent air filtration, it will undoubtedly increase the cost of making impermeable slabs. The durability of the roof slab can also be increased by increasing the thickness of the concrete cover [6].…”

Section: Introductionmentioning

confidence: 99%

Mechanical and Microstructural Properties of Green Roof Slab Under Acid Rain Attack

Ahmad

Pertiwi

Taufieq

2023

IOP Conf. Ser.: Earth Environ. Sci.

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A flat slab is widely used as an alternative form of a house roof. The roof work does not take long. Its simple structure is beautiful to homeowners with a minimalist concept. Because this slab does not use a roof covering, it is very susceptible to the influence of the sea. Damage often occurs. Acid rain causes the concrete to become porous as slab material. This investigation aims to produce a durable roof slab to solve existing problems. The test object used was a reinforced concrete slab of 30cmx60cmx15cm. Three types of compressive strength were used, namely 20 MPa, 30 MPa, and 35 MPa. At the same time, the green concrete concept is used by replacing some of the cement with rice husk ash. The effect of acid rain was carried out by immersing the specimens in an acid solution for 28 days, 90 days, and 120 days. All samples were tested for flexural strength for their mechanical properties and XRD for microstructural properties. The results show that the roof slab with rice husk ash can reduce the damage that occurs due to the influence of acid. At the same time, gypsum and calcium oxide content can show the phenomenon of slab damage.

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Life cycle costs and impacts of massive slabs with varying concrete cover

Cited by 5 publications

References 24 publications

Investigation of Impact of Span Length and Variable Live Loading Conditions on Flat Slab Material Costs

Investigation of Impact of Span Length and Variable Live Loading Conditions on Flat Slab Material Costs

Shear Reinforcement Effectiveness of One-Way Void Slab with the Hollow Core Ratio and Shear Reinforcement

Mechanical and Microstructural Properties of Green Roof Slab Under Acid Rain Attack

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