Cracking of Reinforced Recycled Concrete Slabs

Stochino, Flavio; Pani, Luisa; Francesconi, Luca

doi:10.3844/sgamrsp.2017.3.9

Cited by 7 publications

(8 citation statements)

References 17 publications

(17 reference statements)

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“…Actually, the greater roughness of RA improves the aggregate interlocking, which produces an increase in tensile strength of concrete. As already shown in other research [49,55], the secant modulus of elasticity of concrete with RA is slightly lower than the one of NC. Compressive strength and secant modulus of elasticity in compression tests were performed, respectively, according to UNI EN 12390-3: 2019 [52] and UNI EN 12390-13: 2013 [53], while splitting tensile strength was obtained following UNI EN 12390-6: 2010 [54].…”

Section: Concrete Mechanical Propertiessupporting

confidence: 79%

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Effect of Parent Concrete on the Performance of Recycled Aggregate Concrete

et al. 2020

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Recycling concrete construction waste is a promising way towards sustainable construction. Indeed, replacing natural aggregates with recycled aggregates obtained from concrete waste lowers the environmental impact of concrete constructions and improves natural resource conservation. This paper reports on an experimental study on mechanical and durability properties of concretes casted with recycled aggregates obtained from two different parent concretes, belonging to two structural elements of the old Cagliari stadium. The effects of parent concretes on coarse recycled aggregates and on new structural concretes produced with different replacement percentages of these recycled aggregates are investigated. Mechanical properties (compressive strength, modulus of elasticity, and splitting tensile strength) and durability properties (water absorption, freeze thaw, and chloride penetration resistance) are experimentally evaluated and analyzed as fundamental features to assess structural concrete behavior. The results show that the mechanical performance of recycled concrete is not related to the parent concrete characteristics. Furthermore, the resistance to pressured water penetration is not reduced by the presence of recycled aggregates, and instead, it happens for the chloride penetration resistance. The resistance to frost–thawing seems not related to the recycled aggregates replacement percentage, while an influence of the parent concrete has been assessed.

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Section: Concrete Mechanical Propertiessupporting

confidence: 79%

Section: Concrete Mechanical Propertiessupporting

confidence: 79%

Effect of Parent Concrete on the Performance of Recycled Aggregate Concrete

et al. 2020

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“…The analysis of the cracking behavior of these materials is important, and in addition to the visual analysis, there are methodologies to determine the cracking load from deflection-load curves in flexural tests [40]. The evolution of the elastic modulus over time is shown in Figure 8.…”

Section: Mechanical Properties Of the Concrete Mixesmentioning

confidence: 99%

“…The evolution of the elastic modulus over time is shown in Figure 8. Among the mixes that use diabase aggregate, it is observed that SCC-DC-FA has the smallest elastic modulus (37 and 40 GPa at The analysis of the cracking behavior of these materials is important, and in addition to the visual analysis, there are methodologies to determine the cracking load from deflection-load curves in flexural tests [40].…”

Section: Mechanical Properties Of the Concrete Mixesmentioning

confidence: 99%

High Performance Self-Compacting Concrete with Electric Arc Furnace Slag Aggregate and Cupola Slag Powder

et al. 2020

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The development of self-compacting concretes with electric arc furnace slags is a novelty in the field of materials and the production of high-performance concretes with these characteristics is a further achievement. To obtain these high-strength, low-permeability concretes, steel slag aggregates and cupola slag powder are used. To prove the effectiveness of these concretes, they are compared with control concretes that use diabase aggregates, fly ash, and limestone supplementary cementitious materials (SCMs, also called fillers) and intermediate mix proportions. The high density SCMs give the fresh concrete self-compacting thixotropy using high-density aggregates with no segregation. Moreover, the temporal evolution of the mechanical properties of mortars and concretes shows pozzolanic reactions for the cupola slag. The fulfillment of the demands in terms of stability, flowability, and mechanical properties required for this type of concrete, and the savings of natural resources derived from the valorization of waste, make these sustainable concretes a viable option for countless applications in civil engineering.

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“…Their structural behavior is complex and is currently being studied. Fatigue [29], punching shear [30][31][32] resistance, aging [33], and cracking properties [34,35] have been discussed in the current literature.…”

Section: Introductionmentioning

confidence: 99%

Reinforced Concrete Slab Optimization with Simulated Annealing

Stochino

López-Gayarre

2019

Applied Sciences

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Featured Application: An optimization method, based on Simulated Annealing, is developed for the design of reinforced concrete slab.Abstract: Flat slabs have several advantages such as a reduced and simpler formwork, versatility, and easier space partitioning, thus making them an economical and efficient structural system. When producing structural components in series, every detail can lead to significant cost differences. In these cases, structural optimization is of paramount relevance. This paper reports on the structural optimization of reinforced concrete slabs, presenting the case of a rectangular slab with two clamped adjacent edges and two simply supported edges. Using the yield lines method and the principle of virtual work, a cost function can be formulated and optimized using simulated annealing (SA). Thus, the optimal distribution of reinforcing bars and slab thickness can be found considering the flexural ultimate limit state and market materials costs. The optimum result was defined by the orthotropic coefficient k = 8, anisotropic coefficient g = 1.4, and slab thickness H = 11.8 cm. A sensitivity analysis of the solution was developed considering different material costs.

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Cracking of Reinforced Recycled Concrete Slabs

Cited by 7 publications

References 17 publications

Effect of Parent Concrete on the Performance of Recycled Aggregate Concrete

Effect of Parent Concrete on the Performance of Recycled Aggregate Concrete

High Performance Self-Compacting Concrete with Electric Arc Furnace Slag Aggregate and Cupola Slag Powder

Reinforced Concrete Slab Optimization with Simulated Annealing

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