Probabilistic models of concrete compressive strength and elastic modulus with rubber aggregates

Nocera, Fabrizio; Wang, Junsong; Faleschini, Flora; Demartino, Cristoforo; Gardoni, Paolo

doi:10.1016/j.conbuildmat.2021.126145

Cited by 18 publications

(3 citation statements)

References 104 publications

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“…The proposed design equation offers several advantages over existing formulations, including faster and more convenient estimation, elimination of section slenderness calculations, and extended material strength limits for concrete infill and steel tubes. Nocera et al [19] developed probabilistic models to estimate the Strength Reduction Factor (SRF) and Elastic Modulus Reduction Factor (ERF) of rubberized concrete, considering various mix design variables, and three types of rubber aggregates using a Bayesian approach with Markov Chain Monte Carlo simulation. The proposed probabilistic models are employed to assess the reliability of rubberized RC structures, including a column and a one-way slab subjected to compressive axial force and distributed load, respectively.…”

Section: Introductionmentioning

confidence: 99%

Innovative Equivalent Elastic Modulus Based Stress Calculation Methodology for Reinforced Concrete Columns

Şen,

Mangir

2023

Buildings

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The combination of linearity and elasticity assumptions provides classical calculation procedures for the reinforced concrete (RC) columns and beams against internal and external seismic loads. In these calculation procedures, the elasticity modulus of the concrete is taken into account by ignoring the steel reinforcement due to its small area percentage in the total cross-section area. This paper presents an innovative column stress calculation procedure considering the concrete–steel composition as the equivalent elastic modulus based on the classical Hooke’s Law. This methodology takes into consideration also the elastic modulus of the steel, providing a reduction in the factor of safety. The application of the proposed method is presented for a series of RC column cross-section areas. It is observed that the proposed methodology leads to elastic modulus improvement of 6% to 27% compared to conventional calculations. The necessary flow chart for the execution of the proposed process steps and accordingly developed MATLAB program are provided for the application.

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Section: Introductionmentioning

confidence: 99%

Innovative Equivalent Elastic Modulus Based Stress Calculation Methodology for Reinforced Concrete Columns

Şen,

Mangir

2023

Buildings

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“…The RuC is considered an advanced clean production material [15]. The resulting RuC possesses lower strengths than NA concrete [16][17][18][19][20] but enhanced its earthquake endurance, its impact, and its toughness [21]. The air spaces produced by the CR's lower water absorption than NA resulted in extra stresses in the bordering matrix and formed additional cracks [22][23][24][25][26].…”

Section: Introductionmentioning

confidence: 99%

Effect of particle size of the coated and un-coated crumb rubber on the mechanical properties and water absorption of rubberized concrete

Sharaky

2023

Res. Eng. Struct. Mat.

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To diminish the environmental impact of enormous waste tires and reduce the concrete cost, crumb rubber (CR) was utilized to replace concrete aggregates. The CR and sand sizes were sieved and separated. Moreover, the CR was pre-coated with silica fume slurry, having a water-to-cement ratio of 0.55. The coated and uncoated CR was used as a partial replacement of sand by five percentages (0, 5, 10, 20, and 25% by volume). Cubes and cylinders were cast and then cured in water tanks until the date of testing. The compressive strength of the control and rubberized concrete (RuC) samples was measured at 7, 28, and 56 days, the tensile strength was obtained at 28 days, and the water absorption was measured at 56 days. Replacing sand with a 2.36 mm particle size with the same CR size showed lower effects on the concrete compressive strength than replacing sand with 1.18 mm CR. Moreover, replacing sand with 5% pre-coated CR (particle size 1.18 mm) enhanced the compressive strength (fcu) by 104.88, 100.44 and 101.9% at 7, 28, and 56 days, respectively, compared to the subsequent mixes with uncoated CR while at 10% pre-coated CR content, the fcu enhancement was 118.3, 108.53, and 104.80%, respectively.

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“…The use of recycled rubber particles as partial replacements of both coarse and fine aggregates in concrete is considered a sustainable solution to reduce the detrimental impact of rubber waste on the environment [1][2][3]. RuC can be an efficient alternative to conventional concrete materials (CCM) for some applications, although RuC is characterised by a low elastic modulus, compressive capacity and tensile strength in comparison with CCM [4][5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Axial and bending behaviour of steel tubes infilled with rubberised concrete

Mujdeci

Guo

Bompa

et al. 2022

Thin-Walled Structures

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Probabilistic models of concrete compressive strength and elastic modulus with rubber aggregates

Cited by 18 publications

References 104 publications

Innovative Equivalent Elastic Modulus Based Stress Calculation Methodology for Reinforced Concrete Columns

Innovative Equivalent Elastic Modulus Based Stress Calculation Methodology for Reinforced Concrete Columns

Effect of particle size of the coated and un-coated crumb rubber on the mechanical properties and water absorption of rubberized concrete

Axial and bending behaviour of steel tubes infilled with rubberised concrete

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