Stress-strain curve of concretes with recycled concrete aggregates: analysis of the NBR 8522 methodology

Gujel, Daniele Artini; Kazmierczak, Cláudio de Souza; Masuero, João Ricardo

doi:10.1590/s1983-41952017000300002

Cited by 2 publications

(2 citation statements)

References 12 publications

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“…Therefore, it is crucial to evaluate the temperature effect on these relationships to explore the thermal resistance of concrete structural members. The stress-strain curve of concrete is mainly constructed of an ascending part, which ends at the compressive strength and the corresponding ultimate strain, and a descending part [25].…”

Section: Stress-strain Relationshipsmentioning

confidence: 99%

Temperature Effect on the Compressive Behavior and Constitutive Model of Plain Hardened Concrete

El‐Zohairy

Hammontree

et al. 2020

Materials

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Concrete is one of the most common and versatile construction materials and has been used under a wide range of environmental conditions. Temperature is one of them, which significantly affects the performance of concrete, and therefore, a careful evaluation of the effect of temperature on concrete cannot be overemphasized. In this study, an overview of the temperature effect on the compressive behavior of plain hardened concrete is experimentally provided. Concrete cylinders were prepared, cured, and stored under different temperature conditions to be tested under compression. The stress–strain curve, mode of failure, compressive strength, ultimate strain, and modulus of elasticity of concrete were evaluated between the ages of 7 and 90 days. The experimental results were used to propose constitutive models to predict the mechanical properties of concrete under the effect of temperature. Moreover, previous constitutive models were examined to capture the stress–strain relationships of concrete under the effect of temperature. Based on the experimental data and the proposed models, concrete lost 10–20% of its original compressive strength when heated to 100 °C and 30–40% at 260 °C. The previous constitutive models for stress–strain relationships of concrete at normal temperatures can be used to capture these relationships under the effect of temperature by using the compressive strength, ultimate strain, and modulus of elasticity affected by temperature. The effect of temperature on the modulus of elasticity of concrete was considered in the ACI 318-14 equation by using the compressive strength affected by temperature and the results showed good agreement with the experimental data.

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Section: Stress-strain Relationshipsmentioning

confidence: 99%

Temperature Effect on the Compressive Behavior and Constitutive Model of Plain Hardened Concrete

El‐Zohairy

Hammontree

et al. 2020

Materials

View full text Add to dashboard Cite

show abstract

“…The elasticity modulus of concrete is a fundamental parameter in concrete structure design because it is possible to predict the structural behavior in service under load action and determine the deformations and displacements distribution [ 12 , 13 ].…”

Section: Introductionmentioning

confidence: 99%

Modulus and Strength of Concretes with Alternative Materials

et al. 2020

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This paper presents a study with concretes produced with natural aggregates, recycled concrete aggregates (RCA) and waste porcelain aggregates (WPA). The study analyzed the influence of recycled aggregates in the mechanical properties of conventional concretes and evaluated the difference between measured and predicted values of elasticity modulus. The incorporation of WPA in concrete showed better mechanical results compared to the concretes produced with RCA. Measured elasticity moduli were lower than moduli predicted by NBR 6118:2014 and fib Model Code 2010, while measured results were greater than values predicted by Eurocode 2:2004 and ACI 318:2014, as expected, which indicated the safety of the latter two standards.

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Stress-strain curve of concretes with recycled concrete aggregates: analysis of the NBR 8522 methodology

Cited by 2 publications

References 12 publications

Temperature Effect on the Compressive Behavior and Constitutive Model of Plain Hardened Concrete

Temperature Effect on the Compressive Behavior and Constitutive Model of Plain Hardened Concrete

Modulus and Strength of Concretes with Alternative Materials

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