Mechanical and durability performance of sustainable structural concretes: An experimental study

Faella, Ciro; Lima, Carmine; Martinelli, Enzo; Pepe, Marco; Realfonzo, Roberto

doi:10.1016/j.cemconcomp.2016.05.009

Cited by 89 publications

(27 citation statements)

References 22 publications

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“…O superplastificante utilizado foi o Glenium 51, um aditivo a base de policarboxilato com teor de sólidos de 30% e massa específica de 1,087 g/cm 3 . Ele foi utilizado em todas as misturas para controle de trabalhabilidade.…”

Section: 1-materiaisunclassified

“…Por essas razões, nas últimas décadas, diversos grupos de pesquisa estão investigando a possível aplicação de materiais e processos mais sustentáveis destinados a tornar a indústria de concreto mais ecológica e uma das soluções mais promissoras para atingir esse objetivo é a substituição parcial ou total de agregados naturais por reciclados para a produção de concreto estrutural [3], [4], [5]. Os resíduos de demolição de elementos de concreto podem…”

Section: -Introduçãounclassified

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Influência de agregados reciclados de concreto na reologia do concreto

Amario

Pepe

Filho

2018

Libro De Comunicaciones / Livro Das Comunicações

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RESUMOO presente estudo avalia a influência de agregados de resíduo de concreto (ARC) no comportamento reológico de concretos reciclados no estado fresco. De fato, a elevada porosidade dos agregados e sua angularidade modificam a trabalhabilidade dos concretos contendo ARC. Portanto, esse é um estudo preliminar que tem como objetivo estender ferramentas conceituais para concretos contendo agregados reciclados, como por exemplo, o modelo de Bingham simplificado, cuja aplicação para concretos convencionais já está bem consolidada. Para isso, diferentes ensaios experimentais foram realizados a fim de investigar os efeitos das propriedades dos ARCs no comportamento no estado fresco de concretos reciclados. Os resultados obtidos demonstram que, de fato, os ARCs modificam as propriedades reológicas dos concretos, aumentando a sua trabalhabilidade e diminuindo sua tensão de escoamento. Além disso, suas propriedades são altamente relacionadas com a condição de umidade inicial dos agregados. PALAVRAS-CHAVE: reologia, trabalhabilidade, agregado reciclado de concreto, absorção de água.

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Section: 1-materiaisunclassified

Section: -Introduçãounclassified

Influência de agregados reciclados de concreto na reologia do concreto

Amario

Pepe

Filho

2018

Libro De Comunicaciones / Livro Das Comunicações

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“…The domestic and overseas scholars have studied the durability of concrete under different environmental conditions [8][9][10][11][12][13]. The previous results pointed out that the key affecting factors for the durability of concrete structure are material factor, environmental factor, and construction factor [8,9,14].…”

Section: Introductionmentioning

confidence: 99%

Mechanical and Durability Evaluation of Concrete with Sulfate Solution Corrosion

Feng

Deng

2016

Advances in Materials Science and Engineering

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Concrete material has been a choice for the construction structures, even in the cold regions and saline zone. However, these environmental factors have critical damaging effect on the concrete characters. Consequently, this damage will decrease the servicing time of the concrete construction within this environment. In order to evaluate the durability of concrete, the behavior of concrete specimens under the sulfate solution corrosion attacks was studied in this presented work. Two groups of the specimens were immersed into the sulfate solutions with a concentration of 10% and 20%, respectively. The strength development of the specimens under different immersing time was studied. Based on Fick’s law, a steady diffusion equation for sulfate ions in concrete was presented, and the depth of penetration of the attacking sulfate ions was also determined. Based on the depth of penetration and the definition of damage, a damage model for concrete material is developed and a new equation (strength-time) describing the chemical corrosion concrete material is proposed. Results show that the suggested analytical methods can quantify the damage process of concrete under sulfate attack, and the power laws damage developing formula can be used to describe the damage development of the concrete construction subjected to chemical corrosion.

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“…The replacement of Portland cement by SCMs could significantly minimize the quantity of CO2 released and the energy consumed [3,4]. Furthermore, the addition of SCMs has been found to improve the properties of RAC [5][6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Production of Greener Recycled Aggregate Concretes Using Local Supplementary Cementing Materials

al-Swaidani¹

2017

MOJCE

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In the study, supplementary cementing materials (SCMs) have been added in an attempt to improve the performance of recycled aggregate concrete. The use of such eco-friendly materials could also promote a further greening practice in the concrete industry. The concrete performance was evaluated in terms of mechanical properties and concrete permeability. Mechanical properties investigated include compressive strength and modulus of elasticity of concrete. Water permeability, chloride penetrability have particularly been studied to evaluate the permeability properties. The results revealed that the use of SCMs could improve produce greater compressive and modulus of elasticity than those of the recycled aggregate concrete alone. Further, the results showed that permeability properties of recycled aggregate concrete have significantly been improved with addition of these SCMs. Basaltic aggregates were used for comparison and SEM analysis was employed as well.

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Mechanical and durability performance of sustainable structural concretes: An experimental study

Cited by 89 publications

References 22 publications

Influência de agregados reciclados de concreto na reologia do concreto

Influência de agregados reciclados de concreto na reologia do concreto

Mechanical and Durability Evaluation of Concrete with Sulfate Solution Corrosion

Production of Greener Recycled Aggregate Concretes Using Local Supplementary Cementing Materials

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