Utilize este identificador para referenciar este registo:
https://hdl.handle.net/1822/58467
Título: | Concrete with fine and coarse recycled aggregates: E-modulus evolution, compressive strength and non-destructive testing at early ages |
Autor(es): | Velay-Lizancos, Mirian Martinez-Lage, Isabel Azenha, Miguel Granja, José Luís Duarte Vazquez-Burgo, Pablo |
Palavras-chave: | Recycled aggregate E-modulus Non-destructive test Electrical conductivity Green concrete Maturity |
Data: | Dez-2018 |
Editora: | Elsevier |
Revista: | Construction and Building Materials |
Citação: | Velay-Lizancos, M., Martinez-Lage, I., Azenha, M., Granja, J., & Vazquez-Burgo, P. (2018). Concrete with fine and coarse recycled aggregates: E-modulus evolution, compressive strength and non-destructive testing at early ages. Construction and Building Materials, 193, 323-331 |
Resumo(s): | The combined use of fine and coarse recycled aggregates in the manufacture of concrete has multiple advantages from the economic and environmental points of view. There is a lack of knowledge about the behavior of concretes containing recycled aggregates, manifested by strong limitations (even prohibitions) in international standards for structural purposes. This paper aims to study the influence of fine and coarse recycled aggregate of concrete (jointly), with particular emphasis on the evolution of the kinetics of E-Modulus and its relationship with compressive strength and non-destructive testing. Concretes with different degrees of replacement of natural aggregates by recycled aggregates were studied: 0% (reference concrete), 8%, 20% and 31% of the total amount of aggregates. E-Modulus Measurement through Ambient Response Method (EMM-ARM) was used to monitoring the E-Modulus evolution. We also studied the influence of these recycled aggregates on the correlation between E-Modulus and compressive strength, as well as with two non-destructive testing techniques: Ultrasonic Pulse Velocity, and electrical conductivity. The activation energy of the studied concretes, based on data computed from compressive strength measurements at different curing temperatures was calculated. We observed a negative influence of recycled aggregate on the evolution of E-Modulus from the first 12 h, compared to the reference mixture. The crossover effect on E-Modulus evolution produced by high curing temperatures affects more to the concretes with recycled aggregate. Our data evidenced that the maturity correction for E-Modulus evolution, based on the activation energy of compressive strength, produced accurate superposition of E-modulus in the equivalent age domain |
Tipo: | Artigo |
URI: | https://hdl.handle.net/1822/58467 |
DOI: | 10.1016/j.conbuildmat.2018.10.209 |
ISSN: | 0950-0618 |
Versão da editora: | https://www.sciencedirect.com/science/article/pii/S0950061818326266 |
Arbitragem científica: | yes |
Acesso: | Acesso restrito autor |
Aparece nas coleções: | ISISE - Artigos em Revistas Internacionais |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
---|---|---|---|---|
[58].pdf Acesso restrito! | 1,08 MB | Adobe PDF | Ver/Abrir |