Utilize este identificador para referenciar este registo:
https://hdl.handle.net/1822/60386
Título: | Alkali-activated binary mortar based on natural volcanic pozzolan for repair applications |
Autor(es): | Robayo-Salazar, Rafael Jesús, Carlos Mejía de Gutierrez, Ruby Pacheco-Torgal, F. |
Palavras-chave: | Alkali-activated materials Coating mortar Natural volcanic pozzolan Pull-off Repair mortar |
Data: | 2019 |
Editora: | Elsevier 1 |
Revista: | Journal of Building Engineering |
Citação: | Robayo-Salazar R., Jesus C., de Gutierrez R., Pacheco-Torgal F. Alkali-activated binary mortar based on natural volcanic pozzolan for repair applications, Journal of Building Engineering, Vol. 25, Issue 1, pp. 1-17, doi:10.1016/j.jobe.2019.100785, 2019 |
Resumo(s): | The goal of this investigation was evaluate the potential of an alkali-activated binary mortar (AABM), based on a natural volcanic pozzolan (70%) and granulated blast furnace slag (30%), as a repair material. This evaluation focused on its physico-mechanical characterisation (compressive, flexural and splitting tensile strengths; modulus of elasticity; capillary water absorption; and shrinkage) and the measurement of its adherence to three class of OPC concretes (substrates) using pull-off tests. A mixture of NaOH and Na2SiO3 was used as alkaline activator. The compressive and splitting tensile strength of AABM were 34.8?MPa and 2.13?MPa?at 28 days of curing, respectively. Its capillary absorption coefficient and modulus of elasticity were 0.5088?kg/m2h0.5 and 8.66?GPa respectively. The results of the pull-off test demonstrate the adherent nature of the AABM, which was promoted by the strength (quality) of the OPC substrate, with pull-off adherences of 0.75?MPa, 1.14?MPa and 1.24?MPa for class C25/30, C35/45 and C50/60, respectively. According to the results obtained and standard specifications (EN 1504-3), this material can be classified as a class R2-repair mortar. |
Tipo: | Artigo |
URI: | https://hdl.handle.net/1822/60386 |
DOI: | 10.1016/j.jobe.2019.100785 |
ISSN: | 2352-7102 |
Versão da editora: | https://www.sciencedirect.com/science/article/pii/S2352710218309410 |
Arbitragem científica: | yes |
Acesso: | Acesso aberto |
Aparece nas coleções: | C-TAC - Artigos em Revistas Internacionais |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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2999-Salazar__2019.pdf | 1,06 MB | Adobe PDF | Ver/Abrir |