Utilize este identificador para referenciar este registo:
https://hdl.handle.net/1822/21819
Título: | Soil stabilisation using alkaline activation of fly ash for self-compacting rammed earth construction |
Autor(es): | Cristelo, Nuno Glendinning, Stephanie Miranda, Tiago F. S. Oliveira, Daniel V. Silva, Rui André Martins |
Palavras-chave: | Soil stabilisation Alkaline activation Fly ash Rammed earth |
Data: | Nov-2012 |
Editora: | Elsevier 1 |
Revista: | Construction and Building Materials |
Resumo(s): | This paper studies the effectiveness of alkaline activation of low-calcium fly ash on the improvement of residual granitic soils to be used on rammed-earth construction. Different liquid:solid ratios, alkali concentrations and Na2O : ash ratios were tested. Effect of calcium hidroxide, sodium chloride and concrete superplasticiser is also reported. Compressive strength up to 7 days at 60ºC was determined. Results show that, in terms of mechanical strength, there is an optimum value for the activator:solids ratio and the alkali concentration, and that a decrease in the Na2O:ash ratio results in strength increase. No improvement was observed with the sodium chloride or the superplasticiser, while the calcium produced only a short term increase in strength. SEM/EDS analysis were used to analyse microstructural development, showing that strength is fairly related to the Si:Al and Na:Si ratios. |
Tipo: | Artigo |
URI: | https://hdl.handle.net/1822/21819 |
DOI: | 10.1016/j.conbuildmat.2012.06.037 |
ISSN: | 0950-0618 |
Versão da editora: | http://dx.doi.org/10.1016/j.conbuildmat.2012.06.037 |
Arbitragem científica: | yes |
Acesso: | Acesso aberto |
Aparece nas coleções: | ISISE - Artigos em Revistas Internacionais |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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2012.Soil stabilisation using alkaline activation of fly ash for self-compacting rammed earth construction.pdf | Artigo | 853,83 kB | Adobe PDF | Ver/Abrir |