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dc.contributor.authorCristelo, Nunopor
dc.contributor.authorMiranda, Tiago F. S.por
dc.contributor.authorOliveira, Daniel V.por
dc.contributor.authorRosa, Ivopor
dc.contributor.authorSoares, Edgarpor
dc.contributor.authorCoelho, Paulopor
dc.contributor.authorFernandes, Lisetepor
dc.identifier.citationCristelo, N., Miranda, T., Oliveira, D. V., Rosa, I., Soares, E., Coelho, P., & Fernandes, L. (2015). Assessing the production of jet mix columns using alkali activated waste based on mechanical and financial performance and CO2 (eq) emissions. Journal of Cleaner Production, 102, 447-460. doi: 10.1016/j.jclepro.2015.04.102por
dc.description.abstractRecent research has proved the potential of alkaline activated fly-ash for soil stabilisation. However, such studies have not focused on the link between financial, mechanical and environmental aspects of this solution, but only on their absolute mechanical properties. The present paper characterises the mechanical behaviour of a large spectrum of activator-ash-soil combinations used to build jet mixing columns, analysing also the cost and CO2 (eq) emissions. The concern with these two vectors forced a decrease in the quantity of stabilising agent added to the soil, relatively to previous research, and the effects of such low quantities have not yet been published. However, the results clearly showed a significant improve in strength, still well above the average values expected when improving the stressstrain behaviour of a weak soil. Uniaxial compressive strength tests were used to assess the effects of the fly-ash percentage, the alkalieash ratio and the water content. The carbon calculator recently developed by the European Federation of Foundation Contractors and the Deep Foundations Institute was used to quantify the CO2 (eq) emissions associated with this technique. The financial cost was estimated based on the experience of a major Portuguese contractor. For comparison purposes, soil cement mixtures were also analysed, using similar conditions and tools used for the soil-ash analysis. Results showed that the cement and ash solutions are very similar in terms of overall performance, with some advantage of the former regarding financial cost, and a significant advantage of the latter regarding the CO2 (eq) emissions. This new grout, although it is in an embryonic stage, it has the potential for broader developments in the field.por
dc.description.sponsorshipTeixeira Duarte S.A.por
dc.description.sponsorshipPegop e Energia Electrica S.A.por
dc.subjectCO2 productionpor
dc.subjectSoil stabilisationpor
dc.subjectAlkaline activationpor
dc.subjectFinancial analysispor
dc.subjectCO<inf>2</inf> productionpor
dc.subjectCO production 2por
dc.titleAssessing the production of jet mix columns using alkali activated waste based on mechanical and financial performance and CO2 (eq) emissionspor
oaire.citationTitleJournal of Cleaner Productionpor
dc.subject.fosEngenharia e Tecnologia::Engenharia Civilpor
dc.subject.fosEngenharia e Tecnologia::Engenharia do Ambientepor
dc.subject.wosScience & Technologypor
sdum.journalJournal of Cleaner Productionpor
Appears in Collections:ISISE - Artigos em Revistas Internacionais

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