Compressive strength and microstructure of alkali-activated blast furnace slag/sewage sludge ash (GGBS/SSA) blends cured at room temperature
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Altres documents de l'autoria: Tashima, M. M.; Reig, Lucía; Santini Jr., M.A.; Moraes, J.C.B.; Akasaki, Jorge Luís; PAYÁ, JORDI; Borrachero, Mª Victoria; Soriano, Lourdes
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INVESTIGACIONMetadades
Títol
Compressive strength and microstructure of alkali-activated blast furnace slag/sewage sludge ash (GGBS/SSA) blends cured at room temperatureAutoria
Data de publicació
2017Editor
Springer VerlagISSN
1877-2641; 1877-265XCita bibliogràfica
Tashima, M. M., Reig, L., Santini, M. A., Moraes, J. B., Akasaki, J. L., Payá, J., ... & Soriano, L. (2017). Compressive Strength and Microstructure of Alkali-Activated Blast Furnace Slag/Sewage Sludge Ash (GGBS/SSA) Blends Cured at Room Temperature. Waste and Biomass Valorization, 8(5), 1441-1451.Tipus de document
info:eu-repo/semantics/articleVersió de l'editorial
https://link.springer.com/article/10.1007/s12649-016-9659-1Versió
info:eu-repo/semantics/acceptedVersionParaules clau / Matèries
Resum
In the present work, ground granulated blast furnace slag (GGBS) and sewage sludge ash (SSA) blends
were assessed for the production of alkali-activated pastes and mortars. Percentages of SSA to substitute
GGBS ... [+]
In the present work, ground granulated blast furnace slag (GGBS) and sewage sludge ash (SSA) blends
were assessed for the production of alkali-activated pastes and mortars. Percentages of SSA to substitute
GGBS ranged from 0–30 wt.% and sodium concentrations of 6–10 mol.kg-1 were used for the activating
solutions. Pastes and mortars were cured at 20 ºC for up to 90 days. Raw materials were characterised by
granulometric analysis, XRF, XRD, FTIR and SEM techniques. The replacement percentage of GGBS by
SSA and the sodium hydroxide concentration of the alkaline activator were optimised to produce mortar
with compressive strengths close to 30 MPa after 28 curing days at room temperature. Best results were
obtained in samples blended with 20 wt.% SSA activated with 6 mol.kg-1 NaOH solutions which,
according to the XRD, FTIR and microscopic results, contained higher amounts of (N,C)-A-S-H gel. The
potential use of SSA for the development of alternative cementitious materials at room temperature has
been demonstrated. [-]
Publicat a
Waste and Biomass Valorization, 2017, vol. 8, no 5, p. 1441-1451.Proyecto de investigación
The authors acknowledge FAPESP (processo 2013/25254-5), Santander Universidades (program: “Becas Iberoamérica Jóvenes Profesores Investigadores España 2014”, grant to Lucia Reig), CNPq (nº 14/2013 processo 478057/2013-0) and the scanning electron microscopy services of FEIS/UNESP.Drets d'accés
"This is a post-peer-review, pre-copyedit version of an article published in Waste and Biomass Valorization. The final authenticated version is available online at: https://doi.org/10.1007/s12649-016-9659-1”.
http://rightsstatements.org/vocab/InC/1.0/
info:eu-repo/semantics/openAccess
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info:eu-repo/semantics/openAccess
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