Alkali-activated aerated blends: interaction effect of slag with low and high calcium fly ash
Kumar, E. Muthu; Perumal, Priyadharshini; Ramamurthy, K. (2022-05-07)
Springer
07.05.2022
Kumar, E.M., Perumal, P. & Ramamurthy, K. Alkali-activated aerated blends: interaction effect of slag with low and high calcium fly ash. J Mater Cycles Waste Manag 24, 1378–1395 (2022). https://doi.org/10.1007/s10163-022-01434-5
https://rightsstatements.org/vocab/InC/1.0/
© Springer Japan KK, part of Springer Nature 2022. This is a post-peer-review, pre-copyedit version of an article published in Journal of Material Cycles and Waste Management. The final authenticated version is available online at: https://doi.org/10.1007/s10163-022-01434-5
https://rightsstatements.org/vocab/InC/1.0/
© Springer Japan KK, part of Springer Nature 2022. This is a post-peer-review, pre-copyedit version of an article published in Journal of Material Cycles and Waste Management. The final authenticated version is available online at: https://doi.org/10.1007/s10163-022-01434-5
https://rightsstatements.org/vocab/InC/1.0/
Julkaisun pysyvä osoite on
https://urn.fi/URN:NBN:fi:oulu-202405304100
https://urn.fi/URN:NBN:fi:oulu-202405304100
Tiivistelmä
Abstract
This paper reports the influence of the addition of slag in a fly ash-based alkali-activated aerated system, using both Class-F and Class-C fly ash. The factors considered in this study are dosage of aluminium powder as an aerating agent, dosage of slag as co-binder, the molarity of NaOH as an alkaline activator and curing temperature. The incorporation of ground granulated blast furnace slag (GGBS) as secondary binder affects the fresh properties like aeration rate, setting time and flow which can be related to the microstructural development and mechanical properties at later ages. Interestingly, AAM with a binary blend of Class-F fly ash and slag results in higher strength to density ratio., i.e. for a dry density of 1000–1200 kg/m3, a compressive strength value of 20–25 MPa can be achieved with this binary blend combination of aerated concrete.
This paper reports the influence of the addition of slag in a fly ash-based alkali-activated aerated system, using both Class-F and Class-C fly ash. The factors considered in this study are dosage of aluminium powder as an aerating agent, dosage of slag as co-binder, the molarity of NaOH as an alkaline activator and curing temperature. The incorporation of ground granulated blast furnace slag (GGBS) as secondary binder affects the fresh properties like aeration rate, setting time and flow which can be related to the microstructural development and mechanical properties at later ages. Interestingly, AAM with a binary blend of Class-F fly ash and slag results in higher strength to density ratio., i.e. for a dry density of 1000–1200 kg/m3, a compressive strength value of 20–25 MPa can be achieved with this binary blend combination of aerated concrete.
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