This paper presents the preliminary results of an experimental research on the influence of heat and steam curing on the performances of one-part alkali-activated mortars based on low calcium fly ash (FA) and ground granulated blast furnace slag (GGBFS) with different GGBFS/FA ratios. The mortars were manufactured at equal water to precursor ratio and were activated by sodium silicate, potassium hydroxide and sodium carbonate in powder form. In general, by growing the GGBFS/FA ratio, the workability of fresh mortars decreases and the elasto-mechanical performance increases, independently of curing conditions. The heat and/or steam curing temperatures equal to 40°C or 60°C promote the development of higher early compressive strength respect to standard curing conditions (20°C), especially at high GGBFS/FA ratios, while no advantages were detected at longer ages.

(2019). The influence of heat and steam curing on the properties of one-part fly ash/slag alkali activated materials: Preliminary results . Retrieved from http://hdl.handle.net/10446/152430

The influence of heat and steam curing on the properties of one-part fly ash/slag alkali activated materials: Preliminary results

Coppola, L.;Coffetti, D.;Crotti, E.;Gazzaniga, G.
2019-01-01

Abstract

This paper presents the preliminary results of an experimental research on the influence of heat and steam curing on the performances of one-part alkali-activated mortars based on low calcium fly ash (FA) and ground granulated blast furnace slag (GGBFS) with different GGBFS/FA ratios. The mortars were manufactured at equal water to precursor ratio and were activated by sodium silicate, potassium hydroxide and sodium carbonate in powder form. In general, by growing the GGBFS/FA ratio, the workability of fresh mortars decreases and the elasto-mechanical performance increases, independently of curing conditions. The heat and/or steam curing temperatures equal to 40°C or 60°C promote the development of higher early compressive strength respect to standard curing conditions (20°C), especially at high GGBFS/FA ratios, while no advantages were detected at longer ages.
2019
Coppola, Luigi; Coffetti, Denny; Crotti, Elena; Dell'Aversano, R.; Gazzaniga, Gabriele
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10446/152430
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