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- W3204255379 abstract "This research investigated development of ground bottom ash (GBA) for a new geopolymer material. The compressive strength and porosity of the geopolymer mortar containing GBA were tested. The GBA-based geopolymer mortar mixtures were designed by control liquid to GBA ratio for all tests. Extra water was also used to maintain the workability of geopolymer mortar. The sodium hydroxide (NaOH) concentrations of 10 M and 15 M were used. Furthermore, sodium silicate (Na2SiO3) to sodium hydroxide (NaOH) ratios by mass such as 0.50, 1.50 and 2.50 were also used as alkali activator solutions. Effects of delay time and no-delay time, heat curing as well as the concentrations of NaOH and Na2SiO3 to NaOH ratios on compressive strength and porosity of the GBA geopolymer mortar were investigated. It was found that the increasing of NaOH concentration and Na2SiO3 to NaOH ratio reduce the workability of GBA geopolymer mortar. The high concentration of NaOH at 15 Molar gave the compressive strength at 1 day higher than that of GBA geopolymer mortar with low NaOH of 10 M. Furthermore, the GBA geopolymer mortar with high Na2SiO3 to NaOH ratio at 2.5 gave the highest compressive strength. 15 M-2.5 Si/Na mortar with delay time before heat curing at 75℃ gave the highest compressive strength of 23.0 MPa at 1 day. Moreover, the porosity of GBA geopolymer mortar was related to its compressive strength. The GBA binder is a new geopolymer material with good properties for concrete work." @default.
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- W3204255379 date "2021-09-28" @default.
- W3204255379 modified "2023-10-14" @default.
- W3204255379 title "Effects of delay time and curing temperature on compressive strength and porosity of ground bottom ash geopolymer mortar" @default.
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- W3204255379 doi "https://doi.org/10.55713/jmmm.v31i3.1186" @default.
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