Method for improving early mechanical properties of alkali-activated fly ash cementing material by electric curing
A technology of cementitious materials and fly ash, which is applied in the field of alkali-activated cementitious materials, can solve the problems of low early strength of alkali-activated fly ash products and cannot be demolded in time, and achieve high early strength, low energy consumption and low cost. Effect
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Embodiment 1
[0037]Accurately weigh 300g of the fly ash raw material, take the fly ash mass as the basic mass (100%), the sodium hydroxide content as 10% of the basic mass, and the water consumption as 38% of the basic mass. First, dissolve the solid sodium hydroxide in water and cool to room temperature to prepare an alkali activator solution, then pour the alkali activator solution and fly ash into the cement slurry mixing pot successively, and start the mixer at a slow speed after the stirring pot is fixed. Stir for 2 minutes, then stir rapidly for 3 to 5 minutes, and prepare an alkali-activated gelling material slurry after stirring evenly; put the slurry into a triple plastic mold with electrodes of 3cm (width)×3cm (height)×5cm (length) , vibrated on the plastic sand vibrating table, wrapped it with polyethylene plastic film, placed it at room temperature, inserted the temperature sensor into the clean slurry for temperature detection, and then passed the positive and negative poles of...
Embodiment 2
[0039] Accurately weigh 300g of the fly ash raw material, take the fly ash mass as the basic mass (100%), the sodium hydroxide dosage as 15% of the basic mass, and the water consumption as 38% of the basic mass. First, dissolve the solid sodium hydroxide in water and cool to room temperature to prepare an alkali activator solution, then pour the alkali activator solution and fly ash into the cement slurry mixing pot successively, and start the mixer at a slow speed after the stirring pot is fixed. Stir for 2 minutes, then stir rapidly for 3 to 5 minutes, and prepare an alkali-activated gelling material slurry after stirring evenly; put the slurry into a triple plastic mold with electrodes of 3cm (width)×3cm (height)×5cm (length) , vibrated on the plastic sand vibrating table, wrapped it with polyethylene plastic film, placed it at room temperature, inserted the temperature sensor into the clean slurry for temperature detection, and then passed the positive and negative poles of...
Embodiment 3
[0041] Accurately weigh 300g of the fly ash raw material, take the fly ash mass as the basic mass (100%), the sodium hydroxide content as 20% of the basic mass, and the water consumption as 38% of the basic mass. First, dissolve the solid sodium hydroxide in water and cool to room temperature to prepare an alkali activator solution, then pour the alkali activator solution and fly ash into the cement slurry mixing pot successively, and start the mixer at a slow speed after the stirring pot is fixed. Stir for 2 minutes, then stir rapidly for 3 to 5 minutes, and prepare an alkali-activated gelling material slurry after stirring evenly; put the slurry into a triple plastic mold with electrodes of 3cm (width) × 3cm (height) × 5cm (length) , vibrated on the plastic sand vibrating table, wrapped it with polyethylene plastic film, placed it at room temperature, inserted the temperature sensor into the clean slurry for temperature detection, and then passed the positive and negative pol...
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