A method for preparing foam geopolymer cementitious material from aluminum ash
A technology of geopolymer and cementitious materials, which is applied in the field of preparing foamed geopolymer cementitious materials from aluminum ash slag, can solve the problems of low utilization rate, high cost, heavy environmental burden, etc., and reduce thermal conductivity and curing temperature Low, the effect of reducing the cost of raw materials
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Embodiment 1
[0031] Mix aluminum ash and water at a ratio of 10:1 and wet mill for 120 minutes, sieve with a sieve with an aperture of 1 mm to remove coarse material, and obtain aluminum ash with a particle size of not more than 1 mm and water content, and obtain a water content of 10 after solid-liquid separation and drying. % aluminum ash. Proportioning the dried aluminum ash, blast furnace slag and fly ash, wherein aluminum ash 50wt%, blast furnace slag 10wt%, fly ash 40wt%, the sum of the three is 100%. Add 15wt% alkaline activator and 2wt% foam stabilizer, the alkaline activator is a mixture of sodium hydroxide and water glass ratio of 0.5:1, the foam stabilizer is sodium dodecylbenzenesulfonate and triethanolamine is 1 :1 mixture. The above raw materials were mixed uniformly to obtain a slurry, which was injected into a mold for polymerization and foaming reactions for 10 minutes, sealed at 20° C. for 5 hours, and foamed geopolymer gelling materials were obtained after demoulding. ...
Embodiment 2
[0033] Mix aluminum ash and water at a ratio of 9.5:1 and wet mill for 113 minutes, sieve with a sieve with an aperture of 2 mm to remove the coarse material, and obtain aluminum ash with a particle size of not more than 2 mm and water content. After solid-liquid separation and drying, the water content is 4 % aluminum ash. Proportioning the dried aluminum ash slag, blast furnace slag and fly ash, wherein aluminum ash slag 51wt%, blast furnace slag 11wt%, fly ash 38wt%, the sum of the three is 100%. Add 17wt% alkaline activator and 4wt% foam stabilizer, the alkaline activator is a mixture of sodium hydroxide and water glass ratio of 0.54:1, the foam stabilizer is sodium dodecylbenzenesulfonate and triethanolamine is 1 :1 mixture. The above raw materials were mixed evenly to obtain a slurry, which was injected into a mold for polymerization and foaming for 12 minutes, sealed at 30° C. for 8 hours, and foamed geopolymer gelling material was obtained after demoulding.
Embodiment 3
[0035] Mix aluminum ash and water at a ratio of 9:1 and wet mill for 106 minutes, sieve with a sieve with an aperture of 1.5mm to remove the coarse material, and obtain aluminum ash with a particle size of not more than 1.5mm and water content, and obtain the water content after solid-liquid separation and drying. 8% aluminum ash. Proportioning the dried aluminum ash slag, blast furnace slag and fly ash, wherein aluminum ash slag 55wt%, blast furnace slag 12wt% and fly ash 33wt%, the sum of the three is 100%. Add 14wt% alkaline activator and 1wt% foam stabilizer, the alkaline activator is a mixture of sodium hydroxide and water glass with a ratio of 1:1, and the foam stabilizer is sodium dodecylbenzenesulfonate and triethanolamine at a ratio of 1 :1 mixture. The above-mentioned raw materials were mixed uniformly to obtain a slurry, which was injected into a mold for polymerization and foaming reactions for 25 minutes, sealed at 40° C. for 10 hours, and foamed geopolymer gelli...
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