TH9259Y - Geopolymer materials derived from a mixture of fly ash and biomass ash from fluidized bed combustion, combined with fly ash from coal combustion and gypsum. - Google Patents

Abstract

DC60 (June 29, 2012) Geopolymer materials and their fabrication processes from fluidized bed fly ash and biomass ash from pulverized coal combustion combined with fly ash from coal combustion and gypsum. This invention comprises fluidized bed fly ash, fluidized bed biomass ash, pulverized coal fly ash, gypsum, sodium hydroxide, sodium silicate, and sand. The resulting geopolymer material exhibits good compressive strength and physical properties, making it suitable for concrete and structural applications, as well as potential applications in the construction industry. Geopolymer materials and their fabrication processes from fluidized bed fly ash and biomass ash from pulverized coal combustion combined with fly ash from coal combustion and gypsum. This invention comprises fluidized bed fly ash, fluidized bed biomass ash, pulverized coal fly ash, gypsum, sodium hydroxide, sodium silicate, and sand. Sodium silicate and sand were used to create this invented geopolymer material. This material exhibits good compressive strength and physical properties, making it suitable for use in concrete and structural work, as well as for applications in the construction industry.

Claims (4)

1. Geopolymer material from fluidized bed combustion fly ash mixed with crushed coal combustion fly ash, with the following composition: - Fluidized bed combustion fly ash: 10.5-21.1% by weight - Sodium silicate solution: 8.4-10.5% by weight - Sodium hydroxide solution: 10.5-12.6% by weight - Sand: 58% by weight 2. Geopolymer material from fluidized bed combustion fly ash mixed with pulverized coal combustion fly ash as per claim 1, which includes: - Fluidized bed biomass combustion ash 0.01-6.3% by weight - Pulverized coal combustion fly ash 0.01-5.3% by weight - Gypsum 0.01-1.1% by weight. The components can be selected individually or in combination. 3. The process for producing geopolymer materials from fluidized bed combustion fly ash mixed with crushed coal combustion fly ash involves the following steps: a. Pour the fluidized bed combustion fly ash into the mixer. b. Add sodium hydroxide to the mixer and mix for 5-10 minutes. c. Add sand to the mixer and mix for 5-10 minutes. d. Then add sodium silicate to the mixer and mix for 5-10 minutes. e. Pour the mixture into molds and shake with a vibrator to remove air bubbles for 10-30 seconds. Then wrap with plastic and leave at room temperature for 1-2 hours. Cure at 40-60°C for 24-48 hours. f. After that, remove the molds and store samples in a humidity-controlled room until the curing period ends and the compressive strength is tested according to ASTM standards. 4. The process for producing geopolymer materials from fluidized bed combustion fly ash mixed with crushed coal combustion fly ash, as per claim 3, where step A includes the addition of fluidized bed biomass ash, crushed coal combustion fly ash, or gypsum, either individually or in combination.