TH13609Y - Geopolymer decorative bricks made from fly ash and concrete waste, and the manufacturing process. - Google Patents

Abstract

------15/12/2560------(OCR) Page 1 of 1. Summary of the Invention: Geopolymer decorative bricks from fly ash and concrete waste. This invention consists of fly ash and concrete waste in a ratio of 80:20 percent by weight, combined with a concentrated alkaline solution. This solution comprises 10 molar sodium hydroxide (NaOH) mixed with a 60:40 percent by weight ratio of sodium silicate (Na2SiO3). The process begins by sieving the fly ash and concrete waste through a 140 µm sieve. Next, the sodium hydroxide (NaOH) is mixed with distilled water to obtain a 10 molar (M) concentration. This mixture is then combined with the sodium silicate (Na2SiO3) solution in a 60:40 percent by weight ratio to obtain an alkali activator solution. This solution was prepared 24 hours before being heated. The sieved fly ash and concrete waste were mixed in a ratio of 80:20 percent by weight. This mixture was then combined with an alkali activator solution in a ratio of 1:0.4. After thorough mixing, the mixture was poured into acrylic molds, wrapped in clear film, and cured at room temperature (27-30°C) for 7-28 days. ------15/12/2017------(OCR) Page 1 of 1. Summary of the Invention: Geopolymer decorative bricks from fly ash and concrete waste, as described in this invention, consist of fly ash and concrete waste in a ratio of 80:20 percent by weight. Combined with a concentrated alkaline solution, consisting of a 10 molar sodium hydroxide (NaOH) solution mixed with a sodium silicate (Na2SiO3) solution in a 60:40 ratio by weight, the process begins by sieving the fly ash and concrete waste through a 140 micrometer sieve. Next, the sodium hydroxide (NaOH) is mixed with distilled water to achieve a concentration of 10 molar (M). This mixture is then combined with the sodium silicate (Na2SiO3) solution in a 60:40 ratio by weight to obtain an alkali activator solution. This solution is prepared 24 hours before use. The sieved fly ash and concrete waste are then mixed in an 80:20 ratio by weight. Finally, this mixture is combined with the alkali activator solution in a 1:0.4 ratio. Once thoroughly mixed, the mixture is poured into acrylic molds. Then wrap with transparent film and cure at room temperature 27-30 degrees Celsius for 7-28 days. ------------ Geopolymer decorative bricks from fly ash and concrete waste, as described in this invention, consist of a ratio of 80:20 percent by weight combined with a concentrated alkaline solution. This solution consists of a 10 molar sodium hydroxide (NaOH) solution mixed with a 60:40 percent by weight sodium silicate (Na2SiO3) solution. The process begins by sieving the fly ash and concrete waste through a 140 (10⁶ m) sieve. Next, the sodium hydroxide (NaOH) is mixed with distilled water to obtain a 10 molar (M) concentration. This is then mixed with the sodium silicate (Na2SiO3) solution in a ratio of 60:40 percent by weight to obtain an alkali activator solution. This solution is prepared for 24 hours before use. The fly ash and sieved concrete waste are mixed in a ratio of 80:20 percent by weight. This mixture is then combined with an alkali activator solution at a ratio of 1:0.4. After thorough mixing, the mixture is poured into acrylic molds, wrapped in clear film, and cured at room temperature (27-30°C) for 7-28 days.

Claims (4)

------15/12/2560------(OCR) Page 1 of 1 page. Claims. 1. Geopolymer decorative bricks made from fly ash and concrete waste, consisting of fly ash and concrete waste in a ratio of not less than 80:not more than 20 percent by weight. A concentrated alkaline solution of sodium hydroxide (NaOH) with a concentration of 10 molar is mixed with a sodium silicate (Na2SiO3) solution as a binder between the fly ash and concrete waste in a ratio of 60:40 percent by weight. 2. Geopolymer decorative bricks made from fly ash and concrete waste as per claim 1, where the fly ash and concrete waste have an optimal fly ash:concrete waste ratio of 80:20 percent by weight. 3. Geopolymer decorative bricks made from fly ash and concrete waste, as per claim 1 or 2, consisting of fly ash and concrete waste mixed with a solution obtained by combining concentrated alkali sodium hydroxide (NaOH) and sodium silicate (Na2SiO3) solution in a ratio of 1:0.4. 4. The process for producing geopolymer decorative bricks from fly ash and concrete waste, as per claims 1 to 3, involves the following steps: a. Mix fly ash, concrete waste, and a solution obtained by mixing concentrated alkali, sodium hydroxide (NaOH), and sodium silicate (Na2SiO3) solution. b. Once well mixed, pour the mixture into acrylic molds. c. Wrap the molds in clear plastic and store at 27-30 degrees Celsius for 7-28 days. ------------ ------15/12/2017------(OCR) Page 1 of 1 page Claims 1. Geopolymer decorative bricks made from fly ash and concrete waste, consisting of fly ash and concrete waste in a ratio of not less than 80:not more than 20 percent by weight. A concentrated alkaline solution of sodium hydroxide (NaOH) with a concentration of 10 molar is mixed with a sodium silicate (Na2SiO3) solution as a binder between the fly ash and concrete waste in a ratio of 60:40 percent by weight. 2. Geopolymer decorative bricks made from fly ash and concrete waste as per claim 1, where the fly ash and concrete waste have an optimal fly ash:concrete waste ratio of 80:20 percent by weight. 3. Geopolymer decorative bricks made from fly ash and concrete waste, as per claim 1 or 2, consisting of fly ash and concrete waste mixed with a solution obtained by combining concentrated alkali sodium hydroxide (NaOH) and sodium silicate (Na2SiO3) solution in a ratio of 1:0.4. 4. The process for producing geopolymer decorative bricks from fly ash and concrete waste, as per any one of claims 1 to 3, involves the following steps: a. Mix fly ash, concrete waste, and a solution obtained by mixing concentrated alkali, sodium hydroxide (NaOH), and sodium silicate (Na2SiO3) solution. b. Once well mixed, pour the mixture into acrylic molds. c. Wrap the molds in clear plastic and store at 27-30 degrees Celsius for 7-28 days. ------------ Revised July 14, 2017 1. Geopolymer decorative bricks made from fly ash and concrete waste, consisting of fly ash and concrete waste in a ratio of not less than 80:not more than 20 percent by weight. A concentrated alkaline solution of sodium hydroxide (NaOH) with a concentration of 10 molar is mixed with a sodium silicate (Na2SiO3) solution as a binder between the fly ash and concrete waste in a ratio of 60:40 percent by weight. 2. Geopolymer decorative bricks made from fly ash and concrete waste as per claim 1, where the fly ash and concrete waste have an optimal fly ash:concrete waste ratio of 80:20 percent by weight. 3. Geopolymer decorative bricks made from fly ash and concrete waste, as per claim 1 or 2, consisting of fly ash and concrete waste mixed with a solution obtained by combining concentrated alkali sodium hydroxide (NaOH) and sodium silicate (Na2SiO3) solution in a ratio of 1:0.4. 4. The process for producing geopolymer decorative bricks from fly ash and concrete waste, as described in any one of claims 1 to 3, involves the following steps: a. Mix fly ash, concrete waste, and alkaline solution thoroughly. b. Once well mixed, pour the mixture into acrylic molds. c. Wrap with transparent film and cure at 27-30 degrees Celsius for 7-28 days. 1. Geopolymer decorative bricks made from fly ash and concrete waste, consisting of fly ash and concrete waste in a ratio of fly ash to concrete waste of not less than 80:not more than 20 percent by weight, with a 10 molar alkaline solution used as a binder between the fly ash and concrete waste. 2. Geopolymer decorative bricks made from fly ash and concrete waste as per claim 1, where the fly ash and concrete waste have an optimal fly ash:concrete waste ratio of 80:20 percent by weight. 3. Geopolymer decorative bricks from fly ash and concrete waste, as per claim 1, where a concentrated alkaline solution, namely a 10 molar sodium hydroxide (NaOH) solution, is mixed with a sodium silicate (Na2SiO3) solution in a ratio of 60:40 percent by weight between the sodium hydroxide (NaOH) and sodium silicate (Na2SiO3) solutions. 4. The process for producing geopolymer decorative bricks from fly ash and concrete waste, as described in any one of claims 1 to 3, involves the following steps: a. Mix fly ash, concrete waste, and alkaline solution thoroughly. b. Once well mixed, pour the mixture into acrylic molds. c. Wrap with transparent film and cure at 27-30 degrees Celsius for 7-28 days.