Geopolymer composition and method for producing the same, geopolymer cured body and method for producing the same, and kit for preparing geopolymer composition

Abstract

To provide a kit for preparing a geopolymer composition which offers a balance of excellent strength development and excellent safety.SOLUTION: Provided is a kit for preparing a geopolymer composition, comprising a first package containing a solid composition and a second package containing a liquid composition, wherein the solid composition comprises: a carbonate alkali containing at least one selected from the group consisting of potassium carbonate, sodium carbonate, potassium bicarbonate, and sodium bicarbonate; silica fume; an inorganic filler comprising fly ash and finely ground blast furnace slag; and a retarder, and the liquid composition comprises: an alkali hydroxide containing at least one selected from the group consisting of sodium hydroxide and potassium hydroxide; and water, wherein the content of the alkali hydroxide is 5 mass% or less, and further comprises a water-reducing agent and a defoaming agent, and the retarder contains at least one selected from the group consisting of an alkali metal phosphate and an alkali metal citrate.SELECTED DRAWING: None

Claims

1. A kit for preparing a geopolymer composition, comprising a first package containing a solid composition and a second package containing a liquid composition, The solid composition comprises: The composition comprises an alkali carbonate containing at least one selected from the group consisting of potassium carbonate, sodium carbonate, potassium hydrogen carbonate, and sodium hydrogen carbonate, silica fume (SF), an inorganic filler (F) containing fly ash and ground granulated blast furnace slag, and a retarder (Re), The liquid composition comprises: The present invention comprises an alkali hydroxide including at least one selected from the group consisting of sodium hydroxide and potassium hydroxide, and water, and the content of the alkali hydroxide is 5% by mass or less, A water reducing agent (Ad) and a defoamer (DF) are contained in at least one of the solid composition and the liquid composition, The kit for preparing a geopolymer composition, wherein the retarder (Re) contains at least one of an alkali metal phosphate and an alkali metal citrate.

2. The kit for preparing a geopolymer composition according to claim 1, wherein the total content of the alkali metal phosphate and the alkali metal citrate relative to the inorganic filler (F) is 0.05 to 5% by mass.

3. The kit for preparing a geopolymer composition according to claim 1 or 2, wherein the molar ratio of the total of the alkali metals contained in the alkali hydroxide and the alkali carbonate to the water is 0.01 or more and less than 0.

20.

4. The ratio of the alkali metal contained in the alkali carbonate to the total alkali metal contained in the alkali hydroxide and the alkali carbonate is 20 to 90%. Kit for preparing a geopolymer composition according to claim 1 or 2.

5. A geopolymer composition obtained by mixing the solid composition and the liquid composition in the geopolymer composition preparation kit according to at least claim 1 or 2.

6. A geopolymer hardened body obtained by hardening a blend of the solid composition and the liquid composition in the geopolymer composition preparation kit according to at least claim 1 or 2.

7. a first preparation step of preparing a solid composition comprising an alkali carbonate containing at least one selected from the group consisting of potassium carbonate, sodium carbonate, potassium hydrogen carbonate and sodium hydrogen carbonate, silica fume (SF), an inorganic filler (F) containing fly ash and ground granulated blast furnace slag, and a retarder (Re); A second preparation step of preparing a liquid composition containing water and an alkali hydroxide containing at least one selected from the group consisting of sodium hydroxide and potassium hydroxide, and the content of the alkali hydroxide is 5 mass% or less; and A blending step of blending at least the solid composition and the liquid composition to obtain a geopolymer composition; A water reducing agent (Ad) and a defoamer (DF) are contained in at least one of the solid composition and the liquid composition, The method for producing a geopolymer composition, wherein the retarder (Re) contains at least one of an alkali metal phosphate and an alkali metal citrate.

8. The method for producing a geopolymer composition according to claim 7, wherein the total content of the alkali metal phosphate and the alkali metal citrate relative to the inorganic filler (F) is 0.05 to 5% by mass.

9. The method for producing a geopolymer composition according to claim 7 or 8, wherein the molar ratio of the alkali metal contained in the alkali hydroxide and the alkali carbonate to the water is 0.01 or more and less than 0.

20.

10. The method for producing a geopolymer composition according to claim 7 or 8, wherein the ratio of the alkali metal contained in the alkali carbonate to the total alkali metal contained in the alkali hydroxide and the alkali carbonate is 20 to 90%.

11. A method for producing a geopolymer hardened body, comprising a hardening step of hardening the geopolymer composition produced by the manufacturing method according to claim 7 or 8.

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