ULTRAFINE PARTICLE GROUTING COMPOSITION

Abstract

To provide an ultrafine particle grouting composition which is excellent in dispersibility and dispersion retainability and can be easily injected into minute spaces between particles of grounds, rock cracks, and the like. An ultrafine particle grouting composition comprising ultrafine particle cement, wherein the ultrafine particle grouting composition is at least one selected from the group consisting of the following (i) and (ii): (i) the ultrafine particle grouting composition comprises ultrafine particle cement (A) and a polycarboxylic acid dispersant (C), and the ultrafine particle cement (A) comprises blast furnace slag and gypsum, and

Description

Claims

1. An ultrafine particle grouting composition comprising ultrafine particle cement, wherein the ultrafine particle grouting composition is at least one selected from the group consisting of the following (i) and (ii):(i) the ultrafine particle grouting composition comprises ultrafine particle cement (A) and a polycarboxylic acid dispersant (C), andthe ultrafine particle cement (A) comprises blast furnace slag and gypsum, andthe ultrafine particle cement (A) has 10% by volume or less of particles having a particle diameter of 16 μm or more in powder form of the cement; and(ii) the ultrafine particle grouting composition comprises ultrafine particle cement (B) and a polycarboxylic acid dispersant (D), andthe ultrafine particle cement (B) comprises 2 to 25% by weight of cement clinker containing 5% by weight or less of 3CaO.Al2O3, 74 to 97% by weight of blast furnace slag, and 1 to 5% by weight of gypsum, andthe ultrafine particle cement (B) has 60 to 80% by volume of particles having a particle diameter of 1 to 5 μm in powder form of the cement.

2. The ultrafine particle grouting composition according to claim 1, wherein the ultrafine particle cement (A) contained in the ultrafine particle grouting composition comprises 45 to 97% by weight of the blast furnace slag, 2 to 15% by weight of the gypsum, and 0 to 40% by weight of Portland cement.

3. The ultrafine particle grouting composition according to claim 1, wherein the ultrafine particle cement (A) contained in the ultrafine particle grouting composition has 30% by volume or less of particles having a particle diameter of 2 μm or less.

4. The ultrafine particle grouting composition according to claim 1, wherein the polycarboxylic acid dispersant (C) or (D) comprises a polycarboxylic acid copolymer havinga repeating unit derived from an unsaturated polyalkylene glycol monomer anda repeating unit derived from an unsaturated carboxylic acid monomer.

5. The ultrafine particle grouting composition according to claim 4, wherein the polycarboxylic acid dispersant (C) or (D) comprises a polycarboxylic acid copolymer havinga repeating unit derived from a monomer represented by the formula (1):

6. The ultrafine particle grouting composition according to claim 5, wherein a ratio (Y)/(X) of a molar number (Y) of the monomer represented by the formula (2) to a molar number (X) of the monomer represented by the formula (1) is 2.5 or more in the polycarboxylic acid copolymer contained in the polycarboxylic acid dispersant (C).

7. The ultrafine particle grouting composition according to claim 5, wherein the r in the monomer represented by the formula (1) is an integer of 2 to 100 in the polycarboxylic acid copolymer contained in the polycarboxylic acid dispersant (C).

8. A production method of the ultrafine particle grouting composition of claim 1, wherein the production method comprises a high-speed stirring step of performing mixing and stirring at a peripheral speed of 314 m/min or more.

9. A production method of the ultrafine particle grouting composition of claim 1, wherein the production method comprises a step of: mixing and stirring ultrafine particle cement and water; adding water; and performing stirring again.

10. A production method of the ultrafine particle grouting composition of claim 2, wherein the production method comprises a high-speed stirring step of performing mixing and stirring at a peripheral speed of 314 m/min or more.

11. A production method of the ultrafine particle grouting composition of claim 3, wherein the production method comprises a high-speed stirring step of performing mixing and stirring at a peripheral speed of 314 m/min or more.

12. A production method of the ultrafine particle grouting composition of claim 4, wherein the production method comprises a high-speed stirring step of performing mixing and stirring at a peripheral speed of 314 m/min or more.

13. A production method of the ultrafine particle grouting composition of claim 5, wherein the production method comprises a high-speed stirring step of performing mixing and stirring at a peripheral speed of 314 m/min or more.

14. A production method of the ultrafine particle grouting composition of claim 6, wherein the production method comprises a high-speed stirring step of performing mixing and stirring at a peripheral speed of 314 m/min or more.

15. A production method of the ultrafine particle grouting composition of claim 7, wherein the production method comprises a high-speed stirring step of performing mixing and stirring at a peripheral speed of 314 m/min or more.

16. A production method of the ultrafine particle grouting composition of claim 2, wherein the production method comprises a step of: mixing and stirring ultrafine particle cement and water; adding water; and performing stirring again.

17. A production method of the ultrafine particle grouting composition of claim 3, wherein the production method comprises a step of: mixing and stirring ultrafine particle cement and water; adding water; and performing stirring again.

18. A production method of the ultrafine particle grouting composition of claim 4, wherein the production method comprises a step of: mixing and stirring ultrafine particle cement and water; adding water; and performing stirring again.

19. A production method of the ultrafine particle grouting composition of claim 5, wherein the production method comprises a step of: mixing and stirring ultrafine particle cement and water; adding water; and performing stirring again.

20. A production method of the ultrafine particle grouting composition of claim 6, wherein the production method comprises a step of: mixing and stirring ultrafine particle cement and water; adding water; and performing stirring again.