Inorganic grouting blocking material

Abstract

The invention discloses an inorganic grouting blocking material, and belongs to the technical field of blocking materials. The inorganic grouting blocking material is prepared from, by mass, 75-90 parts of portland cement clinker, 3-10 parts of slag, 5-15 parts of sulphoaluminate cement, 0.5-4 parts of bentonite, 0.05-0.2 part of hydroxyethyl cellulose ester, 0.25-0.5 part of a water reducing agent, 0.005-0.1 part of lithium carbonate and 0.05-0.5 part of defoaming agent. The blocking material is mainly suitable for grouting leakage blocking of rock and soil layers, is particularly suitable for grouting leakage blocking projects for water burst in dam foundations and other parts, and has the advantages of being good in blocking effect, high in post-blocking strength, good in bonding aggregation performance and not capable of dispersing underground.

Description

technical field

[0001] The invention relates to an inorganic grouting plugging material, which belongs to the technical field of plugging materials. Background technique

[0002] The grouting material is for the purpose of improving the foundation, and plays the role of filling the formation cracks and pores in the foundation and consolidating it. It is a solid formed by grout after a certain chemical or physical reaction. During the grouting process, it changes from liquid phase to solid phase and then to stone body, and is used to fill the cracks or pores in the formation.

[0003] During the construction of the dam foundation of the hydropower station, piping often occurs, and the water inflow is large, so the dam foundation needs to be blocked in time. The direct plugging effect of the commonly used cement slurry is not obvious, which is mainly because the cement solidification time is long, and the cement slurry is diluted by the water flow, which affects its solidific...

Examples

Embodiment 1

[0020] An inorganic grouting plugging material, comprising the following raw materials in parts by weight: 75 parts of Portland cement clinker; 3 parts of slag; 5 parts of sulphoaluminate cement; 0.5 parts of bentonite; 0.05 parts of hydroxyethyl cellulose ether 0.25 parts of water reducing agent; 0.005 parts of lithium carbonate; 0.05 parts of defoamer.

Embodiment 2

[0022] An inorganic grouting plugging material, comprising the following raw materials in parts by weight: 90 parts of Portland cement clinker; 5 parts of slag; 10 parts of sulphoaluminate cement; 2 parts of bentonite; 0.2 parts of hydroxyethyl cellulose ether parts; 0.5 parts of water reducing agent; 0.1 parts of lithium carbonate; 0.5 parts of defoaming agent.

[0023] In this embodiment, the specific surface area of ​​the slag is 400 kg / m3; the sulphoaluminate cement is sulphoaluminate cement with a strength grade of 42.5.

Embodiment 3

[0025] An inorganic grouting plugging material, comprising the following raw materials in parts by weight: 80 parts of Portland cement clinker; 10 parts of slag; 15 parts of sulphoaluminate cement; 4 parts of bentonite; 0.1 parts of hydroxyethyl cellulose ether 0.35 parts of water reducing agent; 0.01 parts of lithium carbonate; 0.35 parts of defoamer.

[0026] In this example, the specific surface area of ​​the slag is 800kg / m3; the sulphoaluminate cement is sulphoaluminate cement with a strength grade of 52.5; the bentonite is sodium-based bentonite, the water absorption is greater than 300%, and the sieve residue of 80 μm is less than 8%. ; The viscosity of hydroxyethyl cellulose ether is 50000mPa·s; the water reducing agent is polycarboxylate water reducing agent, and the water reducing rate is 25%.

technical field

[0001] The invention relates to an inorganic grouting plugging material, which belongs to the technical field of plugging materials. Background technique

[0002] The grouting material is for the purpose of improving the foundation, and plays the role of filling the formation cracks and pores in the foundation and consolidating it. It is a solid formed by grout after a certain chemical or physical reaction. During the grouting process, it changes from liquid phase to solid phase and then to stone body, and is used to fill the cracks or pores in the formation.

[0003] During the construction of the dam foundation of the hydropower station, piping often occurs, and the water inflow is large, so the dam foundation needs to be blocked in time. The direct plugging effect of the commonly used cement slurry is not obvious, which is mainly because the cement solidification time is long, and the cement slurry is diluted by the water flow, which affects its solidific...

Examples

Embodiment 1

[0020] An inorganic grouting plugging material, comprising the following raw materials in parts by weight: 75 parts of Portland cement clinker; 3 parts of slag; 5 parts of sulphoaluminate cement; 0.5 parts of bentonite; 0.05 parts of hydroxyethyl cellulose ether 0.25 parts of water reducing agent; 0.005 parts of lithium carbonate; 0.05 parts of defoamer.

Embodiment 2

[0022] An inorganic grouting plugging material, comprising the following raw materials in parts by weight: 90 parts of Portland cement clinker; 5 parts of slag; 10 parts of sulphoaluminate cement; 2 parts of bentonite; 0.2 parts of hydroxyethyl cellulose ether parts; 0.5 parts of water reducing agent; 0.1 parts of lithium carbonate; 0.5 parts of defoaming agent.

[0023] In this embodiment, the specific surface area of ​​the slag is 400 kg / m3; the sulphoaluminate cement is sulphoaluminate cement with a strength grade of 42.5.

Embodiment 3

[0025] An inorganic grouting plugging material, comprising the following raw materials in parts by weight: 80 parts of Portland cement clinker; 10 parts of slag; 15 parts of sulphoaluminate cement; 4 parts of bentonite; 0.1 parts of hydroxyethyl cellulose ether 0.35 parts of water reducing agent; 0.01 parts of lithium carbonate; 0.35 parts of defoamer.

[0026] In this example, the specific surface area of ​​the slag is 800kg / m3; the sulphoaluminate cement is sulphoaluminate cement with a strength grade of 52.5; the bentonite is sodium-based bentonite, the water absorption is greater than 300%, and the sieve residue of 80 μm is less than 8%. ; The viscosity of hydroxyethyl cellulose ether is 50000mPa·s; the water reducing agent is polycarboxylate water reducing agent, and the water reducing rate is 25%.

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