Slurry with time-variable viscosity and preparation method thereof

Abstract

The invention discloses slurry with time-variable viscosity and a preparation method thereof and belongs to the technical field of grouting. The slurry with time-variable viscosity comprises 10-30 parts of cement, 0.02-0.1 part of a cellulose solvent, 0.5-2 parts of a synthetic calcareous and siliceous early strength agent, 0.05-0.1 part of an amide stability regulator and 5-10 parts of water. The preparation method comprises the following steps: adding water into the synthetic calcareous and siliceous early strength agent and the amide stability regulator for dissolution; then adding the cellulose solvent; finally, respectively adding the dissolved synthetic calcareous and siliceous early strength agent and amide stability regulator to prepare the slurry with time-variable viscosity. When being used for reinforcement of strong-unloading deep tension fracture rock mass and cataclastic rock mass, the slurry with time-variable viscosity has the characteristics that the early strength is quickly increased, and the late strength and the groutability are high.

Description

technical field

[0001] The invention relates to the technical field of grouting, in particular to a time-varying viscosity slurry and a preparation method thereof. Background technique

[0002] Grouting is the use of hydraulic pressure, air pressure or other methods to inject the grout with gelling ability into the cracks, voids or cavities in the rock formation or soil layer through the grouting drill hole or the grouting pipe inserted therein, and combine the moisture and The air is driven away, and the original loose soil particles or cracks are cemented into a whole, forming a "stone body" with new structure, high strength, strong waterproof and anti-seepage performance, and good chemical stability, which has achieved the improvement of rock or soil layers. A construction method for the purpose of performance.

[0003] At present, there are many kinds of grouting materials, mainly cement grout and chemical grout. Chemical grout has good injectability, low viscosity, co...

Examples

Embodiment 1

[0047] A time-varying viscosity slurry, comprising the following components in parts by weight:

[0048] Cement -------- 10 parts

[0049] Cellulose solvent --------0.02 parts

[0050] 0.5 parts of synthetic calcium and silicon early strength agent

[0051] 0.05 part of amide stability modifier

[0052] 5 parts of water.

[0053] The cellulose solvent is hydroxyethylmethylcellulose.

[0054] The synthetic calcium siliceous accelerator includes calcium nitrate and sodium silicate.

[0055] The amide stability modifier includes polyacrylamide and sodium acrylate.

[0056] This example is the most basic implementation mode. The time-varying viscosity slurry formed by this specific ratio has less raw material consumption, lower production cost, and has the characteristics of rapid strength growth in the early stage and high strength in the later stage, and good pourability.

[0057] The performance index of viscosity time-varying slurry is:

[0058] Pumpable time: 65min

[0...

Embodiment 2

[0064] A time-varying viscosity slurry, comprising the following components in parts by weight:

[0065] Cement -------- 20 parts

[0066] Cellulose solvent --------0.07 parts

[0067] Synthetic calcium silicate early strength agent 1 part

[0068] 0.08 part of amide stability modifier

[0069] 8 parts of water.

[0070] The cellulose solvent is hydroxyethylmethylcellulose.

[0071] The synthetic calcium siliceous accelerator includes calcium nitrate and sodium silicate.

[0072] The amide stability modifier includes polyacrylamide and sodium acrylate.

[0073] This embodiment is a better implementation mode. The time-varying viscosity slurry has the characteristics of fast strength growth in the early stage and high strength in the later stage, and has good groutability.

Embodiment 3

[0075] A time-varying viscosity slurry, comprising the following components in parts by weight:

[0076] Cement -------- 30 parts

[0077] Cellulose solvent --------0.1 parts

[0078] Synthetic calcium silicate early strength agent 2 parts

[0079] 0.1 part of amide stability modifier

[0080] 10 parts of water.

[0081] The cellulose solvent is hydroxyethylmethylcellulose.

[0082] The synthetic calcium siliceous accelerator includes calcium nitrate and sodium silicate.

[0083] The amide stability modifier includes polyacrylamide and sodium acrylate.

[0084] This embodiment is the best implementation mode. The cellulose solvent adopts hydroxyethyl methylcellulose, which has good salt tolerance and is easily soluble in water. When metal salts or organic electrolytes exist, it is relatively stable in aqueous solution. It has high viscosity and high water retention; synthetic calcium siliceous early strength agents include calcium nitrate and sodium silicate, which are r...

technical field

[0001] The invention relates to the technical field of grouting, in particular to a time-varying viscosity slurry and a preparation method thereof. Background technique

[0002] Grouting is the use of hydraulic pressure, air pressure or other methods to inject the grout with gelling ability into the cracks, voids or cavities in the rock formation or soil layer through the grouting drill hole or the grouting pipe inserted therein, and combine the moisture and The air is driven away, and the original loose soil particles or cracks are cemented into a whole, forming a "stone body" with new structure, high strength, strong waterproof and anti-seepage performance, and good chemical stability, which has achieved the improvement of rock or soil layers. A construction method for the purpose of performance.

[0003] At present, there are many kinds of grouting materials, mainly cement grout and chemical grout. Chemical grout has good injectability, low viscosity, co...

Examples

Embodiment 1

[0047] A time-varying viscosity slurry, comprising the following components in parts by weight:

[0048] Cement -------- 10 parts

[0049] Cellulose solvent --------0.02 parts

[0050] 0.5 parts of synthetic calcium and silicon early strength agent

[0051] 0.05 part of amide stability modifier

[0052] 5 parts of water.

[0053] The cellulose solvent is hydroxyethylmethylcellulose.

[0054] The synthetic calcium siliceous accelerator includes calcium nitrate and sodium silicate.

[0055] The amide stability modifier includes polyacrylamide and sodium acrylate.

[0056] This example is the most basic implementation mode. The time-varying viscosity slurry formed by this specific ratio has less raw material consumption, lower production cost, and has the characteristics of rapid strength growth in the early stage and high strength in the later stage, and good pourability.

[0057] The performance index of viscosity time-varying slurry is:

[0058] Pumpable time: 65min

[0...

Embodiment 2

[0064] A time-varying viscosity slurry, comprising the following components in parts by weight:

[0065] Cement -------- 20 parts

[0066] Cellulose solvent --------0.07 parts

[0067] Synthetic calcium silicate early strength agent 1 part

[0068] 0.08 part of amide stability modifier

[0069] 8 parts of water.

[0070] The cellulose solvent is hydroxyethylmethylcellulose.

[0071] The synthetic calcium siliceous accelerator includes calcium nitrate and sodium silicate.

[0072] The amide stability modifier includes polyacrylamide and sodium acrylate.

[0073] This embodiment is a better implementation mode. The time-varying viscosity slurry has the characteristics of fast strength growth in the early stage and high strength in the later stage, and has good groutability.

Embodiment 3

[0075] A time-varying viscosity slurry, comprising the following components in parts by weight:

[0076] Cement -------- 30 parts

[0077] Cellulose solvent --------0.1 parts

[0078] Synthetic calcium silicate early strength agent 2 parts

[0079] 0.1 part of amide stability modifier

[0080] 10 parts of water.

[0081] The cellulose solvent is hydroxyethylmethylcellulose.

[0082] The synthetic calcium siliceous accelerator includes calcium nitrate and sodium silicate.

[0083] The amide stability modifier includes polyacrylamide and sodium acrylate.

[0084] This embodiment is the best implementation mode. The cellulose solvent adopts hydroxyethyl methylcellulose, which has good salt tolerance and is easily soluble in water. When metal salts or organic electrolytes exist, it is relatively stable in aqueous solution. It has high viscosity and high water retention; synthetic calcium siliceous early strength agents include calcium nitrate and sodium silicate, which are r...

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