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A fast-setting early-strength mixed slurry

A technology of mixing slurry and slurry, applied in the field of plugging grouting materials, can solve the problems of high cost and low initial strength of gel

Active Publication Date: 2020-10-20
POWERCHINA ZHONGNAN ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Among them, polyurethane chemical grout is the most commonly used, but because of the low initial strength of the gel, it is only used for plugging grouting with low water gushing pressure, and it is expensive

Method used

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  • A fast-setting early-strength mixed slurry
  • A fast-setting early-strength mixed slurry

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Experimental program
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Embodiment

[0020] Embodiment: This embodiment provides a mixed slurry of underwater non-dispersible paste and polyurethane, wherein a kind of underwater non-dispersible paste includes cement, bentonite, vegetable glue, sodium hydroxide, water; underwater non-dispersible paste The weight ratio of the slurry is configured according to cement (1): bentonite (0.1-0.2): vegetable glue (0.01-0.03): sodium hydroxide (0.001-0.003): water (0.5-1). Cement is ordinary Portland cement with a strength grade of not less than 42.5MPa; bentonite is special bentonite for grouting; vegetable glue is SH vegetable glue. Polyurethane is a polyurethane chemical slurry specially used for plugging and grouting; the volume ratio of underwater non-dispersible slurry and polyurethane mixed slurry is configured according to underwater non-dispersible slurry (1): polyurethane (0.1-0.5).

[0021] Table 1 Three kinds of proportions and main properties of the mixed slurry of this embodiment

[0022]

[0023] Engine...

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Abstract

The invention discloses quick-setting early-strength mixed slurry. The quick-setting early-strength mixed slurry consists of underwater non-dispersing paste and polyurethane chemical slurry with the volume ratio of 1:(0.1-0.5), wherein the underwater non-dispersing paste comprises the following components: cement, bentonite, vegetable glue, sodium hydroxide and water with the weight ratio of 1:(0.1-0.2):(0.01-0.03):(0.001-0.003):(0.5-1). According to the quick-setting early-strength mixed slurry, the mixed slurry is formed by the underwater non-dispersing paste and polyurethane, and fast and effective grouting treatment for high-pressure gushing water can be realized by fully utilizing underwater impacting resistance of the underwater non-dispersing paste, fast gelling performance of the polyurethane when meeting water, and the expanding and elastic characteristics of gelling of the mixed slurry.

Description

technical field [0001] The invention relates to a fast-setting early-strength mixed grout, which belongs to the technical field of plugging and grouting materials. Background technique [0002] In March 2016, Dongjiang Hydropower Station was in the process of repairing the working door and inspection door of the secondary vent hole. It was found that there was a large water inflow in the F2 and F3 fault zones. The on-site detection of water inflow was about 0.2m3 / s. The static pressure is close to the 100m head of the reservoir water. According to the preliminary analysis, it is caused by the quality defect of the consolidation grouting of the surrounding rocks in the F2 and F3 fault zones. Due to the long-term seepage erosion, the expansion and penetration of the seepage pipes in the fault permeable zone have been caused. In this regard, in order to prevent the long-term seepage of the water gushing pipeline from further digging and expanding the surrounding rock fault zon...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/04C04B111/70C04B111/74
CPCC04B28/04C04B2111/70C04B2111/74C04B14/104C04B22/064C04B24/00C04B24/38C04B24/282
Inventor 陈安重胡铁桥卢贤伟李永丰王少华张驰潘龙
Owner POWERCHINA ZHONGNAN ENG