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Double-fluid rapid hardening slurry for roadway grouting and mollisol compaction grouting

A technology of compaction grouting and grouting, which is applied in the field of two-liquid quick-setting grout for tunnel grouting and soft soil compaction grouting, which can solve the problems of difficult guarantee of grouting effect, poor water corrosion resistance, and durability of stone bodies Poor performance and other problems, to achieve the effect of adjustable gel time, improved grouting process, and easy operation

Inactive Publication Date: 2011-02-16
BEIJING CHINA COAL MINE ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, after adding dilute sodium silicate, the cement-water glass slurry stone body has poorer water corrosion resistance, and the grouting effect is more difficult to guarantee.
[0006] Therefore, cement-sodium silicate grout solves the requirements of short grouting time and high solidification rate for grouting in roadway grouting and compaction grouting. The stone body has poor durability and is easy to pulverize; the injection volume ratio (1:0.6) is required to make the grouting process complicated.

Method used

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  • Double-fluid rapid hardening slurry for roadway grouting and mollisol compaction grouting
  • Double-fluid rapid hardening slurry for roadway grouting and mollisol compaction grouting
  • Double-fluid rapid hardening slurry for roadway grouting and mollisol compaction grouting

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] The two-liquid quick-setting slurry is composed of the following components: Liquid A: Portland cement 50%, water 49.475%, inorganic sodium salt 0.5%, organic alcohol early strength agent 0.025%; liquid B: fly ash 43.6%, Sodium silicate 20.05%, water 36.35%. The volume ratio of liquid A and liquid B is 1:1.

[0015] The calculus rate of the slurry in this embodiment is 100%, and the gel time is 36s, which has obvious characteristics of fast setting and high calculus rate.

[0016] In order to characterize the early strength performance of the grout, the hourly compressive strength and later strength of the grout stone body were measured. The experimental results are shown in Table 1.

[0017] Early compressive strength of grout Table 1

[0018]

[0019] It can be seen from Table 1 that the slurry has strength within 1 hour, the compressive strength of the stone body can reach 1.5MPa at 6 hours, and the compressive strength can reach 9MPa at 28 days.

Embodiment 2

[0021] The two-liquid quick-setting slurry is composed of the following components: A liquid A: Portland cement 50%, water 49.45%, inorganic sodium salt 0.5%, organic alcohol early strength agent 0.05%; B liquid B: fly ash 46.2% %, sodium silicate 16.94%, water: 36.86%. The volume ratio of liquid A and liquid B is 1:1.

[0022] The calculus rate of the slurry in this embodiment is 100%, and the gel time is 82s, which has obvious characteristics of fast setting and high calculus rate.

[0023] In order to further characterize the early strength performance of the slurry, the hourly compressive strength and later strength of the slurry stone body were measured. The experimental results are shown in Table 2.

[0024] Early compressive strength of grout Table 2

[0025]

Embodiment 3

[0027] The two-liquid quick-setting slurry is composed of the following components: A liquid A: Portland cement 50%, water 49.2%, inorganic sodium salt 0.75%, organic alcohol early strength agent 0.05%; B liquid B: fly ash 48.8% %, sodium silicate 13.9%, water 37.3%. The volume ratio of liquid A and liquid B is 1:1.

[0028] The calculus rate of the slurry in this embodiment is 100%, and the gel time is 124s, which has obvious characteristics of fast setting and high calculus rate.

[0029] In order to further characterize the early strength performance of the slurry, the hourly compressive strength of the slurry stone body was measured. The experimental results are shown in Table 3.

[0030] Early compressive strength of grout Table 3

[0031]

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Abstract

The invention discloses double-fluid rapid hardening slurry for roadway grouting and mollisol compaction grouting, remedying the defects that a cement-sodium silicate slurry concrement body has poor durability, and the grouting process is complicated. The slurry contains fluids A and B; the fluids A and B are injected at equal volume, and the on-site operation is simple. The fluid A contains 50 percent of portland cement, 0.5-0.75 percent of inorganic sodium salt, 0.025-0.05 percent of organic alcohol early strength agent and the balance of water; and the fluid B contains 43.6-48.8 percent of coal ash, 13.9-20.05 percent of sodium silicate and the balance of water. The performances of the slurry are shown as follows: the gelation time is adjustable within the range of 36s-124s, the concrement rate is 100 percent and the early compression strength is high; moreover, the concrement body has good durability and does not crack or pulverize. Compared with the original cement-sodium silicate slurry, the grouting process is simple, the durability of the slurry concrement body is obviously improved, the sodium silicate consumption is saved and the grouting cost is greatly reduced.

Description

Technical field: [0001] The invention relates to a two-liquid quick-setting grout used for coal mine roadway grouting and soft soil compaction grouting. Background technique: [0002] In the process of coal mine well construction, when the water-bearing rock formation is excavated and exposed, water gushing, sand emission, shaft wall or roadway cracking, sidewalls, roof fall, etc., must be blocked and reinforced by grouting technology, which is generally referred to as well roadway grouting . In weak areas, such as silt, sandy soil, miscellaneous fill and other strata, the compaction grouting technology is used to increase the strength of the foundation, and it is also widely used. The main grouting materials of these two different grouting techniques are "cement-sodium silicate" double slurry. [0003] The cement-water glass slurry has a short setting time and a high setting rate. Over the years, it has been widely used in soft soil reinforcement, well wall grouting, wat...

Claims

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Application Information

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IPC IPC(8): C09K8/467
Inventor 徐润杨春满周兴旺郑军高岗荣袁辉袁东锋宋雪飞王正胜籍晓龙
Owner BEIJING CHINA COAL MINE ENG CO LTD
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