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Light grouting material for grouting treatment of highway goaf and preparation method of light grouting material

A technology of grouting materials and gobs, applied in applications, household utensils, ceramic products, etc., can solve the problems of adverse effects on the stability of gobs, potential safety hazards in goaf stability, and high water content of grouting slurry, and achieve The effect of shortening the grouting construction period, good social and economic benefits, and reducing the amount of grouting

Active Publication Date: 2016-05-18
CCCC FIRST HIGHWAY CONSULTANTS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 1. Due to the high water content and large volume of the grouting slurry, and the dry shrinkage of the stone body, it has an adverse effect on the stability of the goaf in the gully area and high slope, such as: on the overlying rock in the goaf Generate additional tension, additional pressure on the foundation below the goaf, and an additional thrust on the inside of the slope, which will break the original stability of the goaf foundation and slope
[0005] 2. For the goaf in the loess area, the moisture in the grouting slurry will cause the collapsibility of the overlying loess layer in the goaf, aggravate the settlement deformation of the overlying rock layer and the road in the goaf, and affect the stability of the goaf. Big security risk

Method used

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  • Light grouting material for grouting treatment of highway goaf and preparation method of light grouting material
  • Light grouting material for grouting treatment of highway goaf and preparation method of light grouting material
  • Light grouting material for grouting treatment of highway goaf and preparation method of light grouting material

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preparation example Construction

[0027] The lightweight grouting material used in the grouting treatment of highway mined-out area is to mix cement, fly ash and water to prepare cement fly ash slurry, and then add an anion-amphoteric surfactant compound foaming agent A lightweight grouting material obtained by solution mixing. Concrete preparation method comprises the following steps:

[0028] Step 1: mixing cement, fly ash and water according to the mass ratio of 21:14:15, stirring evenly to obtain cement fly ash slurry;

[0029] Step 2: Add the anion-zwitterionic surfactant into the water, stir evenly to obtain a surfactant solution with a concentration of 0.60-0.64g / 100mL, and then add the mass ratio of the anion-zwitterionic surfactant to the surfactant solution Be the stabilizing agent of 5:32, obtain anion-amphoteric surfactant compound whipping agent solution;

[0030] Step 3: in the cement fly ash slurry that step 1 obtains, add the anion-amphoteric surfactant compound blowing agent solution that st...

Embodiment 1

[0039] In the anionic-zwitterionic surfactant, the mass ratio of the anionic surfactant to the amphoteric surfactant is 8:1.

[0040] Verified by the use of the test road, the lightweight grouting material used in this implementation example has low concretion density and high compressive strength, meeting the specification requirements. The dry density of stone body is about 0.6g / cm 3 , Dry compressive strength and saturated compressive strength ≥ 2.0MPa. See the table below for specific technical indicators:

[0041]

Embodiment 2

[0043] In the anionic-zwitterionic surfactant, the mass ratio of the anionic surfactant to the amphoteric surfactant is 6:1.

[0044] Verified by the use of the test road, the lightweight grouting material used in this implementation example has low concretion density and high compressive strength, meeting the specification requirements. The dry density of stone body is about 0.6g / cm 3 , Dry compressive strength and saturated compressive strength ≥ 1.6MPa. See the table below for specific technical indicators:

[0045]

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Abstract

The invention relates to a light grouting material for grouting treatment of a highway goaf and a preparation method of the light grouting material. An existing under-highway goaf grouting treatment technology has the defects of being high in grout water content and large in unit weight. Cement, coal ash and water are mixed and evenly stirred to obtain cement and coal ash slurry; a negative and positive zwitter ion surface active agent is added to water to be evenly stirred to obtain a surface active agent solution, a stabilizer is added to the surface active agent solution to obtain a negative and positive zwitter surface active agent compound foaming agent solution; cement and coal ash slurry is doped with the negative and positive zwitter surface active agent compound foaming agent solution to be stirred to obtain the light grouting material. The prepared light grouting material is small in stone body density, large in intensity, good in construction performance, little in grouting and much in filling, and capable of overcoming the defects of the prior art.

Description

technical field [0001] The invention belongs to the technical field of road engineering, and in particular relates to a lightweight grouting material used for grouting treatment of highway mined-out areas and a preparation method thereof. Background technique [0002] The gobs of coal mines under highways in Northwest my country are treated with various methods such as grouting, filling, excavation and backfilling, and dynamic compaction. Among them, the full-fill grouting method is the most widely used and has the widest application range; other methods are suitable for goafs with shallow burial or weak overlying rock mass, and their use conditions are subject to certain restrictions. [0003] The grouting material of the full filling method is mainly cement fly ash slurry, and there are also cement clay or cement loess slurry, which vary from place to place. However, the gobs of highways are mostly located in mountainous areas, loess gully areas, etc. High-filling and dee...

Claims

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Application Information

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IPC IPC(8): C04B28/04C04B38/10
CPCC04B28/04C04B2111/00724C04B2201/20C04B2201/50C04B18/08C04B24/02C04B24/16C04B24/123C04B38/10
Inventor 刘军勇张留俊陈亚芍余文静寇博沈鹏
Owner CCCC FIRST HIGHWAY CONSULTANTS
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