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Mudstone hydrophobically modified grouting material and preparation method thereof

A grouting material and hydrophobic modification technology, which is applied in the field of underground engineering safety, can solve the problems of poor anti-hydrophobic performance of roadways, short effective time, and inability to change the adsorption characteristics of clay and mudstone, so as to enhance filling effect and improve fluidity. , The effect of enhancing the grouting strength

Active Publication Date: 2020-04-17
LIAONING TECHNICAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ordinary Portland cement is a commonly used traditional grouting raw material, but it does not make the roadway anti-hydrophobic performance outstanding, the effective time is not long, and the roadway reinforcement of clay-containing mudstone with high underground water content is limited, and it can only be cemented by cement filling The effect of reducing the adsorption of capillary fissures to water, but it cannot change the essence of the strong adsorption characteristics of clay mudstone to groundwater.

Method used

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  • Mudstone hydrophobically modified grouting material and preparation method thereof
  • Mudstone hydrophobically modified grouting material and preparation method thereof
  • Mudstone hydrophobically modified grouting material and preparation method thereof

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preparation example Construction

[0051] The preparation method of described grouting modified material comprises the following steps:

[0052] Step 1. Take Portland cement, water-quenched slag powder, coal gangue micropowder, water reducing agent, surfactant solution and water glass solution according to the proportion by weight;

[0053] Step 2: firstly mix the ordinary portland cement, water-quenched slag and coal gangue micro-powder, and after stirring uniformly once, add water reducing agent, surfactant solution and water glass, after fully mixing, stir uniformly again, Obtain grouting material.

[0054] In the second step, the stirring speed is 180 r / min, the primary stirring time is 10-15 minutes, and the secondary stirring time is 2-4 minutes.

[0055] In the second step, the initial setting time of the grouting material is 266-364 minutes, and the final setting time is 397-495 minutes. The setting time test is detected according to GB / T 1346-2011.

[0056] In the second step, after the grouting mate...

Embodiment 1

[0067] A modified grouting material, which is made of the following proportions by weight: 40 parts of ordinary Portland cement, 5 parts of water-quenched slag powder, 20 parts of coal gangue micropowder, 2 parts of water reducer, and 60 parts of surfactant solution parts, 5 parts of water glass solution. The water-quenched slag powder is produced by blast furnace ironmaking, and is crushed and screened to make the particle size less than 400 mesh powder; the coal gangue powder is mixed with coal gangue and calcium oxide powder at a ratio of 2:1, calcined at 600°C for 40 minutes, and passed through Quenching and cooling in water, crushing and sieving into powders of three particle sizes of 40-100 mesh, 100-200 mesh and 200-400 mesh, mixed according to the ratio of 1:1:6, the water reducer is lignosulfonic acid Salt; the concentration of the water glass is 39Be, and the modulus is about 3.1; the surfactant solution is a mixed reaction of octadecenoic acid and sodium hydroxide a...

Embodiment 2

[0072] A modified grouting material, which is prepared by the following proportions by weight: 50 parts of ordinary portland cement, 8 parts of water-quenched slag powder, 18 parts of coal gangue micropowder, 3 parts of water reducing agent, and 70 parts of surfactant solution Parts, 6 parts of water glass solution. The water-quenched slag powder is produced by blast furnace ironmaking, and it is crushed and screened to make the particle size less than 400 mesh powder; the coal gangue powder is mixed with coal gangue and calcium oxide powder at a ratio of 2:1, calcined at 700 ° C for 60 minutes, and passed through Quenching and cooling in water, crushing and sieving into powders of three particle sizes of 40-100 mesh, 100-200 mesh and 200-400 mesh, mixed according to the ratio of 1:1:6, the water reducer is lignosulfonic acid Salt; the concentration of the water glass is 39Be, and the modulus is about 3.1; the surfactant solution is a mixed reaction of octadecenoic acid and so...

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Abstract

The invention discloses a mudstone hydrophobically modified grouting material and a preparation method thereof, and belongs to the technical field of underground engineering safety. The hydrophobically modified grouting material is prepared from, by weight, 40-50 parts of ordinary Portland cement, 5-10 parts of water-quenched slag, 10-20 parts of coal gangue powder, 2-3 parts of a water reducing agent, 50-70 parts of a surfactant solution and 5-8 parts of water glass. All the components are mixed in sequence to prepare the grouting material. The grouting material can enhance the water resistance of mudstone surrounding rock, reduce the water absorption expansion of the surrounding rock, improve the filling effect and enhance the compression resistance, and meanwhile, the influence of industrial solid wastes on the environment is reduced by utilizing the water-quenched slag and the coal gangue powder.

Description

Technical field: [0001] The invention belongs to the technical field of underground engineering safety, and in particular relates to a mudstone hydrophobically modified grouting material and a preparation method thereof. Background technique: [0002] With the development of the national economy, the demand for coal resources continues to increase. In the process of continuous coal mining, the engineering geological problems encountered continue to become prominent, especially when coal mining encounters mudstone geological conditions. Since mudstone is mostly composed of clay Clay minerals expand when they encounter water, which is because water molecules enter the mineral lattice layer to increase the volume of the mineral lattice; on the other hand, the cations in the lattice layer dissolve in water to make the mineral surface negatively charged, As a result, repulsion occurs between particles, and the gap increases to cause expansion. In the process of coal mining, clay...

Claims

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Application Information

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IPC IPC(8): C04B28/04C04B24/08C04B18/02C04B103/40C04B18/12C04B111/27C04B111/70
CPCC04B18/023C04B24/085C04B28/04C04B2103/40C04B2111/00663C04B2111/00724C04B2111/27C04B2111/70C04B18/141C04B24/18C04B12/04C04B18/12C04B22/064Y02W30/91
Inventor 李苗苗殷志祥张振陈良旭孙乾予路沙沙
Owner LIAONING TECHNICAL UNIVERSITY
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