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Nano-fiber curing agent for disintegrating carbonaceous mudstone and its preparation and use methods

A carbonaceous mudstone and fiber solidification technology, applied in the field of geotechnical engineering materials, can solve problems such as large seasonal changes in atmospheric temperature and humidity, instability and damage of embankments and slopes, and shortened road service life, and achieve good solidification effect. , good durability, reducing the effect of cracks

Active Publication Date: 2022-02-15
CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Carbonaceous mudstone contains a large amount of clay minerals such as kaolinite, illite, and montmorillonite with strong hydrophilicity. Water sensitive, has the characteristics of water absorption expansion, loss of water shrinkage, and is prone to softening and disintegration, resulting in a significant decrease in various mechanical properties
Carbonaceous mudstone is widely distributed in hot and humid areas, and the rainfall in hot and humid areas is large, frequent rainstorms, and the seasonal variation of atmospheric temperature and humidity is large. Disintegration of carbonaceous mudstone is formed, and disintegration of carbonaceous mudstone can easily cause secondary wetting deformation, continuous disintegration, and even cause embankment and slope instability and damage, thereby causing huge economic losses
[0003] Traditional cement stabilization and reinforcement materials are widely used due to the availability of materials, convenient construction, and low cost. However, they have disadvantages such as large shrinkage coefficients and easy shrinkage cracks. In the application of embankments and slopes, it is easy to reduce the service life of roads. cause slope instability
Most of the high-efficiency soil stabilizers are liquid soil stabilizers imported from abroad, such as the American Lubang EN-1 ionized soil stabilizer, the American PALMA soil solidifying enzyme, the Bessel polymer emulsion, and the American ISS. more expensive

Method used

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  • Nano-fiber curing agent for disintegrating carbonaceous mudstone and its preparation and use methods
  • Nano-fiber curing agent for disintegrating carbonaceous mudstone and its preparation and use methods
  • Nano-fiber curing agent for disintegrating carbonaceous mudstone and its preparation and use methods

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] The preparation method of the nano-fiber solidifying agent used for disintegrating carbonaceous mudstone is specifically carried out according to the following steps:

[0043] S1, weighed according to the following parts by weight: 32 parts of 42.5 grade Portland slag cement, nanometer Al 2 o 3 2 parts, 1 part of nano-montmorillonite, 10 parts of poly-tert-butylacrylamide hydrogel, 1 part of disodium edetate, 35 parts of slag, 3 parts of glass fiber material, 16 parts of water;

[0044] S2, at 10°C, the weighed poly-tert-butylacrylamide hydrogel, disodium ethylenediaminetetraacetic acid and nano-Al 2 o 3 1. Dissolve nano-montmorillonite in an appropriate amount of absolute ethanol to obtain a fully dissolved mixed solution. Add 70% of 16 parts of water to the mixed solution, and the ultrasonic stirring rate is 1000 rpm, and stir for 0.1h until uniform, and the curing agent is prepared. ;

[0045] S3, at 10°C, put the expected curing agent, the weighed glass fiber ma...

Embodiment 2

[0049] The preparation method of the nano-fiber solidifying agent used for disintegrating carbonaceous mudstone is specifically carried out according to the following steps:

[0050] S1, weighed according to the following parts by weight: 34 parts of 42.5 grade Portland slag cement, nanometer CaCO 3 3 parts, 1 part of nano-montmorillonite, 8 parts of poly-tert-butylacrylamide hydrogel, 1 part of disodium edetate, 30 parts of slag, 3 parts of ceramic fiber material, 20 parts of water;

[0051] S2. At 25°C, the weighed poly-tert-butylacrylamide hydrogel, disodium ethylenediaminetetraacetic acid and nano-CaCO 3 1. Dissolve nano-montmorillonite in an appropriate amount of absolute ethanol to obtain a fully dissolved mixed solution, add 70% of 20 parts of water to the mixed solution, and ultrasonically stir at 1200 rpm, stir for 0.1h until uniform, and prepare the curing agent. ;

[0052] S3, at 25°C, put the expected curing agent, the weighed ceramic fiber material, and the weig...

Embodiment 3

[0056] The present invention is used for the preparation method of the nano-fiber curing agent of disintegrating carbonaceous mudstone, specifically carries out according to the following steps:

[0057] S1, weighed according to the following parts by weight: 40 parts of 42.5 grade ordinary Portland cement, nanometer Al 2 o 3 1 part, 1 part of nano-montmorillonite, 6.5 parts of polymethylenebisacrylamide hydrogel, 0.5 part of disodium edetate, 25 parts of slag, 6 parts of quartz fiber material, 20 parts of water;

[0058] S2. At 35°C, the weighed polymethylenebisacrylamide hydrogel, disodium ethylenediaminetetraacetic acid and nano-Al 2 o 3 1. Dissolve nano-montmorillonite in an appropriate amount of absolute ethanol to obtain a fully dissolved mixed solution. Add 70% of 25 parts of water into the mixed solution, and the ultrasonic stirring rate is 1000 rpm, and stir for 0.1h until uniform, and the curing agent is prepared. ;

[0059] S3, at 35°C, place the expected curing...

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Abstract

The invention discloses a nano-fiber curing agent for disintegrating carbonaceous mudstone and its preparation and use methods. The nano-fiber curing agent for disintegrating carbonaceous mudstone consists of the following parts by weight: 30-40 parts of cement , 2-5 parts of nanomaterials, 5-10 parts of organic gel, 0.5-1 parts of disodium edetate, 25-35 parts of slag, 2-6 parts of fiber materials, and 16-25 parts of water. The nano-fiber curing agent for disintegrating carbonaceous mudstone provided by the present invention is an inorganic-organic composite curing agent, and the cured disintegrating carbonaceous mudstone has unconfined compressive strength under the synergy of various components The advantages of high quality and good structural integrity realize the reuse of slag while reducing the amount of cement, low cost, energy saving and pollution reduction.

Description

technical field [0001] The invention belongs to the technical field of geotechnical engineering materials, and relates to a nano-fiber curing agent for disintegrating carbonaceous mudstone and its preparation and use methods. Background technique [0002] Carbonaceous mudstone contains a large amount of clay minerals such as kaolinite, illite, and montmorillonite with strong hydrophilicity. Water sensitive, has the characteristics of water absorption expansion, loss of water shrinkage, and is prone to softening and disintegration, resulting in a significant decrease in various mechanical properties. Carbonaceous mudstone is widely distributed in hot and humid areas, and the rainfall in hot and humid areas is large, frequent rainstorms, and the seasonal variation of atmospheric temperature and humidity is large. The disintegration of carbonaceous mudstone is formed, and the disintegration of carbonaceous mudstone can easily cause secondary wetting deformation, continuous dis...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/04
CPCC04B28/04C04B2201/50C04B2111/00732C04B14/42C04B14/104C04B14/303C04B24/287C04B24/12C04B18/141C04B14/28C04B14/46C04B14/4631
Inventor 付宏渊陈彩营曾铃
Owner CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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