Red mud-based soil stabilizer and preparation method thereof

A technology of soil stabilizer and red mud, which is applied in chemical instruments and methods, soil conditioning materials, solid waste management, etc., can solve the problems of pollution, high storage cost, and low utilization rate of red mud, and achieve excellent comprehensive performance and enhanced Large utilization rate and far-reaching practical significance

Pending Publication Date: 2022-05-24
HENAN PROVINCIAL COMM PLANNING & DESIGN INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In view of the low utilization rate of red mud, serious pollution, and high storage costs, it is urgent to maximize the resource utilization of red mud

Method used

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  • Red mud-based soil stabilizer and preparation method thereof
  • Red mud-based soil stabilizer and preparation method thereof
  • Red mud-based soil stabilizer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Example 1 Preparation of 1# red mud-based soil stabilizer

[0033] Raw material ratio: red mud 70%, enhancer (carbide slag) 25%, activator (sodium hydroxide) 5%;

[0034] Preparation method: firstly, the red mud and carbide slag are dried to a moisture content of less than 1%, mixed with sodium hydroxide, and then sent to a pulverizer to grind to a particle size of less than 300 mesh to obtain a finished product of 1# red mud-based soil curing agent .

[0035] Add the prepared 1# curing agent to the soil at a dosage of 4%, measure the optimum moisture content, add water at the optimum moisture content of the mixture, mix and compact it uniformly, and maintain it according to the test method. , test the properties of the solidified soil, as shown in Table 4.

Embodiment 2

[0036] Example 2 Preparation of 2# red mud-based soil stabilizer

[0037] Raw material ratio: red mud 50%, enhancer (carbide slag: steel slag powder = 2:1) 40%, activator (titanium gypsum) 10%;

[0038] Preparation method: first, coarsely grind red mud, carbide slag, steel slag powder and titanium gypsum into particles with a particle size of less than 5 mm, dry to a moisture content of less than 1%, and then send the mixture prepared in proportion to a pulverizer Grind to a particle size of less than 300 mesh to obtain a finished product of 2# red mud-based soil curing agent.

[0039] Add the prepared 2# curing agent to the soil according to the mixing amount of 4%, 6% and 8% respectively, measure the optimum moisture content, add water with the optimum moisture content of the mixture, mix and compact it uniformly, according to the test method After curing, after the maturity period, the properties of the solidified soil were tested, as shown in Table 4.

Embodiment 3

[0040] Example 3 Preparation of 3# red mud-based soil curing agent

[0041] Raw material ratio: red mud 30%, enhancer (P.O 42.5 cement) 60%, activator (sodium silicate) 10%;

[0042] Preparation method: dry the red mud to a moisture content of less than 1%, then send the red mud, P.O 42.5 cement and sodium silicate mixture prepared in proportion to a pulverizer and grind to a particle size of less than 300 mesh to obtain 3# Red mud-based soil stabilizer product.

[0043] Add the prepared 3# solidifying agent into the soil according to the mixing amount of 4%, measure the optimum moisture content, add water at the optimum moisture content of the mixture, mix and compact it uniformly, and maintain it according to the test method. , test the properties of the solidified soil, as shown in Table 4.

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Abstract

The invention discloses a red mud-based soil stabilizer, which is prepared from 20-70% of raw material red mud, 20-70% of reinforcing agent and 5-20% of exciting agent by the following steps of: coarsely grinding large-particle materials in the red mud, the reinforcing agent and the exciting agent into small particles, detecting the moisture content of each raw material, calculating the wet weight ratio of each raw material according to the dry mass ratio of the red mud to the reinforcing agent to the exciting agent of (20-70%): (20-70%): (5-20%), electronically weighing, adding the red mud, the reinforcing agent and the exciting agent into the red mud-based soil stabilizer, and uniformly mixing the red mud, the reinforcing agent and the exciting agent to obtain the red mud-based soil stabilizer. The mixture is discharged to a conveying belt, enters drying equipment together with the conveying belt, and is stirred and dried until the moisture content of the mixture is lower than 1%; and finally, feeding the mixture into a pulverizer, and grinding the mixture until the particle size is less than 300 meshes, so as to obtain a finished product of the red-mud-based soil stabilizer. According to the method, a large amount of industrial solid waste is used, the utilization rate of the red mud is increased, the industrial policies of energy conservation, emission reduction and green development in China are met, the method plays a positive role in promoting resource utilization of the industrial solid waste such as the red mud, and the method has wide and profound practical significance.

Description

technical field [0001] The invention relates to a soil solidifying agent, in particular to a red mud-based soil solidifying agent using industrial solid waste red mud as the main raw material, and the invention also relates to a preparation method of the soil solidifying agent. Background technique [0002] At present, in the field of highway engineering construction, the general practice of soil improvement treatment is to mix cement, lime and other solidifying materials into the soil to improve the engineering performance of the soil. According to years of engineering practice, there are still many deficiencies in traditional modifiers. Cracks often appear due to dry shrinkage, which causes moisture to easily enter the cracks and damage the internal structure of the soil. Moreover, the production of cement and lime requires the exploitation of a large amount of clay, limestone, etc., which not only consumes a lot of energy, causes soil erosion and ecological imbalance, but...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K17/10C09K17/08C09K103/00
CPCC09K17/10C09K17/08C09K2103/00Y02W30/91
Inventor 王笑风杨博张晓果褚付克侯明业万晨光
Owner HENAN PROVINCIAL COMM PLANNING & DESIGN INST CO LTD
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