Red mud curing agent for paving road and preparation method of red mud curing agent

A curing agent and red mud technology, applied in the field of red mud curing agent and its preparation, can solve problems such as road structure damage and environmental pollution, and achieve the effects of reducing project cost, reducing environmental pollution and shortening construction period

Inactive Publication Date: 2014-08-20
HENAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem of environmental pollution or road structure damage that may be caused by adding cement, lime and other solidifying materials into red mud during the construction of the existing road base, the invention provides a red mud solidifying agent for road construction and a preparation method thereof

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 1) Ingredients and preparation of red mud curing agent:

[0030] According to the weight ratio, mix and dry 10 parts of calcium oxide and 20 parts of industrial by-product alkali slag until the water content is below 1%, and then grind until the particle size is not greater than 0.074mm, and set aside;

[0031] Take 30 parts of silicon oxide and 20 parts of aluminum oxide and mix them evenly, crush them into small and medium-sized particles with a particle size of not more than 0.074mm, and the standard sieve balance is not more than 15%, and set aside;

[0032] Take 10 parts of tetrahydrophthalic anhydride ester and heat at 150-200°C for 24 hours to cure naturally and set aside;

[0033] Take 10 parts of ethylene glycol bis-trimellitic anhydride ester and heat it at 150°C for 1 hour and then at 180°C for 4 hours to cure naturally and set aside;

[0034] Mix and crush the solidified tetrahydrophthalic anhydride ester and ethylene glycol bis-trimellitic anhydride ester ...

Embodiment 2

[0041] 1) Ingredients and preparation of red mud curing agent:

[0042] According to the weight ratio, 20 parts of calcium oxide and 10 parts of industrial by-product alkali slag are mixed and dried to a water content of less than 1%, and then ground to a particle size of no more than 0.074mm, and set aside;

[0043] Take 20 parts of silicon oxide and 40 parts of aluminum oxide and mix them evenly, crush them to the size of small and medium-sized particles of materials not greater than 0.074mm, and the standard sieve balance is not more than 15%, and set aside;

[0044] Take 5 parts of tetrahydrophthalic anhydride ester and heat at 150-200°C for 24 hours to cure naturally and set aside;

[0045] Take 5 parts of ethylene glycol bis-trimellitic anhydride ester and heat it at 150°C for 1 hour and then at 180°C for 4 hours, naturally solidify and set aside;

[0046] Mix and crush the solidified tetrahydrophthalic anhydride ester and ethylene glycol bis-trimellitic anhydride ester i...

Embodiment 3

[0053] 1) Ingredients and preparation of red mud curing agent:

[0054] According to the weight ratio, mix and dry 10 parts of calcium oxide and 20 parts of industrial by-product alkali slag until the water content is below 1%, and then grind until the particle size is not greater than 0.074mm, and set aside;

[0055] Take 20 parts of silicon oxide and 30 parts of aluminum oxide and mix them evenly, crush them to the size of small and medium-sized particles of materials not greater than 0.074mm, and the standard sieve balance does not exceed 15%, and set aside;

[0056] Take 10 parts of tetrahydrophthalic anhydride ester and heat at 150-200°C for 24 hours to cure naturally and set aside;

[0057] Take 10 parts of ethylene glycol bis-trimellitic anhydride ester and heat it at 150°C for 1 hour and then at 180°C for 4 hours to cure naturally and set aside;

[0058] Mix and crush the solidified tetrahydrophthalic anhydride ester and ethylene glycol bis-trimellitic anhydride ester...

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Abstract

The invention relates to a red mud curing agent for paving a road and a preparation method of the red mud curing agent. The red mud curing agent is made of silicon oxide, aluminum oxide, calcium oxide, industrial byproduct alkali residue, tetrahydrophthalic anhydride and ethylene glycol double trimellitic anhydride ester. According to the preparation method, the active matters, such as silicon oxide, aluminum oxide and calcium oxide, are mixed; the active constituents of the matters are matched with one another, thereby obtaining curing agent and red mud; after being stirred, the curing agent and the red mud are subjected to ion exchange under the catalysis of concentrated material, thereby boosting the coagulation of red mud particles; and meanwhile, the red mud is coagulated and hardened, under the hydration reaction of a gelled material in the curing agent; the red mud has higher working strength within a short period of time; and the exosmose of heavy metal, radioactive elements and the like, is avoided. The red mud curing agent prepared by the preparation method disclosed by the invention is used together with red mud for paving the road. Compared with the prior art, the red mud curing agent has the advantages of high strength, excellent plate property, high durability, excellent water stability, excellent frost and melt resistance, excellent air shrinkage resistance, and the like.

Description

technical field [0001] The invention relates to a building material, in particular to a red mud curing agent for road construction and a preparation method thereof. Background technique [0002] Red mud is a strong alkaline solidified waste produced in the process of producing alumina with bauxite as raw material. According to incomplete statistics, my country discharges nearly 10 million tons of red mud every year. With the increase of alumina production and the gradual decrease of bauxite grade, the annual output of red mud will continue to increase. The comprehensive utilization of red mud is still a worldwide problem. Internationally, red mud is mainly disposed of by stockpiling and covering soil, which not only occupies a large amount of land, but also produces secondary pollution. According to the joint document issued by the Ministry of Industry and Information Technology and the Ministry of Science and Technology (Document No. 2010-401) to improve the comprehensive ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/00
Inventor 王辉张玉清朱书法王晓赵燕
Owner HENAN UNIV OF SCI & TECH
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