Method for preparing pavement base material by stabilizing iron tailings by novel soil stabilizer

A pavement base material and soil curing agent technology, applied in the direction of soil conditioning materials, chemical instruments and methods, organic fertilizers, etc., to achieve the effects of optimizing performance, improving service life, and expanding the scope of application

Active Publication Date: 2014-11-19
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The invention can make large-scale use of solid waste iron tailings, and at the same time, various technical indicators of the base material meet the requirements of national standards, which solves the environmental problems caused by the large amount of iron tailings stockpiled and the mining of road sand and gravel materials, and brings economic benefits

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The preparation of embodiment 1 novel soil solidifying agent

[0026] First, dilute the Tairan bio-enzyme soil stabilizer 100 times with water, and then add 10% CaCl of the diluted solution 2 And 8% acidified water glass (acidified water glass preparation: industrial water glass and 20% dilute sulfuric acid are mixed at a mass ratio of 1:1), the mixed liquid is put into a microwave reactor, and the microwave heating is reacted at 30°C for 30 Minutes, take out the mixed solution and cool to room temperature to obtain a new type of soil stabilizer.

Embodiment 2

[0028]The method for preparing the pavement base material of the present invention refers to the test methods in "Highway Engineering Inorganic Binder Stable Material Test Regulations" and "Highway Engineering Aggregate Experiment Regulations" to carry out particle size analysis test, standard compaction experiment, unconfined compressive strength experiment and Bending and tensile strength test, etc.

[0029] On the basis of 5 parts of fixed cement, 30 parts of crushed stone, and 68 parts of iron tailings (with a particle size below 0.074mm and greater than 7%), the dosage of the new soil stabilizer is 0.2 parts, 0.8 parts, 1.2 parts, 1.8 parts, and 2.0 parts were subjected to the unconfined compressive strength test, and the above-mentioned parts are parts by mass. The results obtained are shown in the table below:

[0030] Curing agent dosage (parts)

0.2

0.8

1.2

1.8

2.0

7-day unconfined compressive strength (MPa)

3.5

3.64

3.8...

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Abstract

The invention discloses a method for preparing a pavement base material by stabilizing iron tailings by a novel soil stabilizer. The preparation method of the novel soil stabilizer comprises the following steps: diluting a TerranZyme bio-enzyme soil stabilizer with water by 10-100 times, adding solid CaCl2 with mass being 5%-10% that of diluting liquid and acidified water glass with mass being 5%-10% that of the diluting liquid, heating to 30-50 DEG C by microwaves, reacting for 20-60 minutes, and performing mixed modification to obtain the novel soil stabilizer. The novel soil stabilizer can be used for stabilizing the iron tailings to prepare the pavement base material. The method for preparing the pavement base material comprises the following steps: uniformly mixing cement, gravel and the iron tailings with the novel soil stabilizer according to a mass ratio of 5: 30: 68: 2 to obtain an inorganic mixture, adding 1.5kg/m<3> of polypropylene fibers, and uniformly mixing to obtain the pavement base material. All technical indexes of the pavement base material meet the national standard requirements, the utilization rate of the iron tailings is high, the environmental problem caused by piling of a large quantity of the iron tailings and mining of pavement gravel materials is solved, and economic benefits are obtained.

Description

technical field [0001] The invention relates to the utilization of iron tailings and road construction, in particular to a method for preparing pavement base materials by stabilizing iron tailings with a novel soil curing agent. Background technique [0002] Over the past 30 years, my country has made great achievements in the field of economic construction, but it has been accompanied by a large amount of consumption of various resources, solid waste, and a large amount of waste water and waste gas emissions. The environment poses a huge threat. Taking iron tailings as an example, iron tailings refers to the solid waste left after the iron ore concentrator crushes and grinds the raw iron ore under a specific process, and then selects the valuable metal iron element. Concentrates correspond. According to the report of "China Environmental Statistical Yearbook - 2011", my country's iron ore mining and dressing industry produced a total of 319.6887 million tons of industrial ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K17/00C04B28/00C04B14/02C04B18/12C04B16/06C04B24/12C04B22/08
CPCY02W30/91
Inventor 易龙生万磊易晨星冯泽平王三海赵伟刘世军
Owner CENT SOUTH UNIV
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