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Asphalt concrete using alkaline slag regeneration micro powder as filling materials and preparation method thereof

A technology of asphalt concrete and recycled micropowder, applied in the field of construction industry, can solve the problems of polluting the environment and occupation of farmland by alkali residue, and achieve the effects of improving project quality, increasing added value, and reducing the occupation of land resources.

Inactive Publication Date: 2017-10-03
HUAIYIN INSTITUTE OF TECHNOLOGY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Alkali slag occupies a large amount of farmland and seriously pollutes the environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Change 10% ore powder in comparative example 1 into 8% alkali slag, 2% ore powder, and all the other components are the same as comparative example 1, and alkali slag moisture content is 10-15%, and density is 0.87-1g / cm , broken, Crushing, fineness modulus 1-1.3.

[0038] The steps to add are as follows:

[0039] (1) Put the industrial alkali slag in the air and dry it in an oven at about 115°C until the moisture content reaches 10-15%;

[0040] (2) Add the alkali slag of step (1) in the bituminous concrete of above-mentioned comparative example, stir;

[0041] To measure the stability and flow value, the experimental data are as follows:

[0042] Asphalt Concrete Test Data Sheet

[0043] Stability (kN)

Embodiment 2

[0045] Change the 10% ore powder in Comparative Example 1 to 10% alkali slag, and the remaining components are the same as Comparative Example 1, and the addition steps are the same as in Example 1. The measurement of stability and flow value is carried out. The experimental data are as follows:

[0046] Stability (kN)

Embodiment 3

[0048] Change the 10% mineral powder and 22% sand in Comparative Example 1 to 12% alkali slag and 20% sand, and the remaining components are the same as Comparative Example 1, and the addition steps are the same as Example 1. The measurement of stability and flow value is carried out in the experiment. Data are as follows:

[0049] Stability (kN)

Flow value(mm)

Density (g / cm 3 )

13.17

3.065

2.258

[0050] Comprehensive embodiment 1 to 3, draw the following conclusions:

[0051] The stability of industrial alkali slag recycled micropowder filler asphalt concrete is significantly higher than that of blank asphalt concrete without alkali slag by 40% to 50%, and the flow value is 20% to 25% lower than that of blank asphalt concrete without alkali slag.

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Abstract

The invention relates to asphalt concrete using alkaline slag regeneration micro powder as filling materials and a preparation method thereof. The asphalt concrete is formed by mixing the following ingredients in percentage by weight: 8 to 12 percent of alkaline slag, 0 to 2 percent of mineral powder, 50 to 54 percent of clastic rock, 10 to 12 percent of stone chips, 21 to 23 percent of sand and 4 to 6 percent of asphalt, and the total percent is 100 percent. The method comprises the steps of material pretreatment, material preparation, material stirring and asphalt concrete forming. The industrial alkaline slag micro powder is used as asphalt concrete regeneration filling materials; the bonding force of the asphalt concrete can be effectively improved, so that the intensity of the asphalt concrete can be improved; the anti-peeling performance is improved; the stability flowing value is superior to that of ordinary asphalt concrete; the stability degree of the asphalt concrete can be greatly improved; the resource utilization of the industrial solid waste slag can be realized.

Description

technical field [0001] The invention relates to the technical field of construction industry, in particular to asphalt concrete with alkali slag regenerated fine powder as filler and a preparation method thereof. Background technique [0002] The combination of asphalt and aggregate material (eg, sand, gravel, gravel, or mixtures thereof) is known as "asphalt concrete." According to the degree of density of the mixture, it can be divided into dense gradation, semi-open gradation and open gradation. The open gradation mixture is also called asphalt macadam. Among them, the hot-mixed and hot-paved densely graded crushed stone mixture is durable, high-strength, and good in integrity. It is a representative material for building high-grade asphalt pavements and is the most widely used. Asphalt pavement is various types of pavement formed by paving and rolling asphalt concrete. Asphalt concrete, as an asphalt pavement material, has to bear the repeated action of running vehicle...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B26/26C04B111/20
CPCC04B26/26C04B2111/00017C04B2111/0075C04B2111/20C04B2111/2038C04B2201/20C04B2201/50C04B18/0418C04B18/141C04B14/02C04B14/06C04B20/0076
Inventor 张渊王颖丽龚俊杰陈永贵
Owner HUAIYIN INSTITUTE OF TECHNOLOGY
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