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A kind of road petroleum asphalt anti-stripping agent and preparation method thereof

A technology of road petroleum asphalt and anti-stripping agent, which is applied in the field of road construction materials and can solve problems such as high cost, poor thermal stability, and non-environmental protection

Active Publication Date: 2021-06-08
HENAN UNIV OF URBAN CONSTR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Commonly used anti-stripping agents are mainly organic and inorganic. Organic products mainly include phosphates and amines. Due to the poor thermal stability of organic anti-stripping agents, they are easy to decompose at high temperatures and are not environmentally friendly, which limits their use; Inorganic anti-stripping agents mainly include lime, cement, etc. Although they have good temperature stability, their high cost limits their use

Method used

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  • A kind of road petroleum asphalt anti-stripping agent and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0023] The composition of road petroleum asphalt anti-stripping agent: red mud 50wt%, alkali residue 30wt%, lime 15wt%, calcium stearate 5wt%.

[0024] The dosage of the road petroleum asphalt anti-stripping agent accounts for 3wt% of the total mass of the asphalt mixture.

[0025] Asphalt: Shell No. 70 ordinary road petroleum asphalt;

[0026] Aggregate: Granite rolling;

[0027] Mineral powder: limestone ground fine stone powder;

[0028] Composition of asphalt mixture: Fine-grained densely graded asphalt mixture DAC-13 is used, and the mixing ratio is shown in Table 1; the amount of asphalt accounts for 5.0wt% of the total mass of the asphalt mixture.

[0029] Table 1: DAC-13 type asphalt mix ratio of embodiment 1

[0030] Mesh size (mm) 16 13.2 9.5 4.75 2.36 1.18 0.6 0.3 0.15 0.075 Passing percentage (%) 100 95 77 53 37 27 19 14 10 5

[0031] The aging test method of ordinary asphalt and the asphalt mixed with the anti-stripping ag...

Embodiment 2

[0033] The composition of road petroleum asphalt anti-stripping agent: red mud 60wt%, alkali residue 20wt%, lime 16wt%, calcium stearate 4wt%;

[0034] The amount of road petroleum asphalt anti-stripping agent accounts for 2wt% of the total mass of asphalt mixture.

[0035] Asphalt: Shell No. 70 ordinary road petroleum asphalt;

[0036] Aggregate: Granite rolling;

[0037] Mineral powder: limestone ground fine stone powder;

[0038] Composition of asphalt mixture: fine-grained densely graded asphalt mixture DAC-13 type is used, and the mixing ratio is shown in Table 2; the amount of asphalt accounts for 4.9wt% of the total mass of the asphalt mixture.

[0039] Table 2: DAC-13 type asphalt mix ratio of embodiment 2

[0040] Mesh size (mm) 16 13.2 9.5 4.75 2.36 1.18 0.6 0.3 0.15 0.075 Passing percentage (%) 100 94 75 51 35 25 17 12 9 4.5

[0041] The aging test method of ordinary asphalt and the asphalt mixed with the anti-stripping agen...

Embodiment 3

[0043] The composition of road petroleum asphalt anti-stripping agent: red mud 70wt%, alkali residue 15wt%, lime 12wt%, calcium stearate 3wt%;

[0044] The amount of road petroleum asphalt anti-stripping agent accounts for 4wt% of the total mass of asphalt mixture.

[0045] Asphalt: Shell No. 70 ordinary road petroleum asphalt;

[0046] Aggregate: Granite rolling;

[0047] Mineral powder: limestone ground fine stone powder;

[0048] Composition of asphalt mixture: Fine-grained densely graded asphalt mixture DAC-13 is used, and the mixing ratio is shown in Table 3; the amount of asphalt accounts for 5.1wt% of the total mass of the asphalt mixture.

[0049] Table 3: DAC-13 type asphalt mix ratio of embodiment 3

[0050] Mesh size (mm) 16 13.2 9.5 4.75 2.36 1.18 0.6 0.3 0.15 0.075 Passing percentage (%) 100 96 79 55 39 29 21 16 11 5.5

[0051] The aging test method of ordinary asphalt and the asphalt mixed with the anti-stripping agent of...

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Abstract

The invention discloses a road petroleum asphalt anti-stripping agent, which is composed of the following components in weight percentage: 50-70 wt% of red mud, 15-30 wt% of alkali residue, 10-20 wt% of lime, and calcium stearate 3~5wt%. Red mud is industrial solid waste discharged after extracting alumina from bauxite. It is obtained after drying and grinding, and the content of calcium oxide is not less than 30wt%. The waste residue is obtained after drying and grinding. When preparing the asphalt mixture, the wet mixing method is adopted, that is, after the asphalt and the coarse and fine aggregates are mixed evenly, the anti-stripping agent is added together with the mineral powder and mixed evenly. The dosage of the anti-stripping agent is 2-4wt% of the total mass of the asphalt mixture The production process of the asphalt mixture with anti-stripping agent is the same as that of ordinary asphalt mixture, and no new equipment is needed, which can significantly improve the water stability of asphalt mixture and the adhesion between asphalt and aggregate, especially It has obvious improvement effect on acidic aggregates such as granite.

Description

Technical field: [0001] The invention belongs to the field of road building materials, and in particular relates to a road petroleum asphalt anti-stripping agent and a preparation method thereof. Background technique: [0002] In asphalt pavement, since road petroleum asphalt contains acidic components such as asphalt acid and shows weak acidity, in order to enhance the adhesion between asphalt and aggregates and the water stability of asphalt mixtures, alkaline or neutral aggregates are usually used in engineering. However, with the rapid development of the highway industry, especially the development of high-grade highways, the demand for high-quality aggregates is also increasing, resulting in a continuous reduction in the storage of medium-alkaline aggregates , the use of acidic aggregates is gradually increasing, such as granite, etc., due to the adhesion between acidic aggregates and asphalt and the low water stability of asphalt mixtures limit its use, in order to imp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B24/08C04B18/04C04B103/60
CPCC04B18/0409C04B18/0481C04B40/0046C04B2103/60C04B22/064C04B24/085C04B26/26Y02W30/91
Inventor 姚立阳宋新生高文英沈凯程秦崇森陶富有焦良韦张永存李惠霞王可符浩葛书勋
Owner HENAN UNIV OF URBAN CONSTR