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High-performance foam warm mix asphalt and preparation method thereof

A technology of warm mix asphalt and foamed asphalt, applied in the field of high-performance foam warm mix asphalt and its preparation, can solve the problems of water stability and high temperature rutting resistance, reduce the adhesion between asphalt and stone interface, and increase the damage of asphalt pavement. Risks and other issues to improve water stability, high temperature rutting resistance, and reduce looseness

Active Publication Date: 2016-08-31
SHANDONG TRANSPORTATION INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, water and foam voids in foamed asphalt reduce the adhesion between asphalt and stone, resulting in a decline in the water stability and high-temperature anti-rutting performance of the foamed warm mix asphalt mixture, which increases the risk of damage to the asphalt pavement. risk

Method used

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  • High-performance foam warm mix asphalt and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] 【formula】

[0035] No. 70 road petroleum asphalt 100Kg; polyphosphoric acid 0.8Kg;

[0036] 1.5 Kg of diamine-type cationic asphalt emulsifier; 2 Kg of water.

[0037] 【Preparation】

[0038] (1) Heat the No. 70 road petroleum asphalt to 150°C;

[0039] (2) Add the formula amount of polyphosphoric acid into the hot asphalt and stir it thoroughly for 40 minutes;

[0040] (3) Add the stirred hot asphalt, water and diamine-type cationic asphalt emulsifier into the foaming device to form foamed asphalt in the foaming cavity;

[0041] (4) Immediately after the foamed asphalt is prepared, it is sprayed into the mixing tank and mixed with the aggregate to form an asphalt mixture.

[0042] Carry out relevant mixture performance tests, and at the same time take foamed asphalt samples for asphalt performance tests.

[0043] The foaming rate is 9 times, and the half-life is 12s.

Embodiment 2

[0045] 【formula】

[0046] No. 90 road petroleum asphalt 100Kg; polyphosphoric acid 1.5Kg;

[0047] 1 Kg of cetyltrimethylammonium bromide; 2.5Kg of water.

[0048] 【Preparation】

[0049] (1) Heat the No. 90 road petroleum asphalt to 160°C;

[0050] (2) Add the formula amount of polyphosphoric acid into the hot asphalt and stir it thoroughly for 50 minutes;

[0051] (3) Add the stirred hot asphalt, water and cetyltrimethylammonium bromide into the foaming device to make it form foamed asphalt in the foaming cavity;

[0052] (4) Immediately after the foamed asphalt is prepared, it is sprayed into the mixing tank and mixed with the aggregate to form an asphalt mixture.

[0053] Carry out relevant mixture performance tests, and at the same time take foamed asphalt samples for asphalt performance tests.

[0054] The foaming rate is 8.5 times, and the half-life is 11.6s.

Embodiment 3

[0056] 【formula】

[0057] No. 70 road petroleum asphalt 100Kg; polyphosphoric acid 0.5Kg;

[0058] Diamine type split cationic asphalt emulsifier 2 Kg; water 1.5Kg.

[0059] 【Preparation】

[0060] (1) Heat the No. 70 road petroleum asphalt to 140°C;

[0061] (2) Add the formula amount of polyphosphoric acid into the hot asphalt, and stir thoroughly for 60 minutes;

[0062] (3) Add the stirred hot asphalt, water and diamine-type cationic asphalt emulsifier into the foaming device to form foamed asphalt in the foaming cavity;

[0063] (4) Immediately after the foamed asphalt is prepared, it is sprayed into the mixing tank and mixed with the aggregate to form an asphalt mixture.

[0064] Carry out relevant mixture performance tests, and at the same time take foamed asphalt samples for asphalt performance tests.

[0065] The foaming rate is 8.7 times, and the half-life is 10.9s.

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Abstract

The invention discloses high-performance foam warm mix asphalt and a preparation method thereof, and belongs to the field of road engineering. The warm mix asphalt is prepared from a certain amount of petroleum asphalt, polyphosphoric acid, foaming agents and water. Compared with the prior art, the high-performance foam warm mix asphalt provided by the invention has the advantages that the water stability and the high-temperature trace-resistant performance of the foam warm mix asphalt mixture can be obviously improved; good popularization values are realized.

Description

technical field [0001] The invention relates to the field of road engineering, in particular to a high-performance foam warm-mix asphalt and a preparation method thereof. Background technique [0002] Foamed asphalt is to add a certain proportion of water to high temperature asphalt during the production process of hot mix asphalt, so that the asphalt is vaporized rapidly, and the volume expands rapidly to generate foamed asphalt, which is sprayed into the mixing tank and aggregate in the form of foamed asphalt Mixed into asphalt mixture. Foamed asphalt has lower viscosity than asphalt, and its workability is increased. It is easier to fully coat aggregates at different temperatures, which can improve the workability and compaction of hot-mix asphalt mixture. Foamed asphalt warm mixing technology does not require admixtures, and only improves the mixing workability and compaction characteristics of asphalt mixture through the principle of mechanical foaming. Therefore, it i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L95/00C08K3/32C08J9/06
CPCC08J9/06C08J2395/00C08K3/32C08K2003/329C08L2203/14C08L95/00Y02A30/30
Inventor 孙强韦金城鲁圣弟李阿坦董昭王卫彬韩文扬余四新付建村闫翔鹏
Owner SHANDONG TRANSPORTATION INST
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