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A reactive rubber asphalt densely graded concrete and its design method

A rubberized asphalt, reactive technology, applied in the field of reactive rubberized asphalt densely graded concrete and its design, can solve the problems of comparable, storage, processing, transportation, mixing constraints, difficult road performance, etc., to save energy, reduce Heavy pollution and improved road performance

Inactive Publication Date: 2015-09-30
SOUTHEAST UNIV
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  • Abstract
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Problems solved by technology

[0003] However, at present, the application of this traditional rubber asphalt is restricted by conditions such as the internal structure of rubber asphalt, processing technology, and transportation distance, and its application on roads is still in the exploratory stage.
In order to maintain a certain particle size of rubber powder in asphalt, the traditional rubber asphalt is greatly restricted in storage, processing, transportation and mixing, and the road performance of rubber asphalt concrete processed from this is also limited. Difficult to compare with modified asphalt concrete such as SBS

Method used

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  • A reactive rubber asphalt densely graded concrete and its design method
  • A reactive rubber asphalt densely graded concrete and its design method
  • A reactive rubber asphalt densely graded concrete and its design method

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preparation example Construction

[0033] In the preparation process of reactive rubber asphalt, the mass parts of base asphalt, waste tire rubber blocks and reaction aids meet the following requirements:

[0034] Base asphalt 100 parts;

[0035] Waste tire rubber blocks 50-75 parts;

[0036] Reaction auxiliary agent 1.5~3.5 parts.

[0037] The technical indicators of the reactive rubber asphalt are as follows:

[0038] Basic indicators: rotational viscosity at 180°C / Pa.s: 1.0~4.0; penetration at 25°C / 0.1mm: 40~80; softening point / °C: >47; elastic recovery / %: >55; ductility at 5°C / cm:>10;

[0039] Indexes after film oven aging: mass loss / %: 80; 5°C ductility ratio / %: >40.

[0040] The technical indicators of reactive rubber asphalt are collected in Table 1 as follows:

[0041] Table 1 Technical indicators of reactive rubber asphalt

[0042]

[0043] (2) Use aggregates with a particle size of <0.075mm as mineral powder, sieve the aggregates according to the mass ratio requirements, and use the sieved a...

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Abstract

The invention discloses reaction type rubber asphalt dense-graded concrete and a design method thereof. The reaction type rubber asphalt dense-graded concrete comprises the following components in parts by mass: 100 parts of aggregate, 4-8 parts of mineral powder and 4-6 parts of reaction type rubber asphalt; the maximum rated grain size of the aggregate is 16mm; the reaction type rubber asphalt is formed by directly swelling and developing waste tire rubber blocks less than 40cm and matrix asphalt under the action of reaction auxiliaries; the viscosity of the reaction type rubber asphalt is up to 3.5-4.5 Pa.s; and the designed void ratio of the mixture is 3.5-4.5%. The reaction type rubber asphalt dense-graded concrete can be applied to the road surfaces, airfield pavement, bridge deck pavement, and has the advantages of greatly improving the utilization rate of the waste tires and ensuring that the pavement performance of the asphalt mixture is improved.

Description

technical field [0001] The invention relates to a reactive rubber asphalt densely graded concrete and a design method thereof, belonging to the technology of hot mixing and hot laying asphalt concrete for paving roads such as highways, urban roads, tunnel pavements, and airport pavements. Background technique [0002] With the rapid development of the automobile industry, waste automobile tires in various countries in the world are increasing at an alarming rate, forming another serious pollution after white plastic, that is, "black pollution". At present, the first treatment measure for waste automobile tires in the world is retreading, and for those waste tires that are difficult to meet the use requirements after retreading, they are processed into rubber powder with different particle sizes and then processed into tire rubber. Of course, with the rapid development of asphalt pavement, waste rubber powder has also been applied to a certain extent in the field of road cons...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B26/26
Inventor 黄晓明李志栋
Owner SOUTHEAST UNIV
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