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Durable high-modulus asphalt mixture based on hard asphalt particles

A technology of asphalt mixture and hard asphalt, which is applied in the field of road paving materials, can solve the problems that affect the popularization and application of high modulus asphalt mixture, and the overall cost is high, so as to improve the shear and compression resistance, prolong the service life and maintain Good cycle and high temperature performance

Inactive Publication Date: 2014-02-19
JIANGSU TRANSPORTATION RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the use of special materials such as additives, the overall cost is high, which affects the popularization and application of high modulus asphalt mixture

Method used

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  • Durable high-modulus asphalt mixture based on hard asphalt particles
  • Durable high-modulus asphalt mixture based on hard asphalt particles
  • Durable high-modulus asphalt mixture based on hard asphalt particles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The asphalt mixture in this example is mainly composed of 100 parts by mass of mineral material and 5.4 parts by mass of asphalt. Asphalt particles = 7:3), mineral materials include limestone aggregate and limestone powder, limestone aggregate and limestone powder account for 96.5% and 3.5% of the mineral mass respectively, limestone aggregates are divided according to aggregate particle size There are four groups of aggregates: the particle size of the first group: 10-15mm; the particle size of the second group: 5-10mm; the particle size of the third group: 3-5mm; the particle size of the fourth group: 0~3mm, the percentages of the mass of the above four groups of aggregates in the total mass of mineral materials are: 30%, 19%, 14.5%, 33%, the effective density of the total mineral material ρ G =2.702g / cm 3 , and its gradation is shown in Table 1.

[0022] Table 1 Grading table

[0023]

[0024] Put the mineral material configured according to the above gradation...

Embodiment 2

[0059] The asphalt mixture in this example is mainly composed of 100 parts by mass of mineral material and 5.5 parts by mass of asphalt. The asphalt is composed of two components. The petroleum asphalt is obtained by compounding Sinopec No. 70 road petroleum asphalt and hard asphalt particles. No. 15 asphalt, the mineral materials include limestone aggregate and limestone powder, the quality of limestone aggregate and limestone powder accounted for 97% and 3.0% of the mineral material respectively, limestone aggregate is divided into four groups of aggregates according to the aggregate particle size : The particle size of the first group of aggregates: 10-15mm; the particle size of the second group: 5-10mm; the particle size of the third group: 3-5mm; the particle size of the fourth group: 0-3mm, the above The percentages of the mass of the four groups of aggregates in the total mass of mineral materials are: 38%, 15%, 8%, and 36%, and the effective density of the total mineral...

Embodiment 3

[0096] The asphalt mixture in this example is mainly composed of 100 parts by mass of mineral material and 5.6 parts by mass of asphalt. Asphalt particles = 7:3), mineral materials include limestone aggregate and limestone powder, limestone aggregate and limestone powder account for 96% and 4% of the mineral material, limestone aggregates are divided according to aggregate particle size There are four groups of aggregates: the particle size of the first group: 10-15mm; the particle size of the second group: 5-10mm; the particle size of the third group: 3-5mm; the particle size of the fourth group: 0-3mm, the percentages of the mass of the above four groups of aggregates in the total mass of mineral materials are as follows: 36%, 15%, 13%, 33%, the effective density of the total mineral material ρ G =2.709g / cm 3 , and its gradation is shown in Table 17.

[0097] Table 17 Grading table

[0098]

[0099] Put the mineral material configured according to the above gradation i...

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Abstract

The invention discloses a durable high-modulus asphalt mixture based on hard asphalt particles. The asphalt mixture comprises 100 parts by mass of mineral aggregate and 5.3-5.7 parts by mass of asphalt, wherein the mineral aggregate comprises a limestone aggregate accounting for 96-98% of the total mass of the mineral aggregate, and limestone mineral powder accounting for 2-4% of the total mass of the mineral aggregate; and the asphalt is a compound of number 70 road petroleum asphalt and the hard asphalt particles. The asphalt mixture improves the gradation of the mineral aggregate, so that a coarse aggregate forms a good skeleton structure, and the shear property and the compressive property of the mixture are improved; and the property of asphalt adhesive cement in the mixture is improved by adding an appropriate amount of mineral powder, so that the surface of the mineral aggregate has appropriate asphalt membrane thickness. Therefore, the mixture is good in high temperature property, easy to compact, and excellent in fatigue resistance and durability; the capacity of a pavement for resisting damage of a track and the like can be improved if the mixture is used in a road middle surface course; the construction cost can be lowered; and the service life and the maintenance cycle of the pavement can be prolonged.

Description

technical field [0001] The invention relates to road paving materials, in particular to a durable high modulus asphalt mixture based on hard asphalt particles. Background technique [0002] High-modulus asphalt mixture originated in France. It is widely used in France due to its superior high-temperature stability and good fatigue resistance. It is also actively promoted in the United Kingdom, the United States and other countries. According to the definition in the French standard NFP98-140, asphalt concrete can only be called high modulus asphalt concrete if it meets the corresponding standards by using high modulus admixtures or using low-grade asphalt and other technologies. [0003] Rutting occurs in both the middle and lower layers of asphalt pavement, and the occurrence of rutting diseases in the middle layer is more common and more harmful. High modulus asphalt mixture is a main technical approach to improve the anti-rutting performance of heavy-duty traffic asphalt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B26/26C04B20/00C04B22/10
Inventor 张志祥关永胜韩超李小燕韦武举安丰伟
Owner JIANGSU TRANSPORTATION RES INST CO LTD
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