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Modified bituminous concrete with self-regulating temperature function

A technology of modified asphalt and self-controlling temperature, which is applied in the field of road asphalt to achieve the effects of low production cost, reduction of rutting diseases, and reduction of road surface temperature

Active Publication Date: 2015-06-10
CHANGAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Engineering practice has proved that the application of these technologies cannot fundamentally solve the problems of rutting and low temperature diseases

Method used

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  • Modified bituminous concrete with self-regulating temperature function
  • Modified bituminous concrete with self-regulating temperature function
  • Modified bituminous concrete with self-regulating temperature function

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The modified asphalt concrete with self-temperature control function in this embodiment is made of the following raw materials in parts by weight: 100 parts of mineral aggregate, 4.6 parts of asphalt, 1 part of sepiolite powder, 1.2 parts of palygorskite powder, and 0.03 part of coupling agent; The asphalt is SBS modified asphalt, the coupling agent is a titanate coupling agent, the particle diameters of the sepiolite powder and palygorskite powder are both less than 0.075mm, and the gradation type of the mineral material is AM- Type 13 (see Table 1 for specific gradation composition).

[0031] Table 1 AM-13 type gradation composition

[0032]

[0033] The preparation method of the present embodiment modified asphalt concrete comprises the following steps:

[0034] Step 1. Mix the sepiolite powder and palygorskite powder evenly, add them into the coupling agent and stir evenly, then place them in a drying oven, and dry them at a temperature of 180°C for 3 hours to o...

Embodiment 2

[0038] The modified asphalt concrete with self-temperature control function in this embodiment is made of the following raw materials in parts by weight: 100 parts of mineral aggregate, 3 parts of asphalt, 2.4 parts of sepiolite, 0.1 part of palygorskite, and 0.01 part of coupling agent; The asphalt is road petroleum asphalt, the coupling agent is an aluminate coupling agent, the particle diameters of the sepiolite powder and palygorskite powder are both less than 0.075mm, and the gradation type of the mineral material is GAC-13 type (see Table 2 for specific gradation composition).

[0039] Table 2 GAC-13 type gradation composition

[0040]

[0041] The preparation method of the present embodiment modified asphalt concrete comprises the following steps:

[0042] Step 1. Mix the sepiolite powder and palygorskite powder evenly, add them to the coupling agent and stir evenly, then place them in a drying oven, and dry them for 2 hours at a temperature of 160°C to obtain a mod...

Embodiment 3

[0046] The modified asphalt concrete with road surface cooling function in this embodiment is made of the following raw materials in parts by weight: 100 parts of mineral aggregate, 7 parts of asphalt, 0.2 part of sepiolite, 2.0 parts of palygorskite, and 0.06 part of coupling agent; The asphalt is coal tar pitch, the coupling agent is an aluminate coupling agent, the particle diameters of the sepiolite powder and palygorskite powder are all less than 0.075mm, and the gradation type of the mineral material is AC-13 type ( The specific gradation composition is shown in Table 3).

[0047] Table 3 AC-13 type gradation composition

[0048]

[0049] The preparation method of the present embodiment modified asphalt concrete comprises the following steps:

[0050] Step 1. Mix the sepiolite powder and palygorskite powder evenly, add them into the coupling agent and stir evenly, then place them in a drying oven, and dry them at a temperature of 180°C for 3 hours to obtain a modifie...

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Abstract

The invention provides modified bituminous concrete with a self-regulating temperature function. The modified bituminous concrete is prepared from the following raw materials in parts by weight: 100 parts of mineral aggregate, 3-7 parts of asphalt, 0.2-2.4 parts of sepiolite powder, 0.1-2.0 parts of palygorskite powder, and 0.01-0.06 part of coupling agent, wherein the coupling agent is a titanate coupling agent or an aluminate coupling agent; the aggregate grading type of the mineral aggregate is AM-13, GAC-13, AC-13, SMA-13 or OGFC-13. According to the modified bituminous concrete provided by the invention, excellent characteristics of sepiolite and palygorskite are reasonably utilized; the usability of a bituminous concrete pavement can be effectively improved; the temperature of the bituminous concrete pavement can be reduced under a high-temperature condition; a track disease is reduced; the bituminous concrete pavement can keep high temperature to resist a low-temperature disease under a low-temperature condition.

Description

technical field [0001] The invention belongs to the technical field of road asphalt, in particular to a modified asphalt concrete with self-temperature control function. Background technique [0002] Asphalt concrete pavement is the most important form of road pavement. During use, due to its own characteristics, there are relatively common problems of high temperature rutting and low temperature cracking. These two temperature-related diseases account for 90% of asphalt pavement diseases. The above will seriously affect the driving comfort and road service quality. The cracks produced by low temperature cracking will also lead to stress concentration under the driving load and more serious cracks. At the same time, the existence of cracks can easily lead to water infiltration, resulting in The phenomenon of water damage will destroy the pavement structure, and such a reciprocating cycle will seriously affect the service life of the road. Therefore, solving the temperature-...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B26/26
Inventor 王朝辉毕玉峰刘伟孙晓龙王玉飞王选仓
Owner CHANGAN UNIV
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