A kind of anti-high temperature wet-dry method modified asphalt mixture and its preparation method and application

A technology of modified asphalt and mixture, which is applied to the coagulation pavement, roads, buildings and other directions of on-site paving, can solve the problems of affecting the driving effect and highway performance, poor mechanized construction performance, resistance to rutting and water damage, etc. The effect of reducing maintenance work, improving mechanical construction performance and preventing early damage

Active Publication Date: 2021-09-24
云南阳光道桥股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The softening point of asphalt No. 40-60 is 48°C-56°C; the softening point of asphalt No. 50-70 is 46°C-54°C; or the softening point of modified asphalt is lower than the temperature of asphalt pavement, the mechanized construction performance is poor and the dynamic stability is low. It is difficult to meet the requirements of asphalt pavement in high temperature climate. Deep ruts often appear on asphalt pavement under high temperature or high temperature and heavy load in a short period of time, which affects the driving effect and road performance. In order to ensure the mechanized construction quality of asphalt pavement under high temperature, For normal use and long life, it is necessary to solve the problem of anti-rutting and water damage of asphalt pavement under high temperature, rainy and heavy load

Method used

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  • A kind of anti-high temperature wet-dry method modified asphalt mixture and its preparation method and application

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Experimental program
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Effect test

Embodiment 1

[0049] The high temperature resistant wet-dry method modified asphalt mixture of this embodiment includes the following materials in weight percentage:

[0050] Material A: The particle size 16~9.5mm39.953%, 9.5~4.75mm28.537%, 4.75~2.36mm4.756%, 2.36~0mm17.122% crushed stone produced by the Bangalore quarry in Pakistan and the particle size is less than 0.6 mm mineral powder 4.756% total 95.124%;

[0051] Material B: 4.2% of 60-70 bitumen produced in Pakistan;

[0052] Material C: SBS 0.165%;

[0053] Material D: rubber oil 0.070%;

[0054] Material E: stabilizer (petroleum resin + sulfur, the ratio is 1:0.72) 0.011%;

[0055] Material G: rock asphalt + diatomaceous earth 0.430%. Rock asphalt + diatomaceous earth, rock asphalt: diatomaceous earth by weight ratio = 1:1.

[0056] The preparation method of the high temperature resistant wet-dry method modified asphalt mixture of the present embodiment comprises the following steps:

[0057] Step (1), heating the 60-70 asphalt...

Embodiment 2

[0073] The high temperature resistant wet-dry method modified asphalt mixture of this embodiment includes the following materials in weight percentage:

[0074] Material A: The particle size 16~9.5mm40.463%, 9.5~4.75mm27.609%, 4.75~2.36mm6.188%, 2.36~0mm18.089% crushed stone produced by Pakistan Bangalore quarry and the particle size is less than 0.6 mm mineral powder 2.856% total 95.205%;

[0075] Material B: 4.1% of 60-70 bitumen produced in Pakistan;

[0076] Material C: SBS 0.155%;

[0077] Material D: rubber oil 0.080%;

[0078] Material E: stabilizer (petroleum resin + sulfur, the ratio is 1:0.72) 0.010%;

[0079] Material G: rock asphalt + diatomaceous earth 0.450%. Rock bitumen + diatomaceous earth, rock bitumen: diatomite by weight ratio = 1:0.8.

[0080] The preparation method of the high temperature resistant wet-dry method modified asphalt mixture of the present embodiment comprises the following steps:

[0081] Step (1), heating the 60-70 asphalt produced in...

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Abstract

The invention discloses a modified asphalt mixture resistant to high temperature wet-dry method and its preparation method and application, aiming to provide a modified asphalt mixture preparation with good performance, economy, mechanized construction, high temperature and water damage resistance, and rutting resistance Construction method. The modified asphalt mixture resistant to high temperature wet-dry method includes the following materials in weight percentage: 95.921%~94.671% of stone materials of various specifications; 3.8%~4.5% of base asphalt; 0.12%~0.185% of SBS; 0.015%~0.090% of rubber oil; Agent 0.02% ~ 0.014%; rock asphalt + diatomaceous earth 0.133% ~ 0.540%. The paved asphalt concrete pavement paved by the invention is resistant to high temperature rutting and water damage, can prevent early damage, reduce repair and maintenance costs, and prolong the service life of the road.

Description

technical field [0001] The invention relates to the field of highway traffic asphalt pavement construction, in particular to a high-temperature-resistant wet-dry method modified asphalt mixture and its preparation method and application. Background technique [0002] Transportation infrastructure asphalt concrete pavement projects are located in South Asia, the Middle East, Southeast Asia, Africa and other regions with hot and rainy climates. For example, the southern part of Pakistan is tropical and has obvious monsoon climate characteristics. The minimum temperature is around 5°C and the maximum temperature is around 55°C. The high temperature lasts for a long time, and the temperature of the 15cm~30cm asphalt pavement is as high as about 85°C. The softening point of asphalt No. 40-60 is 48°C-56°C; the softening point of asphalt No. 50-70 is 46°C-54°C; or the softening point of modified asphalt is lower than the temperature of asphalt pavement, the mechanized construction ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B26/26E01C7/18
CPCC04B26/26C04B2111/0075E01C7/18C04B18/12C04B2103/0068C04B24/00C04B24/24C04B22/02C04B14/08
Inventor 荀家正杨忠艳李烨杨启茂李荣盛
Owner 云南阳光道桥股份有限公司
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