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Asphalt concrete tracking-resisting modifier

An asphalt concrete and anti-rutting technology, applied in the field of materials, can solve problems such as inability to use large areas, increase construction costs, and complicated process, and achieve the effects of expanding viscoelasticity, increasing road bearing capacity, and improving high-temperature stability

Inactive Publication Date: 2008-07-02
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, foreign products are expensive, resulting in a substantial increase in construction costs, and cannot be used on a large scale
[0005] Chinese patent application CN1887951 (disclosure date 20070103) "high-grade asphalt pavement anti-rutting admixture" has announced a kind of anti-rutting modifier, and this anti-rutting admixture is made of low-density polyethylene, high-density polyethylene, petroleum asphalt and algal silica Composed of soil, the product has good waterproof and wear resistance and fast forming speed; its disadvantages are: complicated process and high cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Taking the production of 1000g asphalt concrete anti-rutting modifier as an example, the amount of each raw material is as follows (regenerated low-density polyethylene, tackifier, activated rubber powder, all are commercially available):

[0029] Regenerated low-density polyethylene (melt flow rate 0.3 ~ 0.8g / 10min) 800g,

[0030] Petroleum resin (tackifier) ​​150g,

[0031] Activated rubber powder 50g.

[0032] The preparation method of the above-mentioned asphalt concrete anti-rutting modifier is as follows: After mixing the above-mentioned regenerated low-density polyethylene, petroleum resin, and activated rubber powder at room temperature, they are put into a twin-screw extruder, and the starting blending temperature is controlled at 140 ° C. The mixture Extrude and granulate through an extruder, and cool to room temperature to obtain this product.

[0033] Since recycled polyethylene has no standardized name, the type of polyethylene used is defined by the melt...

Embodiment 2

[0035] Taking the production of 1000g asphalt concrete anti-rutting modifier as an example, the dosage of each component is as follows:

[0036] Regenerated low-density polyethylene (melt flow rate 0.6-0.8g / 10min) 650g,

[0037] Rosin resin 300g,

[0038] Activated rubber powder 50g.

[0039] The preparation method of the above-mentioned anti-rutting modifier for asphalt concrete is as follows: After mixing the recycled low-density polyethylene, rosin resin, and activated rubber powder in proportion at room temperature, put them into a twin-screw extruder, and control the blending temperature at 150°C when starting the machine. The mixture is extruded through an extruder, cooled to normal temperature and granulated to obtain the product.

Embodiment 3

[0041] Taking the production of 1000g asphalt concrete anti-rutting modifier as an example, the dosage of each component is as follows:

[0042] Recycled Low Density Polyethylene 700g,

[0043] Rosin resin 300g.

[0044] The preparation method of the above-mentioned asphalt concrete anti-rutting modifier is as follows: After mixing the recycled low-density polyethylene and rosin resin in proportion at room temperature, put them into the twin-screw extruder, start the blending temperature to control 160 ° C, and the mixture is extruded Machine extruded granulation, cooled to normal temperature to obtain asphalt concrete anti-rutting modifier.

[0045] The present invention proves to have good effects through a large number of tests in the laboratory. The test was carried out in accordance with the "Test Regulations for Asphalt and Asphalt Mixtures in Highway Engineering" (JTJ052-2000), and the technical indicators were compared with the "Technical Specifications for Construct...

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Abstract

The invention relates to a track resistant modifying agent used in asphalt concrete. The asphalt concrete track resistant modifying agent is characterized in that the asphalt concrete track resistant modifying agent consists of raw materials with the weight portion ration of 65 to 80 portions of low density polyethylene, 10 to 30 portions of anchoring agent, and 0 to 5 portions of activated rubber powder. The anchoring agent is petroleum resin or abietic resin. The invention has inexpensive price and excellent performance, and can improve the stability of the asphalt concrete at high temperature, enhance pavement bearing capacity and prolong service life of the pavement.

Description

technical field [0001] The invention belongs to the technical field of materials, and in particular relates to an anti-rutting modifier used in asphalt concrete. technical background [0002] Rutting is a permanent deformation produced on the wheel track belt of the roadway, which is composed of the depression of the wheel track and the bulge on both sides. According to the different formation processes of ruts, ruts can be divided into three types: instability ruts, structural ruts, and wear ruts. Relevant data studies show that the most serious one is the unstable rut. Unstable rutting means that when the high-temperature stability of the asphalt mixture is insufficient, the asphalt pavement structure layer is under the action of the wheel load, and the internal material is displaced laterally due to the flow and forms a depression at the wheel track. [0003] The appearance of ruts has seriously affected the service life and service quality of the road surface, and brou...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06E01C7/26C08L57/02C08L93/04C08L17/00
Inventor 丁庆军刘祖国胡曙光方杨黄绍龙刘新权黄跃吕林女王发洲何永佳
Owner WUHAN UNIV OF TECH
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