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High-modulus bituminous concrete additive

An asphalt concrete and additive technology, applied in the field of asphalt pavement materials, can solve the problems of low-temperature cracks on the pavement, unfavorable popularization and application, and single product performance, so as to maintain the balance of natural landscape and ecological environment, low price, and water stability. and the effect of improving fatigue resistance

Active Publication Date: 2013-05-01
辽宁省交通科学研究院有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing problems are: the current additives are mainly aimed at anti-rutting, and polyethylene is used as the main raw material. The product performance is single and the adaptability is poor; the product price is high, which is not conducive to popularization and application; Low-temperature performance is poor, brittleness is high, and low-temperature cracks are prone to appear on the road surface

Method used

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  • High-modulus bituminous concrete additive
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] In the proportioning of the present embodiment, with 1.11kg as 1 part, the parts by weight of each component of the raw materials used are:

[0020] 68 parts of waste polyethylene

[0021] 10 parts polypropylene

[0022] 5 parts ethyl acetate

[0023] Dioctyl phthalate and 19 tert-dodecyl mercaptan are mixed in a mass ratio of 1:2 1 part

[0024] Preparation method: After mixing the above components evenly at room temperature, put them into a twin-screw extruder, control the blending temperature at 170°C when starting up, extrude semi-finished cylindrical strips, cool in a cooling water tank, enter a pelletizer, and cut evenly Granules with a length of 3 to 5 mm are obtained to obtain the product of the present invention.

[0025] The main detection indicators of the high modulus asphalt concrete additive prepared in this example are shown in Table 1.

[0026] Table 1 Inspection results of high modulus additive products

[0027] project Test conditions...

Embodiment 2

[0036] In the proportioning of the present embodiment, with 0.87kg as 1 part, the parts by weight of each component of the raw materials used are:

[0037] 90 parts of waste polyethylene

[0038] Polypropylene 18 parts

[0039] 6 parts ethyl acetate

[0040] Mix 1 part of diisobutyl phthalate and isooctyl 3-mercaptopropionate at a mass ratio of 1:3

[0041] Its preparation method is identical with embodiment 1. After testing, after adding the high modulus additive of the present invention, the dynamic modulus, dynamic stability, failure strain, residual strength ratio, and fatigue performance index of the asphalt mixture are compared with the test results without adding the product of the present invention. The indicators have been greatly improved.

Embodiment 3

[0043] In the proportioning of the present embodiment, with 0.80kg as 1 part, the parts by weight of each component of the raw materials used are:

[0044] Waste polyethylene 89 parts

[0045] Polypropylene 27 parts

[0046] 8 parts ethyl acetate

[0047] Diethylene glycol dibenzoate and ethyl mercaptan are mixed in a mass ratio of 1:4 1 part

[0048] Its preparation method is identical with embodiment 1. After testing, after adding the high modulus additive of the present invention, the dynamic modulus, dynamic stability, failure strain, residual strength ratio, and fatigue performance index of the asphalt mixture are compared with the test results without adding the product of the present invention. The indicators have been greatly improved.

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Abstract

The invention belongs to the technical field of bituminous road material and relates to a high-modulus bituminous concrete additive. The high-modulus bituminous concrete additive is composed of the following materials by mass: 60-90 parts of waste polyethylene, 10-30 parts of polypropylene, 5-10 parts of ethyl acetate and 0.5-1.5 parts of additive, wherein the additive is prepared by mixing a plasticizer and a modifier according to the mass ratio of 1:(2-4), wherein the plasticizer is dioctyl phthalate, diisobutyl phthalate or diethylene glycol dibenzoate, and the modifier is 19-tert-lauryl mercaptan, isooctyl 3-mercaptopropionate, ethanethio or dodecanethiol. The additive provided by the invention is convenient to use, low in cost and stable in performance, and the track prevention performance, the low temperature anti-cracking performance, the water stability and the anti-fatigue performance of the bituminous mixture are improved. Meanwhile, the waste plastic can be effectively recycled, the advantage of ecological environmental protection is achieved, the resource waste is directly reduced, the natural landscape and the ecological environment balance are greatly kept, and good social and environmental benefits are obtained.

Description

[0001] technical field [0002] The invention belongs to the technical field of asphalt pavement materials and relates to a high modulus asphalt concrete additive. Background technique [0003] In my country, with the continuous increase of traffic volume and vehicle axle load, and the continuous improvement of traffic channelization, the problem of rutting is becoming more and more serious. Rutting disease generally appears in the high temperature period of the first summer after opening to traffic; with the extension of time and the increase in the flow and number of heavy-duty vehicles, the rutting depth gradually increases, making the road surface roughness worse and causing other diseases , such as mesh cracks, potholes, potholes, etc. This not only affects the comfort and safety of driving, but also reduces the economic and social benefits, so the prevention and treatment of rutting disease is the primary problem in today's highway construction. Although the applicat...

Claims

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Application Information

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IPC IPC(8): C04B24/26C04B26/26
Inventor 刘云全范兴华王江淮李洪斌朱建平董景波赵东明
Owner 辽宁省交通科学研究院有限责任公司
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