A kind of high modulus rubber asphalt mixture and preparation method thereof

A rubber asphalt, high modulus technology, applied in the field of road engineering, can solve the problems of poor high temperature resistance of concrete pavement, large emission of harmful gases, poor thermal storage stability, etc., achieve ultra-long service life, improve anti-rutting ability, fatigue good performance

Active Publication Date: 2019-12-31
江苏一诺路桥工程检测有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] Purpose of the invention: In order to solve the above problems, the present invention provides a high modulus rubber asphalt mixture and its preparation method, which can improve the permanent deformation resistance of the asphalt pavement, reduce rutting, prolong the service life of the pavement and drive safety and comfort , to solve the problem of poor heat storage stability of existing rubber asphalt and rapid index attenuation, as well as the difference in high temperature resistance of concrete pavement, easy deformation and rutting under heavy traffic, large ratio of mixture to asphalt, poor construction workability, and large emissions of harmful gases on site And other issues

Method used

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  • A kind of high modulus rubber asphalt mixture and preparation method thereof
  • A kind of high modulus rubber asphalt mixture and preparation method thereof
  • A kind of high modulus rubber asphalt mixture and preparation method thereof

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Embodiment 1

[0026] The project overview of this embodiment is: the test section of the high modulus rubber asphalt mixture HMAC-20 is selected at the lower layer of the special road in the Sheping Line Mining Area, Langxi County, Xuancheng City, Anhui Province. The vehicle speed is 60Km / h, and the traffic load is mainly stone transport vehicles with a total weight of more than 120t. The average daily traffic load is 40,000 tons. The pavement structure adopts: 4cm industrial stable rubber asphalt SUP-13+6cm high modulus rubber asphalt mixture Material HMAC-20+1cm rubber asphalt stress absorbing layer. The lower layer adopts the high modulus rubber asphalt mixture HMAC-20 of the present invention.

[0027] The hard asphalt used in the test road is TNH-25 straight road petroleum asphalt produced by Jiangsu Tiannuo Road Material Technology Co., Ltd., and the performance indicators are shown in Table 1.

[0028] Table 1 Performance indicators of TNH-25 hard asphalt

[0029]

[0030] The w...

Embodiment 2

[0053] The project overview of this embodiment is: the high modulus rubber asphalt mixture HMAC-20 test section is selected in the middle surface course of the Jiangsu section of the Xuzhou-Mingguang Expressway, with a total length of 800 meters. The project adopts expressway standards, two-way four-lane, and the design speed 120Km / h, the pavement structure adopts: 4cm asphalt mixture (SMA-13) + 6cm asphalt mixture (HMAC-20) + 8cm asphalt mixture (SUP-25). The middle surface layer adopts the high modulus rubber asphalt mixture HMAC-20 of the present invention.

[0054] The hard asphalt used in the test road is TNH-35 straight road petroleum asphalt produced by Jiangsu Tiannuo Road Material Technology Co., Ltd., and the performance indicators are shown in Table 6.

[0055] Table 6 TNH-35 hard asphalt performance index

[0056]

[0057]

[0058] Waste tire rubber powder is commercially available 60-mesh rubber powder with a carbon black content of 30.1%, ash content of 6....

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Abstract

The invention discloses a high-modulus rubber asphalt mixture and a preparation method thereof, and belongs to the technical field of road engineering. The high-modulus rubber asphalt mixture comprises, by weight, 100 parts of aggregates, 0.5-3 parts of mineral powder, 3-6 parts of hard asphalt, 0.5-1.5 parts of waste tire powder and 0.1-0.5 part of a catalytic degradant. The invention also provides a preparation method of the high-modulus rubber asphalt mixture. According to the invention, permanent deformation resistance of an asphalt road can be raised; rutting diseases are less; service life of pavements is prolonged and traffic safety and comfort are enhanced; and problem that existing rubber asphalt has poor storage stability and fast index decay, concrete pavements have poor high temperature resistance, are easy to deform under heavy traffic and is easy to form ruts, a mixture has high asphalt-aggregate ratio, construction workability is poor and field harmful gas emission loadis large is solved.

Description

technical field [0001] The invention belongs to the technical field of road engineering, and relates to a rubber-asphalt mixture, in particular to a high-modulus rubber-asphalt mixture and a preparation method thereof. Background technique [0002] With the rapid development of my country's transportation industry, the traffic volume of highways is increasing, the number of heavy vehicles is increasing rapidly, heavy loads, overloading, and channelized traffic are becoming more and more serious, and continuous high-temperature weather occurs frequently. Many factors lead to high-temperature stability of the road surface. Defects such as rutting, shifting, and hugging caused by insufficiency are the main forms of early-stage diseases of asphalt pavements of all grades of roads in my country. These early permanent deformation diseases will affect the flatness of the road surface, reduce the overall strength of the surface layer and the pavement structure, reduce the anti-skid a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B26/26
CPCC04B26/26C04B2111/0075C04B2201/30C04B18/22C04B14/02C04B14/28C04B2103/0068
Inventor 杨刚龙彪朱伟伟肖护兵胡亮
Owner 江苏一诺路桥工程检测有限公司
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