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High-modulus asphalt mixture based on old pavement milling material, and preparation method thereof

An asphalt mixture and high modulus technology, which is applied in the field of road engineering, can solve the problems of high production cost of high modulus asphalt mixture, poor regeneration quality of milling materials, and difficulty in popularization, and achieve outstanding economic benefits and low production costs. The effect of reducing and alleviating environmental pressure

Active Publication Date: 2018-02-16
江苏天诺环境工程技术开发有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Purpose of the invention: To solve the problems of poor regeneration quality of old asphalt pavement milling materials, low utilization rate and high production cost of high modulus asphalt mixture, which is difficult to popularize.

Method used

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  • High-modulus asphalt mixture based on old pavement milling material, and preparation method thereof
  • High-modulus asphalt mixture based on old pavement milling material, and preparation method thereof
  • High-modulus asphalt mixture based on old pavement milling material, and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] The embodiment of indoor test: the used old asphalt pavement milling material (RAP material) used in the test is the material of the same particle size specification of the same source, at first the RAP material is carried out mechanical separation in the mixing plant, and is divided into poor oil coarse components (particle size is greater than 4.75 mm) and oil-rich fine components (particle size less than 4.75mm). Then, according to the method T 0735 in the "Test Regulations for Asphalt and Asphalt Mixtures in Highway Engineering" (JTG E20-2011), the asphalt content test is carried out on the lean oil coarse component, and the oilstone of each particle size in the lean oil coarse component is measured by the test. See Table 1 for comparison. Using the method T 0726 in the "Test Regulations for Asphalt and Asphalt Mixtures in Highway Engineering" (JTG E20-2011), the oil-rich fine components were extracted. The results are shown in Table 2, and the extracted old asphal...

Embodiment 2

[0077] Indoor test embodiment, this embodiment is the same as the RAP material poor oil crude component used in the above-mentioned embodiment 1, the RAP material rich oil fine component, new aggregate and slag type, and the difference with embodiment 1 is:

[0078] The regeneration agent is ZSR-100 modified regeneration agent produced by Jiangsu Tiannuo Road Material Technology Co., Ltd., and the dynamic viscosity at 60°C is 101Pa.s.

[0079] The new asphalt adopts TNH-15 hard asphalt produced by Jiangsu Tiannuo Road Material Technology Co., Ltd., and its performance indicators are shown in Table 10.

[0080] Table 10 TNH-15 type hard asphalt technical indicators

[0081] Penetration 25°C (0.1mm)

Softening point ℃

Ductility 25℃(cm)

14

73

16

[0082] See Table 11 for the ratio of raw materials used to prepare a high modulus asphalt mixture in the laboratory test, and see Table 12 for the synthetic gradation of the high modulus asphalt mixtu...

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Abstract

The present invention discloses a high-modulus asphalt mixture based on an old pavement milling material, and a preparation method thereof, and belongs to the technical field of road engineering, wherein the high-modulus asphalt mixture comprises the following raw materials by mass: 35-75% of the lean oil coarse component (particle size of greater than 4.75 mm) in an old pavement milling material,25-65% of the rich oil fine component (particle size of less than 4.75 mm) in an old pavement milling material, 0.1-2% of a modification regeneration agent, 0-20% of new aggregate, 0-3% of ore powder, and 0-3% of new asphalt. According to the present invention, the high-modulus asphalt mixture prepared through the method has advantages of high modulus, excellent mechanical property, good anti-rutting ability, good durability and good water stability; the 100% recycling of the lean oil coarse aggregate in the old asphalt pavement milling material and the 100% resource utilization of the rich oil fine aggregate are achieved, and the potential value of the old asphalt pavement milling material is completely provided; and the super-long service life, the safe driving and the economy of the pavement are achieved.

Description

technical field [0001] The invention belongs to the technical field of road engineering and relates to a high-modulus asphalt mixture, in particular to a high-modulus asphalt mixture based on old road surface milling material and a preparation method thereof. Background technique [0002] The recycling of asphalt pavement milling material (hereinafter referred to as RAP) has become an effective way to save resources and reduce environmental pollution recognized at home and abroad. At present, the recycling of asphalt from RAP materials mainly includes hot-in-place regeneration, industrial heat regeneration, and cold-in-place regeneration. And factory cold recycling, etc. Different technologies have their own adaptability, advantages and disadvantages, but industrial thermal regeneration is a regeneration technology that can realize the performance recovery of aged asphalt in RAP materials, the classification and utilization of aggregates, and the relatively uniform performan...

Claims

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Application Information

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IPC IPC(8): C04B26/26C04B111/20C04B111/27
CPCC04B26/26C04B2111/00017C04B2111/00482C04B2111/0075C04B2111/20C04B2111/27C04B2201/50C04B18/167C04B14/28C04B20/0076C04B2103/0068
Inventor 杨刚龙彪胡亮徐萌肖护兵
Owner 江苏天诺环境工程技术开发有限公司
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