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Regenerated OGFC (Open-graded Friction Courses) mixed material and preparation method thereof

A technology of mixed material and mineral material, which is applied in the field of recycled OGFC mixed material and its preparation, can solve the problems of not using old material to restore, failing to achieve the regeneration of old material resources, etc., and achieve the effect of accurate results, low cost and reduced cost

Active Publication Date: 2014-09-10
BEIJING UNIV OF CIVIL ENG & ARCHITECTURE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the invention patent improves the service life of the pavement, it does not use old materials to restore OGFC, which fails to achieve the purpose of recycling old materials resources

Method used

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  • Regenerated OGFC (Open-graded Friction Courses) mixed material and preparation method thereof
  • Regenerated OGFC (Open-graded Friction Courses) mixed material and preparation method thereof
  • Regenerated OGFC (Open-graded Friction Courses) mixed material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Take the recycled OGFC-13 mixture and its preparation method as an example.

[0043] 1. Performance test of raw materials

[0044] The amount of old materials in the recycled OGFC-13 mixture is 20%, and the old materials contain mineral materials and high-viscosity asphalt; the cellulose is lignin fiber, and the amount is 0.3%; the mineral powder is lime powder, and the amount 6%; the dosage of high-viscosity modified asphalt is 6%; the new mineral materials are basalt and machine-made sand; the initial asphalt ratio is 6.5%.

[0045] The performance test results of high-viscosity modified asphalt are shown in Table 1, the test results of lignin fiber properties are shown in Table 2, and the synthesis gradation of recycled OGFC-13 is shown in Table 3.

[0046] Table 1: Performance test results of high viscosity modified asphalt

[0047]

[0048] Table 2: Test results of lignin fiber properties

[0049] indicators

unit

test results

skills requ...

Embodiment 2

[0065] Take the recycled OGFC-20 mixture and its preparation method as an example.

[0066] 1. Performance test of raw materials

[0067] The amount of old materials in the recycled OGFC-20 mixture is 15%, and the old materials contain mineral materials and high-viscosity asphalt; the cellulose is selected from lignin fiber, and the amount is 0.1%; 2%; the dosage of high-viscosity modified asphalt is 4%; andesite and machine-made sand are selected as new mineral materials; the initial asphalt ratio is 5.5%.

[0068] The performance test results of high-viscosity modified asphalt are shown in Table 1, the performance test results of lignin fiber are shown in Table 2, and the synthesis gradation of recycled OGFC-20 is shown in Table 5.

[0069] Table 5: Synthesis gradation of regenerated OGFC-20

[0070]

[0071] The properties of high-viscosity modified asphalt and lignin fiber were tested according to the industry testing standards of our country, and the test results wer...

Embodiment 3

[0089] Take the recycled OGFC-20 mixture and its preparation method as an example.

[0090] The amount of old materials in the recycled OGFC-20 mixture is 15%, and the old materials contain mineral materials and high-viscosity asphalt; the cellulose is selected from lignin fiber, and the amount is 0.1%; 2%; the dosage of high-viscosity modified asphalt is 4%; andesite and machine-made sand are selected as new mineral materials; the initial asphalt ratio is 5.5%. The performance test results of raw materials are in line with the corresponding regulations in our country's specifications.

[0091] The preparation method of the regenerated OGFC-20 mixture, the heating temperature and time, the mixing time, the leakage loss results, the performance test results of the regenerated OGFC-20 mixture and other parameters are the same as those in Example 2. Among them, the freeze-thaw splitting strength ratio is 75.2%, which does not meet the requirement of 80% or more in the performanc...

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Abstract

The invention discloses a regenerated OGFC (Open-graded Friction Courses) mixed material and a preparation method thereof. The mixed material comprises cellulose, hyperviscosity modified asphalt, new mineral aggregate, mineral powder and an OGFC old material. The preparation method comprises the following steps: respectively heating the OGFC old material, new mineral aggregate and hyperviscosity modified asphalt; then, mixing the heated OGFC old material and the new mineral aggregate with cellulose; then, adding the heated hyperviscosity modified asphalt into the mixture and mixing; then, adding the mineral powder, continuously mixing to form a regenerated OGFC mixed material; and finally, carrying out a Xielunbao asphalt leakage loss experiment and performance index test on the regenerated OGFC mixed material. The preparation method of the regenerated OGFC mixed material provided by the invention is simple to operate and accurate in result, and the potential value of the OGFC old material is fully utilized and the OGFC old material is reduced to the regenerated OGFC mixed material, so that the cost of OGFC is lowered.

Description

technical field [0001] The invention belongs to the technical field of road material preparation, and relates to a preparation method of an OGFC mixture, in particular to a regenerated OGFC mixture and a preparation method thereof. Background technique [0002] Open Graded Friction Course (OGFC for short) refers to paving with asphalt mixture with large void ratio, which can quickly drain rainwater from the inside of the road surface, and has anti-skid, noise reduction, anti-glare, The road paving material that seeps into one body is generally used as the upper layer or the upper layer and the middle layer of the drainage pavement. With the application and popularization of drainage pavement, the use of OGFC as the most important surface material of drainage pavement has increased sharply. [0003] However, during the use of the drainage pavement, the gaps in the OGFC will be blocked by solid particles such as accumulated dust and tire rubber particles. After long-term use...

Claims

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Application Information

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IPC IPC(8): C04B26/26
CPCY02A30/30
Inventor 索智徐世法金珊珊王晓晓薛晓飞
Owner BEIJING UNIV OF CIVIL ENG & ARCHITECTURE
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