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Composition design method for regenerated open graded friction course (OGFC) mixture

A design method and technology of mixed materials, applied in the direction of sustainable waste treatment, solid waste management, climate sustainability, etc., can solve the problems of inability to restore and regenerate old materials, the potential value of unused old materials, etc., and achieve cost reduction , Improve the performance of water damage resistance, and the effect of accurate mixing ratio

Active Publication Date: 2014-09-24
BEIJING UNIVERSITY OF CIVIL ENGINEERING AND ARCHITECTURE +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The composition of the asphalt concrete of this invention is prepared according to the traditional method, and all of them are new materials, and the potential value of the old materials is not utilized, so the effect of restoring and regenerating the old materials cannot be achieved.

Method used

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  • Composition design method for regenerated open graded friction course (OGFC) mixture
  • Composition design method for regenerated open graded friction course (OGFC) mixture
  • Composition design method for regenerated open graded friction course (OGFC) mixture

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Take the composition design method of recycled OGFC-13 mixture as an example.

[0033] 1. Performance test of raw materials

[0034] Basalt and machine-made sand are used as aggregates, high-viscosity modified asphalt is used as cementing material, lignin fiber is used for cellulose, and lime powder is used for mineral powder. The performance test results of high viscosity modified asphalt are shown in Table 1, and the performance test results of lignin fibers are shown in Table 2.

[0035] The aging degree of OGFC-13 old material is 5 years, which contains mineral material and high-viscosity asphalt. The gradation and oil stone ratio of OGFC-13 old material are determined.

[0036] Table 1: Performance test results of high viscosity modified asphalt

[0037]

[0038]

[0039] Table 2: Test results of lignin fiber properties

[0040] Indicator

unit

test results

skills requirement

Ash content

％

20.1

18±5, no volatiles

...

Embodiment 2

[0057] Take the composition design method of recycled OGFC-13 mixture as an example.

[0058] 1. Performance test of raw materials

[0059] Andesite and machine-made sand are used as aggregates, high-viscosity modified asphalt is used as binder, cellulose is selected from lignin fiber and mineral fiber, and mineral powder is selected from lime powder and slaked lime. The properties of high-viscosity modified asphalt, lignin fiber, and mineral fiber were tested according to my country's industry test standards, and the test results were in line with the corresponding provisions in my country's standards.

[0060] The aging degree of OGFC-13 old material is 5 years, which contains mineral material and high-viscosity asphalt. The gradation and oil stone ratio of OGFC-13 old material are determined.

[0061] 2. Composition design of recycled OGFC-13 mixture

[0062] like figure 1 As shown, a composition design method of recycled OGFC-13 mixture based on fiber modification techn...

Embodiment 3

[0071] Take the composition design method of recycled OGFC-20 mixture as an example.

[0072] 1. Performance test of raw materials

[0073] Basalt and machine-made sand are used as aggregates, high-viscosity modified asphalt is used as cementing material, lignin fiber is used for cellulose, and slaked lime is used for mineral powder. The properties of high-viscosity modified asphalt and lignin fibers were tested according to the industry test standards in my country, and the test results were in line with the corresponding provisions in the Chinese standards.

[0074] The aging degree of OGFC-20 old material is 7 years, which contains mineral material and high-viscosity asphalt. The gradation and oil stone ratio of OGFC-20 old material are determined, and the oil stone ratio is 4.0%.

[0075] 2. Composition design of recycled OGFC-20 mixture

[0076] like figure 1 As shown, a composition design method of recycled OGFC-20 mixture based on fiber modification technology, which...

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Abstract

The invention provides a composition design method for a regenerated open graded friction course (OGFC) mixture. According to the method, a freeze-thaw splitting strength ratio after a performance improvement test is taken as a performance control index of the regenerated OGFC mixture, if the index does not meet the requirement, cellulose of which the mass is 0.1-0.3 percent of that of the regenerated OGFC mixture is added, the problem that the largest oilstone ratio of the regenerated OGFC mixture is small is solved, and the water damage resistance of the regenerated OGFC mixture is further improved, so that the composition design of the regenerated OGFC mixture is realized. The design method is simple and accurate in proportioning, the potential value of OGFC old materials is fully utilized, the OGFC old materials are reduced into the regenerated OGFC mixture, and the construction cost of the OGFC is further reduced. By adoption of the design method, the water damage resistance of the regenerated OGFC mixture can be well improved, so that the composition design of the regenerated OGFC mixture is realized.

Description

technical field [0001] The invention belongs to the technical field of road material preparation, and relates to a composition design method of OGFC mixture, in particular to a composition design method of regenerated OGFC mixture based on fiber modification technology. Background technique [0002] Open Graded Friction Course (OGFC) refers to the paving of asphalt mixture with large porosity, which can quickly drain surface rainwater from its interior, and has the advantages of anti-slip, noise reduction, anti-glare, The road pavement material that integrates water seepage is generally used as the upper layer or the upper layer and the middle surface of the drainage pavement. With the application and promotion of drainage pavement, the use of OGFC, the most important surface material for drainage pavement, has increased dramatically. [0003] However, the service life of the drainage pavement is relatively short, and a large amount of OGFC milling material cannot be fully ...

Claims

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Application Information

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IPC IPC(8): C04B26/26C04B18/16C04B24/38
CPCY02W30/91
Inventor 徐世法许鹰王晓晓金珊珊李振
Owner BEIJING UNIVERSITY OF CIVIL ENGINEERING AND ARCHITECTURE
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