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Composition design method of recycled 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 not being able to restore and regenerate old materials, the potential value of unused old materials, etc., and achieve cost reduction , Improve the water damage resistance, the effect of simple composition design method

Active Publication Date: 2016-09-21
BEIJING UNIV OF CIVIL ENG & 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 of recycled ogfc mixture
  • Composition design method of recycled ogfc mixture
  • Composition design method of recycled 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 aggregate, high-viscosity modified asphalt is used as cementing material, lignin fiber is used as cellulose, and lime powder is used as mineral powder. The performance test results of high-viscosity modified asphalt are shown in Table 1, and the test results of lignin fiber performance 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 asphalt ratio of OGFC-13 old material are measured. The synthetic gradation is shown in Table 3, and the asphalt ratio is 4.5%.

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

[0037]

[0038]

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

[0040] index

unit

test results

skills requirement...

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 cementing material, lignin fiber and mineral fiber are used as cellulose, and lime powder and slaked lime are used as mineral powder. The properties of high-viscosity modified asphalt, lignin fiber, and mineral fiber were tested according to the industry testing standards of our country, and the test results were all in line with the corresponding regulations in the specifications of our country.

[0060] The aging degree of OGFC-13 old material is 5 years, which contains mineral materials and high-viscosity asphalt. The gradation and asphalt ratio of OGFC-13 old material are measured. The synthetic gradation is shown in Table 3, and the asphalt ratio is 4.5%.

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

[0062] Such as figur...

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 aggregate, high-viscosity modified asphalt is used as cementing material, lignin fiber is used as cellulose, and slaked lime is used as mineral powder. 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 were all in line with the corresponding regulations in our country's specifications.

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

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

[0076] Such as figure 1 Shown, a kind of composition design method of the regenerated OGFC-20 mixture based on fiber modificat...

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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, relates to a composition design method of an OGFC mixture, in particular to a composition design method of a recycled OGFC mixture based on fiber modification technology. 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, the service life of the drainage pavement is relatively short, and a large amount of OGFC milling material cannot be fully utilized....

Claims

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Application Information

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Patent Type & Authority Patents(China)
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 UNIV OF CIVIL ENG & ARCHITECTURE
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