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Open-graded lignin fiber asphalt mixture and preparation method thereof

A technology of lignin fiber and asphalt mixture, which is applied in the field of pavement paving materials, can solve the problem of the lack of promulgation of road performance requirements for open-graded fiber asphalt mixture, improve water stability and anti-rutting ability, reduce cost, performance improvement

Inactive Publication Date: 2018-12-07
泰州学院 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, two domestic performance requirements for open-graded asphalt mixtures have been issued, but there is no specification for the performance requirements of open-graded fiber asphalt mixtures.

Method used

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  • Open-graded lignin fiber asphalt mixture and preparation method thereof
  • Open-graded lignin fiber asphalt mixture and preparation method thereof
  • Open-graded lignin fiber asphalt mixture and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] In this example, the aggregates are divided into three groups according to particle size: the first group of aggregates: 10-15mm (including 10mm and 15mm); the second group of aggregates: 5-10mm (including 5mm and excluding 10mm); Three sets of aggregates: ≤3 mm;

[0027] Raw materials: 9043g of aggregates (including 4069g of the first group of aggregates, 3436g of the second group of aggregates, and 1357g of the third group of aggregates), 180.9g of mineral powder (limestone with a particle size of 0.075mm or less), 399g of SBS modified asphalt, wood Vegetable fiber 9g.

[0028] The preparation method is as follows:

[0029] 1. Put 9043g of aggregate and 180.9g of ore powder in an oven at 175°C and heat and dry them to constant weight (generally not less than 6h);

[0030] 2. Heat the SBS modified asphalt in an oven to the mixing temperature of the asphalt mixture (175~185°C), and keep the temperature for later use;

[0031] 3. Preheat the indoor small mixing pot to...

Embodiment 2

[0034] In this example, the aggregates are divided into three groups according to particle size: the first group of aggregates: 10-15mm (including 10mm and 15mm); the second group of aggregates: 5-10mm (including 5mm and excluding 10mm); Three sets of aggregates: ≤3 mm;

[0035] Raw materials: 5000g of aggregates (of which the mass of the first group of aggregates, the second group of aggregates, and the third group of aggregates are 2250g, 1900g, and 750g respectively), 100g of mineral powder (limestone with a particle size of 0.075mm or less), SBS modified 221g permanent asphalt, 5g lignin fiber.

[0036] The preparation method is as follows:

[0037] 1. Put the aggregate and mineral powder in an oven at 175°C and heat and dry them to constant weight (generally not less than 6 hours);

[0038] 2. Heat the SBS modified asphalt in an oven to the mixing temperature of the asphalt mixture, and keep the temperature for later use;

[0039] 3. Preheat the indoor small mixing pot...

Embodiment 3

[0041] Embodiment 3 fiber comparison test

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Abstract

The invention discloses an open-graded lignin fiber asphalt mixture and a preparation method thereof. The mixture comprises SBS modified asphalt, lignin fiber and mineral aggregate, wherein the mineral aggregate is composed of aggregate and mineral powder; and the aggregate is divided into three groups according to the particle sizes of 10-15mm, 5-10mm and less than or equal to 3mm. The preparation method of the mixture comprises the following steps: respectively drying the raw materials to constant weight; performing dry mixing on the lignin fiber and the coarse and fine aggregate for 30 seconds at a mixing temperature, adding the constant temperature SBS modified asphalt for performing wet mixing for 3 minutes, and adding the mineral powder for mixing for 90 seconds, thereby obtaining the product. According to the open-graded lignin fiber asphalt mixture provided by the invention, the pavement performance of the mixture can be greatly improved, the operation is simple and convenient,and the cost is saved.

Description

technical field [0001] The invention relates to a road paving material, in particular to an open-graded lignin fiber asphalt mixture and a preparation method thereof. Background technique [0002] Open-Graded Asphalt Friction Course (OGFC) is also known as drainage pavement. OGFC is an open-graded mixture with interconnected pores. The porosity generally reaches 20% to 25%. Excellent drainage, anti-skid, noise reduction and other environmental protection functions have been widely used in Europe, Japan and other countries. However, due to the large porosity, low strength and poor durability of this kind of mixture, asphalt binder with outstanding performance must be used; therefore, it is urgent to modify the asphalt and improve the road performance of open-graded asphalt mixture. Fiber modifier has attracted extensive attention of researchers because of its remarkable modification effect on asphalt. At the same time, in order to improve the asphalt content and anti-loosin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B26/26C04B38/00
CPCC04B26/26C04B2111/0075C04B14/14C04B14/28C04B18/26C04B38/0041
Inventor 吴萌萌梁吉雷才洪美胡志强韦平和
Owner 泰州学院
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