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Open-graded basalt fibre and asphalt mixture and preparation method thereof

The technology of basalt fiber and asphalt mixture is applied in the field of pavement paving materials, which can solve the problem of the lack of promulgation of road performance requirements and specifications for open-graded fiber asphalt mixture, so as to improve water stability and anti-rutting ability and reduce costs. , the effect of improving shear resistance

Active Publication Date: 2018-11-23
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 basalt fibre and asphalt mixture and preparation method thereof
  • Open-graded basalt fibre and asphalt mixture and preparation method thereof
  • Open-graded basalt fibre and asphalt mixture and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

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

[0027] Raw materials: 9043g aggregate (including 4069g of the first group of aggregates, 3436g of the second group of aggregates, 1357g of the third group of aggregates), 180.9g of mineral powder (limestone with a particle size of less than 0.075mm), SBS modified asphalt 399g, basalt Fiber 23g.

[0028] The preparation method is as follows:

[0029] 1. Put 9043g of aggregate and 180.9g of mineral powder in a 175℃ oven to heat and dry 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℃), and keep it at a constant temperature for standby;

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

Embodiment 2

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

[0035] Raw materials: 5000g aggregate (the mass of the first group of aggregates, the second group of aggregates and the third group of aggregates are 2250g, 1900g, 750g respectively), 100g of mineral powder (limestone with a particle size of less than 0.075mm), SBS modified Asphalt 221g, basalt fiber 12.5g.

[0036] The preparation method is as follows:

[0037] 1. Heat and dry the aggregate and mineral powder in a 175℃ oven to constant weight (generally not less than 6h);

[0038] 2. Put the SBS modified asphalt in an oven and heat it to the mixing temperature of the asphalt mixture, and keep it at a constant temperature for standby;

[0039] 3. Preheat the indoor small mixing pot to a mixing tempe...

Embodiment 3

[0041] Example 3 Fiber comparison test

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Abstract

The invention discloses an open-graded basalt fibre and asphalt mixture and a preparation method thereof. The mixture comprises SBS modified asphalt, basalt fibres and mineral aggregate, wherein the mineral aggregate comprises an aggregate material and mineral powder, and the aggregate material is divided into three groups according to the grain size of 10-15 mm, 5-10 mm and less than or equal to3 mm. The preparation method for the mixture comprises the steps of drying the raw materials to the constant weight separately, carrying out dry mixing on the basalt fibres and the coarse and fine aggregate material for 30 s at the mixing temperature, adding the constant-temperature SBS modified asphalt, carrying out wet mixing for 3 min, adding the mineral powder, carrying out mixing for 90 s soas to obtain the mixture. According to the open-graded basalt fibre and asphalt mixture, the pavement performance can be greatly improved, the operation is simple and convenient, and the cost is low.

Description

technical field [0001] The invention relates to pavement paving materials, in particular to an open-graded basalt fiber asphalt mixture and a preparation method thereof. Background technique [0002] Open-Graded Asphalt Friction Course (hereinafter referred to as 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 binders with outstanding performance must be used; therefore, it is imperative to modify asphalt to improve the road performance of open-graded asphalt mixtures. Fiber modifiers have attracted extensive attention of scientific researchers because of their significant modification effect on asphalt. At the same time, in order...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B26/26
CPCC04B26/26C04B2111/0075C04B14/14C04B14/28C04B14/4643
Inventor 吴萌萌梁吉雷周国海才洪美韦平和
Owner 泰州学院
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