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Ecological high-durability OGFC-5 mixture

A technology of OGFC-5 and mixed materials, which is applied in the field of road engineering and can solve the problems of insufficient functionality, durability and applicability

Active Publication Date: 2019-12-31
SHANGHAI MUNICIPAL ENG DESIGN INST GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

To solve the lack of functionality, durability and applicability of OGFC mixtures, it can effectively improve the quality of ecological road traffic

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Put 800g of Sinopec base asphalt in a shearing machine with a temperature control device, add 24g of light vegetable oil when heated to 170°C, and shear at a speed of 1500r / min; add 64g of LG-501SBS when the heating temperature reaches 180°C, Cut at a speed of 2500r / min; add 2.4g of anti-stripping agent at a heating temperature of 220°C, and cut at a speed of 4500r / min for 6 hours; observe with a fluorescence microscope, SBS is evenly distributed in the asphalt phase, and a high-performance modified asphalt is obtained .

[0026] After the prepared high-performance modified asphalt was left at room temperature for 24 hours, it was placed in an oven at 175°C and heated to a molten state, and kept warm for later use. Put 11,460g of basalt aggregate and 230g of limestone powder into an oven at 185°C and heat for 6 hours, heat the mixing pot to a stirring temperature of 170°C, first add the preheated aggregates into the mixing pot and mix for 90 seconds, then add 551g to ke...

Embodiment 2

[0028] Put 1000g of Sinopec base asphalt in a shearing machine with a temperature control device, add 30g of light vegetable oil when heated to 170°C, and shear at a speed of 1500r / min; add 80g of LG-501SBS when the heating temperature reaches 180°C, Cut at 2500r / min; add 3g of anti-stripping agent at a heating temperature of 220°C, and cut at 4500r / min for 6 hours; observe with a fluorescence microscope, SBS is evenly distributed in the asphalt phase, and high-performance modified asphalt is obtained.

[0029] After the prepared high-performance modified asphalt was left at room temperature for 24 hours, it was placed in an oven at 185°C and heated to a molten state, and kept warm for later use. Put 12,000g of basalt aggregate and 240g of limestone powder into an oven at 195°C and heat for 6 hours, heat the mixing pot to a stirring temperature of 180°C, first add the preheated aggregates into the mixing pot and mix for 90 seconds, then add 577g to keep warm The standby high-p...

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Abstract

The invention discloses an ecological high-durability OGFC-5 mixture. The mixture includes the following components in percentages by mass: 4.5-4.9% of high-performance modified asphalt, and 95.5-95.1% of mineral aggregate, wherein the high-performance modified asphalt includes the following components: 2.69-2.7% of light vegetable oil, 7.185-7.193% of SBS, 0.269-0.27% of an anti-stripping agent,and the balance of 70# petroleum asphalt; and the nominal maximum particle size of the mineral aggregate is 4.75 mm, and the gradation range is as follows: the mass percentage of mineral aggregate passing through a 4.75 mm sieve pore is 90-100%, the mass percentage of mineral aggregate passing through a 2.36 mm sieve pore is 10-20%, and the mass percentage of mineral aggregate passing through a 0.075 mm sieve pore is 3-7%. The high-durability OGFC-5 asphalt mixture provided by the invention has the characteristics of high strength, good durability, and significant noise-reducing and water-discharging effects, and can be used for paving of road drainage pavements; and in addition, the high-durability OGFC-5 asphalt mixture can eliminate the phenomenon of aggregate scattering caused by combined action of shearing and torsion at intersections and a small turning radius area.

Description

technical field [0001] The invention relates to the technical field of road engineering, and discloses an ecological high-durability OGFC-5 mixture. Background technique [0002] The functions of open-graded asphalt mixture with large pores (OGFC) are drainage, noise reduction and anti-skid, and its porosity ranges from 18 to 23%. According to existing research, for OGFC mixtures, the larger the void ratio, the more obvious the drainage effect, and the smaller the maximum nominal particle size, the more obvious the noise reduction effect. However, the increase in the void ratio of the mixture and the decrease in the maximum nominal particle size make The performance of OGFC is reduced. In order to ensure the durability of the OGFC pavement, the currently commonly used OGFC in China has a void ratio of 20%, and the maximum nominal particle size of the mineral material is not less than 9.5mm. Its drainage and noise reduction effects cannot meet people's needs for an ecologica...

Claims

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Application Information

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IPC IPC(8): C04B26/26C04B24/26
CPCC04B40/0046C04B26/26C04B24/2676C04B24/08C04B2103/0068C04B14/14C04B14/28Y02W30/91
Inventor 祁文洋赵建新
Owner SHANGHAI MUNICIPAL ENG DESIGN INST GRP
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