Modified fiber for bitumen road surface, preparation method thereof and bitumen road surface mixture containing the modified fiber

A technology of modified fiber and asphalt pavement, which is applied in the field of asphalt pavement mixture, can solve the problems affecting the cost of asphalt pavement, increase the raw material cost of anti-stripping agent, etc., and achieve the effect of reducing costs

Inactive Publication Date: 2010-01-06
上海挪亚环境资源开发有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] SMA asphalt mixture must be mixed with fibers, and in order to improve the anti-skid performance of asphalt pavement, limestone should not be used as coarse aggregate, and acidic stone with a polishing value that meets the specified requirements should be used, which requires 0.4% anti-skid in asphalt. Stripping agent to enhance the adhesion of asphalt and acid stone, which also increases the cost of raw materials for anti-stripping agent
[0006] Fibers currently on the market are more expensive, and the use of fibers in the mixture directly affects the cost of asphalt pavement

Method used

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  • Modified fiber for bitumen road surface, preparation method thereof and bitumen road surface mixture containing the modified fiber
  • Modified fiber for bitumen road surface, preparation method thereof and bitumen road surface mixture containing the modified fiber
  • Modified fiber for bitumen road surface, preparation method thereof and bitumen road surface mixture containing the modified fiber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Quicklime is crushed to a particle size of less than or equal to 3mm, and 350 kilograms of quicklime particles are added to 1000 kilograms of wet papermaking sludge (water content is 65% (weight)), and stirred evenly at 1200 rpm; placed for 7 days to mature; Drying in a type dryer, the inlet temperature of the dryer is 650-750°C, and the outlet temperature is 115-125°C; crushed to a particle size of less than or equal to 40 mesh, 873 kg of modified fibers are obtained, and the moisture content is 5.6% ( weight), Ca(OH) 2 54% (by weight), for packaging.

Embodiment 2

[0034] Prepare modified fibers for asphalt in the same manner as in Example 1, except that 400 kg of quicklime is added to 1000 kg of papermaking sludge (water content is 55% (weight)) to obtain a water content of 5% (weight). ), Ca(OH) 2 1044 kg of modified fiber at 52% by weight.

Embodiment 3

[0036] Prepare modified fibers for asphalt in the same manner as in Example 1, except that 200 kg of quicklime is added to 1000 kg of papermaking sludge to obtain a water content of 4.2% (by weight), Ca(OH) 2 648 kg of modified fibers of 41% by weight.

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Abstract

A modifying fibre prepared from paper-making sludge and used for asphalt pavement of road is prepared from paper-making sludge (32-55 wt.%), Ca(OH)2 (40-60 wt.%) and water (4-8 wt.%) through breaking Ca(OH)2 to become 3-mm particles, proportionally mixing with others, stirring, stacking for at least 7 days for ageing and dewatering, baking, pulverizing and sieving by 40 meshes.

Description

technical field [0001] The present invention relates to a modified fiber for asphalt pavement prepared from papermaking sludge, a method for producing the same, and an asphalt pavement mixture using the modified fiber. technical background [0002] Many developed countries attach great importance to adding a small amount of fiber into the asphalt mixture to improve the durability of the asphalt pavement, making the asphalt pavement durable and smooth. This is because the fiber has the functions of reinforcing, dispersing, absorbing asphalt and stabilizing, which can prevent asphalt from being discharged from the asphalt mixture and prevent cracks and loosening of the asphalt pavement. [0003] With the in-depth development of reform and opening up, the requirements for asphalt pavement are getting higher and higher, the load capacity increases, the speed of the vehicle increases, and the traffic volume also increases significantly. The road surface on which the vehicle is dr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08K7/02C08L95/00E01C7/26C04B18/24
CPCC04B18/243Y02W30/91C04B20/023
Inventor 朱三棣严军韩晓伟邵拱信
Owner 上海挪亚环境资源开发有限公司
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