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Method for enhancing bituminous mixture by adopting chopped basalt fibers

A technology of basalt fiber and asphalt mixture, which is used in building thermal insulation materials, building components, buildings, etc., can solve the problem of reducing permanent deformation of the road surface, unable to withstand high temperature mixing of asphalt mixture, and the limitation of vehicle axle load cannot be effectively controlled. and other problems to achieve the effect of enhancing high temperature stability and solving rutting

Inactive Publication Date: 2010-05-26
ZHEJIANG GBF BASALT FIBER +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the Ministry of Communications promulgated the axle load restriction method in 2000, the automobile axle load limit has not been able to achieve effective control, and there are still many difficulties in the implementation process. Undoubtedly, starting from the design of asphalt concrete pavement, using new fiber reinforced It is particularly important to improve the high-temperature deformation resistance of the road surface under heavy-duty traffic conditions and reduce the permanent deformation of the road surface
Scholars from various countries worry whether this type of polymer fiber can withstand the high-temperature mixing of asphalt mixture, because it is found that the polymer fiber in the asphalt mixture will melt and curl when it is mixed at high temperature, and it is even difficult to see the fiber with the naked eye.

Method used

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  • Method for enhancing bituminous mixture by adopting chopped basalt fibers
  • Method for enhancing bituminous mixture by adopting chopped basalt fibers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0033] Embodiment: the chopped basalt fiber is evenly added to the asphalt mixture designed in the original gradation, in order to achieve the purpose of the present invention. The feature of the present invention is that chopped basalt fibers are mixed into heated mineral materials (crushed stone, stone chips, sand, ore powder) and mixed evenly, and then asphalt is added into the asphalt mixture, which is used for new construction or renovation. Asphalt mixture pavement for road expansion and overlay maintenance. In addition, the feature of the present invention is that the hot-mix asphalt mixture can basically be designed according to the original gradation requirements. After adding chopped basalt fibers, the amount of asphalt should be increased appropriately, and the amount of asphalt used in the original gradation design should be increased by 0.1% to 0.2%. ; The amount of chopped basalt fiber can be designed according to the traffic volume of the road and the anti-rutti...

Embodiment

[0034] Embodiment: Carry out milling to the AC-13C modified asphalt concrete pavement with severe rutting, the milling thickness is 4.5cm, and then use SBS modified asphalt AC-13C mixture mixed with basalt fiber with a weight ratio of 0.25% for overlay , to enhance the high-temperature stability of the mixture, and effectively solve the rutting problem of the highway asphalt pavement.

[0035] Design of mix ratio: The chopped basalt fiber used is expanded, the length is 6mm, the diameter of single filament is 15μm, and the dosage is 0.25% of the weight of the asphalt mixture. The design grading result is: 10mm~15mm crushed stone: 5mm~10mm crushed stone: 0mm~5mm stone chips: mineral powder=25:33:40:2, and the blending results are shown in the following table.

[0036] Blending Results Statistical Table

[0037]

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Abstract

The invention relates to a method for enhancing bituminous mixtures by adopting chopped basalt fibers, belonging to the technical field of novel compound materials. According to the invention, continuous basalt protofilaments or twistless rovings the surfaces of which are expanded into fibers in certain length, and then the fibers are used for enhancing the bituminous mixtures in a certain doping proportion and can be respectively used for maintaining the bituminous mixtures used for new construction and reconstruction and extension of highways and SMA and OGFC bituminous mixtures as well as fiber seals. In addition, the fibers can also be used for the enhancement of high-speed railway packing layer CA mortar and relevant hydraulic architectures. The chopped basalt fiber plays roles of enhancing, toughening and elasticizing the cracking prevention, crack resistance and reinforcement and 'bridging' in the enhanced bituminous mixtures, can obviously increase the anti-rutting ability of highways of the enhanced bituminous mixtures and reduces the whole life costs of the enhanced bituminous mixtures; if the fibers are used for high-speed railway plate-type ballastless tracks and CA mortar, the bending strength and the deformation resistance can be increased, i.e. the fibers play a role of crack prevention and crack resistance; in addition, the fibers have better anti-water leakage action if being used for Hydraulic and Hydro-Power Engineering.

Description

technical field [0001] The invention relates to a method for reinforcing asphalt mixture with chopped basalt fibers, and belongs to the technical field of new composite materials. Background technique [0002] With the rapid development of my country's transportation infrastructure, asphalt mixture (including CA mortar) is used more and more in the field of expressways and high-speed railways, especially the gradual increase of long-span bridges, traffic volume and axle load. , Traffic channelization and other issues have put forward higher requirements for high-grade asphalt bridge decks and road surfaces. In order to better improve the use quality of asphalt pavement, prolong the service life of the pavement, and improve the investment efficiency, it is an important issue for our road workers. [0003] In addition, under the joint action of high temperature and heavy load, rutting has become one of the typical diseases of expressways in our country. Asphalt mixture is a t...

Claims

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Application Information

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IPC IPC(8): C08L95/00C08K7/04C04B26/26C04B14/46C04B28/00
CPCC04B2111/503C04B2111/27C04B26/26C04B2111/72C04B2111/2038C04B2111/343
Inventor 侯利国胡显奇陆耀忠钱立高马建青李飞泉陆惠良卢照辉丁优松凌晨宗晟陈兴芬
Owner ZHEJIANG GBF BASALT FIBER
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