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SMA modified asphalt concrete bridge deck pavement based on improved coarse aggregate pebble interface

A technology of modified asphalt and bridge deck pavement, which is applied in the direction of surface layering devices, bridges, bridge parts, etc., and can solve problems such as poor adhesion

Pending Publication Date: 2020-03-27
江苏交通工程咨询监理有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] Purpose of the invention: To solve the problem of poor cohesion between acidic granite coarse aggregate stones and acidic asphalt, the coarse aggregate stones are coated with a thin layer of microfiber polymer mortar, which can improve the interface affinity between coarse aggregate stones and asphalt, and improve the Water damage resistance of SMA asphalt concrete; polymer modifier, graphene sponge and carbon fiber filaments are added to traditional SBS asphalt mastic to form a spatial network structure and improve the working performance of SMA modified asphalt concrete pavement

Method used

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  • SMA modified asphalt concrete bridge deck pavement based on improved coarse aggregate pebble interface
  • SMA modified asphalt concrete bridge deck pavement based on improved coarse aggregate pebble interface
  • SMA modified asphalt concrete bridge deck pavement based on improved coarse aggregate pebble interface

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Effect test

Embodiment 1

[0071] A kind of SMA modified asphalt concrete bridge deck pavement based on improved coarse aggregate stone interface of the present invention, comprises improved coarse aggregate stone 1 and modified asphalt mastic 2, and described improved coarse aggregate stone 1 is made of Coarse aggregate stone inner core 11, polymer cement mortar outer coating layer 12 and adhesive microfiber wool layer 13, polymer cement mortar outer coating layer 12 wraps coarse aggregate stone inner core 11, adhesive microfiber wool layer 13 is glued Anchored on the polymer cement mortar outer coating layer 12, an improved coarse aggregate stone 1 is formed; the modified asphalt mastic 2 is mixed with SBS modified asphalt, a small amount of fine aggregate, mineral powder, fiber stabilizer, On the basis of the mixture composed of antioxidant and anti-stripping agent, graphene sponge, carbon fiber filament, polymer modifier and rubber modifier are added to form modified asphalt mastic 2, and heating mod...

Embodiment 2

[0073] A preparation method of the improved coarse aggregate stone 1 based on the SMA modified asphalt concrete bridge deck pavement of the improved coarse aggregate stone interface comprises the following steps:

[0074] The first step: wash and dry the coarse aggregate stone inner core 11, and use the method of spraying and immersing the polymer emulsion to form a thin layer of polymer emulsion coating on the surface of the coarse aggregate stone inner core 11;

[0075] Step 2: The polymer cement mortar coating layer 12 is mainly composed of water-based polymer latex, ordinary Portland cement, quartz sand and silica fume, and is prepared by adding various modification additives. Mixing mortar, its weight ratio is: cement 15-25%, polymer emulsion 8-12%, quartz sand 40-60%, silicon powder 5-10%, carbon nanotube airgel particles 0.5-1%, graphite 0.05-0.1% olefin, 0.5-1% polycarboxylate high-efficiency water reducer, 0.03-0.12% coagulant, etc. Stir evenly, then put 10kg of pre-m...

Embodiment 3

[0079] A preparation method for SMA-modified asphalt concrete bridge deck pavement based on the improved phase aggregate stone interface comprises the following steps:

[0080] The first step: deploy modified asphalt, according to the weight ratio: 100 parts of base asphalt; 6-8 parts of SBS modifier; 4-6 parts of styrene-butadiene rubber powder, 3-5 parts of EVA polymer modifier; carbon fiber 4-6 parts of silk; 1-2 parts of graphene sponge particles;

[0081] The second step: deploy modified asphalt mastic 2, according to the weight ratio: 100 parts of modified asphalt; 110-160 parts of mineral powder; 5-10 parts of fiber stabilizer; 2-4 parts of anti-stripping agent; 1-2 parts of oxygen agent; castor oil: 1-2 parts;

[0082] The third step: Prepare SMA asphalt concrete, according to the weight ratio: the amount of modified coarse aggregate stone 1 is 70-80%; the amount of modified asphalt mastic 2 is 20-30%;

[0083] Step 4: After heating the modified asphalt mastic 2, fee...

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Abstract

The invention provides SMA modified asphalt concrete bridge deck pavement based on an improved coarse aggregate pebble interface. In reference of chestnut shapes, to solve the problem of poor bondingbetween acid granite stones and acid asphalt, a method of wrapping polymer mortar and spraying microfibers on the surface is adopted, acid granite stones are improved into an alkaline interface, coarse aggregate stones wrapped with slurry and having long hairs are formed, and the adhesion between the improved coarse aggregate stones and asphalt mastic is greatly improved; graphene sponge, carbon fibers and a polymer modifier are doped into asphalt mastic to form a spatial network structure, the graphene sponge is equivalent to a skeleton, the carbon fibers are equivalent to muscle fibers, andthe polymer modifier is equivalent to connective tissue. According to the SMA asphalt concrete steel bridge deck pavement adopting the slurry-coated long-hair modified coarse aggregate stone and graphene carbon fiber modified asphalt mastic mixture, the strength, the high-temperature stability, the low-temperature crack resistance, the water stability, the skid resistance, the rutting resistance and the like of the steel bridge deck SMA pavement are greatly improved.

Description

technical field [0001] The invention relates to the field of road surface engineering, relates to an asphalt concrete pavement, in particular to an SMA modified asphalt concrete bridge deck pavement based on an improved coarse aggregate stone interface. Background technique [0002] The asphalt concrete pavement of the steel bridge deck has always been a difficult problem in the industry. The steel box girder is a large thin-walled space structure. It has the ability to deform synergistically with the steel box girder; on the other hand, the bridge deck pavement is directly subjected to the rolling of the wheel load, so it needs to resist the local deformation caused by the wheel load and maintain a smooth appearance for driving. This conflicting demand determines the complexity of steel bridge deck pavement engineering technology. [0003] The asphalt concrete pavement design of the steel bridge deck should meet the following requirements: sufficient strength and rigidity ...

Claims

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Application Information

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IPC IPC(8): E01D19/12B28B19/00
CPCB28B19/00E01D19/12E01D19/125
Inventor 徐金法
Owner 江苏交通工程咨询监理有限公司
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