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A high-strength composite structural layer for anti-rutting and its preparation method

A composite structure, anti-rutting technology, applied in the direction of on-site coagulation pavement, roads, buildings, etc., can solve the problems affecting the quality and service life of asphalt pavement structure, the improvement effect of anti-rutting deformation ability is limited, and the optimization effect is not effective. Significant problems such as high resistance to permanent deformation and waterproofing, good water seepage coefficient, and improved paving quality

Active Publication Date: 2021-09-28
SOUTHEAST UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, research on asphalt pavement rutting mainly focuses on unstable rutting, usually using three methods: optimizing the performance of modified asphalt, adjusting the gradation of asphalt mixture, and adding anti-rutting agents. Relatively speaking, due to the optimization of modified asphalt Usually, polymer modified or hard asphalt is used. Compared with ordinary modified asphalt, the optimization effect is not significant and the cost is high. At the same time, adjusting the grading of asphalt mixture has a limited effect on improving the anti-rutting deformation ability of the mixture. There are relatively many applications of adding anti-rutting agents to the mixture
However, in China, due to the large number of heavy-duty vehicles, the hot service environment, and the lack of theoretical calculation methods for anti-rutting requirements for the design and evaluation of asphalt pavement structural layers, simply using one or more of the above three methods is often too complex. It cannot meet the use requirements of anti-rutting disease, which seriously affects the quality and service life of the asphalt pavement structure

Method used

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  • A high-strength composite structural layer for anti-rutting and its preparation method
  • A high-strength composite structural layer for anti-rutting and its preparation method
  • A high-strength composite structural layer for anti-rutting and its preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0043] Such as figure 1 As shown, a high-strength composite structural layer for anti-rutting in this embodiment includes a lower high-ductility MMA resin exposed rock layer, a lower reinforced structural layer 4, and a middle layer with high strength Type MMA resin graded crushed stone layer, middle reinforced reinforced structure layer 9, upper high strength MMA resin graded crushed stone layer, upper wearing layer 14; the lower high ductility MMA resin dew stone layer includes lower high ductility MMA resin bonded The knot layer 3 and exposed rock layer 2, the lower high-ductility MMA resin bonding layer 3 is laid on the exposed rock layer 2, the exposed rock layer 2 is embedded in the lower high-ductility MMA resin bonding layer 3, and contacts the lower reinforced structural layer 4; the middle-level high-strength MMA resin graded crushed stone layer includes a middle-level high-strength MMA resin bonding layer 7 and a middle-level graded crushed stone layer 8, and the mi...

Embodiment 2

[0091] The high-strength composite structure for anti-rutting used in Example 2, except that the amount of MMA resin binder and the amount of graded crushed stone in the interlayer bonding system is different from that of Example 1, the preparation and paving methods of the rest of the materials are the same as those of Example 1. Same.

[0092] The high-ductility MMA resin bonding material adopted in the lower high-ductility type MMA resin bonding layer 3 has a sprinkling amount of 0.8kg / m 2 The high-strength MMA resin bonding material adopted by the middle layer high-strength MMA resin bonding layer 7 and the upper layer high-strength MMA resin bonding layer 12, the spreading amount is respectively 0.5kg / m 2 , the spreading amount of the upper high-strength MMA resin bonding layer 12 is 0.7kg / m 2 .

[0093] Both the middle graded crushed stone and the upper graded crushed stone are made of limestone, the shape of the limestone is similar to a cube, and it has high compress...

Embodiment 3

[0095] In the high-strength composite structure for anti-rutting used in Example 3, except that the structure thickness of the lower reinforced structural layer 4 and the middle reinforced structural layer 9, and the layout density of the high-strength and high-modulus fiber reinforced mesh are different from those in Example 1, the rest of the materials are The preparation and paving method are all the same as example 1.

[0096] The structural thicknesses of the lower reinforced structural layer 4 and the middle reinforced structural layer 9 are 50mm and 30mm respectively; A group of 8 high-modulus fiber bundles, the distance within a group is 40mm, the distance between groups is 100mm, and the lap length is 320mm; along the driving direction, a group of 10 high-strength and high-modulus fiber bundles, the distance between high-strength and high-modulus fiber bundles within a group is 50mm , the spacing between groups is 100mm, the lap length is 500mm, and the fibers of the ...

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Abstract

The invention discloses a high-strength composite structural layer for anti-rutting and a preparation method thereof. The composite structural layer is, from bottom to top, an exposed stone layer arranged on a cement stabilized crushed stone base, a lower layer of high-ductility MMA resin bonding layer, and a lower layer of reinforcement Reinforced structural layer, middle high-strength MMA resin bonding layer, middle graded gravel, middle reinforced structural layer, upper high-strength MMA resin bonding layer, upper graded crushed stone, upper wear layer. The pavement structure designed by the present invention is composed of a stable interlocking system between layers, a high-strength structural layer and an easy-to-maintain wear layer. The overall thickness of the composite structure is thin, light in weight, and excellent in coordination. The high-strength structural layer has excellent High-temperature deformation resistance, can effectively inhibit vertical and lateral shear deformation, and has good low-temperature cracking resistance, fatigue resistance and water stability. At the same time, the preparation method of the composite structure layer is highly mechanized, and the construction temperature requirements are relaxed. Strong feasibility, simple operation, easy maintenance and easy promotion.

Description

technical field [0001] The invention belongs to the field of road engineering, and relates to an asphalt pavement composite structural layer and a preparation method thereof, in particular to a high-strength composite structural layer with outstanding anti-rutting performance, taking into account low-temperature cracking resistance, fatigue resistance, skid resistance and water stability, and its Preparation. Background technique [0002] Asphalt pavement is the main structural form of high-grade road pavement in my country, accounting for more than 85% of the total number of pavements that have been built. According to the "2016 China Highway Maintenance Market Survey Report" issued by the National Bureau of Statistics, in the early stages of use, asphalt pavement in my country is prone to rutting, which rapidly reduces the level of road service. Because traditional asphalt pavement materials and structures are difficult to resist high temperature and heavy loads, the posi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E01C7/32C08L33/12C08L55/02C08K5/18
CPCC08K5/18C08L33/12C08L55/02E01C7/32E01C7/325
Inventor 罗桑舒永鸣胡靖
Owner SOUTHEAST UNIV
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