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Ultra-thin asphalt pavement for high-grade highway

An asphalt pavement, high-grade technology, applied in the field of ultra-thin asphalt pavement of high-grade highways, can solve the problems of bending and tensile fatigue failure of the asphalt surface layer, the bonding layer of high-grade highways cannot play a role in advancing, and the cost is high, so as to save The effect of road construction funds, elimination of early damage, and reduction of rutting diseases

Pending Publication Date: 2022-01-21
张靖
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The thick asphalt pavement of existing high-grade highways is prone to rutting, which is often seen when driving on high-grade highways; The bonding layer of the road cannot play its due role and is neglected, which makes the asphalt pavement an independent flexural structural layer, so the asphalt pavement often suffers from bending and tensile fatigue damage; and because the asphalt pavement is too thick As a result, the asphalt pavement loses its proper flow-limiting effect, which in turn leads to temperature gradient cracks in the asphalt pavement; especially rutting disease is a major technical problem that has not been solved on high-grade highways. In order to reduce ruts, a large amount of money must be invested to add Asphalt modifiers, which in turn lead to high maintenance costs

Method used

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  • Ultra-thin asphalt pavement for high-grade highway
  • Ultra-thin asphalt pavement for high-grade highway
  • Ultra-thin asphalt pavement for high-grade highway

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment 1

[0089]Xinglin Expressway K11+000—K14+000 uplink road section experimental construction, the thickness of the asphalt surface layer is 90mm; at the same time, the bonding layer is used; at the same time, the anti-brittle and anti-shrinkage semi-rigid base layer uses anti-brittle and anti-shrinkage cement to stabilize the crushed stone; At the same time, the anti-brittle and anti-shrinkage cement-stabilized crushed stone has a compacted thickness greater than or equal to 300mm; at the same time, the amount of cement is 3.0-4.0% (accounting for the total mass proportion), and the 7-day unconfined compressive strength is 2.5MPa-4.0MPa; at the same time Roll forming at a temperature of 20°C-30°C, preferably at 25°C; at the same time, the thickness of the base layer is >360mm; the mineral material gradation adopts the gradation in Table 1.

specific Embodiment 2

[0091] Experimental construction of the K11+000-k14+000 downlink section of Xinglin Expressway. The thickness of the asphalt surface layer is 90mm; at the same time, the bonding layer is used; at the same time, the anti-brittle and anti-shrinkage semi-rigid base uses the anti-brittle and anti-shrinkage basalt fiber cement to stabilize the gravel; The compacted thickness of the layer is greater than or equal to 280mm; at the same time, the amount of basalt fiber is 3.2Kg—6.0Kg / m 3 ;At the same time, the amount of cement is 3.0-4.0% (accounting for the total mass proportion), and the 7-day unconfined compressive strength is 2.5MPa-4.0MPa; at the same time, it is rolled and formed at a temperature of 20°C-30°C, preferably at 25°C. ; At the same time, the thickness of the base layer is greater than or equal to 360mm;

specific Embodiment 3

[0093] Xinglin Expressway K14+000—K17+000 uplink road section experimental construction, asphalt surface layer thickness 100mm; at the same time use bonding layer; at the same time anti-brittle cracking and shrinkage cracking semi-rigid base uses anti-brittle cracking and shrinkage cracking fly ash stabilized macadam ; Simultaneously anti-brittle, anti-shrinkage and anti-shrinkage fly ash stabilized macadam, the compacted thickness of the whole layer is greater than or equal to 280mm; at the same time, slaked lime: fly ash: crushed stone = 7:13:80; at the same time, it is crushed at a temperature of 20°C--30°C Press forming, preferably rolling forming at 25°C; at the same time, the thickness of the base layer is greater than or equal to 360mm; mineral material gradation The mineral material gradation adopts the gradation in Table 2.

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Abstract

The invention provides an ultra-thin asphalt pavement for high-grade highway. The high-grade highway ultra-thin asphalt pavement is specially used for expressways and first-grade highways and comprises an ultra-thin asphalt surface layer, a bonding layer, an anti-brittle-fracture anti-shrinkage-crack semi-rigid base layer, a subbase layer and a soil base, the ultra-thin asphalt surface layer, the bonding layer, the anti-brittle-fracture anti-shrinkage-crack semi-rigid base layer, the subbase layer and the soil base are arranged from top to bottom, the ultra-thin asphalt surface layer is paved on the anti-brittle-fracture anti-shrinkage-crack semi-rigid base layer, and the ultra-thin asphalt surface layer and the anti-brittle-fracture anti-shrinkage-crack semi-rigid base layer are combined through the bonding layer. The pavement rut damage is reduced, and a lot of pavement maintenance funds are saved; and the early damage phenomenon of the asphalt pavement is eliminated, road construction funds are saved, the service life of the pavement is prolonged, the long-life asphalt pavement can be constructed, and a large amount of road construction funds are saved.

Description

technical field [0001] The invention belongs to the technical field of highway asphalt pavement construction technology, and in particular relates to an ultra-thin asphalt pavement for high-grade highways, which is specially used for expressways and first-class highways. Background technique [0002] Highway grades are divided according to the use tasks, service functions, technical difficulty and traffic capacity of roads. Generally, roads are divided into five grades: expressways, first-class roads, second-class roads, third-class roads, and fourth-class roads. The main components of the road are roadbed, road surface, bridge, culvert, ferry terminal, tunnel, greening, communication, lighting and other equipment and other facilities along the road. High-grade highways refer to highways built with high design requirements and high construction standards so as to have high traffic capacity. High-grade highways include expressways and first-class highways. High-grade highway...

Claims

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Application Information

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IPC IPC(8): E01C7/32E01C19/47E01C19/48
CPCE01C7/325E01C19/47E01C19/48
Inventor 张靖张媛张岿张巍
Owner 张靖
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