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Design method of rigid-flexible composite basecourse road section based on asphalt pavement

A design method and asphalt pavement technology, applied in the direction of roads, roads, and on-site coagulation pavement, can solve the problems of easy horizontal shift, no healing ability, poor water permeability, etc., so as to maintain the quality of road use and reduce daily Maintenance, reducing the effect of rutting deformation

Inactive Publication Date: 2017-03-22
蒋新明
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

Its main disadvantages: 1. Reflective cracks; 2. Poor water permeability; 3. Sensitive to heavy loads; 4. No healing ability
[0009] The advantages of the flexible base are no reflective cracks, good water permeability, and insensitivity to heavy loads. The disadvantages are that it is prone to horizontal shifting, network cracks, sinking, and rutting, especially in channelized traffic sections.

Method used

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Embodiment Construction

[0046] The present invention will be further described below.

[0047] A method for designing a rigid-flexible mixed base based on asphalt pavement, the specific steps of which are as follows:

[0048] 1. Base material preparation

[0049] The base material is 40mm~60mm, 60mm~80mm or 20mm~40mm thick stone with a single particle size, which is conducive to the formation of the skeleton, and the larger particles are more conducive to interlocking. The particle size of the base material can be selected according to different traffic volumes. For heavy traffic, 60mm~80mm thick stones are preferred, for medium traffic, 40mm~60mm thick stones are preferred, and for light traffic, 20mm~40mm thick stones can be used. The base material is directly paved on the sub-base or the old road surface with a conventional water-stabilized paver.

[0050] 2. Filling preparation

[0051] The filler is conventional fine aggregate water-stabilized gravel with a maximum particle size of 19mm, whic...

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Abstract

The invention discloses a design method of a rigid-flexible composite basecourse of an asphalt pavement. The design method includes using large-diameter stones with single particle sizes as base materials in a design method of a semi-rigid basecourse of a conventional asphalt pavement to form a framework structure with a better inner frictional resistance, directly paving the base materials on a subbase course or an old road, using plant mixing fine aggregate cements as fillers, and using a road-mix method to mix the fillers with the base materials in a fixed proportion to form a stable pavement basecourse structure. The design method of the rigid-flexible composite basecourse based on the asphalt pavement has the advantages of greatly prolonging the service life of the road, reducing the times of overhaul and the frequency of daily maintenance, maintaining good road service performance and greatly decreasing the life cycle cost of the road.

Description

technical field [0001] The invention belongs to the design field of road building materials, and in particular relates to a design method of a rigid-flexible composite base road section based on asphalt pavement. Background technique [0002] Asphalt pavement refers to various types of pavement paved with asphalt materials mixed with mineral materials. Asphalt binder improves the ability of paving aggregates to resist road damage from driving and natural factors, making the road smooth, less dusty, impermeable and durable. Therefore, asphalt pavement is the most widely used high-grade pavement in road construction. [0003] The existing asphalt pavement structure consists of cushion course, subbase course and base course from bottom to top in order to have the uppermost surface course. [0004] The surface layer is a structural layer that directly bears the repeated action of the wheel load and the influence of natural factors, and can be composed of 1 to 3 layers. The su...

Claims

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Application Information

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IPC IPC(8): E01C7/32
CPCE01C7/32
Inventor 蒋新明
Owner 蒋新明
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