Asphalt overlay treatment method of extreme-cold region cement concrete pavement
A technology of cement concrete and alpine regions, applied to cohesive pavement paved on site, roads, roads, etc., can solve the problems of high temperature stress of cement concrete slabs, poor surface treatment effect, and less technical research, and achieve Reduce maintenance costs, low maintenance and repair costs, good economic and social benefits
Inactive Publication Date: 2015-12-09
JINAN MUNICIPAL ENG DESIGN & RES INSITITUTE GRP
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Problems solved by technology
However, due to the climate characteristics, a large temperature stress is generated in the cement concrete slab, and the concrete expansion slab joints will reflect to the surface of the asphalt concrete as the temperature changes, so new cracks will continue to be generated on the concrete pavement
As a result, the overlay treatment effect of concrete pavement is not good, the maintenance time is short, and the pavement often needs major repairs
[0004] At present, there have been relevant researches on the overlay technology of cement concrete pavement, but there are few technical researches on the technology in Urumqi and other alpine regions
Method used
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[0048] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0049] Cement concrete pavement overlay technology is carried out on the premise of controlling cement concrete pavement diseases, the details are as follows: first investigate the common diseases of cement concrete pavement in alpine regions, analyze the diseases according to the climate characteristics of alpine regions, and put forward Disease treatment plan for existing concrete pavement. After investigation, common diseases include pits, wrong platforms, cracks, rotten edges and broken corners, voids at the bottom of the board, and surface peeling.
[0050] The treatment plan for common diseases is as follows:
[0051] 1. Pothole repair: Cut the sideline of the pit, parallel or perpendicular to the center line of the road, the cutting depth shall be determined according to the depth of the pit, which should be greater than 6cm, and the smooth surf...
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Abstract
The invention discloses an asphalt overlay treatment method of an extreme-cold region cement concrete pavement, which includes the following steps: 1) inspecting damages which occur in the extreme-cold region cement concrete pavement, designing corresponding treatment schemes on the basis of the damages and performing corresponding treatment; 2) after the damages are treated, milling the original cement concrete pavement and trimming and cleaning old pavement; 3) spraying bonding asphalt layer, and leveling the bonding asphalt layer with asphalt sand in preset thickness; (4) paving a glass fiber grating and paving coarse granular asphalt concrete in preset thickness on the glass fiber grating; and (5) paving SBS modified asphalt in preset thickness on the coarse granular asphalt concrete. The method is carried out with common equipment, so that the method is low in maintaining and repairing cost, is convenient in repairing, can save time and labor intensity, is good in repairing effect and has good economic and social benefit.
Description
technical field [0001] The invention relates to a cement concrete pavement overlay method, in particular to a technical method for cement concrete pavement overlay in alpine regions, and belongs to the technical field of road reconstruction and maintenance. Background technique [0002] Although the cement concrete pavement has the advantages of high rigidity, strong spreading load capacity, good stability and fatigue resistance, long service life, low maintenance cost, and convenient construction materials, some major roads in Urumqi adopt this type of pavement, but due to the The region has a large temperature difference between day and night, dry climate, hot summer and cold winter. The damage of the natural environment to the urban cement concrete pavement structure is concentrated in the cracks, and it increases the difficulty of repairing and curing the cracks in the concrete pavement structure, and puts forward higher requirements for the repaired pavement materials. ...
Claims
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IPC IPC(8): E01C7/32E01C7/35E01C11/00E01C11/06
Inventor 韩广魁蒋晓光王晓飞周骏张振东
Owner JINAN MUNICIPAL ENG DESIGN & RES INSITITUTE GRP