A preventive maintenance functional layer and construction method for intelligent snow melting

Abstract

The invention relates to a preventative curing functional layer with an intelligent snow melting function and a construction method. The construction method comprises the steps that an old asphalt pavement is cleaned, and pavement diseases are repaired; modified emulsified asphalt and asphalt snow-melting layer materials are prepared; a layer of modified emulsified asphalt, a layer of fibers, a layer of modified emulsified asphalt and a layer of gravel are laid on the old asphalt pavement at the same time, and then the gravel is ground; and curing is conducted for 4-6 hours after grinding, redundant floating materials and impurities are recovered, then the asphalt snow-melting layer materials are scattered, and thus construction of the preventative curing functional layer with the intelligent snow melting function is completed. According to the preventative curing functional layer with the intelligent snow melting function and the construction method, an asphalt mortar netty structure is formed through the modified emulsified asphalt layers and the fiber layer, the structural strength is improved, and thus potential safety hazards of gravel flying are reduced; and the asphalt snow-melting layer materials permeate downwards through gravel gaps and are bonded with the asphalt mortar netty structure on the bottom layer to form an intelligent environment-friendly asphalt snow-melting layer so that ice and snow can be melted actively in ice and snow weather, and attenuation, caused by ice and snow, of the skid resistance of the pavement is avoided.

Description

【Technical field】 [0001] The invention belongs to the field of highway maintenance, and relates to an intelligent preventive maintenance functional layer for melting snow and a construction method. 【Background technique】 [0002] In recent years, my country's highways have developed rapidly, and the mileage of highways and expressways has doubled. By the end of 2015, the mileage of national grade highways was 4.0463 million kilometers, an increase of 145,500 kilometers over the end of the previous year. Graded roads accounted for 88.4% of the total road mileage, an increase of 1.0 percentage points. Among them, the mileage of secondary and above roads was 574,900 kilometers, an increase of 29,200 kilometers, accounting for 12.6% of the total road mileage, an increase of 0.3 percentage points. Affected by the increasing traffic volume and the climate environment, different types of early diseases have occurred, ranging from cracks, oil flooding, rutting, etc., to subsidence,...

AI Technical Summary

Problems solved by technology

After the construction is completed, the theoretically reasonable amount of modified emulsified asphalt can climb to more than two-thirds of the particle size of the gravel. In fact, the climbing height of the modified emulsified asphalt is limited, resulting in insufficient adhesion between the original road surface and the gravel. , under the action of driving load, there will be serious flying stones, especially when the vehicle is running at high speed, the flying stones are more serious, which will cause serious safety hazards to driving safety

[0008] (2) Single function: fiber asphalt gravel seal can improve the quality of old pavement, reduce network cracks, improve flatness, improve anti-skid performance, waterproof seepage, etc.; but single function, does not have self-melting snow function

[0009] (3) The dosage of asphalt is unreasonable: for road construction in mountainous areas, the dosage of modified emulsified asphalt proposed by existing patents is 1.5-2.0kg / m 2 It is relatively high, due to the large longitudinal slope of the linear design; construction according to the designed amount, the asphalt flow is serious, on the one hand, it wastes asphalt, on the other hand, it causes pollution to the environment

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