Structure of foamed asphalt cold-recycled pavement and construction technology thereof

Abstract

The invention belongs to the field of road maintenance and construction, and particularly relates to the structure of a foamed asphalt cold-recycled pavement and a construction technology thereof. According to key points of the technical scheme of the structure, a reinforcing layer, a protective layer, a recycled asphalt concrete layer and an asphalt concrete layer are included successively from bottom to top, wherein the reinforcing layer is made from a mixture of gravel and cement, and the protective layer includes a calcium oxide layer and a biodegradable plastic layer encapsulating the calcium oxide layer. The reinforcing layer is reinforced and leveled with the gravel and the cement, later laying of the protective layer is convenient, the calcium oxide layer of the protective layer isencapsulated in the biodegradable plastic layer, and calcium oxide is prevented from being affected with damp during construction. Biodegradable plastics degrade after a certain time, the calcium oxide layer is exposed, water in the air or from melted snow penetrates into the calcium oxide layer and reacts with calcium oxide to form calcium hydroxide, heat is released, the temperature of the pavement is increased advantageously, and then frost resistance and crack resistance of the pavement under the low temperature are improved.

Description

technical field [0001] The invention belongs to the field of road maintenance and construction, and more specifically relates to foamed asphalt cold regeneration pavement structure and construction technology. Background technique [0002] Under the background of my country's sustained and rapid economic development, increasingly heavy traffic volume and increasing axle load, more and more roads have entered the maintenance period one after another. The focus of the road industry in some economically developed areas in my country has taken the lead in shifting from new road construction to large and medium-sized repairs and maintenance. Therefore, how to dispose of tens of millions of tons of asphalt concrete pavement waste every year will become a problem that must be faced and solved. At the same time, the large amount of asphalt and stone required to resurface asphalt concrete roads will also put us under enormous pressure on resources. This just needs to find an econom...

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Problems solved by technology

[0005] However, the above-mentioned technical scheme does not take into account the antifreeze effect of roads in cold weather in the north. In the winter in the north, the cracked road surface has seriously affected people's travel, and has also brought great difficulties to construction. How to make rational use of recycled materials, And improving the anti-freezing and anti-cracking ability of the pavement is an urgent problem to be solved.

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