Road surface structure of felexiable fibre emulsifying asphalt stable material as base and construction method thereof

Abstract

The present invention relates to road structure and construction technology, and is especially road structure with flexible fiber and emulsified asphalt stabilized aggregate layer as the base layer and its construction process. The road structure includes one bottom layer; one base layer and one paved surface layer, and the base layer of rolled flexible fiber and emulsified asphalt stabilized aggregate is formed through mixing flexible fiber, emulsified asphalt, cement and water to form cementing material, adhering aggregate, stuffing, admixture, etc with the cementing material, and rolling. The rolled flexible fiber and emulsified asphalt stabilized aggregate has improved early plastic shrinking, dry shrinking and hot shrinking performance, obviously raised anticracking performance, toughness, impact strength, frost resistance, erosion resistance and water stabilty, and doubled antifatigue performance. The road with the said base layer has raised performance and increased service life.

Description

1. Technical field [0001] The invention relates to pavement engineering such as road engineering and a construction method thereof, in particular to a pavement structure and a construction method in which flexible fiber emulsified asphalt stabilized aggregate is used as a base layer. 2. Background technology [0002] Current background technology of pavement base material and emulsified asphalt application [0003] 1. Inorganic binder stabilizes aggregate base (semi-rigid base) [0004] Inorganic binder stabilized aggregate is to mix inorganic binder (cement, lime, fly ash, etc.), aggregate (gravel, gravel, etc.) It is paved on the roadbed and rolled by a road roller to form a semi-rigid pavement base, such as a cement-stabilized gravel base, cement-stabilized gravel base, lime fly ash gravel base, etc. Semi-rigid base pavement has been widely used in our country, whether it is general roads or expressways. More than 90% of the asphalt pavement or cement pavement of my co...

AI Technical Summary

Problems solved by technology

[0019] However, in the pavement structure of the asphalt-stabilized macadam base, the tensile stress at the bottom of the base layer is relatively large, and the possibility of fatigue cracking at the bottom of the layer is also the greatest under the repeated action of bending and tensile stress, so it is required to have good durability, especially It has excellent anti-fatigue performance, and as a load-bearing layer, it requires a certain anti-rutting ability and stability, and the asphalt stabilized macadam base needs to be improved in this respect

[0020] In addition, the asphalt in the current asphalt-stabilized aggregate base is generally used as hot-mix asphalt, and the asphalt needs to be heated to about 150°C-160°C, the aggregate is heated to about 160°C-175°C, and the asphalt and aggregate are mixed. The ex-factory temperature should be controlled at 150°C to 165°C, the paving temperature should not be lower than 145°C, the initial pressure temperature should not be lower than 135°C, and the final pressure temperature should not be lower than 80°C, and it cannot be carried out when the temperature is low in winter Construction, therefore, the mixing and construction of hot-mix asphalt stabilized aggregates have high and complex requirements. At the same time, hot-mix asphalt not only pollutes the environment, but also accelerates the aging of asphalt under high temperature for a long time, affecting the durability of asphalt stabilized aggregates sex

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