Road surface structure of rolling flexiable fibre cement concrete as based and construction method thereof

Abstract

The present invention relates to road structure and construction technology, and is especially road structure with rolled flexible fiber cement concrete 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 cement concrete is formed through mixing flexible fiber, cement and water to form cementing material, adhering aggregate, stuffing, admixture, etc with the cementing material, and rolling. The rolled flexible fiber cement concrete has obviously improved early plastic shrinking, dry shrinking and hot shrinking performance, obviously raised anticracking performance, toughness, impact strength, frost resistance and erosion resistance, and doubled antifatigue performance. The road with the base layer of rolled flexible fiber cement concrete has raised performance and increased service life.

Description

1. Technical field [0001] The present invention relates to road engineering and other pavement projects and construction methods thereof, in particular to a pavement structure and construction method in which rolled flexible fiber cement concrete is used as the base layer. 2. Background technology [0002] Current background technology on pavement base materials and construction methods [0003] 1. Inorganic binder stabilizes aggregate base (semi-rigid base) [0004] Inorganic binder-stabilized aggregates are made by mixing inorganic binders (cement, lime, fly ash, etc.), aggregates (gravel, gravel, etc.) and water evenly to form a semi-rigid base mixture suitable for rolling. It is laid on the roadbed and rolled by a road roller to form a semi-rigid base layer, such as 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, both on general roads and expressways. More than 9...

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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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