Low-dose cement modified graded broken stone base pavement

Abstract

The invention discloses a low-dose cement modified graded broken stone base pavement comprising an asphalt concrete pavement layer, an anti-seepage bonding layer and a soil foundation, wherein the anti-seepage bonding layer is paved above the soil foundation; the asphalt concrete pavement layer is paved above the anti-seepage bonding layer; a low-dose cement modified graded broken stone base is paved between the asphalt concrete pavement layer and the anti-seepage bonding layer. The low-dose cement modified graded broken stone base pavement has the advantages that structure is simple, construction is convenient and early destruction phenomenon can be avoided.

Description

technical field [0001] The invention relates to a pavement structure, in particular to a low-dose cement modified graded crushed stone base pavement. Background technique [0002] With the rapid development of my country's highway traffic, in order to meet the increasing needs of heavy-duty traffic, the road industry has carried out a lot of research on the semi-rigid base pavement structure formed by cement, lime and other inorganic binders stabilized by gravel. The semi-rigid base has good plate properties, high rigidity, high diffusion load capacity and bearing capacity, which reduces the maximum bending and tensile stress value of the asphalt pavement on it, thereby improving the asphalt pavement's ability to resist driving fatigue damage. ability. Therefore, semi-rigid base is widely used in the pavement base of high-grade highways, and more than 90% of the domestic expressways are semi-rigid base pavements. However, the inherent defects of the semi-rigid base layer, ...

AI Technical Summary

Problems solved by technology

[0005] However, since graded crushed stone is a kind of loose material, it generally has the disadvantages of large plastic deformation, low stiffness, poor stress diffusion ability, and poor erosion resistance. The source of gravel is poor, and it is difficult to strictly control the quality of a series of production and construction links such as crushing, processing, stacking, mixing, transportation, paving, and leveling, which will easily lead to unreasonable material structure grading and poor uniformity of the mixed material after molding. The effect cannot always be guaranteed. Excessive post-construction deformation will occur under the action of heavy traffic, which will affect the smoothness of the asphalt pavement. In severe cases, it will cause shear and fatigue damage to the asphalt surface.

At the same time, the anti-scourability is low, which aggravates the damage of asphalt pavement

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