Self-inflow type semi-flexible composite pavement and construction method thereof

Abstract

The invention relates to a semi-flexible composite pavement of which mixed cement slurry can automatically flow in holes of an asphalt mixture in a construction process. The composite pavement comprises an open-graded macro-porous asphalt mixture structure layer and pavement mortar which is filled in the holes of the macro-porous asphalt mixture, wherein the pavement mortar comprises 30 to 50 percent cement, 20 to 40 percent of sand, 2 to 4 percent of organic binder, 10 to 20 percent of active filler, 3 to 10 percent of shrinkage reducer, 0.2 to 0.5 percent of water reducer, 0.1 to 1 percent of early strength agent and water in an amount of 20 to 28 percent based on the total weight of all the components of the pavement mortar. The composite pavement of the invention has the advantages of high compression strength, short maintenance time, smoothness, compactness, seamlessness, skid resistance, wear resistance, crack resistance, durability and convenient construction. The invention also provides a construction method of the semi-flexible composite pavement. The method comprises the steps of base pavement treatment, open-graded asphalt mixture paving, on-spot pavement mortar stirring and grouting, maintenance and the like. In the construction method of the invention, the mortar is automatically filled in the holes of the asphalt mixture according to the gravity per self and high workability and fluidity, so influences which are caused by adopting vibration paving on asphalt frameworks are avoided.

Description

technical field [0001] The invention relates to a pavement, in particular to a semi-flexible composite pavement which is formed by filling high-performance cement mixing slurry in an open-graded asphalt mixture and has the advantages of both asphalt pavement and cement concrete pavement, and more specifically relates to a During the construction process, the cement mixture slurry can automatically flow into the semi-flexible composite pavement in the pores of the asphalt mixture. The present invention also relates to a construction method of the self-flowing semi-flexible composite pavement. Background technique [0002] my country's traditional highway and urban road pavement is basically divided into two categories, one is asphalt pavement, and the other is cement concrete pavement. These two types of road surfaces have their own advantages in use, but there are also many problems. For example, asphalt pavement mainly has disadvantages such as low bearing capacity, high t...

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Problems solved by technology

The semi-flexible composite pavement is still in the experimental paving stage in my country at this stage. From the paved road sections, it can be found that the overall compressive strength of the pavement is low and requires a long maintenance time (generally 5-7 days) In addition, the injection of cement slurry needs to be supplemented by slight vibration, which will affect the skeleton of the asphalt mixture.

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