A road pavement or airport pavement pavement structure, preparation method and pipe mold

Abstract

The invention discloses a road pavement or airfield pavement paving structure. The road pavement or airfield pavement paving structure comprises the following components in parts by weight: 60-65 parts of coarse aggregate, 39-43 parts of fine aggregate, 25-28 parts of cement, 11-13 parts of water, fibers, 0.5-0.6 part of a water reducer, 0.012-0.02 part of coagulation-acceleration and early strength agent, and 0.05-0.06 part of a defoaming agent, wherein the volume of the fibers accounts for 0.60%-0.85% of the total volume of the road pavement or airfield pavement paving structure; the paving structure, from the top surface to the bottom surface, comprises a coarse aggregate layer, a coarse-fine aggregate transition layer, a fine aggregate layer and a fiber layer which are sequentially arranged. Mechanical property of the paving structure can be adapted to the graded distribution rule of stress of the road pavement and the airfield pavement, and the paving structure is long in service life; meanwhile, the invention further provides a preparation method for the paving structure, and the preparation method can be used for preparing the paving structure in graded distribution. The invention further provides a pipe die which enables a material surface to have skid resistance.

Description

technical field [0001] The invention belongs to the field of road materials, and in particular relates to a road pavement or airport pavement pavement structure, a preparation method and a pipe mold. Background technique [0002] Road pavement and airport pavement often use cement concrete as road pavement and airport pavement materials. Cement concrete has the advantages of wide source of raw materials, simple manufacturing process, and convenient application. However, cement concrete road slabs and road slabs also have disadvantages such as low tensile strength, poor toughness, and easy crack expansion. The flexural tensile strength of concrete is much lower than the compressive strength. When the ultimate flexural strength is reached, the cement concrete slab will fracture and fail, and under repeated loads, the concrete slab will fail when it is lower than its ultimate flexural strength due to the fatigue effect. In addition, the temperature difference in the thickness ...

AI Technical Summary

Problems solved by technology

However, ordinary concrete can be regarded as a homogeneous material because it is evenly mixed during construction, and its mechanical properties at various positions are basically the same. Surface) The characteristics of the actual stress distribution inside the surface layer, especially the tensile strength is consistent along the thickness direction. Under the actual load, the maximum tensile stress generated at the bottom of the cement concrete slab is easy to exceed the tensile strength, resulting in cracks and damage

In addition, ordinary cement concrete is a brittle material with poor deformation ability, and its elastic modulus is much higher than that of the base layer (such as cement stabilized aggregates). Excessive bending and tensile stress will be generated, which will lead to cracking and failure

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