Pavement crack pouring material and preparation method and application thereof

Abstract

The invention provides a pavement crack pouring material and a preparation method and application thereof. The pavement crack pouring material is prepared from a material comprising the following components: 80 weight parts to 100 weight parts of asphalt, 3 weight parts to 15 weight parts of fibers, 1 weight part to 160 weight parts of filler, 1 weight part to 6 weight parts of water and 0.1 weight part to 2 weight parts of foaming agent. Compared to the prior art, the pavement crack pouring material provided by the invention adopts the components with specific content and achieves a good interaction, and the obtained pavement crack pouring material has low viscidity and good liquidity in the construction process and can well enter a deep position of a crack in a normal temperature state;the pavement crack pouring material has high adhesion stress after being cured, has good elastoplasticity and is good in environmental adaptability, and the pavement crack pouring material contains acertain sealed air holes, and thus, thermal expansion and contraction deformation of the crack, which is generated under the high and low temperature action, can be improved; and thus, pavement conditions and actual construction requirements can be met, and the pavement crack pouring material is a crack pouring material applicable to various asphalt pavements such as a highway, a municipal serviceroad, a rural highway and the like.

Description

technical field [0001] The invention relates to the technical field of traffic construction, and more specifically relates to a pavement joint filling material and its preparation method and application. Background technique [0002] The semi-rigid base has almost become the only structural form in the construction of high-grade highways in our country. While the research and application of semi-rigid base asphalt pavement has achieved world-renowned achievements, with long-term application and research, it is found that there are still some problems in the high-strength semi-rigid base, mainly manifested as transverse shrinkage cracks and pavement internal stagnation. water. [0003] There are many factors affecting the cracking of semi-rigid base asphalt pavement, such as the properties of asphalt and asphalt mixture, the properties of base materials, climate conditions, traffic volume and vehicle types, route direction and subgrade conditions, and construction factors. ...

AI Technical Summary

Problems solved by technology

The existence of a large number of cracks will inevitably reduce the performance of the pavement. For example, the deflection at the cracks will increase to accelerate the bending failure of the surface layer. At the same time, the elastic modulus of the semi-rigid base layer at the cracks will decrease significantly, which will affect the overall strength of the pavement structure.

[0004] Because the rainwater and snowwater infiltrating from the cracks in the asphalt layer stay in the asphalt mixture structure layer, the snowwater and rainwater may infiltrate along the cracks in the surface layer to soften the base layer and reduce the bearing capacity. The semi-rigid base makes the water infiltrated through the cracks in the pavement stagnate on the top of the base and cannot be discharged. Under the action of water erosion and dynamic water pressure, it will reduce the adhesion between asphalt and stone and the durability of asphalt mixture, making the pavement Spalling, looseness, potholes, oil flooding, rutting and other diseases will occur, which will affect the strength of the road surface; and will gradually soften and scour the base course and surface course, resulting in unfavorable factors such as base pumping and asphalt mixture loosening, especially in seasonally frozen areas. The reason for frost heaving is that under the repeated action of freezing and thawing, it will cause damage to the surface layer and the base layer, and eventually cause the base layer to lose its support and connection with the surface layer, so that the asphalt surface layer will be damaged such as network cracks, which will aggravate the damage of the road surface. shortened service life

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