Method for preparing polyurethane rubber granule mixture for pavement self-stress icebreaking

Abstract

The invention discloses a method for preparing polyurethane rubber granule mixture for pavement self-stress icebreaking, and relates to rubber mixture. The method comprises the steps of firstly, mixing various grain sizes of gravels and rubber particles for 60s at room temperature, obtaining gravel and rubber particle mixture, adding bi-component polyurethane glue which is modulated by a component A and a component B mixed for 120s at room temperature, mixing for 120s at room temperature, obtaining mixture of the gravel and rubber particles and the polyurethane glue; adding mineral powder to mix for 60s at room temperature, and preparing the polyurethane rubber granule mixture for pavement self-stress icebreaking. The mixed pavement material generates large compressive deformation in use, resulting in that the tensile stress and the shear stress inside an ice layer are obviously increased, so that the ice layer cracks. The ice layer is damaged under reciprocal action of vehicle tires, so as to overcome the problem that accumulated snow and frozen ice on the pavement cannot be effectively solved in the pavement paving material of inhibiting congelation in the prior art and the defects of poor pavement performance, low durability and non-environmental performance.

Description

technical field [0001] The technical solution of the invention relates to a rubber mixture, in particular to a preparation method of polyurethane rubber particle mixture used for self-stressed icebreaking on road surfaces. Background technique [0002] At present, the technical measures to solve the problem of road snow icing at home and abroad can be mainly divided into chemical deicing methods and physical deicing methods according to the different mechanisms of action. [0003] The chemical deicing method is to reduce the melting point of ice and snow by spreading chemical deicing agent on the road surface, so as to melt the ice and snow, so as to achieve the purpose of removing ice and snow. The short-term effect of chemical deicing and snow removal method is better, and it is widely used at present. Its obvious defect is that it will cause the durability of asphalt pavement of some highways and airports to decline, and there will be different forms of deterioration and ...

AI Technical Summary

Problems solved by technology

[0011] The technical problem to be solved by the present invention is: to provide the preparation method of the polyurethane rubber granule mixture that is used for self-stressed ice breaking on the road surface, which is to use polyurethane with better durability and stronger cohesive force instead of asphalt as the cementing material, adding Grinding waste rubber particles and coarse and fine aggregates to make a preparation method of polyurethane rubber particle mixture for road surface self-stress icebreaking. When applied, the mixture material produces large compression deformation, which leads to tensile stress in the ice layer. The local tensile stress and shear stress are greater than the ultimate tensile strength and ultimate shear strength of the ice, which leads to the fracture of the ice layer. Under the repeated action of the vehicle tires, the ice layer is gradually destroyed, and with the vehicle tires The movement of the original road surface is exposed, and the anti-skid ability of the road surface is gradually restored. In addition, the mixture has high temperature stability, low temperature crack resistance, high water damage resistance, peeling resistance and durability after molding, thus overcoming the current situation. The existing technical anti-freeze pavement materials cannot effectively solve the problem of snow and ice on the road area and the shortcomings of poor road performance, low durability and environmental protection

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