Method for correcting production mix proportion of high-viscosity rubber skeleton void type asphalt mixture

Abstract

The invention discloses a method for correcting the production mix proportion of a high-viscosity rubber skeleton void type asphalt mixture. The method comprises the following steps: S1, calculating a designed mix proportion; S2, adjusting the high-temperature volume ; S3, initially adjusting the asphalt-aggregate ratio; S4, determining the mixing amount of rubber; S5, determining the asphalt-aggregate ratio; S6, inspecting the asphalt-aggregate ratio; and S7, performing performance inspection. According to the method disclosed by the invention, influence of high temperature of a production environment on swelling and dissolution of rubber is considered when the production mix proportion of the asphalt mixture is corrected, and when rubber particles are used for replacing aggregate, the swelled and dissolved rubber is used for replacing the isopyknic aggregate, influence on the structure of the mixture due to the change of the volume of the rubber is reduced, new indexes are adopted, the optimal asphalt-aggregate ratio is determined, the asphalt-aggregate ratio is detected by considering the influence on the structure under the dual action of water and changing temperature aiming at the structural characteristics of the high-viscosity rubber particle skeleton void type asphalt mixture, the use performance of a pavement is improved, and the service life of the pavement is prolonged.

Description

technical field [0001] The invention relates to the technical field of traffic civil engineering, in particular to a production mixing ratio correction method for high-viscosity rubber skeleton void type asphalt mixture. Background technique [0002] At present, the existing method for correcting the mix proportion of high-viscosity rubber particle skeleton void type asphalt mixture has the following deficiencies: [0003] (1) The existing correction method does not take into account the influence of the high temperature throughout the production process on the high-viscosity rubber particle skeleton void type asphalt mixture. High temperature will cause the rubber to swell and dissolve, resulting in a change in volume, thereby destroying the mixture. Mechanical stability, causing a series of road surface diseases; [0004] (2) The existing correction method does not accurately adjust the asphalt ratio of the high-viscosity rubber skeleton void type asphalt mixture. Due to ...

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Problems solved by technology

[0003] (1) The existing correction method does not take into account the influence of the high temperature throughout the production process on the high-viscosity rubber particle skeleton void type asphalt mixture. High temperature will cause the rubber to swell and dissolve, resulting in a change in volume, thereby destroying the mixture. Mechanical stability, causing a series of road surface diseases;

[0004] (2) The existing correction method does not accurately adjust the asphalt ratio of the high-viscosity rubber skeleton void type asphalt mixture. Due to the absorption of asphalt by rubber, the asphalt ratio of the mixture is too low, and the aggregate cannot be bonded to form a whole , have an impact on road performance;

[0005] (3) The existing correction method does not test the asphalt ratio of the high-viscosity rubber-skeleton void-type asphalt mixture, and does not consider that the high-viscosity rubber-skeleton void-type asphalt mixture is easy to peel off and drop grains in a water-containing environment, and its durability is poor. And in the case of external temperature changes, it is more prone to diseases;

[0006] (4) In the existing high-viscosity rubber particle skeleton void type asphalt mixture design method, when forming Marshall specimens, single-stage compaction molding is adopted, but the rubber has high elasticity at high temperature and is not easy to compact

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