Method for testing effective mixing amount of direct-vat-set high-viscosity asphalt modifier

Abstract

The invention discloses a method for testing the effective mixing amount of a direct-vat-set high-viscosity asphalt modifier. The method comprises the following steps: 1, inspecting the basic properties of an asphalt material, a high-viscosity modifier and aggregate; 2, preparing an asphalt mixture by adopting a direct-vat-set preparation method, and extracting by utilizing an asphalt extractor and a rotary evaporator to obtain a direct-vat-set high-viscosity asphalt sample; 3, preparing a high-viscosity asphalt sample by adopting a traditional shearing method; 4, preparing an atomic force sample; 5, testing the asphalt sample, drawing an adhesive force-displacement curve of the high-viscosity asphalt sample, and calculating the adhesive dissipation energy of the high-viscosity asphalt sample; and 6, taking the adhesion dissipation energy of the high-viscosity asphalt sample prepared by the traditional shearing method as an index of 100% modification of the asphalt by the high-viscosity modifier. According to the invention, the adhesion dissipation energy of a high-viscosity asphalt sample prepared by a direct-vat-set method is used as an analysis object, the blending efficiency ofa high-viscosity modifier in asphalt in a direct-vat-set asphalt mixture is calculated, and the effective blending amount of the high-viscosity modifier to the asphalt is quantitatively analyzed.

Description

technical field [0001] The invention relates to a method for testing the effective dosage of direct-throwing high-viscosity asphalt modifier, which belongs to the technical field of road engineering. Background technique [0002] Drainage asphalt pavement has been more and more widely used in the road industry due to its good drainage performance, safety and driving comfort. However, due to the traditional high-viscosity asphalt used in drainage asphalt mixtures, the high-viscosity agent is dispersed into the asphalt through strong shearing, and then added to the aggregate for mixing. This process consumes a lot of energy, and the high-viscosity agent and asphalt in Aging is prone to occur during the shearing process, and stabilization is required to prevent the polymer from segregating from the asphalt. At the same time, due to the high viscosity, the transportation is difficult, which makes the preparation process cumbersome and the overall cost is high. In the mixing pro...

AI Technical Summary

Problems solved by technology

[0009] Purpose of the invention: Aiming at the problems and deficiencies in the prior art, the present invention provides an evaluation and detection index of effective dosage to solve the problem of insufficient testing index of direct-injection asphalt mixture, unknown content of effective modifier, and inability to accurately estimate The Problem of Effective Dosage in Direct Throwing Type High Viscosity Asphalt Mixture

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