Method for testing real viscosity of rubber asphalt and equipment of method

Abstract

The invention discloses equipment for testing the real viscosity of rubber asphalt. A plurality of heating rods are arranged inside the side wall of a shell; an ellipsoid metal shell is arranged inside the shell; an ellipsoid filtering net is positioned inside the ellipsoid metal shell; a wide threaded rotor is arranged inside the ellipsoid filtering net; a guide tube is connected with the bottomof the ellipsoid metal shell; a conveyer belt is arranged around the wide threaded rotor on the upper side of the ellipsoid metal shell. The invention further provides a method for testing the real viscosity of rubber asphalt. The rubber asphalt filtering equipment disclosed by the invention is simple, intelligent and convenient to operate, molten rubber asphalt can be filtered by using a 200-meshsieve, filtered waste tire rubber powder can be discharged outside the equipment, heat preservation can be also achieved, properties of the rubber asphalt can be maintained, and the heat preservationtime can be shortened for later viscosity testing; the testing accuracy can be remarkably improved since the filtered rubber asphalt is tested at five different rotation speeds instead of one rotation speed, and errors can be reduced.

Description

technical field [0001] The invention belongs to the technical field of road building materials, in particular to a method and equipment for measuring the real viscosity of rubber asphalt. Background technique [0002] The modified asphalt binder produced by mixing waste tire rubber powder into ordinary matrix asphalt under certain conditions has good road performance and special effects in solving waste tire solid pollution, saving energy and protecting the environment. It occupies an important position in various methods of asphalt modification, and has been rapidly popularized and applied in China in recent years. [0003] Adding waste tire rubber powder to base asphalt can significantly increase the viscosity of asphalt, and improve the shear resistance and elastic recovery ability of the binder. Viscosity index is the most important index to evaluate rubber asphalt, it can directly reflect the use performance and construction operability of rubber asphalt. At present, ...

AI Technical Summary

Problems solved by technology

[0008] (1) The fineness of waste tire rubber powder for road use is mostly 30 mesh to 80 mesh, and the waste tire rubber powder particles will expand after reacting with asphalt swelling. When testing in the sample container of the meter, the friction force brought by the cement to the rotor is uneven. When there is more waste tire rubber powder around the rotor, the viscosity will be higher, and when there is less rubber powder, the viscosity will be smaller. The test results are inconsistent. Uniform, false viscosity is more common;

[0009] (2) For the viscosity data, the data directly read by SC4-27 rotor and 20r / min are used as the viscosity value. This data reading method has a large gap with the actual rubber asphalt viscosity, and cannot truly and accurately express the rubber asphalt. viscosity

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