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Method for evaluating regeneration efficiency of asphalt regenerant

A technology of asphalt regenerant and regeneration efficiency, which is used in the application of stable shear force to test the strength of materials, instruments, sustainable waste treatment, etc. It can solve the problem that the action time cannot be accurately determined, and the asphalt regenerant lacks regeneration efficiency and proportion. minor issues

Pending Publication Date: 2022-05-27
JIANGSU ZHONGLU ENG DETECTION CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, asphalt regenerants lack an evaluation of regeneration efficiency, and it is impossible to evaluate the regeneration rate and effect of various regenerants; the amount of regenerants is too small compared to asphalt mixture, and it is difficult to mix evenly and regenerate evenly when added to the mixture The properties cannot be controlled artificially, and there is a lack of corresponding evaluation methods; the principle of action of most regenerants is to supplement the components in the asphalt to restore part of its plasticity. It is impossible to confirm that the regeneration agent will definitely have the effect of regeneration

Method used

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  • Method for evaluating regeneration efficiency of asphalt regenerant
  • Method for evaluating regeneration efficiency of asphalt regenerant
  • Method for evaluating regeneration efficiency of asphalt regenerant

Examples

Experimental program
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Effect test

Embodiment 1

[0033] Embodiment 1, a method for evaluating the regeneration efficiency of an asphalt regenerant, comprising the following steps: Step 1: Select the test temperature according to the usage of the regenerant and the type of asphalt. Generally, the road petroleum asphalt is selected as 100°C or 120°C, and the modified asphalt is selected as 130°C or 150°C. Step 2: Select the action time of the regenerant. In order to ensure that the regeneration effect of the regenerant can be exerted, the selected time period is set as three action times of 0.5h, 1h and 3h, and the phase angle curve of the regenerated asphalt corresponding to these three periods of time is used as the evaluation. Basis for the regeneration rate of the regenerant. Step 3: Use road petroleum asphalt or modified asphalt to conduct PAV test (JTG E20-2011T0630-2011). PAV test is an accelerated aging method of asphalt. Provide an air pressure of 2.1MPa±0.1MPa, put the asphalt sample into the pressure vessel, keep i...

Embodiment 2

[0034] Example 2, the method for evaluating the regeneration efficiency of the asphalt regenerant described in Example 1, in the step 1, the test temperature is selected according to the usage of the regenerant and the type of asphalt, 100 ° C or 120 ° C is selected, and 130 ° C is selected for the modified asphalt or 150°C.

Embodiment 3

[0035] Example 3, the method for evaluating the regeneration efficiency of the asphalt rejuvenating agent described in Example 1 or 2, in the step 3, the road petroleum asphalt or modified asphalt was used for the PAV test, and the temperature inside the pressure vessel was set to 100°C, And provide the air pressure of 2.1MPa, put the asphalt sample into the pressure vessel and keep it for 20h.

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Abstract

The invention relates to a method for evaluating the regeneration efficiency of an asphalt regenerant, in particular to a test method for evaluating the regeneration rate of the regenerant. A certain action time is given to the regenerant, the regenerated asphalt is subjected to a dynamic shear rheological test, and the regeneration rate of the regenerant is effectively represented by a phase angle to guide the mixing time during actual construction. The evaluation test method solves the regeneration effect of the regenerant. According to the method, a certain action time is given to the regenerant, the regenerated asphalt is subjected to a dynamic shear rheological test, the regeneration effects of different regenerant are analyzed by using the compound modulus and the rut factor, and the regenerant with a better regeneration effect and better applicability is helped to be selected.

Description

technical field [0001] The invention belongs to the evaluation of the regeneration efficiency of the rejuvenating agent of road petroleum asphalt and modified asphalt, and more particularly relates to a method for evaluating the regeneration efficiency of the asphalt regenerating agent. Background technique [0002] The regeneration of asphalt is the reverse process of aging. Usually can be mixed with regenerant, such as mixed with corn oil, lubricating oil and so on. After mixing with rejuvenating agent, the relative content of asphaltenes is reduced, and the dissolving ability of soft asphaltenes to asphaltenes is improved, the compatibility of asphalt is improved, and the penetration and ductility of asphalt are improved, so that the performance can be restored or close to the original. Asphalt regenerant is a thermally recycled asphalt mixture, suitable for the surface layer, middle surface layer and lower layer of asphalt pavement. [0003] At present, the asphalt reg...

Claims

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Application Information

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IPC IPC(8): G01N3/24G01N11/00G01N33/42
CPCG01N3/24G01N11/00G01N33/42G01N2203/0025G01N2203/0226G01N2203/0676G01N2203/0682Y02W30/91
Inventor 崔传炜关永胜张万磊翟金陵何文政吴军煜
Owner JIANGSU ZHONGLU ENG DETECTION CO LTD
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