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Testing method for activation effect of asphalt activator

A detection method and activator technology, which can be applied to measurement devices, surface/boundary effects, instruments, etc., can solve problems such as limitations and the difficulty of intuitive observation of the improvement effect of asphalt activators, and achieve intuitive measurement results, simple operation, and strong practicability. Effect

Active Publication Date: 2022-08-09
BEIJING UNIV OF CIVIL ENG & ARCHITECTURE
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Problems solved by technology

However, at room temperature, molecular thermal movement is inhibited, and it is difficult to observe the improvement effect of asphalt activators on the performance of old asphalt; and the test conditions at room temperature limit the application of traditional asphalt material test methods

Method used

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  • Testing method for activation effect of asphalt activator
  • Testing method for activation effect of asphalt activator
  • Testing method for activation effect of asphalt activator

Examples

Experimental program
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Effect test

Embodiment 1

[0086] Example 1 Testing method for improving effect of asphalt activator on diffusion and fusion ability of old asphalt

[0087] 1. Prepare old asphalt material

[0088] Trichloroethylene is used to extract old asphalt from waste asphalt pavement, and rotary evaporator is used to restore old asphalt.

[0089] 2. Preparation of old asphalt samples

[0090]The old asphalt was heated to a molten state in an oven at 150±5℃; the metal cubes and cube supports were cleaned, dried and heated to 60℃ for 60min. After the heat preservation, use a scraper to spread the asphalt on the sawtooth surfaces of the cube and the cube support respectively, so that the asphalt and the metal are fully bonded; cover the asphalt spread on the cube and the cube support with a glass sheet, and reserve the old asphalt to flatten the plane. Scrape off excess old asphalt with a razor blade and freeze it in a -15°C low temperature box until it is convenient to remove the glass sheet and expose the flat o...

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Abstract

The invention discloses a method for detecting the activation effect of an asphalt activator. The method comprises: extracting old asphalt in waste and old asphalt mixture, smearing the old asphalt on the sawtooth surfaces of cubes and cube supports respectively to obtain a smooth old asphalt surface, Apply an appropriate amount of activator between the old asphalt interfaces and combine the cube and the cube support to make the old asphalt interface in close contact, and the activator diffuses and fuses into the old asphalt for a certain period of time at the test temperature to obtain the activator test sample; use the cohesion tester to test The cohesive force of the test samples with different fusion times; the activation effect of the asphalt activator on the old asphalt is judged by the change of the cohesive force and the change of the interface morphology of the asphalt failure after the test. The invention provides a solution for the difficult observation of the activation process of the asphalt activator in the old asphalt at normal temperature and the difficulty in evaluating the activation effect.

Description

technical field [0001] The invention belongs to the field of road engineering, in particular to a method for detecting the activation effect of an asphalt activator. Background technique [0002] In the field of road engineering, with the development of the recycling technology of waste asphalt pavement materials, the cold recycling technology at room temperature has been applied more and more. The softening point and viscosity of the old asphalt in the recycled asphalt mixture (RAP) increase during the aging process, the penetration and ductility decrease, and the performance of the cementitious material deteriorates. The change of asphalt functional groups, the reduction of light component content, and the entanglement and aggregation of colloids and asphaltenes to form supramolecular structures are the main reasons for the deterioration of aging asphalt properties. Cohesion is the mutual attraction between adjacent parts within the same substance. This mutual attraction ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N33/00G01N13/00G01N13/04
CPCG01N33/00G01N13/00G01N13/04G01N2013/003Y02W30/91
Inventor 王佳妮高尚薛忠军侯芸董元帅李宝丰张健飞何昊南宋宇航
Owner BEIJING UNIV OF CIVIL ENG & ARCHITECTURE
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