Testing method for dynamic shear complex modulus of bulk-phase asphalt rubber paste by considering substrate-adhesive cement interaction effect

An interactive, complex modulus technique used to test material strength, flow properties, measuring devices, etc. using a stable shear force, which can solve problems such as modulus errors

Active Publication Date: 2018-03-20
HARBIN INST OF TECH
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Problems solved by technology

[0005] The present invention solves the problem that there is an error in the dynamic shear complex modulus of the bulk asphalt mortar obtained by the test due to the neglect of the interaction

Method used

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  • Testing method for dynamic shear complex modulus of bulk-phase asphalt rubber paste by considering substrate-adhesive cement interaction effect
  • Testing method for dynamic shear complex modulus of bulk-phase asphalt rubber paste by considering substrate-adhesive cement interaction effect
  • Testing method for dynamic shear complex modulus of bulk-phase asphalt rubber paste by considering substrate-adhesive cement interaction effect

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specific Embodiment approach 1

[0057] Specific implementation mode 1: In this embodiment, the dynamic shear complex modulus test method of the bulk asphalt mortar considering the interaction between the substrate and the mortar is carried out according to the following steps:

[0058] 1. Dry the mineral powder in an oven at a temperature of 100°C to 110°C, then place the dried mineral powder and asphalt in an oven at a temperature of 155°C to 165°C, and heat for 4h to 6h to obtain heating mineral powder and heating bitumen;

[0059] 2. Put the heated asphalt in a constant temperature container with a temperature of 155°C to 165°C, and under the condition of a stirring speed of 350r / min to 450r / min, add the heated mineral powder to the heated asphalt in portions, and stir evenly to obtain asphalt mortar;

[0060] 3. Pour the asphalt mortar into the dynamic shear rheology test mold, and obtain the cylindrical original asphalt mortar specimen with a thickness of L' after the mortar specimen in the mold is coo...

specific Embodiment approach 2

[0072] Embodiment 2: This embodiment is different from Embodiment 1 in that: the mineral powder described in step 1 is limestone mineral powder. Other steps and parameters are the same as those in the first embodiment.

specific Embodiment approach 3

[0073] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is: the asphalt described in step one is 70# base asphalt. Other steps and parameters are the same as those in Embodiment 1 or 2.

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Abstract

The invention provides a testing method for dynamic shear complex modulus of bulk-phase asphalt rubber paste by considering a substrate-adhesive cement interaction effect, and relates to a dynamic shear complex modulus testing method, aiming at solving the problems that the tested dynamic shear complex modulus of the bulk-phase asphalt adhesive cement has errors, caused by the fact that the substrate-adhesive cement interaction effect is ignored by the dynamic shear complex modulus, tested by an existing method, of the bulk-phase asphalt adhesive cement. The method comprises the following steps: preparing an original asphalt adhesive cement test piece; testing to obtain dynamic shear complex modulus detection values G of the asphalt adhesive cement test piece corresponding to different testing thicknesses L; drawing an L/G-L curve diagram; carrying out linear fitting according to a formula L/G=A+1/G0L, so as to obtain a fitting linear function gradient 1/G0; then calculating to obtainbulk-phase asphalt adhesive cement modulus G after considering the substrate-adhesive cement interaction effect. According to the dynamic shear complex modulus testing method provided by the invention, a complicated microcosmic-macroscopic interaction effect spanning mechanism is greatly simplified and the substrate-adhesive cement interaction effect influence is accurately separated to obtain thereal dynamic shear complex modulus of the bulk-phase asphalt adhesive cement.

Description

technical field [0001] The invention relates to a dynamic shear complex modulus testing method. Background technique [0002] Accurately obtaining the physical and mechanical properties of materials plays an important role in the design of high-load and long-life asphalt pavement structures and the development of materials with excellent performance and durability. With the development of expressways in our country, asphalt pavement with excellent road performance has been widely used. In the process of asphalt pavement structural material design, construction, and later maintenance and repair, it is often faced with the testing and evaluation of the physical properties and road performance of asphalt materials. As the real binder in asphalt mixture, the essential function of asphalt mortar is to bond together coarse and fine aggregates with a certain gradation. In actual pavement materials, the physical and mechanical properties of asphalt mortar and the adhesive properti...

Claims

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Application Information

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IPC IPC(8): G01N3/24G01N11/00
CPCG01N3/24G01N11/00G01N2203/0025
Inventor 董泽蛟刘志杨杨晨周涛姚蒙阳
Owner HARBIN INST OF TECH
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