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Asphalt mortar and aggregate adhesion evaluation method

An evaluation method, the technology of asphalt glue, applied in the direction of analyzing materials, strength characteristics, and using stable tension/pressure to test material strength, etc., can solve interface difficulties, different polishing degrees, and inability to accurately evaluate asphalt mixture resistance to water damage Performance and other issues

Pending Publication Date: 2022-01-18
同路达(泰州)生态科技有限公司 +2
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The current standard for drawing test is mainly AASHTO TP-91, and the degree of polishing used in the research is different, so the conclusions drawn are not comparable
And due to the research and development of higher-performance modified asphalt, it is more difficult for water to enter the asphalt and its interface with the slate. Aggregate adhesion is not representative, so the pull-out test cannot accurately evaluate the water damage resistance of asphalt mixture

Method used

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  • Asphalt mortar and aggregate adhesion evaluation method
  • Asphalt mortar and aggregate adhesion evaluation method
  • Asphalt mortar and aggregate adhesion evaluation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The significance of the influence of 400 SiC polished stone slabs on the results of the asphalt pull-out test is obtained by the following steps:

[0035] The pull-out test was carried out by combining 70# base asphalt, SBS modified asphalt and high-viscosity asphalt with basalt slabs with different polishing degrees, and the test was carried out after drying and water bath for 24 hours. The discreteness of parallel test results is as attached figure 1 As shown by the coefficient of variation, the coefficient of variation of 400SiC slate is the smallest. The significance of the degree of polish is shown in Table 1, and the degree of polish has a significant effect on variability.

[0036] Table 1 Analysis of variance for the influence of polishing degree on the coefficient of variation

[0037]

[0038] On the basis of the 70# matrix asphalt test piece, the length of the water bath was extended to measure the pull-out strength of 1 day, 2 days, 3 days, 5 days and 7...

Embodiment 2

[0042] The significant effect of 400 SiC polished slate on the results of the mortar pull-out test is obtained through the following steps:

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Abstract

The invention relates to an asphalt mortar and aggregate adhesion evaluation method. The method comprises the following steps: (1) preparing an asphalt mortar drawing test piece on a substrate; (2) curing the drawing test piece under drying and water bath conditions respectively; (3) carrying out a pull-out test on the cured pull-out test piece; and (4) obtaining the drawing strength, calculating the ratio of the drawing strength under the drying condition to the drawing strength under the water bath condition, and evaluating the adhesion between the asphalt mortar and the aggregate. Compared with the prior art, the method has the advantages that the influence of water and polishing degree on the adhesion of the asphalt-aggregate can be effectively analyzed, and the like.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a method for evaluating the adhesion between asphalt mortar and aggregates. Background technique [0002] Generally speaking, the methods for evaluating the water damage performance of mixtures can be divided into two categories, that is, tests on loose aggregates with asphalt on the surface and tests on shaped asphalt mixture specimens. The research on uncompacted loose asphalt mixture is aimed at the interaction between coarse aggregate and asphalt, that is, the evaluation object is loose mixture with large particle size, including boiling method, water immersion method, spectrophotometry, etc. However, the correlation between the test evaluation index and the water stability of asphalt pavement is not clear. In addition, the pull-out test can be used to test the adhesion between aggregates and asphalt and the cohesion of asphalt binder, which can effectively analyz...

Claims

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Application Information

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IPC IPC(8): G01N19/04G01N3/08G01N3/02
CPCG01N19/04G01N3/08G01N3/02G01N2203/0019G01N2203/0676
Inventor 李辉葛乃玲
Owner 同路达(泰州)生态科技有限公司