Method for testing surface energy of aggregate

A test method and aggregate technology, applied in the field of aggregate surface energy test, to achieve the effect of short test time, simple preparation process and good data reproducibility

Inactive Publication Date: 2014-01-29
TONGJI UNIV
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Problems solved by technology

The current evaluation methods and indicators are to judge the water stability of asphalt mixture from the macroscopic level, but rarely analyze the water damage process of asphalt mixture from the mechanism of water action, influencing factors, and water stability improvement measures and mechanisms. Research

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  • Method for testing surface energy of aggregate
  • Method for testing surface energy of aggregate
  • Method for testing surface energy of aggregate

Examples

Experimental program
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Embodiment 1

[0019] Example 1: Basalt, diabase, limestone, sandstone and granite were selected as aggregates. The density and water absorption of each aggregate are shown in Table 1. The test liquids were distilled water, ethylene glycol and formamide.

[0020] Specific steps are as follows:

[0021] 1. Obtain a sample of the required size. The aggregate obtained from the quarry is divided into 5cm×5cm×1cm samples by water sawing method;

[0022] 2. Polish the sample to obtain a smooth and flat surface. First use a polishing machine to polish the cut sample, then rinse the sample with clean water, dry it, and then use 240# water sandpaper to further polish the sample to obtain a uniform and flat aggregate surface;

[0023] 3. Clean the surface of the sample used in the test. Soak the sample in pre-prepared analytical pure alcohol (ethanol content ≥ 95%), then rinse with distilled water, and finally put it in a 100°C oven for 5 hours to dry, take it out and place it dry for later use;

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Abstract

The invention relates to a method for testing surface energy of an aggregate. The method comprises the following steps: A. dividing an aggregate obtained from a quarry into samples with sizes being 5cm*5cm*1cm by a water sawing method; B. polishing the samples to obtain a smooth and flat surface; C. performing surface cleaning to the tested sample; and D. opening testing software, adjusting a sample table and performing the test. The early preparation process in the testing method adopted by the invention is simple, the testing condition is easy to control, the testing time is short, the data processing is simple, the variable coefficient of the testing result is low, and the data reproducibility is good. The testing method lays the foundation for accurately acquiring the surface energy parameter.

Description

technical field [0001] The invention belongs to the field of road engineering, in particular to a method for testing the surface energy of aggregates. Background technique [0002] With the popularity of asphalt pavement, many engineering examples have proved that the water damage of asphalt pavement will seriously reduce the performance of pavement. The current evaluation methods and indicators are to judge the water stability of asphalt mixture from the macroscopic level, but rarely analyze the water damage process of asphalt mixture from the mechanism of water action, influencing factors, and water stability improvement measures and mechanisms. Research. In response to this problem, foreign scholars have found that the use of surface energy theory and testing methods to study the water stability of asphalt mixtures has very good results through continuous exploration. At present, the domestic research on the water damage of asphalt pavement mainly focuses on the explor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N13/00
Inventor 李立寒孙瑜
Owner TONGJI UNIV
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