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Asphalt water-aging test method

A technology of aging test and asphalt, which is applied in the direction of material inspection products, etc., can solve the problems of ineffective analysis of water effect and lack of simulated asphalt water, etc., and achieve the effect of simple and feasible test method, good promotion value, and accurate and reliable test data

Inactive Publication Date: 2012-10-17
JIANGSU SHANSHUI ENVIRONMENT CONSTR GRP
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AI Technical Summary

Problems solved by technology

However, in the current indoor aging test, there is a lack of tests to simulate the aging of asphalt water, so the effect of water in the aging process of asphalt cannot be effectively analyzed.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0015] The asphalt sample preparation and equipment used in the test are the same as the pressure aging vessel accelerated asphalt aging test (T0630-2011) stipulated in the "Test Regulations for Asphalt and Asphalt Mixtures in Highway Engineering" (JTG E20-2011), that is, the samples used It is the residue obtained by the rotating film oven test method. The test instrument is a pressure aging vessel, and high temperature and compressed air are used to accelerate the aging of asphalt in the pressure vessel. The purpose is to simulate the oxidative aging of asphalt during road use; In the pressure aging container accelerated asphalt aging test (T0630-2011) stipulated in the "Test Regulations for Engineering Asphalt and Asphalt Mixtures" (JTG E20-2011), after preparing the samples, add 10g of water to each sample pan. It is to simulate the influence of moisture on the surface of asphalt during the use of pavement; according to the pressure aging container accelerated asphalt aging...

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Abstract

The invention discloses an asphalt water-aging test method. The method comprises the steps that: required asphalt samples and equipments are prepared according to a pressure-aging-vessel-accelerated asphalt aging test specified by highway engineering asphalt and asphalt mixture testing procedures; when the samples are prepared, 10g of water is added into each sample disk; before pressure adjusting, steam with a pressure of 0.2MPa is delivered in, and a total pressure is then adjusted to 2.1MPa according to a method specified by the procedures; when the test is finished, the hot residues in the disks are poured into a vessel; the residues are heated and stirred, such that the gas bubbles are removed, and a performance test can be carried out immediately; the performances of the asphalt obtained by the test is compared with the performances of original non-aged asphalt and the performances of aged asphalt obtained by merely the pressure-aging-vessel-accelerated asphalt aging test, such that the water-aging degree of the asphalt can be accurately determined. With the testing method provided by the invention, the test data is accurate and reliable, the test method is simple and feasible, and the testing is convenient. Therefore, the method has a good popularization value.

Description

technical field [0001] The invention is a test method for effectively evaluating the effect of water on asphalt aging, which not only helps to accurately evaluate the effect of water in the process of asphalt aging, but also helps to understand the mechanism and reason of asphalt performance aging in the actual use process The invention belongs to the technical field of highway asphalt pavement detection. Background technique [0002] The main factors affecting the aging of asphalt are heat, oxygen, light and water, etc. Different influencing factors act individually or interactively, changing the component compatibility and structural linking form of asphalt, and changing the properties of asphalt. [0003] Regarding the influence of water on the aging properties of asphalt, relevant studies have pointed out that although asphalt is a hydrophobic material, under the action of rainwater, the soluble substances in asphalt are washed away, which will also cause aging and deter...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/42
Inventor 袁浩马涛张静姚岗
Owner JIANGSU SHANSHUI ENVIRONMENT CONSTR GRP
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