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A detection method for the oil corrosion resistance of asphalt products
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A detection method and asphalt technology are applied in the field of detection of oil corrosion resistance of asphalt products, and can solve problems such as the inability to effectively simulate the corrosion of asphalt pavement.
Active Publication Date: 2020-10-30
CHINA HIGHWAY ENG CONSULTING GRP CO LTD +1
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Problems solved by technology
During the oil erosion process of asphalt pavement, under the action of vehicle load, most of them are dynamic oil erosion, and the published test methods cannot effectively simulate the actual corrosion of asphalt pavement
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Embodiment 1
[0066] The present embodiment provides a kind of detection method of the oil corrosion resistance of asphalt, comprises the following steps:
[0067] 1) Put asphalt into a beaker, the volume does not exceed 1 / 2 of the capacity of the beaker, and the measured mass is m 1 ;
[0068] 2) Simulate dynamic oil erosion: add diesel oil, the volume dosage is 20% of the capacity of the glass beaker, keep the beaker in a water bath, keep the temperature at 60°C; adjust the stirrer, keep the height of the stirring blades at 0.5cm from the asphalt surface, and start stirring , stirring speed 1000r / min, stirring time 4h;
[0069] 3) Stop stirring, pour out the oil corrosion solution, and dry it at 80°C for 2 hours. After cooling, weigh the obtained pitch and the mass of the beaker in m 2 , namely m 1 -m 2 is the mass m lost by asphalt after oil erosion relative to that before oil erosion;
[0070] 4) Calculation of oil corrosion coefficient:
[0071] m 1 769.5g, m 2 is 746.0g, m is ...
Embodiment 2
[0073] This embodiment provides a detection method for the oil corrosion resistance of asphalt. The asphalt sample A and the asphalt sample B are detected according to the steps described in Example 1. Each sample is sampled 3 times for detection respectively. The detection data and The obtained oil corrosion coefficients are shown in Table 1.
[0074] Table 1
[0075]
[0076] It can be seen that the oil corrosion degree of asphalt sample A is greater than that of asphalt sample B, and the oil corrosion resistance of asphalt sample B is better than that of asphalt sample A.
Embodiment 3
[0078] This embodiment provides a method for detecting the oil corrosion resistance of asphalt mixture, comprising the following steps:
[0079] 1) Put the asphalt mixture into the test mold to make a Marshall test piece, weigh the total mass m 1 ;
[0080] 2) Simulate dynamic oil erosion: add diesel oil, the volume dosage is 20-40% of the test mold capacity, keep the height of the mixing blade at 0.5cm from the asphalt surface, start stirring, the stirring speed is 1000r / min, and the stirring time is 4h;
[0081] 3) Stop stirring, remove the oil corrosion solution in the product obtained in step 2), if any mineral material falls off, pour out the mineral material together. Then place the obtained test piece at 80°C to dry for 2 hours, after cooling, weigh the total mass of the obtained Marshall test piece m 2 ; ie m 1 -m 2 is the mass m of asphalt mixture lost after oil erosion relative to that before oil erosion;
[0082] 4) Carry out the abrasion test according to ASTM...
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Abstract
The invention relates to a method for detecting the oil corrosion resistance of asphalt products. The method includes simulating dynamic oil corrosion; loading the asphalt products in containers, adding pollution oil into the containers and allowing the pollution oil to sufficiently cover the upper surfaces of the asphalt products; stirring the pollution oil by the aid of stirrers and keeping thedistances from stirring blades to the upper surfaces of the asphalt products ranging from 0.5 cm to 1.5 cm. The method is a method for testing the oil corrosion resistance of asphalt and asphalt mixtures under comprehensive and dynamic oil corrosion conditions. Compared with the prior art, the method has the advantages that actual oil corrosion situations of asphalt pavements can be effectively simulated by the aid of the method; oil corrosion coefficient computational formulas are proposed, mass loss is taken into account, area parameters are further introduced, and accordingly oil corrosionsituations in the unit area can be reflected by results; existing methods are mostly applicable to comparative experiments, but the method not only is applicable to the comparative experiments, but also can be individually used for testing the oil corrosion degrees of the asphalt and the asphalt mixtures.
Description
technical field [0001] The invention relates to a method for detecting the oil corrosion resistance of asphalt products. Background technique [0002] Asphalt pavement has been widely used in highway construction because of its good driving comfort and performance. However, asphalt is a polymer mixture composed of saturated components, aromatic components, colloids and asphaltenes. Based on the principle of similar compatibility, it is easily soluble in organic solvents such as gasoline, coaltar, and diesel. [0003] The harmful oil pollution on the asphalt pavement makes the asphalt dissolve, and the road surface becomes loose and threshed locally, resulting in a decrease in the anti-skid performance of the asphalt pavement, and the performance of high temperature and low temperature is greatly affected. The oil erosion of the asphalt pavement has the characteristics of fast penetration speed and deep penetration depth , strong corrosion ability, and long-lasting impact. ...
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