Method for determining mixing amount of old material in recycled asphalt mixture

A technology for reclaiming asphalt and determining methods, applied in measurement devices, analytical materials, instruments, etc., can solve the problems of incomplete evaluation of the shear strength of asphalt mixtures, cumbersome methods for determining the dosage, and inability to simulate well. Save testing time, save time and energy, and achieve good road performance

Pending Publication Date: 2022-03-22
中化学交通建设集团第二工程有限公司
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0009] The above-mentioned patented technology provides technical support for calculating the dosage of new and old asphalt and new and old aggregates, and greatly promotes the technical development of the exploration and research on the method of determining the dosage of asphalt mixture. Although the current asphalt mixture The method for determining the amount of old materials can be used to determine the blending of old materials, but there are still some defects. First, the methods for determining the amount of old materials in recycled asphalt mixtures used in the above-mentioned patents are relatively cumbersome, and the detection period is long
Second, the Marshall design method is applied to determine the mix ratio of asphalt mixture, because Marshall's impact compaction can not simulate the actual road compaction well, and the Marshall stability method cannot fully evaluate the shear strength of asphalt mixture
Conversely, paving the pavement surface with this asphalt mixture can lead to premature cracking

Method used

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  • Method for determining mixing amount of old material in recycled asphalt mixture
  • Method for determining mixing amount of old material in recycled asphalt mixture
  • Method for determining mixing amount of old material in recycled asphalt mixture

Examples

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Embodiment 1

[0032] like figure 1 , 2 As shown in , 3, a method for determining the amount of old materials in recycled asphalt mixture, first obtain the surface energy of the new asphalt test specimen and the old asphalt test specimen, and then preset the surface energy of the required recycled asphalt, Finally, bring it into the calculation formula to get the amount of old materials in the required recycled asphalt. The specific steps are as follows:

[0033] (1) First clean the glass slide with distilled water to remove surface dust and other impurities, wipe the surface of the glass slide with absorbent cotton balls, and dry it close to a thermal electric furnace. Heat to 150°C, use a brush to dip a little drop onto the glass slide, slightly tilt the glass slide to make the asphalt flow slowly on the surface of the slide until it is smooth and free of bubbles, and the thickness of the asphalt on the prepared glass slide specimen is 1.5mm , put the finished new asphalt test specimen i...

Embodiment 2

[0045] A method for determining the amount of old materials in recycled asphalt mixtures. First obtain the surface energies of new asphalt test specimens and old asphalt test specimens, then preset the surface energy of the required recycled asphalt, and finally bring it into the calculation formula Get the amount of old material in the required recycled asphalt, the specific steps are as follows:

[0046] (1) First clean the glass slide with distilled water to remove surface dust and other impurities, wipe the surface of the glass slide with absorbent cotton balls, and dry it close to a thermal electric furnace. Heat to 150°C, use a brush to dip a little drop onto the glass slide, slightly tilt the glass slide to make the asphalt flow slowly on the surface of the slide until it is smooth and free of bubbles, and the thickness of the asphalt on the prepared glass slide specimen is 1.5mm , put the finished new asphalt test specimen into the dust-proof device and cover it until ...

Embodiment 3

[0056] A method for determining the amount of old materials in recycled asphalt mixtures. First obtain the surface energies of new asphalt test specimens and old asphalt test specimens, then preset the surface energy of the required recycled asphalt, and finally bring it into the calculation formula Get the amount of old material in the required recycled asphalt, the specific steps are as follows:

[0057] (1) First clean the glass slide with distilled water to remove surface dust and other impurities, wipe the surface of the glass slide with absorbent cotton balls, and dry it close to a thermal electric furnace. Heat to 150°C, use a brush to dip a little drop onto the glass slide, slightly tilt the glass slide to make the asphalt flow slowly on the surface of the slide until it is smooth and free of bubbles, and the thickness of the asphalt on the prepared glass slide specimen is 1.5mm , put the finished new asphalt test specimen into the dust-proof device and cover it until ...

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Abstract

The invention relates to the technical field of asphalt regeneration, in particular to a method for determining the mixing amount of old materials in a regenerated asphalt mixture. The method comprises the following steps: respectively acquiring the surface energy of a new asphalt test piece and the surface energy of an old asphalt test piece, presetting the surface energy of the required recycled asphalt, and substituting the surface energy into a calculation formula to obtain the mixing amount of the old material in the required recycled asphalt, the calculation formula is x = (SFE1-SFE3)/(SFE2-SFE3) * 100%, SFE1 is the preset surface energy of the required recycled asphalt, and SFE2 is the preset surface energy of the required recycled asphalt. SFE2 is the surface energy of the old asphalt; sFE3 is the surface energy of new asphalt; x is the old material mixing amount (%). The method for determining the mixing amount of the old material in the recycled asphalt mixture is easy to operate, the mixing amount of the old material can be accurately determined, the detection time is saved, and raw materials are saved. Meanwhile, the recycled asphalt mixture obtained by the method for determining the mixing amount is good in pavement performance and worthy of being widely popularized and applied.

Description

technical field [0001] The invention relates to the technical field of asphalt regeneration, in particular to a method for determining the amount of old materials in recycled asphalt mixture. Background technique [0002] As an important symbol to measure a country's economic strength and modernization level, road traffic is an infrastructure that serves people's lives, social development and national economy. Under the working policy of "overall planning, integration of sections, layered responsibility, and joint construction", the development of my country's highway transportation industry has gained a rare opportunity, and there has been a leapfrog development, and transportation construction has truly become a key project of economic construction in various places. Day". With the rapid development of my country's economy, my country's highway construction has also achieved world-renowned achievements in a relatively short period of time. [0003] Although my country's ex...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N13/00G01N13/02
CPCG01N13/00G01N13/02G01N2013/0208
Inventor 张钦展李磊张春恩郑作华张润达王树涛张涛
Owner 中化学交通建设集团第二工程有限公司
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