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Foamed asphalt foaming effect evaluation and foaming parameter optimization method

A technology of foamed asphalt and foaming parameters, which is applied in the field of evaluation of foaming effect of foamed asphalt and optimization of foaming parameters, and can solve problems such as difficult operation and easy deviation in calculation

Pending Publication Date: 2021-09-10
山西省交通科技研发有限公司
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  • Application Information

AI Technical Summary

Problems solved by technology

Although it can avoid the deficiencies of expansion rate and half-life when evaluating asphalt foam, it is not easy to operate in practical applications, and deviations are prone to occur in calculations

Method used

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  • Foamed asphalt foaming effect evaluation and foaming parameter optimization method
  • Foamed asphalt foaming effect evaluation and foaming parameter optimization method
  • Foamed asphalt foaming effect evaluation and foaming parameter optimization method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Carry out foaming test on asphalt A, the foaming conditions are asphalt temperature 140°C, 150°C, 160°C, foaming water consumption 1%, 2%, 3%, 4%. The measured test result data are as follows.

[0031] Table 1 Asphalt foaming test results

[0032]

[0033] According to the requirements of expansion rate ≥ 10 times and half-life period ≥ 8s, the parameter range of foamed asphalt is initially selected. After screening, the foaming parameter conditions for primary selection are ①140°C, 3%; ②150°C, 2%; ③150°C, 3%; ④160 °C, 2%.

[0034] Under the four primary foaming conditions, mix the foamed asphalt and the milling material RAI, take 2kg of the mixture, spread it on a stainless steel plate with the same shape and size, and place it in an oven at 60°C. After drying for 6-8 hours, carry out image acquisition;

[0035] Digital image processing technology is used to process and analyze the image, and 4×4 grid division is selected. After image processing, the asphalt dist...

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Abstract

The invention belongs to the field of road engineering, and relates to a foamed asphalt foaming effect evaluation and foaming parameter optimization method. The method comprises the following steps: performing image acquisition on a mixed foamed asphalt mixture, analyzing and processing by adopting an MATLAB digital image technology, and evaluating the foaming effect and preferable foaming parameters of the foamed asphalt by taking the distribution uniformity of the asphalt as an index, wherein the uniform dispersion index parameters comprise an asphalt coating area ratio [sigma], a control coefficient M, an agglomeration index AI and a variable coefficient Cv of a coating rate after grid division. Compared with the prior art, the evaluation method provided by the invention can quickly and effectively evaluate the asphalt dispersion effect after the foamed asphalt mixture is mixed, and can calculate an accurate numerical value as a judgment basis to optimize the foaming parameters, thereby avoiding the defect that the foaming parameters are roughly determined by experience in the prior art; and the method has the advantages of being simple, rapid and easy to implement, and reliable basis and guiding significance can be provided in engineering.

Description

technical field [0001] The invention belongs to the field of road engineering, and in particular relates to a method for evaluating the foaming effect of foamed asphalt and optimizing foaming parameters. Background technique [0002] As a pavement regeneration method, foamed asphalt cold recycling technology can make full use of waste materials generated in road maintenance, and promote the transformation of road maintenance management to resource-saving and environment-friendly, and the foaming characteristics of asphalt affect the performance of foamed asphalt mixture. And one of the main factors of engineering performance. At present, the expansion rate and half-life are two indicators used to evaluate the foaming characteristics of asphalt. The expansion rate refers to the ratio of the maximum volume of the foamed asphalt in the foamed state to the volume of the asphalt when it is not foamed, reflecting the viscosity of the foamed asphalt; the half-life refers to the ti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/84G06T7/00G06T7/11G06T7/62G06T7/90
CPCG01N21/84G06T7/0002G06T7/11G06T7/90G06T7/62
Inventor 畅晓钰孔繁盛段丹军成志强常建勇高学凯贺文栋李亚龙吕子龙梁超李桢
Owner 山西省交通科技研发有限公司
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