Method used for detecting asphalt content of asphalt mixtures

Abstract

The invention relates to a method used for detecting asphalt content of asphalt mixtures. According to the method, the content of asphalt in the asphalt mixtures is determined by determination of percentage content of mineral powder, and further calculation of mineral powder weight in a separated extract. The method comprises 7 following steps: weighing and sampling, mixing, separating, weighing, calculating mineral powder percentage content, calculating mineral powder weight in extracted trichloroethylene, and calculating asphalt content in the asphalt mixtures. Compared with existing technology, the method possesses following beneficial effects: the method is simple in testing processes, efficiency is high, and accuracy of detection results is high. The method is suitable for asphalt amount detection in hot-mixed and hot-paved asphalt mixture pavement construction, and so that blending factory product quality is evaluated. The method is also suitable for determination of asphalt amount of the asphalt mixtures in old road investigation; an asphalt solution extracted using the method can be used for recovering asphalt, and so as to evaluate aging property of asphalt.

Description

technical field [0001] The invention relates to a method for measuring the content of materials in a mixture, in particular to a method for testing the content of asphalt in an asphalt mixture. Background technique [0002] Currently, the testing methods for asphalt content in asphalt mixture include high-temperature combustion method, centrifugal separation method, and solvent method. The centrifugation method in the prior art has steps such as weighing, sampling, mixing, weighing the residual amount, calculation, etc., because its weighing is aimed at the quality of the missing ore powder, when weighing the mixture in the extract, it must either Use a pressure filter for weighing, or use a combustion method for weighing. This method has more residual mixture and relatively low accuracy of measurement results. However, when weighing materials such as filter paper and dried materials in the crucible, it is often necessary to scrape out the materials, which will inevitably c...

AI Technical Summary

Problems solved by technology

The centrifugation method in the prior art has steps such as weighing, sampling, mixing, weighing the residual amount, calculation, etc., because its weighing is aimed at the quality of the missing ore powder, when weighing the mixture in the extract, it must either Use a pressure filter for weighing, or use the combustion method for weighing. This method has more residual mixture and relatively low accuracy of measurement results.

For weighing materials such as filter paper and dried materials in the crucible, it is often necessary to scrape out the materials, which will inevitably cause material loss and inaccurate test results.

Moreover, when scraping the quality of the missing ore powder, this method requires fine-grained operation, high requirements for operation, complicated test steps, and large errors, resulting in low accuracy of the measured asphalt content.

[0003] The relevant technical content of the present invention has not been reported