Method for detecting dielectric constant of irregularly-shaped aggregate

Abstract

The present invention discloses a method for detecting the dielectric constant of an irregularly-shaped aggregate. The method comprises the following steps that: after being weighed, the irregularly-shaped aggregate is mixed with liquid paraffin, and the mixture of the irregularly-shaped aggregate and the liquid paraffin is poured into a mold, after the mixture is cooled, so that a regularly-shaped paraffin and aggregate two-phase mixture can be obtained; a pure paraffin sample is prepared with the same mold; the sample is weighed, and the volume of the sample is calculated, so that the density of solid paraffin is obtained, and the volume ratio of the paraffin to the aggregate in the paraffin and aggregate two-phase mixture is obtained; the dielectric constants of the pure paraffin sample and the two-phase mixture are measured through a dielectric constant test system; and a composite material linear model is inferred, so that the dielectric constant calculation formula of the aggregate can be obtained. The test method used in the invention is simple and convenient, can measure the dielectric constant of the irregularly-shaped aggregate and is of great significance for the research of the dielectric properties of asphalt mixtures and the improvement of the detection precision and applicability of ground penetrating radars. The test method can meet actual requirements from the aspects of the rationality of test schemes and the convenience of test operation.

Description

technical field [0001] The invention belongs to the field of road engineering and relates to a method for detecting the dielectric constant of irregularly shaped aggregates. Background technique [0002] With the gradual improvement of my country's highway infrastructure, the peak period of construction has gradually receded. On the one hand, the construction environment of roads under construction and planned roads is mostly concentrated in the central and western regions with difficult geographical environments, and the requirements for construction control and quality are stricter than before; on the other hand, a large number of roads need to be maintained and Maintenance, after the road is completed and put into use, due to the repeated load and wear of the wheels and the influence of various natural factors, cracks, voids, subsidence, shifting, looseness and other diseases are common, and quality inspection is particularly important, which requires quality inspection ...

AI Technical Summary

Problems solved by technology

The existing composite permittivity model does not fit the engineering reality well, so the determination of the dielectric constant of the aggregate can help to correct the existing composite permittivity model, thereby improving the detection accuracy of ground penetrating radar and making it better applied to engineering practice

However, due to the irregular shape of the aggregate surface, it is difficult to measure the dielectric constant

[0005] There are not many domestic studies in this field, mainly focusing on microwave remote sensing, geological survey and oil logging, and the objects are mostly typical ground objects such as water, rock and soil. without much research

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