A refined detection and evaluation method for compaction uniformity of asphalt pavement

Abstract

The invention relates to a bituminous paving compacting uniformity refinement detection and evaluation method. According to the invention, a non-nuclear density gauge PQI is used for testing density of different areas of the bituminous paving according to reasonable detection spacing, a statistics analysis is carried out on density data, density repeatability standard deviation Sr and SR in the paving and among the pavings are detected, density consistency accountancy capability k and h in the paving and among the pavings are detected, density distribution uniformity of the detection road can be evaluated in a quantification mode, a core sample is drilled on a low density representative point, gap distribution characteristic on a CT cross-sectional image on the core sample can be analyzed by an image processing technology, the section gap quantity homogeneity coefficient UCN and section void fraction homogeneity coefficient UCR are calculated, gap distribution uniformity in the bituminous paving can be reflected according to the gap quantity and void fraction of the cross-sectional image, compacting quality uniformity of the bituminous paving can be comprehensively evaluated according to integral and local aspects, and the disadvantages of compacting uniformity detection index of the bituminous paving lacked in a current pavement quality acceptance system can be made up.

Description

technical field [0001] The invention belongs to the application field of evaluating the uniformity of asphalt pavement construction, and in particular relates to a refined detection and evaluation method for the compaction uniformity of asphalt pavement. Background technique [0002] Ensuring uniform and stable quality is the most important principle of any structure and material design, and the same is true for asphalt pavement. Non-uniformity is the phenomenon of uneven and unstable quality in local areas of asphalt pavement, and it is necessary to prevent the phenomenon of non-uniformity of asphalt pavement. Under the action of traffic load and natural factors, the non-uniform parts will first appear local damage, and then develop into larger area damage. Inhomogeneity has become the main cause of early disease of asphalt pavement. At present, the research on the heterogeneity of asphalt pavement is mostly concentrated in the design and production stage of the mixture, ...

AI Technical Summary

Problems solved by technology

Due to the lack of evaluation indicators related to the distribution uniformity of pavement materials, it is impossible to evaluate the construction uniformity of asphalt pavement during the delivery (completion) acceptance, which causes the contractor to lose the initiative and enthusiasm to ensure stable construction quality

Therefore, the lack of detection indicators reflecting the uniformity of asphalt pavement construction in the current pavement quality acceptance system is an important reason why the current asphalt pavement has various detection indicators that meet the requirements of the specification, but the disease still occurs

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