Method for framework recovery during multi-empty road surface regeneration

Abstract

The invention provides a method for framework recovery during multi-empty road surface regeneration. The voidage of a bituminous mixture and the mass center distance of a framework material serve as control standards, and parameters of an original material and a new material of multi-empty road surface regeneration are calculated. The method comprises the steps that a core taken from an original road is subjected to CT scanned image analysis, and the original material gradation and geometrical information of all stones are obtained; according to the target gradation, a target test piece is prepared, and the mass center distance and voidage of the target test piece are obtained through CT scanned image analysis; and value models of the stones of all gradations are built through discrete element software, and the parameters of the original material and the new material are obtained according to the mass center distance and voidage of the target test piece. Compared with an existing bituminous mixture regeneration technology, the design method pays attention to distribution of coarse aggregate and the voidage of the road surface after regeneration, the difficult problem that the drainage property gets poor during multi-empty road surface regeneration is solved through a value method from the micro perspective, the gradation design process during regeneration is optimized, the optimal solution can be more quickly and more accurately found through computer aided design, and the high engineering value is achieved.

Description

technical field [0001] The invention relates to the field of road engineering, in particular to a method for restoring skeletons during regeneration of porous road surfaces. Background technique [0002] my country's asphalt pavement has good recycling value. Therefore, if the efficient recycling of old asphalt mixture can be realized, it will not only greatly save resources, alleviate the shortage of road construction and maintenance funds, but also protect the ecological environment, which is in line with the current sustainability. The general trend of development. The current research on porous pavement regeneration technology lacks the analysis of the restoration of skeleton materials, which leads to the decline of the anti-rutting performance and drainage and noise reduction performance of the modified pavement. Therefore, the limitations of the existing design methods make it impossible to fully guarantee the recovery of the skeleton performance during the regeneratio...

AI Technical Summary

Problems solved by technology

The current research on the regeneration technology of porous pavement lacks the analysis of the restoration of the skeleton material, which leads to the decline of the anti-rutting performance and drainage and noise reduction performance of the modified pavement

Therefore, the limitations of the existing design methods make it impossible to fully guarantee the recovery of the skeleton performance during the regeneration of multi-void pavements.

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