Matching method for mixture mix ratio at regenerative microcapsule position based on torsional shear test

Abstract

The invention provides a matching method for a mixture mix ratio at a regenerative microcapsule position based on torsional shear test. The invention belongs to the technical field of road maintenance engineering technology, and particularly relates to a matching method for the mixture mix ratio at the regenerative microcapsule position based on the torsional shear test. The method comprises the following steps of 1, screening over-particle-diameter particles in RAP according to the type of the selected microcapsule position; 2, determining mineral aggregate gradation and cold asphalt content of the RAP material; 3, determining the proportions of the RAP material and new aggregate according to the target gradation at the selected microcapsule position, RAP material mineral aggregate gradation and an old material mixing ratio; 4, selecting modified emulsified bitumen in an optimizing manner; 5, testing workability; 6, determining an oil amount range; 7, defining an optimal asphalt amount; and determining the mix ratio of the mixture at the regenerative microcapsule position. According to the matching method, the RAP material can be reasonably utilized at the regenerative microcapsule position for obtaining the mixture with excellent pavement performance at the regenerative microcapsule position, and therefore the matching method has high popularization value.

Description

technical field [0001] The invention belongs to the technical field of road engineering maintenance engineering, and in particular relates to a method for designing the mixing ratio of recycled micro-surface mixtures based on torsional shear tests. Background technique [0002] With the rapid development of my country's transportation industry, a network of trunk roads with expressways as the skeleton has basically formed, and the mileage of highways has continued to increase. A large number of asphalt pavements have entered the renovation stage. The large amount of old materials that have been repaired are not only difficult to pile up, but also cause serious pollution to soil and water sources if they are not handled properly. Therefore, how to deal with old pavement materials is an urgent need for road construction in my country. The problem. The pavement recycling technology currently adopted in my country has defects such as low utilization rate of old materials, insuff...

AI Technical Summary

Problems solved by technology

Due to the extremely high requirements of micro-surfacing on its constituent materials, the research direction of this industry mainly focuses on the firmness and wear resistance of stone materials, the adhesion of asphalt, and the polishing value. On the one hand, there are few studies at home and abroad, and the design method of the mixture ratio of recycled micro-surfacing is still in the blank stage

Images