Designed compaction number-of-times determining method of emulsified asphalt cold recycled mixture

Abstract

The invention discloses a designed compaction number-of-times determining method of an emulsified asphalt cold recycled mixture. The method comprises the following steps of a first step, molding the emulsified asphalt cold recycled mixture with different factors by means of SGC; a second step, determining a maximal compaction number-of-times Nmax, back-calculating and drawing a compaction curve of the emulsified asphalt cold recycled mixture, and calculating a corresponding compaction parameter according to each compaction curve; a third step, researching sensitivity of each factor to all compaction by means of a single-factor variance analysis method, and evaluating effectiveness of each compaction parameter; and a fourth step, determining a significant influence factor of a designed compaction number-of-times Ndes, finding out main affecting factors by means of a stepwise regression analysis method, and establishing a regression equation of the designed compaction number-of-times Ndes. According to the designed compaction number-of-times determining method, the stepwise regression analysis method is utilized; compaction temperature and emulsified asphalt amount are determined as main factors; and a standard regression equation of the designed compaction number-of-times Ndes of the emulsified asphalt cold recycled mixture is established.

Description

technical field [0001] The invention relates to a method for determining the design compaction times of emulsified asphalt cold recycled mixture, and belongs to the technical field of emulsified asphalt cold recycled mixture. Background technique [0002] According to the applicant's understanding, according to my country's highway asphalt pavement recycling technical specifications, the compaction degree of emulsified asphalt cold recycled pavement should reach more than 90% in expressways and first-class highways, and it should be more than 90% in second-class and lower roads. Reach above 88%. However, due to the influence of many factors, in different actual engineering projects, the pavement compaction degree of emulsified asphalt cold recycling technology often shows large fluctuations. Under inappropriate construction conditions, the compaction requirements cannot even be met, which will have a certain impact on the crack resistance of the emulsified asphalt cold recyc...

AI Technical Summary

Problems solved by technology

[0008] At present, there have been literatures on the mixing ratio design and road performance of emulsified asphalt cold recycled mixture, but there is no comprehensive study on the compaction characteristics of emulsified asphalt cold recycled mixture, especially for emulsified asphalt cold recycled mixture. There are few studies on the design compaction times of the mixture

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