Yoshinori Oyanagi

Study on Durability of Asphalt Stabilized Materials Improvement Scheme

Osamu Takahashi

Case study on asphalt pavements in expressways in Japan, due to drainage asphalt pavement spread range upper base and subbase layer subbase so that occasionally.Therefore, large-scale repair work until the surface layer from the underlying subbase out beating increase is concerned.Was found that relatively early progress to the entire pavement, the crack from the bottom of the upper Board, under such circumstances, highway excavation survey were implemented, lower following bearing capacity is declining.It would need to build solid underlying subbase layer to curb such crack initiation and propagation, to thus achieve longer service life of asphalt pavement, as well as improve the durability of the upper Board.And must also improve the durability of asphalt stabilized materials used in upper roadbed of Highway asphalt stabilized materials, with stabilized granular subbase general upper base course materials in addition to supplemental asphalt materials should.Case study on asphalt pavements in expressways in Japan, due to drainage asphalt pavement spread range upper base and subbase layer structure so that occasionally.Therefore, asphalt stabilized materials are expected to be low-cost, wasn't eligible for the research and development so far.
In this study, understand the basic physical properties of asphalt stabilized materials investigated for increased durability. Without the use of special materials, focusing on aggregate grain size and the maximum aggregate grain size by mixing on a minor overhaul aims to increase durability, evaluated the effect of.
In this study, bending and static bending test for three types of asphalt stabilized materials WT and fatigue tests, conducted got the following findings.In this study, bending and static bending test for three types of asphalt stabilized materials WT and fatigue tests, conducted got the following findings.Bending by increasing the amount of asphalt fatigue testing, ABa (20) is the lowest fatigue crack resistance results showed improvement is expected.No dynamic stability problems if WT tests, reduce the maximum aggregate grain size asphalt content less important results.As deemed necessary to improve the durability of asphalt stabilized materials suggest, among the 4.0%~5.0% and adjusting amount of asphalt, and then maximum aggregate grain size 20 mm

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