Material Properties of Cold In-Place Recycled and Full-Depth Reclamation Asphalt Concrete (2017) / Chapter Skim
Currently Skimming:
Pages 13-20
The Chapter Skim interface presents what we've algorithmically identified as the most significant single chunk of text within every page in the chapter.
Select key terms on the right to highlight them within pages of the chapter.
From page 13... ...
13 To focus on the desired structural properties of the recycled materials, the dynamic modulus and RLPD tests were performed to investigate the stiffness and rutting susceptibility, respectively, of each test specimen. Before testing, the project team had to decide if the testing and expected properties of the recycled materials best matched those of an asphalt mixture or of a loosely bound granular material.
|
From page 14... ...
14 Material Properties of Cold In-Place Recycled and Full-Depth Reclamation Asphalt Concrete Next, the bulk specific gravity of each test specimen was determined in accordance with AASHTO T 331, Standard Method of Test for Bulk Specific Gravity (Gmb) and Density of Compacted Hot Mix Asphalt (HMA)
|
From page 15... ...
Specimen Preparation and Testing Methods 15 Location Project ID Average Bulk Density (lb./ft.3) Coefficient of Variation (%)
|
From page 16... ...
16 Material Properties of Cold In-Place Recycled and Full-Depth Reclamation Asphalt Concrete 3.2 Small-scale Test Specimen Geometry The |E* | and RLPD tests frequently are performed using the AMPT.
|
From page 17... ...
Specimen Preparation and Testing Methods 17 A unique set of gluing jig arms was needed for the small-scale specimens because of their decreased diameter. The upper portion of each gluing jig arm had to be extended so that the arm could apply pressure to the LVDT stud as it was being glued to the specimen.
|
From page 18... ...
18 Material Properties of Cold In-Place Recycled and Full-Depth Reclamation Asphalt Concrete 3.3 Dynamic Modulus Testing The relationship between stress and strain under continuously applied sinusoidal loading for a linear viscoelastic material is defined as the complex modulus (E*
|
From page 19... ...
Specimen Preparation and Testing Methods 19 β, γ are shape parameters. The temperature dependency of the modulus is incorporated in the reduced time parameter tR: t t a TR ( )
|
From page 20... ...
20 Material Properties of Cold In-Place Recycled and Full-Depth Reclamation Asphalt Concrete in which ep is the permanent strain, N is the number of cycles applied, A is the regression constant representing the intercept in log-log space, and B is the regression constant representing the slope of the line in log-log space. This analysis methodology is particularly appropriate when testing mixtures in a confined state that tend not to reach tertiary flow.
|
Key Terms
This material may be derived from roughly machine-read images, and so is provided only to facilitate research.
More
information on Chapter Skim is available.